CN116428088B

CN116428088B - Engine start-stop control method and device for light hybrid vehicle and light hybrid vehicle

Info

Publication number: CN116428088B
Application number: CN202310459511.9A
Authority: CN
Inventors: 伍庆龙
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2024-12-27
Anticipated expiration: 2043-04-25
Also published as: CN116428088A

Abstract

The invention discloses an engine start-stop control method and device of a light-mixing vehicle and the light-mixing vehicle. The method comprises the steps of obtaining a multi-dimensional data set of the light-mixing vehicle, wherein the multi-dimensional data set is used for representing real-time running states and fault states of the light-mixing vehicle, determining a target start-stop mode to be used based on the multi-dimensional data set, and controlling an engine of the light-mixing vehicle to start or stop according to the target start-stop mode. The invention solves the technical problem that the engine service life of the light-mixed vehicle in the related art is reduced due to unstable engine starting and long starting time under different working conditions.

Description

Engine start-stop control method and device for light hybrid vehicle and light hybrid vehicle

Technical Field

The invention relates to the field of automobile engines, in particular to an engine start-stop control method and device for a light-weight hybrid vehicle and the light-weight hybrid vehicle.

Background

The conventional vehicle generally adopts a method for controlling the start and stop of an engine by using a 12V starter, and the method has the problem that the service life of the engine is reduced due to long starting time and frequent starting and stopping. Compared with the traditional vehicle, the hybrid vehicle is added with the motor and the power battery, and in the starting and stopping process of the engine, the motor and the power battery can be utilized to realize more excellent starting and stopping performance. The hybrid vehicles generally comprise a strong hybrid vehicle (the mixing degree is not lower than 50%), a moderate hybrid vehicle (the mixing degree is about 30%) and a light hybrid vehicle (the mixing degree is lower than 20%), wherein the light hybrid system of the light hybrid vehicle can realize quick starting of the whole vehicle and reduce the fuel consumption of the vehicle, and is valued by automobile manufacturers at home and abroad.

However, the engine start-stop control method of the light hybrid vehicle provided by the related art only uses a small amount of data such as the water temperature of the engine and the residual capacity of the storage battery as control conditions for start-stop control of the vehicle engine, so that the accuracy of the start-stop control process of the vehicle engine is poor, and further the stability of the vehicle engine in the start-stop process is poor and the starting time is long, thereby reducing the service life of the vehicle engine.

Aiming at the problem that the engine service life of the light-weight hybrid vehicle is reduced due to unstable engine starting and long starting time under different working conditions in the related art, no effective solution is proposed at present.

Disclosure of Invention

The embodiment of the invention provides an engine start-stop control method and device for a light-weight hybrid vehicle and the light-weight hybrid vehicle, which at least solve the technical problems that in the related art, the engine of the light-weight hybrid vehicle is unstable under different working conditions, and the starting time is long, so that the service life of the engine is reduced.

According to an aspect of an embodiment of the present invention, there is provided an engine start-stop control method of a light-hybrid vehicle, including:

The method comprises the steps of obtaining a multi-dimensional data set of the light-mixing vehicle, wherein the multi-dimensional data set is used for representing real-time running states and fault states of the light-mixing vehicle, determining a target start-stop mode to be used based on the multi-dimensional data set, and controlling an engine of the light-mixing vehicle to start or stop according to the target start-stop mode.

Optionally, the multi-dimensional data set includes vehicle speed, gear, motor torque, air conditioner operating parameters, brake vacuum, accelerator pedal opening, brake pedal opening, battery remaining capacity, engine water temperature, key status, start-stop function switch parameters, light-hybrid system fault parameters, and motor fault parameters.

Optionally, determining the target start-stop mode to be used based on the multi-dimensional data set comprises determining whether the light-hybrid vehicle starts the vehicle for the first time in the current running task according to the key state and the running cycle count value of the light-hybrid vehicle, and determining the target start-stop mode to be used based on the multi-dimensional data set in response to the first start of the light-hybrid vehicle.

Optionally, determining the target start-stop mode to be used based on the multi-dimensional data set comprises determining the target start-stop mode to be a first parking stop mode in response to the multi-dimensional data set acquired and updated in real time meeting a first stop triggering condition under the condition that the multi-dimensional data set meets the first preset electric quantity threshold, wherein the first condition comprises determining that the light mixing system is not faulty according to a fault parameter of the light mixing system, determining that the motor is not faulty according to a motor fault parameter, determining that a start-stop function is started according to a start-stop function switching parameter, the vehicle speed is zero, the gear is in a forward gear or a reverse gear, the motor torque is higher than a preset start-up threshold, determining that the air conditioner is not required to be cooled or heated according to an air conditioner operation parameter, the braking vacuum is higher than a preset braking threshold, the residual capacity of a battery is higher than a first preset electric quantity threshold, the engine water temperature is higher than a preset water temperature threshold, the first parking triggering condition comprises switching the gear to a parking gear or a neutral gear, the first parking stop mode comprises controlling the engine to be stopped, keeping the starter and the motor to be in a closed state, keeping the clutch in a full-on state, and controlling the gear to be kept in a parking or a neutral gear.

The method comprises the steps of determining that a light mixing system is in fault according to a fault parameter of the light mixing system, determining that a motor is in fault according to a motor fault parameter, determining that a start-stop function is on according to a start-stop function switching parameter, a vehicle speed is zero, a gear is in a forward gear or a reverse gear, motor torque is higher than a preset start-up threshold, determining that an air conditioner does not have refrigeration or heating requirements according to an air conditioner operation parameter, braking vacuum is higher than a preset braking threshold, battery residual capacity is higher than a first preset electric quantity threshold, engine water temperature is higher than a preset water temperature threshold, and brake pedal opening is not in a default value.

The method comprises the steps of determining whether a motor is in a fault state according to a motor fault parameter, determining that a start-stop function is started according to a start-stop function switching parameter, a vehicle speed is zero, a gear is in a stop gear or neutral position, motor torque is higher than a preset start-up threshold value, determining that an air conditioner has refrigeration or heating requirements according to air conditioner operation parameters, braking vacuum is lower than a preset braking threshold value, battery residual capacity is lower than a second preset electric quantity threshold value, accelerator pedal opening is larger than a preset acceleration threshold value, gear is switched to a forward gear or a reverse gear, determining that the starter is closed according to the start-stop function switching parameter, controlling the engine to spray oil, keeping the motor to be in a closed state, controlling the motor to be switched to a full-on state or keeping the clutch to be in a full-on state, and keeping the clutch to be in a stop gear.

Optionally, the method for determining the target start-stop mode to be used based on the multi-dimensional data set further comprises the step of determining that the target start-stop mode is a second stop start-stop mode in response to the multi-dimensional data set acquired and updated in real time meeting a second start-stop trigger condition when the multi-dimensional data set meets a fourth condition, wherein the fourth condition comprises the step of determining that a light mixing system is free of faults according to a fault parameter of the light mixing system, the step of determining that a motor is free of faults according to a motor fault parameter, the step of determining that a start-stop function is on according to a start-stop function switch parameter, the speed of the vehicle is zero, the gear is in a forward gear or a reverse gear, the motor torque is higher than a preset start-stop threshold, the step of determining that the brake master cylinder pressure is higher than the preset pressure threshold according to the opening degree of a brake pedal, the second start-stop trigger condition is at least one of meeting the following requirements that the air conditioner is met according to the air conditioner operation parameter, the brake vacuum is lower than the preset brake threshold, the residual capacity of a battery is lower than the second preset electric quantity threshold, the step of determining that the start-stop function is off according to the start-stop function switch parameter, the second stop mode comprises the step of controlling the engine to be in an oil-injected state, keeping the starter to be in a closed state, controlling the motor to be switched to be in a state, controlling to be in a full-drive state, and keeping state to be kept in a forward gear or in a forward gear.

Optionally, determining the target start-stop mode to be used based on the multi-dimensional data set further comprises determining that the light-mixing system has a fault in response to the fault parameters of the light-mixing system in the multi-dimensional data set, determining that the target start-stop mode is a first fault-stop mode, wherein the first fault-stop mode comprises controlling the light-mixing vehicle to start a limp-home mode and generating a system fault message, the system fault message is used for assisting a driver to stop and stop the light-mixing vehicle, determining that the motor has a fault or the motor torque is not higher than a preset starting threshold value in response to the fault parameters in the multi-dimensional data set, and determining that the target start-stop mode is a second fault-stop mode, wherein the second fault-stop mode comprises controlling the starter to switch to an on state, receiving a fault grade signal corresponding to the motor, and controlling the starter to start the engine according to the fault grade signal.

According to another aspect of the embodiment of the present invention, there is also provided an engine start-stop control device for a light-hybrid vehicle, including:

The system comprises an acquisition module, a determination module and a control module, wherein the acquisition module is used for acquiring a multi-dimensional data set of the light-mixing vehicle, the multi-dimensional data set is used for representing a real-time running state and a fault state of the light-mixing vehicle, the determination module is used for determining a target start-stop mode to be used based on the multi-dimensional data set, and the control module is used for controlling an engine of the light-mixing vehicle to start or stop according to the target start-stop mode.

Optionally, the acquisition module is further used for the multi-dimensional data set including a vehicle speed, a gear, a motor torque, an air conditioner operation parameter, a brake vacuum degree, an accelerator pedal opening degree, a brake pedal opening degree, a battery residual capacity, an engine water temperature, a key state, a start-stop function switch parameter, a light mixing system fault parameter and a motor fault parameter.

Optionally, the determining module is further used for determining whether the light-mixed vehicle starts up for the first time in the current driving task according to the key state and the driving cycle count value of the light-mixed vehicle, and determining a target start-stop mode to be used based on the multi-dimensional data set in response to the first start-up of the light-mixed vehicle.

Optionally, the determining module is further configured to determine that the target start-stop mode is a first parking mode in response to the multi-dimensional data set acquired and updated in real time satisfying a first stop trigger condition when the multi-dimensional data set satisfies a first condition, wherein the first condition includes determining that the light-mixing system has no fault according to a fault parameter of the light-mixing system, determining that the motor has no fault according to a motor fault parameter, determining that a start-stop function is on according to a start-stop function switching parameter, a vehicle speed is zero, a gear is in a forward gear or a reverse gear, a motor torque is higher than a preset start-up threshold, determining that an air conditioner has no refrigeration or heating requirement according to an air conditioner operation parameter, a braking vacuum is higher than a preset braking threshold, a battery residual capacity is higher than a first preset electric quantity threshold, an engine water temperature is higher than a preset water temperature threshold, the first parking trigger condition includes that the gear is switched to a parking gear or a neutral gear, the first parking mode includes controlling an engine to be fuel-off, maintaining a starter and the motor to be in a closed state, maintaining the clutch to be in a full-on state, and controlling the gear to be maintained in the parking gear or the neutral.

The determining module is further used for determining that the target start-stop mode is a second stop-stop mode in response to the multi-dimensional dataset meeting a second stop triggering condition when the multi-dimensional dataset meets a second condition, wherein the second condition comprises that no fault exists in a light mixing system according to a fault parameter of the light mixing system, no fault exists in a motor according to a fault parameter of the motor, a start-stop function is determined to be started according to a start-stop function switching parameter, the vehicle speed is zero, the gear is in a forward gear or a reverse gear, the motor torque is higher than a preset start-up threshold, no refrigeration or heating requirement is determined to exist in an air conditioner according to an air conditioner operation parameter, the braking vacuum is higher than a preset braking threshold, the residual capacity of a battery is higher than a first preset electric quantity threshold, the water temperature of an engine is higher than a preset water temperature threshold, the opening degree of a brake pedal is not in a default value, the second stop triggering condition comprises that the opening degree of the brake pedal is increased to be higher than a preset pressure threshold, the second stop-stop mode comprises that the engine is controlled to stop oil, the starter and the motor is kept in a closed state, the clutch is kept in a full-on state, and the forward gear or reverse gear is kept.

The determining module is further used for determining that the target start-stop mode is a first stop start mode in response to the fact that the multi-dimensional data set collected and updated in real time meets a first start trigger condition when the multi-dimensional data set meets a third condition, wherein the third condition comprises that no fault exists in a light mixing system according to a fault parameter of the light mixing system, no fault exists in a motor according to a fault parameter of the motor, start-stop function is determined to be started according to a start-stop function switch parameter, the vehicle speed is zero, the gear is in a parking gear or neutral position, the motor torque is higher than a preset start threshold, the first start trigger condition is at least one of determining that the air conditioner has refrigeration or heating requirements according to an air conditioner operation parameter, the braking vacuum is lower than a preset braking threshold, the remaining capacity of a battery is lower than a second preset electric quantity threshold, the opening degree of an accelerator pedal is larger than a preset acceleration threshold, the gear is switched to a forward gear or a reverse gear, the start-stop function is determined to be closed according to the start-stop function switch parameter, the first start-stop mode comprises controlling the engine to be ignited, controlling the starter to be kept in a closed state, controlling the motor to be switched to be in an electric drive state, the clutch to be kept in a full-on state, and kept in the parking gear or in the parking gear is kept.

The determination module is further used for determining that the target start-stop mode is a second stop start-stop mode in response to the fact that the multi-dimensional data set collected and updated in real time meets a second start-stop trigger condition under the condition that the multi-dimensional data set meets a fourth condition, wherein the fourth condition comprises determining that a light mixing system is free of faults according to fault parameters of the light mixing system, determining that a motor is free of faults according to fault parameters of a motor, determining that a start-stop function is started according to start-stop function switching parameters, the vehicle speed is zero, a gear is in a forward gear or a reverse gear, the motor torque is higher than a preset start-stop threshold, determining that the brake master cylinder pressure is higher than a preset pressure threshold according to the opening degree of a brake pedal, determining that the air conditioner has refrigeration or heating requirements according to air conditioner operation parameters, the brake vacuum is lower than a preset brake threshold, the residual capacity of a battery is lower than a second preset electric quantity threshold, determining that the start-stop function is closed according to the start-stop function switching parameters, controlling the engine to spray ignition, keeping the starter in a closed state, controlling the motor to switch to an electric driving state, keeping the clutch in a full-on state, and keeping the clutch in the forward gear or the reverse gear.

Optionally, the determining module is further configured to determine that the light-mixing system has a fault in response to determining that the light-mixing system has the fault according to the fault parameters of the light-mixing system in the multi-dimensional data set, and determine that the target start-stop mode is a first fault stop mode, where the first fault stop mode includes controlling the light-mixing vehicle to start a limp-home mode and generating a system fault message, where the system fault message is used to assist a driver in performing stop control on the light-mixing vehicle, and determine that the motor has the fault or the motor torque is not higher than a preset start-up threshold according to the motor fault parameters in the multi-dimensional data set, and determine that the target start-stop mode is a second fault stop mode, where the second fault stop mode includes controlling a starter to switch to an on state, receiving a fault level signal corresponding to the motor, and controlling the starter to start the engine according to the fault level signal.

According to still another aspect of the embodiments of the present invention, there is also provided a light-hybrid vehicle including an on-board memory in which a computer program is stored, and an on-board processor configured to run the computer program to perform the engine start-stop control method of the light-hybrid vehicle of any one of the foregoing.

In the embodiment of the invention, firstly, a multi-dimensional data set of the light-mixing vehicle is obtained, wherein the multi-dimensional data set is used for representing the real-time running state and the fault state of the light-mixing vehicle, then, the target start-stop mode to be used is determined based on the multi-dimensional data set, finally, the engine of the light-mixing vehicle is controlled to start or stop according to the target start-stop mode, and the target start-stop mode of the engine is determined based on the multi-dimensional data set of the light-mixing vehicle, so that the purpose of accurately controlling the start-stop of the engine of the light-mixing vehicle by utilizing the multi-dimensional data set is achieved, the technical effects of improving the accuracy of the start-stop control process of the engine of the light-mixing vehicle, improving the user experience and reducing the fuel consumption are achieved, and the technical problems of unstable start-up time of the engine of the light-mixing vehicle under different working conditions in the related technologies are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a block diagram of a hardware architecture of an alternative vehicle terminal for an engine start-stop control method for a light-hybrid vehicle according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of a light-weight system of a light-weight vehicle according to an embodiment of the present invention;

FIG. 3 is a flow chart of a method of engine start-stop control of a light-hybrid vehicle according to an embodiment of the present invention;

FIG. 4 is a flow chart of an engine first start process for a light hybrid vehicle according to an embodiment of the present invention;

fig. 5 is a block diagram showing the structure of an engine start-stop control device for a light-hybrid vehicle according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

According to an embodiment of the present invention, there is provided a method embodiment of an engine start-stop control method of a light-hybrid vehicle, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order other than that shown herein.

Fig. 1 is a block diagram of the hardware architecture of a vehicle terminal for an alternative engine start-stop control method for a light-hybrid vehicle, according to an embodiment of the invention, as shown in fig. 1, a vehicle terminal 10 (or a mobile device 10 associated with a vehicle having communication) may include one or more processors 102 (the processors 102 may include, but are not limited to, a processing means such as a microprocessor (Microcontroller Unit, MCU) or programmable logic device (Field Programmable GATE ARRAY, FPGA), a memory 104 for storing data, and a transmission device 106 for communication functions. Among other things, display device 110, input/output device 108 (i.e., I/O device), universal serial bus (Universal Serial Bus, USB) port (which may be included as one of the ports of a computer bus, not shown), network interface (not shown), power supply (not shown), and/or camera (not shown) may be included. It will be appreciated by those skilled in the art that the configuration shown in fig. 1 is merely illustrative and is not intended to limit the configuration of the vehicle terminal 1 described above. For example, the vehicle terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.

It should be noted that the one or more processors 102 and/or other data processing circuits described above may be embodied in whole or in part in software, hardware, firmware, or any combination thereof. Further, the data processing circuitry may be a single stand-alone processing module, or incorporated in whole or in part into any of the other elements in the vehicle terminal 10 (or mobile device).

The memory 104 may be used to store software programs and modules of application software, such as program instructions/data storage devices corresponding to the engine start-stop control method of the light-hybrid vehicle in the embodiment of the present invention, and the processor 102 executes the software programs and modules stored in the memory 104 to perform various functional applications and data processing, that is, implement the engine start-stop control method of the light-hybrid vehicle. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the vehicle terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission device 106 is used to receive or transmit data via a network. The specific examples of the network described above may include a wireless network provided by a communication provider of the vehicle terminal 10. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module for communicating with the internet wirelessly.

Fig. 2 is a schematic diagram of a light-mixing system of a light-mixing vehicle according to an embodiment of the invention, as shown in fig. 2, the light-mixing system of the light-mixing vehicle at least comprises an accelerator pedal 201 for controlling the opening and closing degree of a throttle valve of an engine 217 and further controlling the power output of the engine 217, a brake pedal 202 for limiting the power output of the engine 217 to control the light-mixing vehicle to slow down or stop, a vehicle controller (Vehicle Control Unit, VCU) 203 which is a core control part of the light-mixing vehicle and is used for sending control instructions to one or more other parts of the light-mixing vehicle (such as a Battery management system 205, a motor controller 206 and an engine control system 207) to control the operation of the light-mixing vehicle, a Direct-Current conversion controller 204 and a Direct-Current converter (Direct Current-Direct Current Converter) 213 which are all used for converting the Direct-Current power into Direct-Current power with different voltages, a Battery management system (Battery management MANAGEMENT SYSTEM, BMS) 205 for monitoring the state of the Battery to avoid abnormal conditions such as overcharge, overdischarge, and high temperature of the Battery, and the motor controller (Motor Control Unit, MCU) 206 is used for controlling the motor to respond to a set direction, a set angle, a time, and a speed.

As also shown in fig. 2, the light-weight hybrid vehicle light-weight hybrid system at least further comprises a gearbox controller (Transmission Control Unit, TCU) 208 for controlling and managing the gearbox 219, an anti-lock braking system (Antilock Brake System, ABS) 209 for automatically controlling the magnitude of the vehicle braking force when the light-weight hybrid vehicle is braked, thereby preventing the front wheels 220 and the rear wheels 221 from being locked so as to improve the safety of the light-weight hybrid vehicle, and an electronic stability system (Electronic Stability Program, ESP) 210 for analyzing the vehicle running information transmitted by various sensors (such as position sensors, speed sensors, temperature sensors and pressure sensors) of the vehicle and transmitting deviation correcting instructions to relevant components so as to maintain the dynamic balance of the light-weight hybrid vehicle.

Still as shown in fig. 2, the light-hybrid system of the light-hybrid vehicle at least comprises a 48V battery 211 for increasing the voltage of each component of the light-hybrid vehicle, providing greater driving power for a motor 215 to achieve rapid start-stop of the engine 217, an inverter 212 for adjusting the frequency and amplitude of the output voltage to control the speed and power of the vehicle, a 12V battery 214 for providing power for the components of the light-hybrid vehicle, a BSG (Belt-DRIVEN STARTER Generator) motor 215 for regulating the rotational speed of the engine 217, a starter 216 for converting the electrical energy of the power source (such as the 48V battery 211, the 12V battery 214) into mechanical energy to drive the flywheel of the engine 217 to start the engine 217, the engine 217 for driving the light-hybrid vehicle, a clutch 218 for cutting off or transmitting the power output from the engine 217, a gearbox 219 for transmitting the rotational speed and torque from the engine 217, front wheels 220 and rear wheels 221 for carrying the entire vehicle weight of the light-hybrid vehicle, transmitting braking force, torque, driving moment, and braking force, and shock of the light-hybrid vehicle can also be used for relieving and absorbing the impact caused by uneven ground.

In the above-mentioned operating environment, the embodiment of the present invention provides a method for controlling start and stop of an engine of a light-weight hybrid vehicle as shown in fig. 3, and fig. 3 is a flowchart of a method for controlling start and stop of an engine of a light-weight hybrid vehicle according to an embodiment of the present invention, as shown in fig. 3, where the embodiment shown in fig. 3 may at least include implementation steps, that is, the technical solutions implemented in steps S31 to S33.

Step S31, a multi-dimensional data set of the light-mixing vehicle is obtained, wherein the multi-dimensional data set is used for representing the real-time running state and the fault state of the light-mixing vehicle;

in an alternative solution provided in the above step S31, the light Hybrid vehicle (Mild Hybrid ELECTRIC VEHICLE, MHEV) is a Hybrid system vehicle that replaces or adds a set of 48V batteries (48V battery 211 shown in fig. 2) on the basis of the original 12V battery (12V battery 214 shown in fig. 2), and the light Hybrid vehicle can use the 48V batteries to improve the start-stop efficiency of the engine, so as to reduce the jerk of the vehicle during deceleration or braking, and can use the 48V batteries to supply power to other devices (such as an air conditioner compressor).

In an alternative provided in the step S31, the multi-dimensional data may be various types of vehicle data related to a start-stop control process of an engine of the light-hybrid vehicle, and the multi-dimensional data may include, but is not limited to, gear information, a state of an air conditioner, a state of a battery, and a state of a motor. The real-time operation State may be a real-time operation State Of each component Of the light-weight hybrid vehicle, specifically, for example, at a certain moment, the real-time operation State Of the light-weight hybrid vehicle is that the vehicle speed is 0, the gear is in a forward gear, the air conditioner has an on demand, the residual capacity (SOC) Of the storage battery is higher than 40%, the water temperature Of the engine is higher than 60 ℃, the fault State may be that whether a light-weight hybrid system Of the light-weight hybrid vehicle has a fault or not, and here, the fault type Of the light-weight hybrid system may include, but is not limited to, protection system faults (such as airbag damage and safety belt sensor damage), circuit faults (such as fuse fusing and high-voltage coil breaking), oil circuit faults (such as oil circuit blockage and nozzle damage).

In the alternative scheme provided by the invention, the multidimensional data set of the light-mixed vehicle is obtained by directly reading part of the data set (such as the vehicle speed and the residual capacity of a battery) through an instrument panel, and obtaining the corresponding data set by using a vehicle sensor, for example, collecting the water temperature of an engine by using a temperature sensor.

Step S32, determining a target start-stop mode to be used based on the multi-dimensional data set;

In an alternative provided by the step S32, the target start-stop mode may be one of a plurality of start-stop modes of an engine of the light hybrid vehicle, and the plurality of start-stop modes may include, but are not limited to, a stop start in a specific gear, and a stop in a specific gear. It is also noted herein that the aforementioned specific gear may include, but is not limited to, a parking gear (Parking, P gear), neutral (N gear), a forward gear (Drive, D gear, also referred to as Drive gear), a Reverse gear (R gear).

In the alternative scheme provided by the invention, the target start-stop mode to be used is determined based on the multi-dimensional data set, and the specific method comprises the steps of storing one or more engine start-stop conditions in a storage device of the light hybrid vehicle in advance, wherein the one or more engine start-stop conditions can be constraint conditions formed when one or more vehicle parameters acquire specific parameter values, and comparing the acquired multi-dimensional data set with the one or more engine start-stop conditions to determine the target start-stop mode under the target engine start-stop conditions. Specifically, for example, the vehicle parameters are the vehicle speed, the residual capacity of the storage battery and the water temperature of the engine, the start-stop conditions corresponding to the fuel cut-off and stop of the engine are that the vehicle speed is 0, the residual capacity of the storage battery is higher than 35 percent, and the water temperature of the engine is higher than 65 ℃, and when the collected multi-dimensional data set comprises the vehicle speed is 0, the residual capacity of the storage battery is 40 percent, and the water temperature of the engine is 68 ℃, the target start-stop mode of the engine can be determined to be the fuel cut-off and stop of the engine.

Step S33, controlling the engine of the light hybrid vehicle to start or stop according to the target start-stop mode.

In the alternative scheme provided by the invention, the engine of the light hybrid vehicle is controlled to start or stop according to the target start-stop mode, and the specific method can be that the target start-stop mode of the light hybrid vehicle is assumed to be engine oil-break stop, a control command is started to an engine control system 207 by using a whole vehicle controller 203 shown in fig. 2, the engine 217 is controlled to reduce torque, a clutch 218 is separated, and an oil-break handle is driven by an oil-break cylinder to control an oil pump of the engine 217 to stop oil supply.

The above-described methods of embodiments of the present invention are further described below.

In an alternative embodiment, the multi-dimensional data set includes vehicle speed, gear, motor torque, air conditioner operating parameters, brake vacuum, accelerator pedal opening, brake pedal opening, battery residual capacity, engine water temperature, key status, start-stop function switch parameters, light-mix system fault parameters, and motor fault parameters in step S31.

In the alternative scheme provided by the invention, the air conditioner operation parameters can comprise, but are not limited to, air quantity, compressor rotating speed, water flow and working temperature, can be used for determining the use requirements (such as refrigeration requirements and heating requirements) of the vehicle air conditioner, the braking vacuum degree can be the vacuum degree provided by a vacuum processor of the light-mixing vehicle when the vehicle brakes, the start-stop function switch parameters can be used for representing the state (such as triggering and closing) of an engine start-stop function of the light-mixing vehicle, the light-mixing system fault parameters can comprise, but are not limited to, protection system fault parameters (such as the state of an air bag and the state of a safety belt sensor), circuit fault parameters (such as the state of a fuse and the operation state of a high-voltage coil), and the motor fault parameters can comprise, but are not limited to, the state of an oil sprayer, the operation state of an ignition coil and the temperature of a motor.

In an alternative embodiment, in step S32, determining the target start-stop pattern to be used based on the multi-dimensional dataset comprises:

Step S3211, determining whether the light hybrid vehicle starts up for the first time in the current running task according to the key state and the running cycle count value of the light hybrid vehicle;

Step S3212, in response to the first start of the light hybrid vehicle, determining a target start-stop pattern to be used based on the multi-dimensional dataset.

In an alternative provided in the steps S3211 to S3212, the key status may include, but is not limited to, ignition start, turning on a power supply of the whole vehicle, locking, and powering on accessories. The running cycle count value can be a value acquired by an internal counter preset in the whole vehicle controller by a technician, and can be used for representing the number of times of starting an engine of the light hybrid vehicle in one running process. It should be noted that, in the primary driving process, when the key is used for ignition and the driving cycle count value acquired by the internal counter in real time is 1, the ignition starting process can be determined to be the first starting process of the engine, and when the light hybrid vehicle completes all driving tasks in the primary driving process and the stop time of the engine exceeds the preset time threshold, the driving cycle count value can be reset.

The above method is further described below in conjunction with fig. 4.

Fig. 4 is a flowchart of an engine start-up process of a light-weight hybrid vehicle according to an embodiment of the present invention, and as shown in fig. 4, ignition start is performed by using a key to control the light-weight hybrid vehicle, and whether the vehicle is started up for the first time is determined based on a running cycle count value acquired in real time (i.e., whether the running cycle count value acquired in real time is determined to be 1). Further, when the running cycle count value acquired in real time is not 1, other starting control is performed on the vehicle, when the running cycle count value acquired in real time is 1, the vehicle is determined to be in a first starting working condition, at this time, a starting module of a starter is utilized to judge whether the acquired multi-dimensional data (multi-dimensional factors) meet a first starting condition, and specifically, the first starting condition comprises, for example, a vehicle speed of 0, a vehicle gear of P gear or N gear, a starting and stopping function switch parameter of the vehicle represents that the vehicle is in a starting and stopping function triggering state, and a light mixing system has a fault (or the torque capacity of a motor does not meet the starting requirement).

As further shown in fig. 2 and 4, when the obtained multi-dimension does not meet the first-time starting condition, the vehicle is prohibited from starting, and when the obtained multi-dimension meets the first-time starting condition, the vehicle controller 203 is used for controlling the engine control system 207 to start the engine 217 through the starter 216, and then whether the starter 216 fails during the starting process of the engine 217 is judged. When one or more parts of the light hybrid system (such as a starter 216) are in fault during the starting process, a BSG motor 215 module is called to start, when all the parts of the light hybrid system are not in fault, and the acquired multi-dimensional data set meets the requirements that the vehicle speed is 0, the gear is P or N, the starting and stopping function of the vehicle is determined to be started based on starting and stopping function switching parameters of the vehicle, one or more parts of the light hybrid system are in fault or the torque capacity of the motor is not met, under the working condition, when the key-controlled vehicle is detected to start ignition for the first time, the starter 216 is controlled to drive the engine 217 to reach a preset rotating speed value (such as 1200 revolutions), and then the engine 217 is ignited by oil injection to finish the starting process, and the state of all the assemblies of the light hybrid vehicle is controlled to keep the starter 216 and the engine 217 in a starting state, keep the BSG motor 215 in the starting state, keep the gear in the P or N, and keep the clutch 218 in a fully-on state, so that the first starting of the engine 217 is realized.

In the alternative embodiment, the method has the advantages that the counter is arranged in the vehicle and is used for counting the running cycle count value of the vehicle, so that the first starting process of the vehicle is conveniently and accurately judged, the obtained multi-dimensional data (including the vehicle speed, the gear state, the start-stop function switching parameter, the light mixing system fault parameter and the motor fault parameter) is utilized to comprehensively judge whether the target start-stop mode of the light mixing vehicle is the first starting, the accuracy of the determined target start-stop mode based on the multi-dimensional data is improved, the accuracy of the first starting control of the engine of the light mixing vehicle by the target start-stop mode is further improved, the stability of the engine in the first starting process is improved, the response time of the engine in the first starting process is shortened, and the service life of the engine is prolonged.

In the case that the multi-dimensional data set satisfies the following first condition, the target start-stop mode is determined to be the first stop-stop mode in response to the multi-dimensional data set acquired and updated in real time satisfying the first stop trigger condition, wherein the first condition comprises that the light mixing system is determined to be free of faults according to the fault parameters of the light mixing system, the motor is determined to be free of faults according to the fault parameters of the motor, the start-stop function is determined to be started according to the start-stop function switching parameters, the vehicle speed is zero, the gear is in a forward gear or a reverse gear, the motor torque is higher than a preset start-up threshold, the air conditioner is determined to have no refrigeration or heating requirement according to the operation parameters of the air conditioner, the braking vacuum degree is higher than the preset braking threshold, the residual capacity of the battery is higher than the first preset electric quantity threshold, the water temperature of the engine is higher than the preset water temperature threshold, the first stop trigger condition comprises that the gear is switched to a stop gear or a neutral gear, the first stop mode comprises that the engine is controlled to be stopped, the engine is kept in a closed state, the clutch is kept in a full-on state, and the gear is kept in a stop state.

In an alternative scheme provided in the step S3221, the preset starting threshold, the preset braking threshold, the first preset electric quantity threshold, and the preset water temperature threshold may be standard parameter values corresponding to the motor torque, the braking vacuum, the battery residual capacity, and the engine water temperature when the light hybrid vehicle is in a normal running state, specifically, for example, the preset starting threshold is 50n·m, the preset braking threshold is 0.07MPA, the first preset electric quantity threshold is 36%, and the preset water temperature threshold is 65 ℃, and it is further required to be described herein that the preset starting threshold, the preset braking threshold, the first preset electric quantity threshold, and the preset water temperature threshold may also be parameter values of corresponding parameters determined by a technician based on different working conditions of the light hybrid vehicle.

In the alternative scheme provided by the invention, the air conditioner operation parameters in the multi-dimensional data can also meet the requirement that the air conditioner has an engine starting requirement according to the air conditioner operation parameters when the target start-stop mode of the engine is the first stop-stop mode, but the response time of the engine starting requirement is smaller than the engine starting time threshold (such as 2 s).

As an alternative embodiment, determining, based on the multi-dimensional dataset, that the target start-stop mode to be used is the first stop-stop mode may be as shown in table 1 below:

TABLE 1

In the alternative embodiment, the technical effects that whether the target start-stop mode of the light hybrid vehicle is the first stop mode is comprehensively judged by utilizing the obtained multi-dimensional data (comprising the vehicle speed, the current gear state, the start-stop function switching parameter, the fault parameter of the light hybrid system, the fault parameter of the motor, the torque of the motor, the running parameter of the air conditioner, the braking vacuum degree, the residual capacity of the battery, the water temperature of the engine and the target gear state), the accuracy of the determined target start-stop mode is improved based on the multi-dimensional data, and the accuracy of the first stop control of the engine of the light hybrid vehicle by utilizing the target start-stop mode is further improved, so that the stability of the engine in the first stop is improved, the response time of the engine in the first stop is reduced, and the service life of the engine is prolonged.

In an alternative embodiment, in step S32, determining the target start-stop pattern to be used based on the multi-dimensional dataset further comprises:

and step S3231, wherein under the condition that the multi-dimensional data set meets a second condition, a target start-stop mode is determined to be a second stop-stop mode in response to the fact that the multi-dimensional data set acquired and updated in real time meets a second stop triggering condition, the second condition comprises that no fault exists in a light mixing system according to a fault parameter of the light mixing system, no fault exists in a motor according to a fault parameter of the motor, start-stop function is determined to be started according to a start-stop function switching parameter, the vehicle speed is zero, the gear is in a forward gear or a reverse gear, the motor torque is higher than a preset starting threshold, the air conditioner does not have refrigeration or heating requirements according to an air conditioner operation parameter, the braking vacuum is higher than a preset braking threshold, the battery residual capacity is higher than a first preset electric quantity threshold, the engine water temperature is higher than a preset water temperature threshold, the opening degree of a brake pedal is not at a default value, the second stop triggering condition comprises that the opening degree of the brake pedal is increased to be higher than a preset pressure threshold, the second stop mode comprises that the engine is controlled to stop, the starter and the motor is kept in a closed state, the clutch is kept in a full-on state, and the control gear is kept in the forward gear or the reverse gear.

In an alternative provided in the step S3231, the brake pedal opening may be used to control a running speed of the light hybrid vehicle, and the brake pedal opening may include a full pedal depression, a full pedal release, and a partial pedal depression. The default value may be that the brake pedal opening is a pedal partial (or full) depression. The preset pressure threshold may be a minimum value (e.g., 1200 kPa) of a master cylinder in a normal engine operating state.

As an alternative embodiment, determining, based on the multi-dimensional dataset, that the target start-stop mode to be used is the second stop-stop mode may be as shown in table 2 below:

TABLE 2

In the alternative embodiment, the technical effects that whether the target start-stop mode of the light hybrid vehicle is the second stop mode is comprehensively judged by utilizing the obtained multi-dimensional data (comprising the vehicle speed, the current gear state, the start-stop function switching parameter, the fault parameter of the light hybrid system, the fault parameter of the motor, the torque of the motor, the running parameter of the air conditioner, the braking vacuum degree, the residual capacity of the battery, the water temperature of the engine and the target gear state), the accuracy of the determined target start-stop mode is improved based on the multi-dimensional data, and the accuracy of the second stop control of the engine of the light hybrid vehicle by utilizing the target start-stop mode is further improved, so that the stability of the engine in the second stop is improved, the response time of the engine in the second stop is reduced, and the service life of the engine is prolonged.

Step S3241, wherein in the case that the multi-dimensional data set meets the following third condition, the multi-dimensional data set which is updated in real time is responded to meet a first starting trigger condition, the target starting and stopping mode is determined to be a first stopping starting mode, the third condition comprises that no fault exists in a light mixing system according to the fault parameters of the light mixing system, no fault exists in a motor according to the fault parameters of the motor, starting and stopping functions are determined according to the on-off function switching parameters, the vehicle speed is zero, the gear is in a parking gear or neutral position, the motor torque is higher than a preset starting threshold, the first starting trigger condition is at least one of the following conditions, the air conditioner is determined to have refrigeration or heating requirements according to the running parameters of the air conditioner, the braking vacuum degree is lower than the preset braking threshold, the battery residual capacity is lower than a second preset electric quantity threshold, the opening degree of an accelerator pedal is higher than a preset acceleration threshold, the gear is switched to a forward gear or a reverse gear, the starting and stopping functions are determined to be closed according to the on-off function switching parameters of the light mixing system, the first stopping mode comprises controlling the engine to spray light, keeping the starter to be in a closed state, controlling the motor to be switched to an electric driving state, keeping the clutch to be in a full-on state, and keeping the clutch to be kept in a full-on state, and keeping in the parking gear or in the neutral position.

In an alternative provided in the step S3241, the preset acceleration threshold may be a minimum value preset by a technician for controlling the opening of the corresponding accelerator pedal when the engine is started in the first stop, and the preset braking threshold may be represented in a percentage form (e.g., 2%).

As an alternative embodiment, determining, based on the multi-dimensional dataset, that the target start-stop mode to be used is the first stop-start mode may be as shown in table 3 below:

TABLE 3 Table 3

In the alternative embodiment, the technical effects that whether the target start-stop mode of the light hybrid vehicle is the first stop start-stop mode is comprehensively judged by utilizing the obtained multi-dimensional data (comprising the vehicle speed, the current gear state, the start-stop function switching parameter, the light hybrid system fault parameter, the motor torque, the air conditioner operating parameter, the braking vacuum degree, the battery residual capacity, the engine water temperature and the target gear state) so as to improve the accuracy of the determined target start-stop mode based on the multi-dimensional data and further improve the accuracy of the first stop start-stop control of the engine of the light hybrid vehicle by utilizing the target start-stop mode, thereby improving the stability of the engine in the first stop start-stop process, reducing the response time of the engine in the first stop start-stop process and prolonging the service life of the engine.

In response to the multi-dimensional dataset satisfying the fourth condition that the multi-dimensional dataset satisfies the second start triggering condition, determining that the target start-stop mode is the second stop start mode, wherein the fourth condition comprises determining that the light-mixing system is not in fault according to the fault parameter of the light-mixing system, determining that the motor is not in fault according to the fault parameter of the motor, determining that the start-stop function is started according to the start-stop function switching parameter, the vehicle speed is zero, the gear is in a forward gear or a reverse gear, the motor torque is higher than a preset start threshold, determining that the brake master cylinder pressure is higher than a preset pressure threshold according to the opening degree of a brake pedal, determining that the air conditioner has a refrigerating or heating requirement according to the operation parameter of the air conditioner, determining that the brake vacuum is lower than the preset brake threshold, determining that the residual capacity of a battery is lower than the second preset threshold, determining that the start-stop function is closed according to the start-stop function switching parameter, and the second stop start mode comprises controlling the engine to spray ignition, keeping the starter in a closed state, controlling the motor to switch to an electric drive state, keeping the clutch in a full-on state, and controlling the gear to keep in the forward gear or reverse gear.

As an alternative embodiment, determining, based on the multi-dimensional dataset, that the target start-stop mode to be used is the second stop-start mode may be as shown in table 4 below:

TABLE 4 Table 4

In the alternative embodiment, the technical effects that whether the target start-stop mode of the light hybrid vehicle is the second stop start-stop mode is comprehensively judged by utilizing the obtained multi-dimensional data (comprising the vehicle speed, the current gear state, the start-stop function switching parameter, the light hybrid system fault parameter, the motor torque, the air conditioner operating parameter, the braking vacuum degree, the battery residual capacity, the engine water temperature and the target gear state) so as to improve the accuracy of the determined target start-stop mode based on the multi-dimensional data and further improve the accuracy of performing second stop start-stop control on the engine of the light hybrid vehicle by utilizing the target start-stop mode, thereby improving the stability of the engine during second stop start-stop, reducing the response time of the engine during second stop start-stop and prolonging the service life of the engine.

step S3261, in response to determining that a light-mixing system has a fault according to the fault parameters of the light-mixing system in the multi-dimensional data set, determining that the target start-stop mode is a first fault stop mode, wherein the first fault stop mode comprises the steps of controlling the light-mixing vehicle to start a limp-home mode and generating a system fault message, and the system fault message is used for assisting a driver to carry out parking stop control on the light-mixing vehicle;

step S3262, in response to determining that the motor has a fault or the motor torque is not higher than a preset starting threshold according to the motor fault parameters in the multi-dimensional data set, determining that the target starting and stopping mode is a second fault stopping mode, wherein the second fault stopping mode comprises the steps of controlling a starter to switch to an on state, receiving a fault grade signal corresponding to the motor, and controlling the starter to start the engine according to the fault grade signal.

In an alternative provided by the steps S3261 to S3262, the limp mode may be that when an electronic control unit (Electronic Control Unit, ECU) in an electronic control unit (Electronic Control Unit) of a light-hybrid vehicle fails, the ECU automatically enables a backup control loop to simply control the engine, so that the vehicle can travel to a target site (such as a vehicle repair shop) for repairing the failure. The system fault message can be presented to the user in a text form through the vehicle-mounted display screen, can be played to the user in a voice form by utilizing the vehicle-mounted voice equipment, and can be presented to the user by utilizing the fault warning lamp.

In an alternative solution provided in the foregoing steps S3261 to S3262, the fault level signals may be used to characterize the severity of the different types of motor faults, specifically, for example, the fault level signals include, in order from high to low, a first level, a second level, a third level, and a fourth level, where the fault type corresponding to the first level fault level signal may be an overcurrent fault occurring on the dc bus of the motor controller 206 shown in fig. 2, the fault type corresponding to the second level fault level signal may be a phase current overcurrent of the motor controller 206 shown in fig. 2 (or a node of the BSG motor 215 is lost), the fault type corresponding to the third level fault level signal may be an overspeed protection occurring on the motor controller 206 shown in fig. 2, and the fault type corresponding to the fourth level fault level signal may be a dc undervoltage fault occurring on the motor controller 206 shown in fig. 2.

In the alternative embodiment, the method has the advantages that the accuracy of judging the target fault stopping mode is improved by accurately determining the target fault stopping mode (the first fault stopping mode and the second fault stopping mode) based on different fault parameters (the fault parameters of the light mixing system and the fault parameters of the motor), the start-stop mode of the engine when the light mixing system of the light mixing vehicle is in a normal state is considered, the fault stopping mode of the engine when the light mixing system is in a fault state is considered, and accordingly the integrity of start-stop control of the engine of the light mixing vehicle is improved, the response time of the engine in fault stopping is shortened, and the service life of the engine is prolonged.

Fig. 5 is a block diagram showing the structure of an engine start-stop control apparatus for a light-hybrid vehicle according to an embodiment of the present invention, as shown in fig. 5, the apparatus comprising:

an acquisition module 501 configured to acquire a multi-dimensional data set of the light-hybrid vehicle, where the multi-dimensional data set is used to characterize a real-time running state and a fault state of the light-hybrid vehicle;

a determining module 502, configured to determine a target start-stop mode to be used based on the multi-dimensional dataset;

a control module 503, configured to control the engine of the light hybrid vehicle to start or stop according to a target start-stop mode.

Optionally, the acquisition module 501 is further configured to obtain a multi-dimensional data set including a vehicle speed, a gear, a motor torque, an air conditioner operation parameter, a brake vacuum, an accelerator pedal opening, a brake pedal opening, a battery remaining capacity, an engine water temperature, a key status, a start-stop function switch parameter, a light-mix system fault parameter, and a motor fault parameter.

Optionally, the determining module 502 is further configured to determine whether the light-mix vehicle starts up for the first time in the current driving task according to the key state and the driving cycle count value of the light-mix vehicle, and determine a target start-stop mode to be used based on the multi-dimensional data set in response to the light-mix vehicle starting up for the first time.

Optionally, the determining module 502 is further configured to determine that the target start-stop mode is a first parking mode in response to the multi-dimensional data set acquired and updated in real time satisfying a first parking trigger condition, where the first condition includes determining that the light-mixing system is not faulty according to a fault parameter of the light-mixing system, determining that the motor is not faulty according to a motor fault parameter, determining that a start-stop function is on according to a start-stop function switching parameter, a vehicle speed is zero, a gear is in a forward gear or a reverse gear, a motor torque is higher than a preset start-up threshold, determining that the air conditioner is not in a cooling or heating requirement according to an air conditioner operation parameter, a braking vacuum is higher than a preset braking threshold, a battery residual capacity is higher than a first preset charge threshold, an engine water temperature is higher than a preset water temperature threshold, the first parking trigger condition includes that the gear is switched to a parking gear or a neutral gear, and the first parking mode includes controlling the engine to be fuel-cut, maintaining the starter and the motor to be in a closed state, maintaining the clutch to be in a full-on state, and controlling the gear to be maintained in the parking or neutral.

Optionally, the determining module 502 is further configured to determine that the target start-stop mode is a second stop-stop mode in response to the multi-dimensional dataset acquired and updated in real time satisfying a second stop trigger condition when the multi-dimensional dataset satisfies a second condition, wherein the second condition includes determining that the light-mixing system has no fault according to a fault parameter of the light-mixing system, determining that the motor has no fault according to a fault parameter of the motor, determining that the start-stop function is on according to a start-stop function switch parameter, the vehicle speed is zero, the gear is in a forward gear or a reverse gear, the motor torque is higher than a preset start-up threshold, determining that the air conditioner has no refrigeration or heating requirement according to an air conditioner operation parameter, the brake vacuum is higher than a preset brake threshold, the battery residual capacity is higher than a first preset electric quantity threshold, the engine water temperature is higher than a preset water temperature threshold, the brake pedal opening is not at a default value, the second stop trigger condition includes increasing the brake pedal opening to a brake master cylinder pressure threshold, the second stop mode includes controlling the engine to stop, maintaining the starter and the motor in a closed state, maintaining the clutch in an on state, and controlling the forward gear or reverse gear to be maintained.

Optionally, the determining module 502 is further configured to determine that the target start-stop mode is a first stop start mode in response to the multi-dimensional dataset acquired and updated in real time satisfying a third condition that the multi-dimensional dataset satisfies a first start trigger condition, the third condition includes determining that the light-mixing system has no fault according to a fault parameter of the light-mixing system, determining that the motor has no fault according to a motor fault parameter, determining that a start-stop function is on according to a start-stop function switch parameter, the vehicle speed is zero, the gear is in a stop gear or neutral position, the motor torque is higher than a preset start threshold, the first start trigger condition is at least one of determining that a cooling or heating requirement exists according to an air conditioner operation parameter, the braking vacuum is lower than a preset braking threshold, the remaining battery capacity is lower than a second preset electric quantity threshold, the accelerator pedal opening is greater than a preset acceleration threshold, the gear is switched to a forward gear or a reverse gear, determining that the start-stop function is off according to the start-stop function switch parameter, the first start-stop start mode includes controlling the fuel injection, the starter to be kept in a closed state, controlling the motor to be switched to an electric drive state, the clutch to be kept in a full-on state, and kept in a full-stop gear or a stop gear is kept in a full-on state.

Optionally, the determining module 502 is further configured to determine that the target start-stop mode is the second stop start-stop mode in response to the multi-dimensional dataset acquired and updated in real time satisfying a fourth condition that the multi-dimensional dataset satisfies a second start-stop trigger condition, the fourth condition includes determining that the light-mixing system has no fault according to a fault parameter of the light-mixing system, determining that the motor has no fault according to a fault parameter of the motor, determining that the start-stop function is on according to a start-stop function switching parameter, the vehicle speed is zero, the gear is in a forward gear or a reverse gear, the motor torque is higher than a preset start-stop threshold, determining that the master cylinder pressure is greater than a preset pressure threshold according to a brake pedal opening, the second start-stop trigger condition is at least one of determining that the air conditioner has a refrigeration or heating requirement according to an air conditioner operation parameter, the brake vacuum is lower than a preset brake threshold, the battery remaining capacity is lower than a second preset electric quantity threshold, determining that the start-stop function is off according to the start-stop function switching parameter, controlling the engine to spray-fire, controlling the starter to be in a closed state, controlling the motor to be switched to an electric drive state, controlling the motor to be in a full-on state, and controlling the clutch to be kept in the forward gear or reverse gear.

Optionally, the determining module 502 is further configured to determine, in response to determining that a fault exists in the light-hybrid system according to a fault parameter of the light-hybrid system in the multi-dimensional data set, that the target start-stop mode is a first fault stop mode, where the first fault stop mode includes controlling the light-hybrid vehicle to start a limp-home mode and generating a system fault message, where the system fault message is used to assist a driver in performing stop control on the light-hybrid vehicle, and in response to determining that a fault exists in the motor or that a torque of the motor is not higher than a preset start-up threshold according to a fault parameter of the motor in the multi-dimensional data set, determine that the target start-stop mode is a second fault stop mode, where the second fault stop mode includes controlling a starter to switch to an on state, receiving a fault level signal corresponding to the motor, and controlling the starter to start the engine according to the fault level signal.

It should be noted that each of the above modules may be implemented by software or hardware, and the latter may be implemented by, but not limited to, the above modules all being located in the same processor, or each of the above modules being located in different processors in any combination.

Alternatively, in the present embodiment, the above-described in-vehicle processor may be configured to execute the following steps by a computer program:

step S1, acquiring a multi-dimensional data set of the light-weight hybrid vehicle, wherein the multi-dimensional data set is used for representing the real-time running state and the fault state of the light-weight hybrid vehicle;

step S2, determining a target start-stop mode to be used based on a multi-dimensional data set;

and step S3, controlling the engine of the light hybrid vehicle to start or stop according to the target start-stop mode.

Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and alternative implementations thereof, and this embodiment is not described herein.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

In the several embodiments provided in the present invention, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. The storage medium includes various media capable of storing program codes, such as a U disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. A method for starting and stopping an engine of a mild hybrid vehicle, comprising:

Acquire a multidimensional data set of the mild hybrid vehicle, wherein the multidimensional data set is used to characterize the real-time operating state and fault state of the mild hybrid vehicle, and the multidimensional data set includes: vehicle speed, gear position, motor torque, air conditioning operating parameters, brake vacuum, accelerator pedal opening, brake pedal opening, battery remaining capacity, engine water temperature, key status, start-stop function switch parameters, mild hybrid system fault parameters, and motor fault parameters;

determining, according to the key state and the driving cycle count value of the mild hybrid vehicle, whether the mild hybrid vehicle is started for the first time in a current driving task; and determining, in response to the first start of the mild hybrid vehicle, a target start-stop mode to be used based on the multi-dimensional data set;

The engine of the mild hybrid vehicle is controlled to start or stop according to the target start-stop mode.

2. The engine start-stop control method according to claim 1, characterized in that determining the target start-stop mode to be used based on the multi-dimensional data set comprises:

In the case where the multidimensional data set satisfies the following first condition, in response to the multidimensional data set collected and updated in real time satisfying the first shutdown trigger condition, the target start-stop mode is determined to be the first stop-stop mode, wherein:

The first condition includes: determining that the mild hybrid system has no fault according to the mild hybrid system fault parameter, determining that the motor has no fault according to the motor fault parameter, determining that the start-stop function is turned on according to the start-stop function switch parameter, the vehicle speed is zero, the gear is in the forward gear or the reverse gear, the motor torque is higher than the preset start threshold, determining that the air conditioner has no cooling or heating demand according to the air conditioner operation parameter, the brake vacuum is higher than the preset brake threshold, the battery remaining capacity is higher than the first preset power threshold, and the engine water temperature is higher than the preset water temperature threshold;

The first shutdown trigger condition includes: the gear is switched to the parking gear or the neutral gear; the first parking shutdown method includes: controlling the engine to shut down by cutting off fuel, keeping the starter and the motor in the off state, keeping the clutch in the fully open state, and controlling the gear to remain in the parking gear or the neutral gear.

3. The engine start-stop control method according to claim 1, characterized in that determining the target start-stop mode to be used based on the multi-dimensional data set further comprises:

In the case where the multidimensional data set satisfies the following second condition, in response to the multidimensional data set collected and updated in real time satisfying the second shutdown trigger condition, determining that the target start-stop mode is the second stop-stop mode;

The second condition includes: determining that the mild hybrid system has no fault according to the mild hybrid system fault parameter, determining that the motor has no fault according to the motor fault parameter, determining that the start-stop function is turned on according to the start-stop function switch parameter, the vehicle speed is zero, the gear is in the forward gear or the reverse gear, the motor torque is higher than the preset start threshold, determining that the air conditioner has no cooling or heating demand according to the air conditioner operation parameter, the brake vacuum is higher than the preset brake threshold, the battery remaining capacity is higher than the first preset power threshold, the engine water temperature is higher than the preset water temperature threshold, and the brake pedal opening is not at the default value;

The second shutdown triggering condition includes: the brake pedal opening increases until the brake master cylinder pressure is greater than a preset pressure threshold;

The second parking and stopping mode includes: controlling the engine to shut down by cutting off fuel, keeping the starter and the motor in a closed state, keeping the clutch in a fully open state, and controlling the gear to remain in a forward gear or a reverse gear.

4. The engine start-stop control method according to claim 1, characterized in that determining the target start-stop mode to be used based on the multi-dimensional data set further comprises:

In the case where the multidimensional data set satisfies the following third condition, in response to the multidimensional data set collected and updated in real time satisfying the first start trigger condition, determining the target start-stop mode to be the first stop-start mode;

The third condition includes: determining that the mild hybrid system has no fault according to the mild hybrid system fault parameter, determining that the motor has no fault according to the motor fault parameter, determining that the start-stop function is turned on according to the start-stop function switch parameter, the vehicle speed is zero, the gear is in the parking gear or neutral gear, and the motor torque is higher than a preset starting threshold;

The first start triggering condition is to meet at least one of the following conditions: determining that the air conditioner has cooling or heating demand according to the air conditioner operation parameters, the brake vacuum is lower than a preset brake threshold, the battery remaining capacity is lower than a second preset power threshold, the accelerator pedal opening is greater than a preset acceleration threshold, and determining that the start-stop function is turned off according to the start-stop function switch parameters;

The first parking-starting method includes: controlling the engine fuel injection and ignition, keeping the starter in an off state, controlling the motor to switch to an electric drive state, keeping the clutch in a fully open state, and controlling the gear to remain in a parking gear or a neutral gear.

5. The engine start-stop control method according to claim 1, characterized in that determining the target start-stop mode to be used based on the multi-dimensional data set further comprises:

In the case where the multidimensional data set satisfies the following fourth condition, in response to the multidimensional data set collected and updated in real time satisfying the second start trigger condition, determining that the target start-stop mode is the second stop-start mode;

The fourth condition includes: determining that the mild hybrid system has no fault according to the mild hybrid system fault parameter, determining that the motor has no fault according to the motor fault parameter, determining that the start-stop function is turned on according to the start-stop function switch parameter, the vehicle speed is zero, the gear is in the forward gear or the reverse gear, the motor torque is higher than the preset starting threshold, and determining that the brake master cylinder pressure is greater than the preset pressure threshold according to the brake pedal opening;

The second start triggering condition is to meet at least one of the following conditions: determining that the air conditioner has cooling or heating demand according to the air conditioner operation parameters, the brake vacuum is lower than a preset brake threshold, the battery remaining capacity is lower than a second preset power threshold, and determining that the start-stop function is turned off according to the start-stop function switch parameters;

The second stop-start method includes: controlling the engine fuel injection and ignition, keeping the starter in an off state, controlling the motor to switch to an electric drive state, keeping the clutch in a fully open state, and controlling the gear to remain in a forward gear or a reverse gear.

6. The engine start-stop control method according to claim 1, characterized in that determining the target start-stop mode to be used based on the multi-dimensional data set further comprises:

In response to determining that a mild hybrid system has a fault according to the mild hybrid system fault parameter in the multi-dimensional data set, determining that the target start-stop mode is a first fault stop mode, wherein the first fault stop mode includes: controlling the mild hybrid vehicle to start a limp home mode and generating a system fault message, wherein the system fault message is used to assist a driver in performing parking control on the mild hybrid vehicle;

In response to determining that a motor fault exists or that the motor torque is not higher than a preset starting threshold according to the motor fault parameters in the multidimensional data set, the target start-stop mode is determined to be a second fault stop mode, wherein the second fault stop mode includes: controlling the starter to switch to an on state, receiving a fault level signal corresponding to the motor, and controlling the starter to start the engine according to the fault level signal.

7. An engine start-stop control device for a mild hybrid vehicle, comprising:

an acquisition module, for acquiring a multi-dimensional data set of the mild hybrid vehicle, wherein the multi-dimensional data set is used to characterize the real-time operating state and fault state of the mild hybrid vehicle, and the multi-dimensional data set includes: vehicle speed, gear position, motor torque, air conditioning operating parameters, brake vacuum, accelerator pedal opening, brake pedal opening, battery remaining capacity, engine water temperature, key status, start-stop function switch parameters, mild hybrid system fault parameters, and motor fault parameters;

a determination module, configured to determine whether the mild hybrid vehicle is started for the first time in a current driving task according to the key state and the driving cycle count value of the mild hybrid vehicle; and in response to the first start of the mild hybrid vehicle, determine a target start-stop mode to be used based on the multi-dimensional data set;

A control module is used to control the engine of the mild hybrid vehicle to start or stop according to the target start-stop mode.

8. A mild hybrid vehicle, characterized in that it comprises an on-board memory and an on-board processor, wherein a computer program is stored in the on-board memory, and the on-board processor is configured to run the computer program to execute the engine start-stop control method of the mild hybrid vehicle according to any one of claims 1 to 6.