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CN113844431B - Power system control method, device, equipment and medium of hybrid electric vehicle - Google Patents

Power system control method, device, equipment and medium of hybrid electric vehicle Download PDF

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Publication number
CN113844431B
CN113844431B CN202111150397.9A CN202111150397A CN113844431B CN 113844431 B CN113844431 B CN 113844431B CN 202111150397 A CN202111150397 A CN 202111150397A CN 113844431 B CN113844431 B CN 113844431B
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Prior art keywords
mode
natural gas
power system
battery
threshold
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CN202111150397.9A
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CN113844431A (en
Inventor
唐为义
周重光
赵天恩
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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Priority to CN202111150397.9A priority Critical patent/CN113844431B/en
Publication of CN113844431A publication Critical patent/CN113844431A/en
Priority to PCT/CN2022/077068 priority patent/WO2023050688A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B60W20/16—Control strategies specially adapted for achieving a particular effect for reducing engine exhaust emissions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The disclosure provides a power system control method, a device, equipment and a medium of a hybrid electric vehicle, and belongs to the field of vehicle safety control. The power system of the hybrid electric vehicle is provided with a battery mode, a natural gas mode and a gasoline mode, and the method comprises the following steps: acquiring the electric quantity of a battery; in response to determining that the amount of power is less than the first power threshold, obtaining an engine coolant temperature and a natural gas cylinder pressure; and controlling the power system to operate in the natural gas mode or the gasoline mode according to the engine coolant temperature and the natural gas cylinder pressure. That is, in the embodiment of the present disclosure, when the electric quantity of the battery is insufficient, the power system of the hybrid electric vehicle is controlled to operate in the natural gas mode or the gasoline mode, so that the exhaust emission of the hybrid electric vehicle in the use process can be reduced.

Description

Power system control method, device, equipment and medium of hybrid electric vehicle
Technical Field
The present disclosure relates to the field of automotive technologies, and in particular, to a method, an apparatus, a device, and a medium for controlling a powertrain of a hybrid vehicle.
Background
The power system of the hybrid electric vehicle comprises a battery and an engine. The vehicle control unit may employ a battery and/or an engine to power the start or operation of the hybrid vehicle, depending on the operating state of the hybrid vehicle.
Disclosure of Invention
The embodiment of the disclosure provides a method, a device, equipment and a medium for controlling a power system of a hybrid electric vehicle, which can reduce the exhaust emission of the hybrid electric vehicle. The technical scheme is as follows:
in a first aspect, a method for controlling a power system of a hybrid vehicle, the power system of the hybrid vehicle having a battery mode, a natural gas mode and a gasoline mode, the method comprising: acquiring the electric quantity of a battery; in response to determining that the amount of power is less than a first power threshold, obtaining an engine coolant temperature and a natural gas cylinder pressure; and controlling the power system to operate in the natural gas mode or the gasoline mode according to the temperature of the engine coolant and the pressure of the natural gas bottle.
Optionally, said controlling said power system to operate in a natural gas mode or a gasoline mode based on said engine coolant temperature and said natural gas cylinder pressure comprises: controlling the powertrain to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold; alternatively, the power system is controlled to operate the gasoline mode in response to determining that the engine coolant temperature is less than a temperature threshold or the natural gas cylinder pressure is less than a pressure threshold.
Optionally, after controlling the power system to the natural gas mode, the method further comprises: controlling an engine to charge the battery; controlling the power system to operate the battery mode in response to determining that the charge is greater than or equal to the first charge threshold.
Optionally, after controlling the power system to operate in the gasoline mode, the method further comprises: controlling the powertrain to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than the pressure threshold; controlling the engine to charge the battery; controlling the power system to operate the battery mode in response to determining that the charge is greater than or equal to the first charge threshold.
Optionally, after controlling the power system to operate in the gasoline mode, the method further comprises: controlling the engine to charge the battery; controlling the power system to operate the battery mode in response to determining that the battery charge is greater than the first charge threshold.
In a second aspect, there is provided a power system control apparatus of a hybrid vehicle having a battery mode, a natural gas mode, and a gasoline mode, the apparatus comprising: the acquisition module is used for acquiring the electric quantity of the battery; in response to determining that the amount of power is less than a first power threshold, obtaining an engine coolant temperature and a natural gas cylinder pressure; and the control module is used for controlling the power system to operate in the natural gas mode or the gasoline mode according to the temperature of the engine coolant and the pressure of the natural gas cylinder.
Optionally, the control module is to control the power system to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold; alternatively, the power system is controlled to operate the gasoline mode in response to determining that the engine coolant temperature is less than a temperature threshold or the natural gas cylinder pressure is less than a pressure threshold.
Optionally, after controlling the power system to operate in the natural gas mode, the control module is further configured to control an engine to charge the battery; controlling the power system to operate the battery mode in response to determining that the charge is greater than or equal to the first charge threshold.
Optionally, after controlling the power system to operate in the gasoline mode, the control module is further configured to control the power system to operate in the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than the pressure threshold; controlling the engine to charge the battery; controlling the power system to operate the battery mode in response to determining that the charge is greater than or equal to the first charge threshold.
Optionally, after controlling the power system to operate in the gasoline mode, the control module is further configured to control the engine to charge the battery; controlling the power system to operate the battery mode in response to determining that the battery charge is greater than the first charge threshold.
In a third aspect, a computer device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the method of the first aspect.
In a fourth aspect, a computer-readable medium is provided, in which instructions, when executed by a processor of a computer device, enable the computer device to perform the method of the first aspect.
In a fifth aspect, there is provided a computer program product comprising computer programs/instructions, characterized in that the computer programs/instructions, when executed by a processor, implement the method of the first aspect.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
in the disclosed embodiment, the power system of the hybrid electric vehicle has a battery mode, a natural gas mode, and a gasoline mode. In response to determining that the charge of the battery is less than a first charge threshold, obtaining an engine coolant temperature and a natural gas cylinder pressure; and controlling the power system to operate in a natural gas mode or a gasoline mode according to the temperature of the engine coolant and the pressure of the natural gas cylinder. That is, in the embodiment of the present disclosure, when the electric quantity of the battery is insufficient, the power system of the hybrid electric vehicle is controlled to operate in the natural gas mode or the gasoline mode. Because the exhaust emission of the battery mode is 0 and is less than the exhaust emission of the natural gas mode and the exhaust emission of the gasoline, the exhaust emission of the hybrid electric vehicle in the use process can be reduced by adopting the control method of the power system provided by the embodiment of the disclosure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for controlling a powertrain of a hybrid vehicle according to an embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating another method for controlling a powertrain of a hybrid vehicle according to an embodiment of the present disclosure;
FIG. 3 is a flowchart illustrating another powertrain control method for a hybrid vehicle according to an embodiment of the present disclosure;
FIG. 4 is a flowchart illustrating another powertrain control method for a hybrid vehicle according to an embodiment of the present disclosure;
FIG. 5 is a flowchart illustrating a powertrain control method of another hybrid vehicle according to an embodiment of the present disclosure;
FIG. 6 is a block diagram illustrating an exemplary embodiment of a control apparatus for a hybrid vehicle;
fig. 7 is a block diagram of a computer device according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
In the embodiment of the disclosure, the power system of the hybrid electric vehicle comprises a battery and an engine. The power system has a battery mode, a natural gas mode, and a gasoline mode. The hybrid vehicle may be a plug-in hybrid vehicle and an oil-electric hybrid vehicle, for example.
The battery mode is also called a pure electric mode, and means that the power system provides power for the hybrid electric vehicle through the battery.
The natural gas mode and the gasoline mode are engine operating modes. The natural gas mode refers to the power system combusting natural gas by the engine to power the hybrid vehicle. In some examples, the Natural Gas may be CNG (Compressed Natural Gas), which is Natural Gas in gaseous form; in other examples, the Natural Gas may be LNG (Liquefied Natural Gas), which is Natural Gas in liquid form. Gasoline mode refers to the powertrain system combusting gasoline to power the hybrid vehicle via the engine.
In the related art, a method for controlling a powertrain of a hybrid vehicle includes: controlling the power system to be in a natural gas mode or a gasoline mode; receiving a command signal to change the powertrain; the power system is controlled to a battery mode during the switching in response to the command signal indicating a switch from the natural gas mode to the gasoline mode or from the gasoline mode to the natural gas mode.
And the mode that the power system is controlled to be in the battery mode during the switching period of switching the natural gas mode into the gasoline mode or switching the gasoline mode into the natural gas mode is controlled, so that the exhaust emission is high.
Fig. 1 is a flowchart of a method for controlling a powertrain of a hybrid vehicle, which may be executed by a vehicle controller and used for controlling the powertrain to provide power during start-up or operation of the hybrid vehicle according to an embodiment of the present disclosure. Referring to fig. 1, the method includes:
in step 101, the charge of the battery is acquired.
In the embodiment of the disclosure, the vehicle controller periodically obtains the battery power to determine whether the hybrid vehicle can operate in the battery mode according to the battery power.
For example, the vehicle Controller may obtain the Battery level through a vehicle Area Network (CAN) communication with a Battery Management System (BMS).
In step 102, in response to determining that the battery charge is less than the first charge threshold, an engine coolant temperature and a natural gas cylinder pressure are obtained.
The first charge threshold value represents the lowest charge value that the battery can power the hybrid vehicle, and is determined experimentally by a skilled person and then stored in the vehicle controller. When the electric quantity of the battery is greater than or equal to the first electric quantity threshold value, the power system is indicated to meet the battery mode operation condition, namely, the electric quantity of the battery can provide power for the hybrid electric vehicle. When the battery capacity is less than the first capacity threshold, it indicates that the power system does not satisfy the battery mode operation condition, that is, the battery capacity is insufficient to provide power for the hybrid electric vehicle.
In the disclosed embodiment, the vehicle controller periodically obtains the engine coolant temperature and the natural gas cylinder pressure. In some embodiments, a temperature sensor is provided at the inside of the engine for detecting the engine coolant temperature, and the vehicle controller may acquire the engine coolant temperature through the temperature sensor. The pressure sensor is arranged inside the natural gas bottle and used for detecting the pressure inside the natural gas bottle, and the vehicle controller can acquire the pressure of the natural gas bottle through the pressure sensor.
In step 103, the power system is controlled to operate in a natural gas mode or a gasoline mode according to the temperature of the engine coolant and the pressure of the natural gas cylinder.
In the disclosed embodiment, when the power system does not meet the operating conditions of the battery mode, the power system is controlled to provide power according to the temperature of the engine coolant and the pressure of the natural gas cylinder.
In some embodiments, step 103 comprises: in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than or equal to the pressure threshold, controlling the power system to operate in the natural gas mode.
In other embodiments, step 103 comprises: the method further includes controlling the power system to operate in the gasoline mode in response to determining that the engine coolant temperature is less than the temperature threshold or the natural gas cylinder pressure is less than the pressure threshold.
Wherein the temperature threshold value represents the lowest temperature value at which the natural gas can be sufficiently combusted. When the temperature of the engine coolant is lower than the temperature threshold value, the natural gas cannot be combusted due to the low temperature; or insufficient combustion due to low temperature, resulting in an increase in the amount of exhaust emissions.
The pressure threshold represents the lowest pressure value at which the power system is capable of operating in the natural gas mode. The pressure of the natural gas bottle can reflect the residual amount of the natural gas in the natural gas bottle. The higher the pressure of the natural gas bottle is, the higher the residual amount of the natural gas is; the lower the natural gas cylinder pressure, the lower the natural gas residual amount.
For example, the temperature threshold and the pressure threshold are determined experimentally by a person skilled in the art and then stored in a memory unit of the vehicle controller.
When the temperature of the engine coolant is greater than or equal to a temperature threshold value and the pressure of the natural gas cylinder is greater than or equal to a pressure threshold value, the power system is indicated to meet the natural gas mode operation condition. At this time, the power system is controlled to operate in the natural gas mode. Because the tail gas emission of the engine burning natural gas is less than that of the engine burning gasoline, when the power system does not meet the battery mode operation condition, the tail gas emission can be reduced to a certain extent by controlling the power system to operate the natural gas mode.
The engine coolant temperature is less than the temperature threshold or the natural gas cylinder pressure is less than the pressure threshold, which includes the following three conditions: the temperature of the engine coolant is less than a temperature threshold value, and the pressure of the natural gas bottle is greater than or equal to a pressure threshold value; the temperature of the engine coolant is greater than or equal to a temperature threshold value, and the pressure of the natural gas cylinder is less than a pressure threshold value; the temperature of the engine coolant is smaller than a temperature threshold value, and the pressure of the natural gas cylinder is smaller than a pressure threshold value. When any of the three conditions are met, it is an indication that the power system is not meeting the natural gas mode operating conditions. At this time, the power system is controlled to operate in the gasoline mode. That is, the power system is controlled to operate in the gasoline mode only when the battery mode operating condition is not satisfied and the natural gas mode operating condition is not satisfied.
In the disclosed embodiment, the power system of the hybrid electric vehicle has a battery mode, a natural gas mode, and a gasoline mode. In response to determining that the charge of the battery is less than a first charge threshold, obtaining an engine coolant temperature and a natural gas cylinder pressure; and controlling the power system to operate in a natural gas mode or a gasoline mode according to the temperature of the engine coolant and the pressure of the natural gas cylinder. That is, in the embodiment of the present disclosure, when the electric quantity of the battery is insufficient, the power system of the hybrid electric vehicle is controlled to operate in the natural gas mode or the gasoline mode. Because the exhaust emission of the battery mode is 0 and is less than the exhaust emission of the natural gas mode and the exhaust emission of the gasoline, the exhaust emission of the hybrid electric vehicle in the use process can be reduced by adopting the control method of the power system provided by the embodiment of the disclosure.
Optionally, in an embodiment of the present disclosure, the method for controlling a powertrain of a hybrid vehicle further includes: after controlling the power system to operate in the natural gas mode, controlling the engine to charge the battery; in response to determining that the charge is greater than or equal to the first charge threshold, the power system is controlled to operate in the battery mode.
Because the tail gas emission amount in the battery mode is 0, the power system charges the battery in the natural gas mode after operating in the natural gas mode. When the power system meets the battery mode operation condition again, the power system is controlled to operate in the battery mode, and the exhaust emission of the hybrid electric vehicle in the operation process can be further reduced.
Optionally, in an embodiment of the present disclosure, the method for controlling a powertrain of a hybrid vehicle further includes: after controlling the power system to operate in the gasoline mode, controlling the power system to operate in the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than the pressure threshold; controlling the engine to charge the battery; in response to determining that the charge is greater than or equal to the first charge threshold, the power system is controlled to operate in the battery mode.
Since the exhaust emission of the battery mode is 0, and the exhaust emission of the natural gas mode is smaller than that of the gasoline mode. After the gasoline mode is operated, if the power system meets the operating condition of the natural gas mode, the power system is controlled to operate the natural gas mode, and the battery is charged in the natural gas mode. When the power system meets the battery mode operation condition again, the power system is controlled to operate the battery mode, and the exhaust emission of the hybrid electric vehicle in the operation process can be further reduced.
Optionally, in an embodiment of the present disclosure, the method for controlling a powertrain of a hybrid electric vehicle further includes: after controlling the power system to operate in the gasoline mode, controlling the engine to charge the battery; the method also includes controlling the power system to operate in the battery mode in response to determining that the battery charge is greater than the first charge threshold.
Since the exhaust emission of the battery mode is 0, the power system charges the battery in the gasoline mode after operating in the gasoline mode. When the power system meets the battery mode operation condition again, the power system is controlled to operate the battery mode, and the exhaust emission of the hybrid electric vehicle in the operation process can be further reduced.
Fig. 2 is a flowchart of a method for controlling a powertrain of a hybrid vehicle, which may be executed by a vehicle controller and used for controlling the powertrain to provide power during a start-up process of the hybrid vehicle according to an embodiment of the disclosure. Referring to fig. 2, the method includes:
in step 201, the charge level of the battery is acquired.
The relevant content of the battery capacity is obtained, see the foregoing step 101, and the detailed description is omitted here.
In step 202, it is determined whether the amount of power is greater than or equal to a first power threshold. If the power amount is greater than or equal to the first power amount threshold, step 205 is performed. If the amount of power is less than the first power threshold, step 203 is performed.
The content of the first power threshold, referred to as the aforementioned step 102, is omitted here.
And when the electric quantity of the battery is greater than or equal to the first electric quantity threshold value, the power system meets the running condition of the battery mode, and the electric quantity of the battery is enough to start the hybrid electric vehicle. And when the electric quantity of the battery is less than the first electric quantity threshold value, the power system does not meet the running condition of the battery mode, and the electric quantity of the battery is not enough to start the hybrid electric vehicle.
In step 203, engine coolant temperature and natural gas cylinder pressure are obtained.
The relevant contents of the engine coolant temperature and the natural gas cylinder pressure are obtained, see the aforementioned step 102, and a detailed description is omitted here.
In step 204, it is determined whether the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold. If the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than or equal to the pressure threshold, step 206 is performed. If the engine coolant temperature is less than the temperature threshold or the natural gas cylinder pressure is less than the pressure threshold, step 207 is performed.
When the temperature of the engine coolant is greater than or equal to the temperature threshold value and the pressure of the natural gas cylinder is greater than or equal to the pressure threshold value, the power system meets the natural gas mode operation condition, and the power system can be controlled to operate the natural gas mode to start the hybrid electric vehicle.
When the engine coolant temperature is less than the temperature threshold or the natural gas cylinder pressure is less than the pressure threshold, it indicates that the power system does not meet the operating conditions of the natural gas mode. At this time, the power system may be controlled to operate in the gasoline mode to start the hybrid vehicle. The temperature threshold, the pressure threshold, and the related contents that the temperature of the engine coolant is less than the temperature threshold or the pressure of the natural gas cylinder is less than the pressure threshold are referred to in the foregoing step 103, and the detailed description is omitted here.
In step 205, the power system is controlled to operate in a battery mode.
In step 206, control operates the power system in the natural gas mode.
In step 207, control operates the powertrain in a gasoline mode.
In the embodiment of the disclosure, in the starting process of the hybrid electric vehicle, when the power system meets the battery mode operation condition, the power system is controlled to operate the battery mode so as to start the hybrid electric vehicle; when the power system does not meet the battery mode operation condition and the power system meets the natural gas mode operation condition, controlling the power system to operate a natural gas mode to start the hybrid electric vehicle; and when the power system does not meet the battery mode operation condition and also does not meet the natural gas mode operation condition, controlling the power system to operate a gasoline mode to start the hybrid electric vehicle. That is, in the embodiment of the present disclosure, the power system is controlled to provide power during the starting process of the hybrid electric vehicle according to the priority order of the battery mode greater than the natural gas mode and the natural gas mode greater than the gasoline mode. The battery mode is 0 exhaust emission, and the exhaust emission of the natural gas mode is smaller than that of the gasoline mode, so that the exhaust emission of the hybrid electric vehicle in the starting process can be reduced according to the control method of the power system.
Fig. 3 is a flowchart of a method for controlling a powertrain of a hybrid vehicle, which may be executed by a vehicle controller and is configured to control the powertrain to provide power after the hybrid vehicle is started in a gasoline mode according to an embodiment of the disclosure. Referring to fig. 3, the method includes:
in step 301, the power system is controlled to operate in a gasoline mode.
As can be seen from the embodiment shown in fig. 2, the hybrid vehicle is started by controlling the power system to operate in the gasoline mode only when the power system does not satisfy the battery mode operation condition and does not satisfy the natural gas mode operation condition. Therefore, in the embodiment of the disclosure, after the hybrid electric vehicle is started in the gasoline mode, the power system is controlled to operate in the gasoline mode to provide the hybrid electric vehicle with the operation power.
In step 302, the power system is controlled to charge the battery.
When the power system operates in the natural gas mode, the battery is charged in the natural gas mode; when the power system operates in the gasoline mode, the battery is charged through the gasoline mode.
In step 303, the battery power, engine coolant temperature, and natural gas cylinder pressure are obtained.
The related contents of acquiring the electric quantity of the battery refer to the aforementioned step 101, and the related contents of acquiring the engine coolant temperature and the natural gas cylinder pressure refer to the aforementioned step 102, and a detailed description thereof is omitted.
In step 304, it is determined whether the charge level of the battery is greater than or equal to a first charge level threshold. If the charge of the battery is greater than or equal to the first charge threshold, the power system satisfies the battery mode operating condition, and step 307 is executed; if the charge level of the battery is less than the first charge level threshold, the power system does not satisfy the battery mode operating condition and step 305 is executed.
The content of the first power threshold, referred to as the aforementioned step 102, is omitted here.
Optionally, in this embodiment of the present disclosure, step 304 may also be replaced with:
in step 3041, it is determined whether the charge level of the battery is greater than a first charge level threshold. If the charge of the battery is greater than or equal to the first charge threshold, go to step 307; if the charge of the battery is less than the first charge threshold, step 3042 is performed.
In step 3042, it is determined whether the power of the battery is greater than or equal to the second power threshold and less than the first power threshold. If the power of the battery is greater than or equal to the second power threshold and less than the first power threshold, go to step 3043; if the charge level of the battery is less than the second charge level threshold, step 305 is performed.
The second charge threshold is less than the first charge threshold. When the battery provides power by the electric quantity which is greater than or equal to the second electric quantity threshold value and less than the first electric quantity threshold value, the service life of the battery is not damaged. The second charge threshold is set by the skilled person according to the actual need.
In step 3043, the power system is controlled to operate in the hybrid mode. Then, step 305 is performed.
The hybrid mode includes a battery mode and a natural gas mode, or a battery mode and a gasoline mode. And when the electric quantity of the battery is greater than or equal to the second electric quantity threshold value and smaller than the first electric quantity threshold value, controlling the power system to simultaneously operate the battery mode and the natural gas mode or controlling the power system to simultaneously operate the battery mode and the gasoline mode.
In step 3043, if the battery is charged in step 302 by operating the natural gas mode, controlling the power system to operate the battery mode and the natural gas mode simultaneously; if the battery is charged by operating in the gasoline mode in step 302, the power system is controlled to operate in the battery mode and the gasoline mode.
In step 305, it is determined whether the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold. If the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than or equal to the pressure threshold, then the powertrain meets the natural gas mode operating conditions and step 306 is executed. If the engine coolant temperature is less than the temperature threshold or the natural gas cylinder pressure is less than the pressure threshold, then the powertrain does not meet the natural gas mode operating conditions and step 301 is executed.
The relevant contents of the temperature threshold and the pressure threshold are referred to in the foregoing step 103, and the detailed description is omitted here.
In step 306, the power system is controlled to operate in the natural gas mode, and then step 302 is executed.
In step 306, in the process of operating the power system in the gasoline mode, if the power system meets the operating condition of the natural gas mode, the power system is controlled to operate in the natural gas mode, so that the exhaust emission and the fuel consumption can be reduced.
In step 307, the power system is controlled to operate in battery mode.
Alternatively, when the hybrid vehicle needs to consume a large amount of energy during operation, for example, the operation condition of the hybrid vehicle meets any one of climbing, accelerating, and the like, the power system may be controlled to operate the hybrid mode in step 307, and the related content of the hybrid mode is referred to in step 3043, and a detailed description is omitted here.
In the embodiment of the disclosure, after the hybrid electric vehicle is started in the gasoline mode, the battery is charged. And if the power system meets the battery mode operation condition in the operation process of the hybrid electric vehicle, controlling the power system to operate in the battery mode. And if the power system does not meet the battery mode operation condition and meets the natural gas mode operation condition, controlling the power system to operate the natural gas mode, and charging the battery in the natural gas mode. And controlling the power system to operate the battery mode until the power system meets the battery mode operation condition again. That is, in the embodiments of the present disclosure, the power system is controlled to provide power in the order of priority in which the battery mode is greater than the natural gas mode, and the natural gas mode is greater than the gasoline mode. Because the battery mode is zero exhaust emission and the exhaust emission of the natural gas mode is less than that of the gasoline mode, the exhaust emission of the hybrid electric vehicle in the running process can be further reduced according to the control method of the power system.
Fig. 4 is a flowchart of a method for controlling a powertrain of a hybrid vehicle, which may be executed by a vehicle controller to control the powertrain to provide power after the hybrid vehicle is started in a natural gas mode according to an embodiment of the disclosure. Referring to fig. 4, the method includes:
in step 401, the power system is controlled to operate in the natural gas mode.
According to the embodiment shown in fig. 2, the hybrid vehicle is started only when the power system does not meet the battery mode operation condition. Therefore, in the embodiment of the disclosure, after the hybrid electric vehicle is started in the natural gas mode, the power system is controlled to operate in the natural gas mode to provide the hybrid electric vehicle with the operation power.
In step 402, the power system is controlled to charge the battery.
When the power system operates in the natural gas mode, the battery is charged in the natural gas mode; when the power system operates in the gasoline mode, the battery is charged through the gasoline mode.
In step 403, the battery level, engine coolant temperature, and natural gas cylinder pressure are obtained.
The related contents of acquiring the electric quantity of the battery refer to the aforementioned step 101, and the related contents of acquiring the engine coolant temperature and the natural gas cylinder pressure refer to the aforementioned step 102, and a detailed description thereof is omitted.
In step 404, it is determined whether the charge level of the battery is greater than or equal to a first charge level threshold. If the charge level of the battery is greater than or equal to the first charge level threshold, perform step 407; if the charge level of the battery is less than the first charge level threshold, step 405 is performed.
The content of the first power threshold, referred to as the aforementioned step 102, is omitted here.
Optionally, in this embodiment of the present disclosure, step 404 may also be replaced with:
in step 4041, a determination is made as to whether the charge level of the battery is greater than a first charge level threshold. If the charge level of the battery is greater than or equal to the first charge level threshold, perform step 407; if the charge of the battery is less than the first charge threshold, step 4042 is performed.
In step 4042, it is determined whether the power of the battery is greater than or equal to the second power threshold and less than the first power threshold. If the power of the battery is greater than or equal to the second power threshold and less than the first power threshold, then go to step 4043; if the charge level of the battery is less than the second charge level threshold, step 405 is performed.
The content of the second power threshold, referred to as the aforementioned step 3042, is omitted here.
In step 4043, the power system is controlled to operate in the hybrid mode. Then, step 405 is performed.
The details of the hybrid mode are referred to in the foregoing step 3043, and a detailed description thereof is omitted.
In step 4043, if the battery is charged by operating the natural gas mode in step 402, controlling the power system to operate the battery mode and the natural gas mode simultaneously; if the battery is charged by operating the gasoline mode in step 402, the power system is controlled to operate in the battery mode and the gasoline mode.
In step 405, it is determined whether the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold. If the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than or equal to the pressure threshold, then the powertrain meets the natural gas mode operating conditions and step 401 is executed. If the engine coolant temperature is less than the temperature threshold or the natural gas cylinder pressure is less than the pressure threshold, then the powertrain does not meet the natural gas mode operating conditions and step 406 is executed.
The relevant contents of the temperature threshold and the pressure threshold are referred to in the foregoing step 103, and the detailed description is omitted here.
In step 406, the powertrain is controlled to operate in the gasoline mode, and then step 402 is executed.
In step 407, the power system is controlled to operate in a battery mode.
Alternatively, when the hybrid vehicle needs to consume a large amount of energy during operation, for example, the operation condition of the hybrid vehicle satisfies any one of climbing, accelerating, and the like, step 407 may also control the power system to operate the hybrid mode. The details of the hybrid mode are referred to in the foregoing step 3043, and a detailed description thereof is omitted.
In the embodiment of the disclosure, after the hybrid electric vehicle is started in the natural gas mode, the power system is controlled to operate in the natural gas mode, and the battery is charged in the natural gas mode. And when the power system meets the battery mode operation condition, controlling the power system to operate the battery mode. And when the power system does not meet the battery mode operation condition and does not meet the natural gas mode operation condition, controlling the power system to operate in a gasoline mode. That is, in the embodiments of the present disclosure, the power system is controlled to provide power in the order of priority in which the battery mode is greater than the natural gas mode, and the natural gas mode is greater than the gasoline mode. Because the battery mode has zero exhaust emission and the exhaust emission of the natural gas mode is smaller than that of the gasoline mode, the exhaust emission of the hybrid electric vehicle in the running process can be reduced according to the control method of the power system.
Fig. 5 is a flowchart of a method for controlling a powertrain of a hybrid vehicle, which may be executed by a vehicle controller to control the powertrain to provide power after the hybrid vehicle is started in a battery mode according to an embodiment of the disclosure. Referring to fig. 5, the method includes:
in step 501, the power system is controlled to operate in a battery mode.
In step 502, the charge level of the battery is obtained.
The relevant content of the battery capacity is obtained, see the foregoing step 101, and the detailed description is omitted here.
In step 503, it is determined whether the charge level of the battery is greater than or equal to a first charge level threshold. If the charge level of the battery is greater than or equal to the first charge level threshold, the power system satisfies the battery mode operating condition and step 501 is executed. If the charge level of the battery is less than the first charge level threshold, the power system does not satisfy the battery mode operating condition and step 504 is executed.
The content of the first power threshold, referred to as the aforementioned step 102, is omitted here.
Optionally, in this embodiment of the present disclosure, step 503 may also be replaced with:
in step 5031, it is determined whether the charge level of the battery is greater than a first charge level threshold. If the power of the battery is greater than or equal to the first power threshold, executing step 501; if the charge level of the battery is less than the first charge level threshold, then step 5032 is performed.
In step 5032, it is determined whether the charge level of the battery is greater than or equal to the second charge level threshold and less than the first charge level threshold. If the power level of the battery is greater than or equal to the second power level threshold and less than the first power level threshold, then perform step 5033; if the charge level of the battery is less than the second charge level threshold, step 504 is performed.
The content of the second power threshold, referred to as the aforementioned step 3042, is omitted here.
In step 5033, control is given to the powertrain to operate in the hybrid mode. Then, step 508 is performed.
The details of the hybrid mode are referred to in the foregoing step 3043, and a detailed description thereof is omitted.
In step 504, engine coolant temperature and natural gas cylinder pressure are obtained.
In step 505, it is determined whether the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold. If the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than or equal to the pressure threshold, step 506 is performed. If the engine coolant temperature is less than the temperature threshold or the natural gas cylinder pressure is less than the pressure threshold, step 507 is performed.
The relevant contents of the temperature threshold and the pressure threshold are referred to in the foregoing step 103, and the detailed description is omitted here.
In step 506, the power system is controlled to operate in the natural gas mode.
In step 507, control operates the powertrain in the gasoline mode.
In step 508, the power system is controlled to charge the battery.
When the power system operates in the natural gas mode, charging the battery in the natural gas mode; when the power system operates in the gasoline mode, the battery is charged through the gasoline mode.
In step 509, the battery charge, engine coolant temperature, and natural gas cylinder pressure are obtained. Then, step 503 is performed.
In the embodiment of the disclosure, after the hybrid electric vehicle is started in the natural gas mode, in the running process of the hybrid electric vehicle, when the power system meets the battery mode running condition, the power system is controlled to run in the battery mode to provide power for the running of the hybrid electric vehicle; when the power system does not meet the battery mode operation condition and the power system meets the natural gas mode operation condition, controlling the power system to operate the natural gas mode to provide operation power for the hybrid electric vehicle; and when the power system does not meet the battery mode operation condition and also does not meet the natural gas mode operation condition, controlling the power system to operate a gasoline mode to perform hybrid power steam stripping for operating the power vehicle. That is, in the disclosed embodiment, the power system is controlled to provide power in a priority order of the battery mode being greater than the natural gas mode, and the natural gas mode being greater than the gasoline mode. Because the exhaust emission of the battery mode is zero and the exhaust emission of the natural gas mode is less than that of the gasoline mode, the exhaust emission of the hybrid electric vehicle in the running process can be reduced according to the control method of the power system.
Fig. 6 is a block diagram of a power system control device 600 of a hybrid vehicle according to an embodiment of the present disclosure. The power system of the hybrid vehicle has a battery mode, a natural gas mode, and a gasoline mode. As shown in fig. 6, the apparatus includes: an acquisition module 601 and a control module 602.
The acquiring module 601 is configured to acquire an electric quantity of a battery; in response to determining that the amount of power is less than a first power threshold, an engine coolant temperature and a natural gas cylinder pressure are obtained. A control module 602 to control the power system to operate in the natural gas mode or the gasoline mode based on the engine coolant temperature and the natural gas cylinder pressure.
Optionally, the control module 602 is configured to control the power system to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold; alternatively, the power system is controlled to operate the gasoline mode in response to determining that the engine coolant temperature is less than a temperature threshold or the natural gas cylinder pressure is less than a pressure threshold.
Optionally, the control module 602 is further configured to control an engine to charge the battery after controlling the power system to operate in the natural gas mode; controlling the power system to operate the battery mode in response to determining that the charge is greater than or equal to the first charge threshold.
Optionally, the control module 602 is further configured to control the power system to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than the pressure threshold after controlling the power system to operate the gasoline mode; controlling the engine to charge the battery; controlling the power system to operate in the battery mode in response to determining that the charge is greater than or equal to the first charge threshold.
Optionally, the control module 602 is further configured to control the engine to charge the battery after controlling the power system to operate in the gasoline mode; controlling the power system to operate the battery mode in response to determining that the battery charge is greater than the first charge threshold.
It should be noted that: in the power system control device 600 of the hybrid vehicle according to the above embodiment, when the power system of the hybrid vehicle is controlled, only the division of the above functional modules is taken as an example, and in practical applications, the above functions may be distributed to different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions. In addition, the power system control apparatus 600 of the hybrid electric vehicle provided in the above embodiment and the power system control method embodiment of the hybrid electric vehicle belong to the same concept, and specific implementation processes thereof are referred to as method embodiments, and are not described herein again.
Fig. 7 is a block diagram of a computer device provided in an embodiment of the present disclosure. As shown in fig. 7, the computer device 700 may be a vehicle-mounted computer or the like. The computer device 700 includes: a processor 701 and a memory 702.
Processor 701 may include one or more processing cores, such as a 7-core processor, an 8-core processor, and so on. The processor 701 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 701 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 701 may be integrated with a GPU (Graphics Processing Unit) that is responsible for rendering and drawing content that needs to be displayed on the display screen. In some embodiments, the processor 701 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.
Memory 702 can include one or more computer-readable media, which can be non-transitory. Memory 702 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable medium in the memory 702 is used to store at least one instruction for execution by the processor 701 to implement the powertrain control method of a hybrid vehicle provided in embodiments of the present disclosure.
Those skilled in the art will appreciate that the architecture illustrated in FIG. 7 is not intended to be limiting of the computer device 700, and may include more or fewer components than those illustrated, or some components may be combined, or a different arrangement of components may be used.
Embodiments of the present invention also provide a non-transitory computer readable medium, in which instructions are executed by a processor of the computer device 700, so that the computer device 700 can perform the power system control method of the hybrid vehicle provided in the embodiments of the present disclosure.
A computer program product comprising computer programs/instructions, wherein the computer programs/instructions, when executed by a processor, implement the powertrain control method of a hybrid vehicle provided in the embodiments of the present disclosure.
The above description is meant to be illustrative of the principles of the present disclosure and not to be taken in a limiting sense, and any modifications, equivalents, improvements and the like that are within the spirit and scope of the present disclosure are intended to be included therein.

Claims (7)

1. A power system control method of a hybrid vehicle, characterized in that a power system of the hybrid vehicle has a battery mode, a natural gas mode, and a gasoline mode, the method comprising:
acquiring the electric quantity of a battery;
in response to determining that the amount of power is less than a first power threshold, obtaining an engine coolant temperature and a natural gas cylinder pressure;
controlling the powertrain to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold; alternatively, the power system is controlled to operate the gasoline mode in response to determining that the engine coolant temperature is less than a temperature threshold or the natural gas cylinder pressure is less than a pressure threshold.
2. The method of claim 1, wherein after controlling the power system to operate in the natural gas mode, the method further comprises:
controlling an engine to charge the battery;
controlling the power system to operate the battery mode in response to determining that the charge is greater than or equal to the first charge threshold.
3. The method of claim 1, wherein after controlling the power system to operate in the gasoline mode, the method further comprises:
in response to determining that the engine coolant temperature is greater than or equal to the temperature threshold and the natural gas cylinder pressure is greater than the pressure threshold, controlling the power system to operate the natural gas mode;
controlling the engine to charge the battery;
controlling the power system to operate the battery mode in response to determining that the charge is greater than or equal to the first charge threshold.
4. The method of claim 1, and after controlling the power system to the gasoline mode, the method further comprises:
controlling the engine to charge the battery;
controlling the power system to operate the battery mode in response to determining that the battery charge is greater than the first charge threshold.
5. A power-system control apparatus of a hybrid vehicle, characterized in that a power system of the hybrid vehicle has a battery mode, a natural gas mode, and a gasoline mode, the apparatus comprising:
the acquisition module is used for acquiring the electric quantity of the battery; in response to determining that the amount of power is less than a first power threshold, obtaining an engine coolant temperature and a natural gas cylinder pressure;
a control module to control the power system to operate the natural gas mode in response to determining that the engine coolant temperature is greater than or equal to a temperature threshold and the natural gas cylinder pressure is greater than or equal to a pressure threshold; alternatively, the power system is controlled to operate the gasoline mode in response to determining that the engine coolant temperature is less than a temperature threshold or the natural gas cylinder pressure is less than a pressure threshold.
6. A computer device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the method of any one of claims 1 to 4.
7. A computer-readable medium, wherein instructions in the computer-readable medium, when executed by a processor of a computer device, enable the computer device to perform the method of any of claims 1 to 4.
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