CN113246960B - Engine cold start method, automobile and computer readable storage medium - Google Patents
Engine cold start method, automobile and computer readable storage medium Download PDFInfo
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- CN113246960B CN113246960B CN202110545014.1A CN202110545014A CN113246960B CN 113246960 B CN113246960 B CN 113246960B CN 202110545014 A CN202110545014 A CN 202110545014A CN 113246960 B CN113246960 B CN 113246960B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000000110 cooling liquid Substances 0.000 claims abstract description 36
- 239000002826 coolant Substances 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000009194 climbing Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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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
- 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
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0676—Engine temperature
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an engine cold start method, an automobile and a computer readable storage medium, wherein the method comprises the following steps: detecting the electric quantity state of an automobile battery, and acquiring the temperature of cooling liquid of an engine according to the electric quantity state; judging whether the engine meets a torque limit condition or not according to the temperature of the cooling liquid; and if the engine does not meet the torque limit condition, acquiring a torque limit parameter, and controlling the engine to output corresponding torque according to the torque limit parameter. According to the invention, through acquiring the temperature of the cooling liquid of the engine, whether the engine meets the torque limit condition can be judged according to the temperature of the cooling liquid, and further, under the condition that the condition is not met, the torque limit is carried out on the engine according to the preset torque limit parameter, so that under the condition that the electric quantity of an automobile battery is low, the problems of overlarge torque and overhigh rotating speed caused by cold start of the engine are prevented, the oil consumption and the pollutant emission during the cold start of the engine are reduced, and the service life of the engine is prolonged.
Description
Technical Field
The invention relates to the field of automobile application, in particular to an engine cold start method, an automobile and a computer readable storage medium.
Background
In order to respond to the national call for energy conservation and emission reduction, the plug-in hybrid electric vehicle is more and more concerned; the plug-in hybrid Vehicle can select an EV mode, compared to a conventional HEV Vehicle (hybrid Vehicle), and can continuously travel more than 50Km in the EV mode by a pure Electric drive.
On the other hand, when the SOC (State of charge) is lowered, the EV mode cannot be maintained, and the engine is forcibly started, and in this case, the following problem occurs during the engine start:
the driving condition of the vehicle in the EV mode is uncertain, and the vehicle speed in the EV mode cannot be known exactly; if the engine is started at a high speed, the engine can be directly dragged to a state of large torque and high rotating speed, and if the temperature of the engine and the temperature of the catalyst are lower at the moment, the service life of the engine is seriously influenced;
therefore, the prior art has yet to be improved.
Disclosure of Invention
The invention aims to solve the technical problems of high rotating speed and high torque of an engine during cold start due to SOC reduction by aiming at the defects of the prior art and providing an engine cold start method, an automobile and a computer readable storage medium.
The technical scheme adopted by the invention for solving the technical problem is as follows:
in a first aspect, the present invention provides a cold start method of an engine, comprising the steps of:
detecting the electric quantity state of an automobile battery, and acquiring the temperature of cooling liquid of an engine according to the electric quantity state;
judging whether the engine meets a torque limit condition or not according to the temperature of the cooling liquid;
and if the engine meets the torque limit condition, acquiring a torque limit parameter, and controlling the engine to output corresponding torque according to the torque limit parameter.
In one embodiment, detecting the state of charge of a vehicle battery previously comprises:
the method comprises the steps of obtaining corresponding vehicle speeds of the engine under different road conditions in advance, and setting torque limiting parameters of the engine according to the vehicle speeds and the corresponding road conditions.
In one embodiment, detecting a state of charge of a battery of a vehicle and obtaining a coolant temperature of an engine according to the state of charge, includes:
acquiring current electric quantity information of an automobile battery;
judging whether the electric quantity of the automobile is lower than a preset electric quantity or not according to the current electric quantity information;
if the electric quantity of the automobile is lower than the preset electric quantity, the temperature of the cooling liquid of the engine is obtained.
In one embodiment, determining whether the engine satisfies a torque limit condition based on a coolant temperature includes:
acquiring a preset temperature, and judging whether the temperature of the cooling liquid is less than the preset temperature or not;
and if the temperature of the cooling liquid is less than the preset temperature, judging that the engine does not meet the torque limit condition.
In one embodiment, acquiring a torque limit parameter and controlling the engine to output a corresponding torque according to the torque limit parameter comprises:
acquiring the current speed and the current road condition of the automobile, and acquiring corresponding torque limiting parameters according to the current speed and the current road condition;
and starting the engine according to the torque limit parameter, and controlling the torque of the engine within the torque limit parameter.
In one embodiment, starting the engine according to a torque limit parameter and controlling torque of the engine within the torque limit parameter comprises:
starting the engine according to the torque limiting parameter;
controlling the torque of the engine within a torque limit parameter, and distributing the output torque of the motor according to the torque of the engine after torque limit;
and controlling the motor to output corresponding torque according to the output torque.
In one embodiment, starting the engine according to the torque limit parameter and controlling the torque of the engine within the torque limit parameter, and then:
obtaining the temperature of the cooling liquid after the torque of the engine is limited;
judging whether the engine meets a torque limit condition or not according to the temperature of the coolant after torque limit;
and if the engine does not meet the torque limit condition, controlling the engine to adjust the current torque to the normal output torque.
In one embodiment, obtaining a torque limit parameter and controlling the engine to output a corresponding torque according to the torque limit parameter, and then:
acquiring the electric quantity consumption parameters after torque limitation;
and performing associated storage on the electric quantity consumption parameters after the torque limitation and the corresponding torque limitation parameters.
In a second aspect, the present invention also provides an automobile comprising: the device comprises a shell, an engine, a motor and a vehicle-mounted control terminal; the engine, the motor and the vehicle-mounted control terminal are integrated in the shell;
the vehicle-mounted control terminal comprises: a processor and a memory storing an engine cold start program, the engine cold start program being executable by the processor for implementing the engine cold start method according to the first aspect.
In a third aspect, the present invention also provides a computer-readable storage medium storing an engine cold start program, which when executed by a processor, is configured to implement the engine cold start method according to the first aspect.
The invention adopts the technical scheme and has the following effects:
according to the invention, through acquiring the temperature of the cooling liquid of the engine, whether the engine meets the torque limit condition can be judged according to the temperature of the cooling liquid, and further, under the condition that the condition is not met, the torque limit is carried out on the engine according to the preset torque limit parameter, so that under the condition that the electric quantity of an automobile battery is low, the problems of overlarge torque and overhigh rotating speed caused by cold start of the engine are prevented, the oil consumption and the pollutant emission during the cold start of the engine are reduced, and the service life of the engine is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a flow chart of a method of cold starting an engine in one implementation of the invention.
Fig. 2 is a functional schematic of an automobile in one implementation of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Exemplary method
As shown in fig. 1, an embodiment of the present invention provides an engine cold start method, including the steps of:
and S100, detecting the electric quantity state of the automobile battery, and acquiring the temperature of the cooling liquid of the engine according to the electric quantity state.
In the embodiment, the engine cold start method is applied to an automobile which is a plug-in hybrid electric vehicle and comprises an engine, a motor and an on-board control terminal; the automobile can run under the pure electric motor driving condition, can run under the engine and motor hybrid power condition, and can also run under the pure engine driving condition; when the automobile is driven by a pure electric machine, the endurance mileage reaches more than 50 Km; the vehicle-mounted control terminal is used as a whole vehicle control end of the vehicle and can be used for controlling an engine, a motor and other auxiliary equipment/systems of the vehicle.
When a driver selects a pure electric motor driving mode, an engine of the automobile does not intervene in work; in the running process of the automobile, if the battery electric quantity of the automobile is low, the electric power of the motor cannot be maintained; at the moment, the engine is forcibly started under the control of the vehicle-mounted control terminal; if the engine is in a cold start (i.e., the first start), the engine will pull up the rotation speed and increase the torque, so the torque of the engine needs to be controlled, i.e., the torque of the engine is limited, thereby avoiding the phenomena of large torque and high rotation speed of the engine in the cold start state.
In the embodiment, before the torque limit is performed on the engine of the automobile, a plurality of torque limit parameters need to be set in the vehicle-mounted control terminal; the torque limiting parameter is a corresponding torque limiting parameter of the automobile under different road conditions; the method specifically comprises the following steps: when the temperature of the engine coolant of the automobile reaches the normal working temperature, simulating different road conditions through an automobile test bed, and obtaining real-time torque parameters at different speeds by adjusting the speed of the automobile in the different road conditions; and after the real-time torque parameter is obtained, setting a torque limiting parameter required by the cold start of the engine according to the real-time vehicle speed and the real-time torque parameter.
Further, in the testing process of the automobile test bed, the tested road conditions include: flat road conditions, climbing road conditions and downhill road conditions; when the automobile is in the same road condition, the real-time speed and the corresponding torque parameter of the automobile are obtained, the obtained real-time speed and the corresponding torque parameter are analyzed, the corresponding torque limiting parameter under the road condition is obtained, and an information list of the road condition, the speed and the torque limiting parameter is generated.
Further, in order to avoid the torque after the torque limitation of the engine from being too low, when the torque limitation parameters corresponding to different road conditions and different vehicle speeds are set, the obtained real-time torque parameters can be corrected, namely, the preset torque is increased on the basis of the real-time torque, so that the corresponding torque limitation parameters are obtained; wherein the preset torque may be 5n.m or 10n.m.
That is, in one implementation manner of the present embodiment, step 100 includes the following steps before:
and 001, acquiring corresponding vehicle speeds of the engine under different road conditions in advance, and setting torque limiting parameters of the engine according to the vehicle speeds and the corresponding road conditions.
In this embodiment, after the torque limit parameter of the engine is set, in the actual running process of the automobile, if the automobile is in the pure electric drive mode, the vehicle-mounted control terminal of the automobile acquires the current electric quantity information of the automobile battery, and judges whether the electric quantity of the automobile is lower than the preset electric quantity according to the current electric quantity information; the current electric quantity information of the battery comprises the current residual electric quantity, the battery charging state, the estimated residual travelable mileage and the like.
Further, when judging whether the current residual electric quantity of the automobile battery is lower than the preset electric quantity, the vehicle-mounted control terminal can firstly acquire the preset electric quantity so as to judge whether the current residual electric quantity of the automobile battery is lower than the preset electric quantity; wherein, the preset electric quantity can be 10% of the total electric quantity of the battery; of course, the preset electric quantity may also be an electric quantity required by the automobile to drive a specified mileage under a flat road condition, for example: the electric quantity required by the automobile running for 5 Km; or, the preset electric quantity may be an electric quantity corresponding to the remaining endurance mileage, for example: and the corresponding electric quantity when the remaining endurance mileage is 5 Km.
Further, when judging whether the current electric quantity is lower than the preset electric quantity, if the current electric quantity of the automobile battery is lower than the preset electric quantity, the current electric quantity of the automobile is too low, and an engine needs to be started to maintain the power output of the automobile; before starting the engine, in order to avoid the phenomenon of large torque and high rotation speed of the engine, whether the engine is started for the first time needs to be determined, and if the engine is started for the first time, the torque of the engine needs to be limited so as to reduce the output torque when the engine is started.
When determining whether the engine is started for the first time, the vehicle-mounted control terminal acquires the temperature of cooling liquid of the engine, and whether the temperature of the engine reaches the optimal working temperature can be judged according to the temperature of the cooling liquid; wherein the optimum working temperature is a stable temperature or an average temperature of the engine under normal operation.
That is, in an implementation manner of this embodiment, step S100 specifically includes the following steps:
step S110, acquiring current electric quantity information of the automobile battery;
step S120, judging whether the electric quantity of the automobile is lower than a preset electric quantity or not according to the current electric quantity information;
and step S130, if the electric quantity of the automobile is lower than the preset electric quantity, obtaining the temperature of the cooling liquid of the engine.
This embodiment can be when battery electric quantity is low excessively through the current electric quantity information who acquires the battery, in time acquires coolant temperature, and then judges whether the temperature of engine reaches best operating temperature through coolant temperature to avoid drawing high moment of torsion and rotational speed because of the engine cold start is mandatory.
In one implementation of the embodiment of the invention, as shown in fig. 1, the engine cold start method further comprises the steps of:
and step S200, judging whether the engine meets a torque limit condition according to the temperature of the cooling liquid.
In this embodiment, when determining whether an engine of an automobile is started for the first time, the vehicle-mounted control terminal obtains a preset temperature, and determines whether the temperature of the coolant is less than the preset temperature; wherein the preset temperature may be a normal operating temperature of the engine coolant, such as: when the optimal conversion efficiency of the catalytic converter is achieved, the temperature of the engine coolant is about 50 ℃; if the temperature of the cooling liquid is lower than the preset temperature, the engine is indicated as being started for the first time (namely cold start); at this time, it is determined that the engine does not satisfy the torque limit condition, that is, the torque limit condition is: the temperature of the cooling liquid is greater than or equal to a second preset temperature.
That is, in an implementation manner of this embodiment, the step S200 specifically includes the following steps:
step S210, acquiring a preset temperature, and judging whether the temperature of the cooling liquid is less than the preset temperature;
and step S220, if the temperature of the cooling liquid is less than the preset temperature, judging that the engine does not meet the torque limit condition.
This embodiment is through comparing the coolant temperature who obtains respectively with the temperature of settlement to whether confirm according to the comparison result that the engine satisfies the limit for torsion condition, thereby when the engine does not satisfy the limit for torsion condition, implement the limit for torsion strategy to this engine, avoid the engine to appear the phenomenon of high moment of torsion and high rotational speed when cold start.
In one implementation of the embodiment of the invention, as shown in fig. 1, the engine cold start method further comprises the steps of:
and step S300, if the engine meets the torque limit condition, acquiring a torque limit parameter, and controlling the engine to output corresponding torque according to the torque limit parameter.
In the embodiment, after the engine is determined to meet the torque limit condition, the vehicle-mounted control terminal acquires the current speed of the automobile and acquires the corresponding torque limit parameter according to the current speed; the torque limiting parameter is a torque limiting parameter preset in the vehicle-mounted control terminal.
Further, when the current speed of the automobile is obtained, the vehicle-mounted control terminal can determine the current road condition according to the historical speed and the current speed; wherein the historical vehicle speed may be a vehicle speed within 2 minutes or 5 minutes before the current time point; determining the vehicle speed change condition in the time period according to the acquired historical vehicle speed and the current vehicle speed; furthermore, the current road condition can be determined by acquiring the accelerator pedal signal, determining the change condition of the opening of the accelerator pedal and combining the change condition of the opening of the accelerator pedal and the change condition of the vehicle speed; for example, in the first 2 minutes from the current time point, the accelerator pedal opening is in a continuously increasing state, and the vehicle speed is in a gradually decreasing state, which indicates that the vehicle is in a climbing road condition.
Further, when the current road condition is determined, the current gradient of the running of the automobile can be obtained through a gyroscope built in the ESC of the automobile, and then the current road condition is determined according to the obtained current gradient; for example, if the current gradient is +15 °, it indicates that the vehicle is currently in a climbing road condition; the current gradient is-15 degrees, which means that the automobile is currently in the downhill road condition.
After the current road condition of the automobile is determined, the vehicle-mounted control terminal can query an information list of road condition-vehicle speed-torque limit parameters by combining the acquired real-time vehicle speed to obtain corresponding torque limit parameters; and starting the engine according to the torque limit parameter, and controlling the torque of the engine within the torque limit parameter.
That is, in an implementation manner of this embodiment, the step S300 specifically includes the following steps:
step S310, acquiring the current speed and the current road condition of the automobile, and acquiring corresponding torque limiting parameters according to the current speed and the current road condition;
and step S320, starting the engine according to the torque limiting parameter, and controlling the torque of the engine within the torque limiting parameter.
In the embodiment, after the torque limit parameter is obtained, the vehicle-mounted control terminal starts the engine according to the torque limit parameter, and then controls the torque of the engine within the torque limit parameter by controlling the fuel injection quantity of the engine; after the output torque of the engine is controlled, the output torque of the engine is stabilized in a set parameter range; to supplement the power required by the vehicle; at the moment, the vehicle-mounted control terminal also distributes the output torque of the motor according to the engine torque after torque limitation, so as to control the motor to output the corresponding torque according to the output torque.
Specifically, when the output torque of the motor is distributed, firstly determining the torque required by the driver through the opening degree of an accelerator pedal, and then subtracting the torque of the engine after torque limitation from the torque required by the driver to obtain the torque required by the motor; and finally, controlling the motor to output corresponding torque according to the torque required by the motor so as to complement the power of the finished vehicle through the output torque of the motor.
That is, in an implementation manner of the present embodiment, in step S320, the following steps are specifically included:
step S321, starting the engine according to the torque limit parameter;
step S322, controlling the torque of the engine in a torque limiting parameter, and distributing the output torque of the motor according to the torque of the engine after torque limiting;
and step S323, controlling the motor to output corresponding torque according to the output torque.
In the embodiment, after the output torque of the engine is limited, the vehicle-mounted control terminal can regularly acquire the temperature of the coolant after torque limitation, and judge whether the engine meets the torque limitation condition according to the temperature of the coolant after torque limitation; and if the engine meets the torque limit condition, controlling the engine to adjust the current torque to the normal output torque.
That is, in an implementation manner of the present embodiment, step S320 further includes the following steps:
step S330, obtaining the temperature of the cooling liquid after the torque of the engine is limited;
step S340, judging whether the engine meets a torque limit condition according to the temperature of the coolant after torque limit;
and step S350, if the engine does not meet the torque limit condition, controlling the engine to adjust the current torque to the normal output torque.
According to the embodiment, the corresponding torque limit parameter can be determined in time under the condition that the electric quantity of the battery is too low by acquiring the speed of the automobile during running, and the engine is controlled to output the corresponding torque according to the torque limit parameter, so that the overlarge torque of the engine during cold starting is avoided; and the torque limit strategy of the engine is cancelled in time by acquiring the temperature of the cooling liquid after torque limit when the engine does not meet the torque limit condition, so that the excessive consumption of the battery power caused by long-time torque limit is avoided.
In this embodiment, after the execution of the torque limit strategy of the engine is completed, the vehicle-mounted control terminal acquires the torque-limited power consumption parameter, and stores the torque-limited power consumption parameter in association with the corresponding torque limit parameter; the electric quantity consumption parameter is the electric quantity consumed by the motor in the torque-limited time period of the engine; through recording the electric quantity consumption parameters after the torque limit, the electric quantity consumption condition and the torque limit parameters can be stored in an associated mode, so that the vehicle-mounted control terminal can conveniently learn according to the recorded data, and corresponding parameters are further optimized when a torque limit strategy is executed next time.
Step S400, acquiring the electric quantity consumption parameters after torque limitation;
and S500, performing associated storage on the power consumption parameters after the torque limitation and the corresponding torque limitation parameters.
Therefore, according to the embodiment, whether the engine meets the torque limit condition or not can be judged according to the temperature of the cooling liquid of the engine by acquiring the temperature of the cooling liquid of the engine, and then the torque limit of the engine is carried out according to the preset torque limit parameter under the condition that the condition is not met, so that the problems of overlarge torque and overhigh rotating speed caused by cold start of the engine are prevented under the condition that the electric quantity of an automobile battery is low, the oil consumption and the emission of pollutants during the cold start of the engine are reduced, and the service life of the engine is prolonged.
Exemplary device
Based on the above embodiment, the present invention further provides an automobile, and a schematic block diagram thereof may be as shown in fig. 2.
This car includes: the device comprises a shell, an engine, a motor and a vehicle-mounted control terminal; the engine, the motor and the vehicle-mounted control terminal are integrated in the shell;
the vehicle-mounted control terminal comprises: the system comprises a processor, a memory, an interface and a display screen which are connected through a system bus; wherein the processor of the vehicle is configured to provide computing and control capabilities; the memory of the automobile comprises a nonvolatile storage medium and an internal memory; the non-volatile storage medium stores an operating system and a computer program; the internal memory provides an environment for the operation of an operating system and a computer program in the nonvolatile storage medium; the interface of the automobile is used for being connected with an engine and a motor.
The computer program is executed by a processor to implement a method for cold starting an engine.
It will be understood by those skilled in the art that the schematic block diagram shown in fig. 2 is only a block diagram of a portion of the structure associated with the inventive arrangements and is not intended to limit the vehicles to which the inventive arrangements may be applied, and that a particular vehicle may include more or less components than those shown, or may have some components combined, or a different arrangement of components.
In one embodiment, an automobile is provided, comprising: a processor and a memory storing an engine cold start program, the engine cold start program when executed by the processor for implementing the engine cold start method as described above.
In one embodiment, a computer readable storage medium is provided, wherein the computer readable storage medium stores an engine cold start program that when executed by a processor is for implementing an engine cold start method as described above.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory.
In summary, the present invention provides an engine cold start method, an automobile and a computer readable storage medium, wherein the method includes: detecting the electric quantity state of an automobile battery, and acquiring the temperature of cooling liquid of an engine according to the electric quantity state; judging whether the engine meets a torque limit condition or not according to the temperature of the cooling liquid; and if the engine does not meet the torque limit condition, acquiring a torque limit parameter, and controlling the engine to output a corresponding torque according to the torque limit parameter. According to the invention, through acquiring the temperature of the cooling liquid of the engine, whether the engine meets the torque limit condition can be judged according to the temperature of the cooling liquid, and further, under the condition that the condition is not met, the torque limit is carried out on the engine according to the preset torque limit parameter, so that under the condition that the electric quantity of an automobile battery is low, the problems of overlarge torque and overhigh rotating speed caused by cold start of the engine are prevented, the oil consumption and the pollutant emission during the cold start of the engine are reduced, and the service life of the engine is prolonged.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (9)
1. An engine cold start method, characterized by comprising the steps of:
detecting the electric quantity state of an automobile battery, and acquiring the temperature of cooling liquid of an engine according to the electric quantity state;
judging whether the engine meets a torque limit condition or not according to the temperature of the cooling liquid; wherein the torque limit condition is that the temperature of the cooling liquid is less than or equal to a second preset temperature;
if the engine meets the torque limiting condition, acquiring a torque limiting parameter, and controlling the engine to output a corresponding torque according to the torque limiting parameter;
the acquiring of the torque limiting parameter and the controlling of the engine to output the corresponding torque according to the torque limiting parameter comprise:
acquiring the current speed and the current road condition of the automobile, and acquiring corresponding torque limiting parameters according to the current speed and the current road condition;
starting the engine according to the torque limiting parameter, and controlling the torque of the engine within the torque limiting parameter;
the step of obtaining the current speed and the current road condition of the automobile and obtaining the corresponding torque limiting parameter according to the current speed and the current road condition comprises the following steps:
determining a speed change condition according to the current speed of the automobile, and determining a current road condition according to the speed change condition and an accelerator pedal signal of the automobile;
and obtaining a torque limiting parameter according to the current road condition, the current vehicle speed and a preset road condition-vehicle speed-torque limiting parameter information list.
2. The engine cold start method of claim 1, wherein said detecting a state of charge of a vehicle battery is preceded by:
the method comprises the steps of obtaining corresponding vehicle speeds of the engine under different road conditions in advance, and setting torque limiting parameters of the engine according to the vehicle speeds and the corresponding road conditions.
3. The engine cold start method according to claim 1, wherein the detecting a state of charge of a vehicle battery and obtaining a coolant temperature of an engine according to the state of charge comprises:
acquiring current electric quantity information of the automobile battery;
judging whether the electric quantity of the automobile is lower than a preset electric quantity or not according to the current electric quantity information;
and if the electric quantity of the automobile is lower than the preset electric quantity, the temperature of the cooling liquid of the engine is obtained.
4. The engine cold start method according to claim 1, wherein the determining whether the engine satisfies a torque limit condition based on a coolant temperature includes:
acquiring a preset temperature, and judging whether the temperature of the cooling liquid is less than the preset temperature or not;
and if the temperature of the cooling liquid is less than the preset temperature, determining that the engine does not meet the torque limit condition.
5. The engine cold start method of claim 1, wherein said starting the engine according to a torque limit parameter and controlling a torque of the engine within the torque limit parameter comprises:
starting the engine according to the torque limiting parameter;
controlling the torque of the engine within the torque limit parameter, and distributing the output torque of the motor according to the torque of the engine after torque limit;
and controlling the motor to output corresponding torque according to the output torque.
6. The engine cold start method of claim 5, wherein starting the engine according to a torque limit parameter and controlling a torque of the engine within the torque limit parameter, further comprising:
obtaining the temperature of the cooling liquid after the torque of the engine is limited;
judging whether the engine meets a torque limit condition or not according to the temperature of the coolant after torque limit;
and if the engine meets the torque limit condition, controlling the engine to adjust the current torque to the normal output torque.
7. The engine cold start method according to claim 1, wherein the obtaining of the torque limit parameter and the controlling of the engine to output the corresponding torque according to the torque limit parameter further comprise:
acquiring the electric quantity consumption parameters after torque limitation;
and performing associated storage on the electric quantity consumption parameters subjected to the torque limitation and the corresponding torque limitation parameters.
8. An automobile, comprising: the device comprises a shell, an engine, a motor and a vehicle-mounted control terminal; the engine, the motor and the vehicle-mounted control terminal are integrated in the shell;
the vehicle-mounted control terminal comprises: a processor and a memory, the memory storing an engine cold start program, the engine cold start program when executed by the processor for implementing the engine cold start method of any one of claims 1-7.
9. A computer-readable storage medium storing an engine cold start program which when executed by a processor is configured to implement the engine cold start method according to any one of claims 1 to 7.
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| CN115285103A (en) * | 2022-07-26 | 2022-11-04 | 东风柳州汽车有限公司 | Engine control method, device, equipment and storage medium |
| CN118046885A (en) * | 2022-11-17 | 2024-05-17 | 比亚迪股份有限公司 | Engine control method, hybrid vehicle, and storage medium |
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