CN108146426B - Starting control method and device for engine of hybrid electric vehicle - Google Patents
Starting control method and device for engine of hybrid electric vehicle Download PDFInfo
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- CN108146426B CN108146426B CN201711417224.2A CN201711417224A CN108146426B CN 108146426 B CN108146426 B CN 108146426B CN 201711417224 A CN201711417224 A CN 201711417224A CN 108146426 B CN108146426 B CN 108146426B
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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
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
- B60K26/02—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
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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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Hybrid Electric Vehicles (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
the application discloses a starting control method of an engine of a hybrid electric vehicle, when the vehicle enters a driving state, an air conditioner compressor works and the engine does not work, a vehicle controller starts the engine by preferentially using a motor reverse dragging mode by judging whether the engine stalls, whether a gear is neutral or not and whether the rotating speed of the motor is reasonable or not, and only when the gear is neutral and the reverse dragging condition is not met, the mode of starting a starter can be selected to start the engine, so that the function of starting the engine by using the air conditioner is realized.
Description
Technical Field
the invention relates to the technical field of hybrid electric vehicles, in particular to a starting control method and a starting control device for an engine of a hybrid electric vehicle.
Background
hybrid power system's new forms of energy bus is more and more in the existing market, and for traditional vehicle, hybrid vehicle is structural difference has increased parts such as motor, battery, consequently hybrid vehicle has possessed the idling and has stopped the function.
When the idling start-stop function is started, if the vehicle is driven to run in a pure electric mode, the air-conditioning compressor stops working once the temperature in the vehicle reaches a set temperature under the state that the switch of the air-conditioning panel is pressed, the working state of the air-conditioning compressor is reset, the start-stop function is acted, and the engine stalls; when the engine is flamed out, the air-conditioning compressor stops working for a period of time, and the temperature in the vehicle is higher than the set temperature, the air-conditioning compressor automatically starts working, the vehicle control unit controls the engine to be started after receiving the working state of the air-conditioning compressor, and at the moment, the rotating speed of the motor is too low, and the starter starts the engine. The air conditioner compressor of the air conditioning system can work intermittently according to the temperature in the vehicle, so that the engine is frequently started by the starter, and the damage speed of the starter and parts of the starter is greatly increased.
if the idling start-stop function of the engine is closed, the engine is not stopped all the time, and the air conditioner compressor can work intermittently along with the temperature change in the vehicle, but the idling start-stop function is cancelled, the oil consumption of a power system is greatly increased, the economical efficiency of the vehicle is greatly reduced, and the competitiveness of the vehicle is greatly reduced.
Disclosure of Invention
In view of the above, the invention provides a start control method and device for an engine of a hybrid electric vehicle, which avoid the frequent start of a starter on the basis of keeping the start and stop functions of the engine, and effectively protect the starter and parts thereof.
in order to achieve the above purpose, the invention provides the following specific technical scheme:
A start control method of an engine of a hybrid vehicle includes:
When the vehicle enters a driving state, an air conditioner compressor works and an engine does not work, judging whether the current gear is a neutral gear or not;
if yes, judging whether the temperature of the engine is smaller than a preset value;
If the engine speed is less than the preset speed, controlling a starter to start the engine;
if not, controlling the motor to drag the engine reversely;
If the engine is not in the neutral gear, acquiring the current motor rotating speed, and judging whether the current motor rotating speed is in a preset range, wherein the upper limit of the preset range is the motor rotating speed corresponding to the current gear upshift point, and the lower limit of the preset range is the motor rotating speed of the engine in an idling state;
If the current time is within the preset range, controlling the motor to start the engine in a reverse dragging mode;
if the current gear is not in the preset range, returning to execute the steps of when the vehicle enters a driving state, the air conditioner switch is turned on and the engine is not operated, and judging whether the current gear is a neutral gear or not.
Preferably, before the determining whether the current gear is neutral, the method further includes:
when the vehicle enters a driving state, judging whether an air conditioner compressor is in a working state;
if the engine is not in a working state, starting the engine by adopting an idling start-stop function, wherein the start-stop control of the engine is not influenced by an air conditioner;
If the engine is in the working state, judging whether the engine works;
if the engine is operated, stopping the engine;
And if not, returning to execute the judgment of whether the current gear is the neutral gear or not.
preferably, the judging whether the air conditioner compressor is in the working state includes:
judging whether an air conditioner switch is turned on or not;
if the temperature is switched on, judging whether the current temperature reaches a preset temperature;
if not, judging that the air conditioner compressor is in a working state;
If the current working state is reached, judging that the air conditioner compressor is in a non-working state;
If not, the air conditioner compressor is judged to be in a non-working state.
Preferably, the preset temperature is preset by a driver.
A start control device of an engine of a hybrid vehicle, comprising:
The first judgment unit is used for judging whether the current gear is a neutral gear or not when the vehicle enters a driving state, the air conditioner compressor works and the engine does not work; if the gear is neutral, triggering a second judgment unit, and if the gear is not neutral, triggering a third judgment unit;
the second judging unit is used for judging whether the temperature of the engine is smaller than a preset value; if the current value is less than the preset value, triggering the first control unit, and if the current value is not less than the preset value, triggering the second control unit;
The first control unit is used for controlling the starter to start the engine;
The second control unit is used for controlling the motor to start the engine in a reverse dragging mode;
The third judging unit is used for acquiring the current motor rotating speed and judging whether the current motor rotating speed is in a preset range, wherein the upper limit of the preset range is the motor rotating speed corresponding to the current gear upshift point, and the lower limit of the preset range is the motor rotating speed in an engine idling state; if the current time is within the preset range, triggering the second control unit; and if the current time is not within the preset range, triggering the first judgment unit.
preferably, the apparatus further comprises:
the fourth judging unit is used for judging whether the air conditioner compressor is in a working state or not when the vehicle enters a driving state; if the idle speed start-stop control unit is not in the working state, triggering the idle speed start-stop control unit; if the mobile terminal is in the working state, triggering a fifth judgment unit;
the idle speed start-stop control unit is used for starting the engine by adopting an idle speed start-stop function, and the start-stop control of the engine is not influenced by an air conditioner;
The fifth judging unit is used for judging whether the engine works; and if the engine is operated, the engine is prohibited from stopping, and if the engine is not operated, the first judgment unit is triggered.
Preferably, the fourth judging unit includes:
the first judgment subunit is used for judging whether the air conditioner switch is turned on or not; if the first judgment subunit is not opened, the second judgment subunit is triggered;
the second judging subunit is configured to judge whether the current temperature reaches a preset temperature; if not, triggering a second judgment subunit; if the first judgment subunit is reached, triggering the first judgment subunit;
the second judging stator unit is used for judging that the air conditioner compressor is in a working state;
and the first judging subunit is used for judging that the air conditioner compressor is in a non-working state.
Preferably, the preset temperature is preset by a driver.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a starting control method and a device of a hybrid electric vehicle engine, when a vehicle enters a driving state, an air conditioner panel switch is turned on, when the temperature in the vehicle is higher than a set temperature, an air conditioner compressor automatically starts to work, a vehicle control unit preferentially starts the engine by using a motor reverse dragging mode under the conditions of judging whether the engine stalls, whether a gear is a neutral gear and whether the rotating speed of the motor is reasonable, only when the gear is the neutral gear and the reverse dragging condition is not satisfied, the mode of starting the starter is selected to start the engine, the function of starting the air conditioner to start the engine is realized, the probability of starting the starter is greatly reduced, the starter is prevented from being frequently started, the starter and parts thereof are effectively protected, meanwhile, when the temperature in the vehicle meets the set temperature, the starting and stopping functions of the engine can normally function, and the oil consumption is reduced to a certain extent, the economy of the vehicle is improved; in addition, the air conditioner can work normally in time once the driver has the air conditioner requirement, the problem that the driver does not respond when driving the air conditioner engine in hot weather is effectively avoided, and the driving experience of the driver and passengers is greatly improved.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for controlling the engine start of a hybrid vehicle according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating another method for controlling the engine start of a hybrid vehicle according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a start control device of a hybrid electric vehicle engine according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
referring to fig. 1, the embodiment discloses a start control method for an engine of a hybrid electric vehicle, which is applied to a vehicle controller, and specifically includes the following steps:
S101: when the vehicle enters a driving state, an air conditioner compressor works and an engine does not work, judging whether the current gear is a neutral gear or not; if yes, executing S102, and if not, executing S103;
S102: judging whether the temperature of the engine is smaller than a preset value or not; if yes, executing S104, and if not, executing S105;
s104: controlling a starter to start an engine;
S105: controlling the motor to drag reversely to start the engine;
when the vehicle enters a driving state, the air conditioner compressor works, the engine does not work and the current gear is a neutral gear, the motor is preferentially used for dragging the engine to start the engine, and the starter is used for statically starting the engine under the accidental condition that the engine is not heated.
The engine is not heated and specifically refers to: the engine temperature is less than a preset value.
The motor is dragged backwards to start the engine, specifically, the clutch is closed, and the motor-clutch-engine is connected in a rigid mode; then the torque is added to the motor, the motor has the rotating speed, and the engine is driven to rotate through the clutch.
s103: acquiring the current motor rotating speed;
s106: judging whether the current motor rotating speed is within a preset range;
and if the current time is within the preset range, executing S105, and if the current time is not within the preset range, returning to execute S101.
The upper limit of the preset range is the motor rotating speed corresponding to the current gear upshift point, and the lower limit of the preset range is the motor rotating speed in the idle state of the engine; the idle speed of the engine is a standard quantity, and each engine corresponds to an idle speed standard quantity.
The motor rotating speed corresponding to each gear upshift point is also a calibration quantity, and the motor rotating speed corresponding to the current gear upshift point can be obtained through the power assembly system configuration as long as the current gear is determined.
and if the engine is not in the preset range, returning to execute S101, delaying starting, and restarting when the engine starting condition is met when the mode switching is switched from the pure electric mode to the hybrid mode.
the starting control method of the hybrid electric vehicle engine disclosed by the embodiment is characterized in that when a vehicle enters a driving state, an air conditioner panel switch is turned on, when the temperature in the vehicle is higher than a set temperature, an air conditioner compressor automatically starts to work, a vehicle control unit preferentially starts the engine in a motor reverse dragging mode by judging whether the engine is stalled, whether a gear is neutral or not and whether the rotating speed of the motor is reasonable or not, and only when the gear is neutral and the reverse dragging condition is not met, the engine is started in a mode of selecting a starter to start the engine, so that the function of starting the air conditioner to start the engine is realized, the probability of starting the engine by the starter is greatly reduced, the starter is prevented from being frequently started, the starter and parts of the starter are effectively protected, meanwhile, when the temperature in the vehicle meets the set temperature, the starting and stopping function in the vehicle of the engine, the economy of the vehicle is improved; in addition, the air conditioner can work normally in time once the driver has the air conditioner requirement, the problem that the driver does not respond when driving the air conditioner engine in hot weather is effectively avoided, and the driving experience of the driver and passengers is greatly improved.
Referring to fig. 2, the present embodiment discloses another starting control method for an engine of a hybrid electric vehicle, which specifically includes the following steps:
s201: when the vehicle enters a driving state, judging whether an air conditioner compressor is in a working state; if not, executing S202, and if in the working state, executing S203;
specifically, the determining whether the air conditioner compressor is in the working state includes:
Judging whether an air conditioner switch is turned on or not;
if the temperature is switched on, judging whether the current temperature reaches a preset temperature; the preset temperature is preset by a driver.
if not, judging that the air conditioner compressor is in a working state;
If the current working state is reached, judging that the air conditioner compressor is in a non-working state;
if not, the air conditioner compressor is judged to be in a non-working state.
s202: the engine is started by adopting an idling start-stop function, and the start-stop control of the engine is not influenced by an air conditioner;
s203: judging whether the engine works; if the work is done, executing S204, if the work is not done, executing S205;
s204: prohibiting the engine from stopping;
S205: judging whether the current gear is a neutral gear or not; if yes, executing S206, and if not, executing S207;
s206: judging whether the temperature of the engine is smaller than a preset value or not; if yes, executing S208, and if not, executing S209;
S208: controlling a starter to start an engine;
s209: controlling the motor to drag reversely to start the engine;
S207: acquiring the current motor rotating speed;
s210: judging whether the current motor rotating speed is within a preset range;
The upper limit of the preset range is the motor rotating speed corresponding to the current gear upshift point, and the lower limit of the preset range is the motor rotating speed in the idle state of the engine;
If the current time is within the preset range, executing the step S209, and if the current time is not within the preset range, returning to the step S205.
according to the starting control method of the engine of the hybrid electric vehicle disclosed by the embodiment, when the vehicle enters a driving state and an air conditioner compressor is in a non-working state, starting and stopping control of the engine is not influenced by an air conditioner, and the engine is started by adopting the conventional idling starting and stopping function; when the vehicle enters a driving state and the air conditioner compressor is in a working state, the engine is started by preferentially using a motor reverse dragging mode, and the engine is started by selecting a starter starting mode only when the gear is in a neutral gear and the reverse dragging condition is not met. The existing vehicle equipment does not need to be changed, the function of starting the air conditioner to start the engine is realized on the basis of keeping the starting and stopping functions of the engine through a control strategy, and the frequent starting of the starter is avoided.
Referring to fig. 3, the present embodiment correspondingly discloses a start control device for an engine of a hybrid electric vehicle, which includes:
the first judging unit 301 is configured to judge whether a current gear is a neutral gear when the vehicle enters a driving state, the air conditioner compressor works, and the engine does not work; if the gear is neutral, triggering a second judging unit 302, and if the gear is not neutral, triggering a third judging unit 303;
the second judging unit 302 is configured to judge whether the engine temperature is less than a preset value; if the current value is less than the preset value, the first control unit 304 is triggered, and if the current value is not less than the preset value, the second control unit 305 is triggered;
a first control unit 304 for controlling a starter to start the engine;
a second control unit 305 for controlling the motor to start the engine by reverse dragging;
the third determining unit 303 is configured to obtain a current motor rotation speed, and determine whether the current motor rotation speed is within a preset range, where an upper limit of the preset range is a motor rotation speed corresponding to a current gear upshift point, and a lower limit of the preset range is a motor rotation speed in an engine idle state; if the current time is within the preset range, triggering the second control unit; and if the current time is not within the preset range, triggering the first judgment unit.
Preferably, the apparatus further comprises:
the fourth judging unit is used for judging whether the air conditioner compressor is in a working state or not when the vehicle enters a driving state; if the idle speed start-stop control unit is not in the working state, triggering the idle speed start-stop control unit; if the mobile terminal is in the working state, triggering a fifth judgment unit;
the idle speed start-stop control unit is used for starting the engine by adopting an idle speed start-stop function, and the start-stop control of the engine is not influenced by an air conditioner;
the fifth judging unit is used for judging whether the engine works; and if the engine is operated, the engine is prohibited from stopping, and if the engine is not operated, the first judgment unit is triggered.
preferably, the fourth judging unit includes:
The first judgment subunit is used for judging whether the air conditioner switch is turned on or not; if the first judgment subunit is not opened, the second judgment subunit is triggered;
the second judging subunit is configured to judge whether the current temperature reaches a preset temperature; the preset temperature is preset by a driver.
if not, triggering a second judgment subunit; if the first judgment subunit is reached, triggering the first judgment subunit;
the second judging stator unit is used for judging that the air conditioner compressor is in a working state;
and the first judging subunit is used for judging that the air conditioner compressor is in a non-working state.
the starting control device of the hybrid electric vehicle engine disclosed by the embodiment turns on the switch of the air conditioner panel when the vehicle enters a driving state, when the temperature in the vehicle is higher than a set temperature, the air conditioner compressor automatically starts to work, the vehicle control unit starts the engine by preferentially using a motor reverse dragging mode under the conditions of judging whether the engine is stalled, whether the gear is neutral or not and whether the rotating speed of the motor is reasonable or not, and the engine is started by selecting a mode of starting the starter only when the gear is neutral and the reverse dragging condition is not met, so that the function of starting the air conditioner to start the engine is realized, the probability of starting the engine by the starter is greatly reduced, the starter is prevented from being frequently started, the starter and parts thereof are effectively protected, meanwhile, the normal function of starting and stopping the engine in the vehicle can be realized when the temperature in the vehicle meets the set temperature, and the, the economy of the vehicle is improved; in addition, the air conditioner can work normally in time once the driver has the air conditioner requirement, the problem that the driver does not respond when driving the air conditioner engine in hot weather is effectively avoided, and the driving experience of the driver and passengers is greatly improved.
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. a start control method of an engine of a hybrid vehicle, characterized by comprising:
When the vehicle enters a driving state, an air conditioner compressor works and an engine does not work, judging whether the current gear is a neutral gear or not;
If yes, judging whether the temperature of the engine is smaller than a preset value;
if the engine speed is less than the preset speed, controlling a starter to start the engine;
if not, controlling the motor to drag the engine reversely;
if the engine is not in the neutral gear, acquiring the current motor rotating speed, and judging whether the current motor rotating speed is in a preset range, wherein the upper limit of the preset range is the motor rotating speed corresponding to the current gear upshift point, and the lower limit of the preset range is the motor rotating speed of the engine in an idling state;
If the current time is within the preset range, controlling the motor to start the engine in a reverse dragging mode;
if the current gear is not in the preset range, returning to execute the steps of when the vehicle enters a driving state, the air conditioner switch is turned on and the engine is not operated, and judging whether the current gear is a neutral gear or not.
2. the method of claim 1, wherein prior to said determining whether the current gear is neutral, the method further comprises:
when the vehicle enters a driving state, judging whether an air conditioner compressor is in a working state;
if the engine is not in a working state, starting the engine by adopting an idling start-stop function, wherein the start-stop control of the engine is not influenced by an air conditioner;
If the engine is in the working state, judging whether the engine works;
if the engine is operated, stopping the engine;
and if not, returning to execute the judgment of whether the current gear is the neutral gear or not.
3. The method of claim 2, wherein the determining whether the air conditioner compressor is in an operating state comprises:
judging whether an air conditioner switch is turned on or not;
If the temperature is switched on, judging whether the current temperature reaches a preset temperature;
if not, judging that the air conditioner compressor is in a working state;
If the current working state is reached, judging that the air conditioner compressor is in a non-working state;
if not, the air conditioner compressor is judged to be in a non-working state.
4. the method of claim 3, wherein the preset temperature is preset by a driver.
5. A start control device of an engine of a hybrid vehicle, characterized by comprising:
the first judgment unit is used for judging whether the current gear is a neutral gear or not when the vehicle enters a driving state, the air conditioner compressor works and the engine does not work; if the gear is neutral, triggering a second judgment unit, and if the gear is not neutral, triggering a third judgment unit;
the second judging unit is used for judging whether the temperature of the engine is smaller than a preset value; if the current value is less than the preset value, triggering the first control unit, and if the current value is not less than the preset value, triggering the second control unit;
the first control unit is used for controlling the starter to start the engine;
The second control unit is used for controlling the motor to start the engine in a reverse dragging mode;
The third judging unit is used for acquiring the current motor rotating speed and judging whether the current motor rotating speed is in a preset range, wherein the upper limit of the preset range is the motor rotating speed corresponding to the current gear upshift point, and the lower limit of the preset range is the motor rotating speed in an engine idling state; if the current time is within the preset range, triggering the second control unit; and if the current time is not within the preset range, triggering the first judgment unit.
6. The apparatus of claim 5, further comprising:
the fourth judging unit is used for judging whether the air conditioner compressor is in a working state or not when the vehicle enters a driving state; if the idle speed start-stop control unit is not in the working state, triggering the idle speed start-stop control unit; if the mobile terminal is in the working state, triggering a fifth judgment unit;
the idle speed start-stop control unit is used for starting the engine by adopting an idle speed start-stop function, and the start-stop control of the engine is not influenced by an air conditioner;
the fifth judging unit is used for judging whether the engine works; and if the engine is operated, the engine is prohibited from stopping, and if the engine is not operated, the first judgment unit is triggered.
7. The apparatus according to claim 6, wherein the fourth determination unit comprises:
The first judgment subunit is used for judging whether the air conditioner switch is turned on or not; if the first judgment subunit is not opened, the second judgment subunit is triggered;
The second judging subunit is configured to judge whether the current temperature reaches a preset temperature; if not, triggering a second judgment subunit; if the first judgment subunit is reached, triggering the first judgment subunit;
the second judging stator unit is used for judging that the air conditioner compressor is in a working state;
and the first judging subunit is used for judging that the air conditioner compressor is in a non-working state.
8. The apparatus of claim 7, wherein the preset temperature is preset by a driver.
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| CN201711417224.2A CN108146426B (en) | 2017-12-25 | 2017-12-25 | Starting control method and device for engine of hybrid electric vehicle |
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| CN201711417224.2A CN108146426B (en) | 2017-12-25 | 2017-12-25 | Starting control method and device for engine of hybrid electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111055835B (en) * | 2018-10-16 | 2021-04-02 | 广州汽车集团股份有限公司 | Idle speed control method and system of hybrid power vehicle |
| CN110254428A (en) * | 2019-05-22 | 2019-09-20 | 中国第一汽车股份有限公司 | A kind of automatic on-off control method of 48V hybrid vehicle |
| CN110686901B (en) * | 2019-09-29 | 2021-06-22 | 潍柴动力股份有限公司 | Control method and device for engine pilot injection |
| CN113879275B (en) * | 2021-09-29 | 2023-06-27 | 奇瑞汽车股份有限公司 | Engine starting method and device |
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