CN110848068B - Engine starting control method and system and vehicle - Google Patents
Engine starting control method and system and vehicle Download PDFInfo
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- CN110848068B CN110848068B CN201910730414.2A CN201910730414A CN110848068B CN 110848068 B CN110848068 B CN 110848068B CN 201910730414 A CN201910730414 A CN 201910730414A CN 110848068 B CN110848068 B CN 110848068B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0848—Circuits or control means specially adapted for starting of engines with means for detecting successful engine start, e.g. to stop starter actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
Abstract
The embodiment of the invention discloses an engine starting control method, an engine starting control system and a vehicle. The method comprises the following steps: the vehicle control unit obtains the current working condition of a target vehicle, determines a starting mode corresponding to an engine according to the current working condition, sends starting information corresponding to the starting mode to an engine controller, and controls the engine to start according to the received starting information. Compared with the prior art, the embodiment of the invention can select a proper engine starting mode according to the working condition corresponding to the target vehicle, and solves the problem that the normal starting of the engine cannot be ensured when the vehicle is in an extreme working condition or some systems have faults due to a single starting mode in the prior art.
Description
Technical Field
The embodiment of the invention relates to the technical field of engine starting, in particular to an engine starting control method, an engine starting control system and a vehicle.
Background
The starting mode of the engine mainly comprises starter starting and motor starting, and different starting modes have different applied working conditions and characteristics, for example, the starter starting mode needs the electric quantity of a low-voltage storage battery to be sufficient, vibration and noise are accompanied in the starting process of the engine, and the comfort of a user is poor. The starting mode of the motor needs the sufficient electric quantity of the high-voltage storage battery, the temperature cannot be too low, the starting time of the engine is short, and the comfort of a user is good.
At present, however, each host factory in China has a single starting mode for the engine, namely, the engine is started by adopting either a starter or a motor, so that when a vehicle is in an extreme working condition or some systems are in failure, the normal starting of the engine cannot be ensured, and the use of users is influenced.
Disclosure of Invention
The embodiment of the invention provides an engine starting control method, an engine starting control system and a vehicle, and aims to solve the problem that normal starting of an engine cannot be guaranteed when the vehicle is in an extreme working condition or some systems have faults due to a single starting mode in the prior art.
In a first aspect, an embodiment of the present invention provides an engine start control method, including:
the vehicle control unit acquires the current working condition of a target vehicle;
the vehicle control unit determines a starting mode corresponding to the engine according to the current working condition, and sends starting information corresponding to the starting mode to the engine controller;
the engine controller controls the engine to start according to the received start information.
In a second aspect, an embodiment of the present invention further provides an engine start control system, including:
the vehicle control unit is used for acquiring the current working condition of a target vehicle, determining a starting mode corresponding to the engine according to the current working condition and sending starting information corresponding to the starting mode to the engine controller;
an engine controller for controlling the engine to start based on the received start information.
In a third aspect, an embodiment of the present invention further provides a vehicle, including: engine, motor, starter, high-voltage battery, low-voltage battery and memory still include: the engine start control system according to the second aspect may execute the engine start control method according to the first aspect.
The embodiment of the invention provides an engine starting control method, an engine starting control system and an engine starting control vehicle. Compared with the prior art, the embodiment of the invention can select a proper engine starting mode according to the working condition corresponding to the target vehicle, and solves the problem that the normal starting of the engine cannot be ensured when the vehicle is in an extreme working condition or some systems have faults due to a single starting mode in the prior art.
Drawings
FIG. 1 is a flowchart of an engine start control method according to an embodiment of the present invention;
FIG. 2 is a flowchart of an engine start control method according to a second embodiment of the present invention;
FIG. 3 is a flowchart of an engine start control method corresponding to a torque-controlled starter start in a starting manner according to a third embodiment of the present invention;
FIG. 4 is a timing diagram illustrating engine starting with a torque-controlled starter according to a third embodiment of the present invention;
fig. 5 is a flowchart of an engine start control method corresponding to the starting of the starter controlled by the rotation speed according to a third starting mode provided by the third embodiment of the present invention;
FIG. 6 is a timing chart illustrating engine starting by a starter with speed control according to a third embodiment of the present invention;
fig. 7 is a flowchart of an engine start control method corresponding to a motor direct start in a starting manner according to a third embodiment of the present invention;
FIG. 8 is a timing diagram illustrating a direct motor start engine according to a third embodiment of the present invention;
fig. 9 is a flowchart of an engine start control method in which an engine auxiliary motor is started according to a third starting manner provided by the third embodiment of the present invention;
fig. 10 is a timing chart of an engine auxiliary motor starting engine according to a third embodiment of the present invention;
fig. 11 is a flowchart of an engine start control method in which a starting manner is a motor-simulated starter start according to a third embodiment of the present invention;
FIG. 12 is a timing diagram illustrating a motor-simulated starter to start an engine according to a third embodiment of the present invention;
fig. 13 is a structural diagram of an engine start control system according to a fourth embodiment of the present invention;
fig. 14 is a structural diagram of a vehicle according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. In addition, the embodiments and features of the embodiments in the present invention may be combined with each other without conflict.
Example one
Fig. 1 is a flowchart of an engine start control method according to an embodiment of the present invention, where the embodiment is applicable to an engine start situation, especially a start situation of an engine of a hybrid vehicle, and the method may be executed by an engine start control system, which may be integrated in the vehicle, and specifically, the method includes the following steps:
s11, the vehicle control unit obtains the current working condition of the target vehicle.
A Hybrid Control Unit (HCU) is a core Control component of a Hybrid vehicle, and has functions of management, torque coordination and distribution, motor battery coordination management, and the like. The current working condition is the current environment of the target vehicle or the conditions of the reference components, in practical application, the selected reference components are different, and the current working condition of the target vehicle is different, for example, components such as a temperature sensor, a high-voltage battery, a motor, a starter and a low-voltage battery can be selected as the reference components. The HCU can monitor the information of the reference component in real time, and can determine the current working condition of the target vehicle according to the monitoring result, for example, the current working condition can be at least one of low temperature, high-voltage battery failure, motor failure, serious shortage of electric quantity of the high-voltage battery and starter failure. The temperature sensor is used for detecting the ambient temperature of the target vehicle or the water temperature of an engine water tank.
And S12, the vehicle control unit determines a starting mode corresponding to the engine according to the current working condition, and sends starting information corresponding to the starting mode to the engine controller.
The starting mode is a mode for controlling the starting of the engine, and comprises a mode of starting a starter, a mode of starting a motor and the like. The starter is started firstly, and then the starter drags the engine to drive the engine to start. The motor is started first, and then the motor drags the engine to drive the engine to start. Different starting modes correspond to different working conditions, for example, the starter needs to start the electric quantity of the low-voltage battery, and if the starter is adopted to start the engine, the electric quantity of the low-voltage battery needs to be ensured to be sufficient. Because the starting mode has obvious intervention action of the starter, obvious vehicle vibration and noise are generated in the starting process of the engine, the comfort of a user is poor, and the starting time is long. The motor needs the electric quantity of a high-voltage battery for starting, and is not suitable for working in a low-temperature environment, particularly in winter, but the starting mode has short starting time, and a user basically cannot feel vibration and noise in the starting process of the engine, so that the comfortable feeling is better.
The conventional hybrid vehicle only has a single starting mode, namely only has starter starting or motor starting, so that when the vehicle is in different working conditions, the starting mode corresponding to the working conditions cannot be selected, and the use of a user is influenced. For example, the engine start method provided in a hybrid vehicle is motor start, and when the electric quantity of a high-voltage battery on the vehicle is insufficient or the ambient temperature is low, the success of the engine start cannot be guaranteed by starting the engine with the motor. The embodiment can select corresponding starting modes in different working conditions, for example, when the vehicle is in a low-temperature environment, a starter can be adopted for starting, and the probability of low-temperature starting failure is reduced.
Because different working conditions correspond to different starting modes, each working condition and the corresponding starting mode of the engine can be stored in a relevant mode. In practical application, after the HCU determines the current working condition corresponding to the target vehicle according to the monitoring result, the stored associated information table is searched, and then the starting mode corresponding to the current working condition can be determined. After determining the starting mode corresponding to the current working condition, the HCU generates corresponding starting information according to the starting mode, and sends the starting information to an Engine Controller (ECU) so that the ECU controls the Engine to start according to the starting information, wherein the starting information is information for controlling the Engine to start, and the specific contents of the starting information corresponding to different starting modes are different, for example, the starting information corresponding to the starting mode of the starter may be a starting request of the starter, a target rotating speed, Engine enabling information and the like, the starting request of the starter is used for starting the starter, the target rotating speed is a rotating speed which the Engine needs to reach when the Engine is successfully started, and the Engine enabling information is used for controlling fuel injection and ignition so that the rotating speed of the Engine reaches the target rotating speed.
And S13, controlling the engine to start according to the received starting information by the engine controller.
Specifically, the ECU generates a corresponding starting instruction according to the received starting information, and controls the engine to start according to the starting instruction. Illustratively, the HCU determines the starting mode of the target vehicle engine to be starter starting, the starting information comprises a starter starting request, engine enabling information, a target rotating speed and rotating speed control information, the ECU respectively generates a corresponding starter starting instruction, an engine enabling instruction and a rotating speed control instruction according to the received starting information, then controlling a starter to start according to the engine starting command, the engine enabling command and the rotating speed control command, dragging the engine to increase the rotating speed of the engine, when the rotating speed of the engine reaches a set threshold value, the fuel injection ignition can be controlled, the engine can quickly respond to the requirement of the target rotating speed, when the rotating speed of the engine reaches the target rotating speed, the engine is successfully started, the set threshold may be set as needed, and the embodiment is not limited, and may be set to 200 rpm, for example.
The embodiment of the invention provides an engine starting control method, which comprises the steps of obtaining the current working condition of a target vehicle through a vehicle control unit, determining a starting mode corresponding to an engine by the vehicle control unit according to the current working condition, sending starting information corresponding to the starting mode to an engine controller, and controlling the engine to start according to the received starting information by the engine controller. Compared with the prior art, the embodiment of the invention can select a proper engine starting mode according to the working condition corresponding to the target vehicle, and solves the problem that the normal starting of the engine cannot be ensured when the vehicle is in an extreme working condition or some systems have faults due to a single starting mode in the prior art.
Example two
Fig. 2 is a flowchart of an engine start control method according to a second embodiment of the present invention, which is embodied on the basis of the second embodiment, and specifically includes the following steps:
s21, the vehicle control unit obtains the current working condition of the target vehicle.
HCU confirms current operating mode according to the testing result such as high voltage battery, motor, starter, low voltage battery and ambient temperature, and is specific, and the current operating mode of this embodiment includes: the electric quantity of the high-voltage battery is smaller than at least one of a first preset value, a motor or high-voltage battery is in fault, the electric quantity of the low-voltage battery is smaller than a second preset value, a starter is in fault, the ambient temperature is smaller than a preset threshold value and the rotating speed is synchronous, wherein the first preset value is a critical point that the electric quantity of the high-voltage battery is seriously insufficient, and if the electric quantity of the high-voltage battery is detected to be smaller than the first preset value, the electric quantity of the high-voltage battery is seriously insufficient. The second preset value is a critical point of insufficient electric quantity of the low-voltage battery, and if the electric quantity of the low-voltage battery is detected to be smaller than the second preset value, the electric quantity of the low-voltage battery is indicated to be insufficient. The third preset value is a critical point at which the electric quantity of the high-voltage battery is lower, and if the electric quantity is detected to be larger than the first preset value and smaller than the third preset value, the electric quantity of the high-voltage battery is lower. The first preset value is smaller than the third preset value, and the magnitudes of the first preset value and the third preset value may be determined according to the performance of the high-voltage battery, which is not limited in the embodiments. The second preset value may be determined according to the performance of the low-voltage battery, and the embodiment is not limited.
S22, whether the vehicle control unit detects that the electric quantity of the high-voltage battery on the target vehicle is smaller than a first preset value or has an acceleration requirement is judged, if yes, S23 is executed, and if not, S28 is executed.
After the HCU determines the current working condition, the starting mode corresponding to the current working condition can be determined by searching the association information table. The starting mode of the embodiment comprises the following steps: at least one of a torque controlled starter to start the engine, a speed controlled starter to start the engine, a motor to directly start the engine, an engine to assist the motor to start the engine, and a motor to simulate a starter to start the engine. The torque-controlled starter-started engine and the speed-controlled starter-started engine are collectively referred to as starter starting, and the motor direct-start engine and the engine-assisted motor-started engine are collectively referred to as motor starting. When the engine is started by the motor, the power required by starting shares the output torque of the motor, and the power acceleration characteristic is poor. And when the starter starts the running, if the acceleration requirement of the user is detected, the engine can be started by using the starter.
The torque control starter is started by dragging the rotating speed of an engine to reach a calibrated value through the starter, then controlling oil injection ignition to enable the torque of the engine to respond to a target torque, and when the torque of the engine reaches the target torque, the engine is started successfully, and the starting mode is quick in response and needs to ensure that the electric quantity of a low-voltage battery is sufficient. The speed controlled starter starts the engine similar to the torque controlled starter starting by controlling the speed of the engine to reach a target speed and by starting the starter slower than the torque controlled starter. The motor directly starts the engine by directly dragging the engine to start, and the starting mode needs to ensure that the electric quantity of the high-voltage battery is sufficient and the motor can normally work. The engine is started by the auxiliary motor of the engine, the motor drags the engine, and simultaneously, the fuel injection ignition of the engine is controlled, so that the engine does work in advance, and the auxiliary starting is realized. The motor simulation starter is used for starting the engine, namely the motor is used for dragging the engine, and when the rotating speed of the engine reaches a set value, oil injection ignition can be controlled, so that the rotating speed of the engine is increased, and starting is completed.
Specifically, if the HCU detects that the electric quantity of the high-voltage battery is smaller than a first preset value or an acceleration demand exists, starting of a starter or starting of a motor simulation starter may be considered, and then the low-voltage battery and the starter are further detected to determine a proper starting mode. If the electric quantity of the high-voltage battery is larger than or equal to the first preset value, the starting by the motor can be considered, and then whether the electric quantity of the high-voltage battery is smaller than a third preset value or not is further detected, and a proper starting mode is determined.
And S23, judging whether the electric quantity of the low-voltage battery is smaller than a second preset value or whether the starter fails or not by the vehicle control unit, if so, executing S24, and otherwise, executing S25.
And if the HCU detects that the electric quantity of the high-voltage battery is smaller than a first preset value or an acceleration requirement exists, further detecting the electric quantity of the low-voltage battery and a starter. Specifically, if the electric quantity of the low-voltage battery is detected to be smaller than the second preset value, it is indicated that the electric quantity of the low-voltage battery is seriously insufficient, and it cannot be ensured that the starter can successfully start the engine, and if the starter fault is detected, it is indicated that the engine cannot be started by using the starter, so that it can be determined that the current working condition is that the electric quantity of the high-voltage battery is smaller than the first preset value or there is an acceleration demand, and when the electric quantity of the low-voltage battery is smaller than the second preset value or the starter fault occurs, the corresponding engine starting mode is that the motor simulates the starter to start the engine, that is, the motor simulates the starter to drive the engine to start. It should be noted that the motor normally operates in the current operating condition. If the electric quantity of the low-voltage battery is detected to be larger than or equal to the second preset value and the starter is normal, starting by the starter can be considered, and whether the environment temperature and the rotating speed synchronization requirement exist or not can be further detected, so that a proper starting mode is determined.
And S24, the vehicle control unit determines that the starting mode of the engine is that a motor simulates a starter to start the engine.
When the HCU detects that the electric quantity of the high-voltage battery is smaller than the first preset value or there is an acceleration demand and the electric quantity of the low-voltage battery is smaller than the second preset value or a starter fault, it may be determined that the starting mode of the engine is the motor-simulated starter starting, and the specific process has been described above and will not be described herein again. It should be noted that the motor normally operates in this operating condition.
S25, whether the vehicle control unit detects that the rotating speed synchronization requirement exists or the environment temperature is smaller than a preset threshold value or not is judged, if yes, S26 is executed, and if not, S27 is executed.
The rotation speed synchronization is to keep the rotation speed of the motor, the rotation speed of the engine and the rotation speed of the clutch consistent, and can be determined according to input operation of a user. Specifically, when the electric quantity of the low-voltage battery is detected to be greater than or equal to a second preset value and the starter is normal, the starter is indicated to be available for starting the engine, at this time, whether a rotating speed synchronization requirement exists or whether an ambient temperature or a water temperature of a water tank exists needs to be further detected, if the rotating speed synchronization requirement exists or the ambient temperature or the water temperature is detected to be smaller than a preset threshold value, the starting mode is determined to be that the rotating speed is used for controlling the starter to start, and if the rotating speed synchronization requirement exists or the ambient temperature or the water temperature is detected to be smaller than the preset threshold value, the starting mode is determined to be that the torque is used for controlling the starter to start. The preset threshold may be set as needed, and the embodiment is not limited. Because the difference between the ambient temperature and the water temperature of the water tank is small before the engine is started, only the ambient temperature or the water temperature of the water tank can be detected during detection.
And S26, the vehicle control unit determines that the starting mode of the engine is that the rotating speed is controlled by a starter to start the engine.
When the HCU detects that the electric quantity of the high-voltage battery is smaller than a first preset value or has an acceleration requirement, the electric quantity of the low-voltage battery is larger than or equal to a second preset value, the starter is normal, and has a rotating speed synchronization requirement or the environmental temperature is smaller than a preset threshold value, the starting mode of the engine can be determined to be that the rotating speed is controlled to control the starter to start the engine.
And S27, the vehicle control unit determines that the starting mode of the engine is a torque control starter to start the engine.
When the HCU detects that the electric quantity of the high-voltage battery is smaller than a first preset value or has an acceleration requirement, the electric quantity of the low-voltage battery is larger than or equal to a second preset value, the starter is normal but has no rotating speed synchronization requirement or the ambient temperature is larger than or equal to a preset threshold value, the starting mode of the engine can be determined to be that the engine is started by the torque control starter.
And S28, judging whether the electric quantity of the high-voltage battery on the target vehicle is larger than a first preset value and smaller than a third preset value or not by the vehicle control unit, if so, executing S29, and otherwise, executing S210.
If the electric quantity of the high-voltage battery is detected to be larger than the first preset value and no acceleration requirement exists, whether the electric quantity of the high-voltage battery is smaller than a third preset value needs to be further detected to determine whether the motor can be selected to directly start the engine.
And S29, the vehicle control unit determines that the starting mode of the engine is that the engine auxiliary motor starts the engine.
Specifically, if it is detected that the electric quantity of the high-voltage battery is greater than the first preset value but less than the third preset value, it indicates that the electric quantity of the high-voltage battery is low and cannot meet the electric quantity requirement of the motor for directly starting the engine, and the engine can be selected to assist the motor to start the engine.
S210, the vehicle control unit determines that the starting mode of the engine is that the motor directly starts the engine.
If the electric quantity of the high-voltage battery is detected to be larger than or equal to the third preset value, the electric quantity of the high-voltage battery is sufficient, and the motor can be selected to directly start the engine.
It should be noted that the working conditions shown in this embodiment are usually some extreme conditions, and in practical application, there may not be the above-mentioned conditions, and if it is detected that all the reference components are in normal operation, a suitable starting manner may be selected according to the needs of the user, for example, some users may want to respond quickly, may select a torque controller starter to start, some users may want to save oil, and may select a motor to start directly.
And S211, the vehicle control unit sends the starting information corresponding to the starting mode to an engine controller.
After the starting mode is determined, the HCU may send the starting information corresponding to the starting mode to the ECU, and the ECU controls the engine to start according to the starting information.
And S212, controlling the engine to start according to the received starting information by the engine controller.
On the basis of the embodiment, the embodiment of the invention provides five starting modes which respectively correspond to different working conditions, and after the HCU determines the current working conditions according to the detection results of the high-voltage battery, the motor, the starter, the low-voltage battery, the ambient temperature and the like, the proper starting mode can be determined according to the current working conditions, so that the defect that the engine can not be successfully started when a vehicle is in an extreme working condition due to single starting mode in the prior art is overcome, the characteristics of starting speed, economy, dynamic property and the like are fully considered, and the starting requirements of different users are met.
EXAMPLE III
Fig. 3 is a flowchart of an engine start control method in which a starting manner corresponds to torque control starter starting according to a third embodiment of the present invention, and the present embodiment is embodied by "the vehicle control unit sends start information corresponding to the starting manner to an engine controller" and "the engine controller controls the engine to start according to received start information" based on the above embodiment, specifically, the method includes the following steps:
s31, the vehicle control unit obtains the current working condition of the target vehicle.
And S32, determining a starting mode corresponding to the engine by the vehicle control unit according to the current working condition.
S33, when the vehicle control unit determines that the starting mode corresponding to the engine is a torque control starter to start the engine, the vehicle control unit determines the target torque of the engine according to the starting mode.
The target torque is the torque required to be achieved when the engine is started successfully, the specific magnitude can be set according to actual requirements, and the embodiment is not limited.
And S34, the vehicle control unit sends a starter starting request, a target torque, engine enabling information and torque control information to the engine controller.
The engine enabling information is used for controlling oil injection ignition so that the torque of the engine reaches the target torque. The torque control information is used to control the torque of the engine. Specifically, after the HCU determines the starting mode, the HCU transmits a target torque, a starter start request, engine enable information, and torque control information corresponding to the starting mode to the ECU.
And S35, the engine controller respectively generates a corresponding starter starting instruction, an engine enabling instruction and a torque control instruction according to the received starter starting request, the received engine enabling information and the received torque control information.
And the ECU respectively generates corresponding starter starting instructions, engine enabling instructions and torque control instructions according to the received starter starting requests, the received engine enabling information and the received torque control information so as to control the engine to start according to the starter starting instructions, the received engine enabling instructions and the received torque control information.
And S36, controlling the starter to start and drag the engine by the engine controller according to the starter starting command, the engine enabling command and the torque control command so as to increase the rotating speed of the engine.
Specifically, the ECU controls the starter to start according to the starter starting command, and drags the engine to increase the rotating speed of the engine.
S37, when the rotation speed of the engine is larger than or equal to a first rotation speed threshold value, the engine controller enables control over fuel injection ignition so that the engine can respond to the target torque demand.
And the ECU is also used for monitoring the rotating speed of the engine, and enabling to control the fuel injection ignition according to the engine enabling instruction when the rotating speed of the engine is greater than or equal to a first rotating speed threshold value, so that the engine can quickly respond to the target torque demand.
S38, when the torque of the engine is larger than or equal to the target torque, the engine is started successfully.
Specifically, when the rotation speed of the engine is greater than or equal to a first rotation speed threshold value, the ECU controls the fuel injection ignition, the engine is started, and when the torque of the engine is greater than or equal to a target torque, the engine is started successfully. Exemplarily, referring to fig. 4, fig. 4 is a timing chart of starting an engine by using a torque-controlled starter according to a third embodiment of the present invention, where "0" indicates no operation, and "1" indicates operation, as shown in fig. 4, an ECU controls starting of the starter according to a starter start command, and drags the engine after starting of the starter, so as to increase a rotation speed of the engine, when the rotation speed of the engine reaches a first rotation speed threshold, that is, a point B in fig. 4, the starter is deactivated, the ECU controls fuel injection and ignition according to an engine enable command, so that the engine performs work by its own fuel injection and ignition, at this time, the engine is started in a state of Run, and when the torque of the engine reaches a target torque, the engine is successfully started. In fig. 4, the rotational speed control command is 0, and torque control is shown. Run indicates that the engine is started, i.e. injection ignition, and when the torque or the rotating speed of the engine reaches the target torque or the target rotating speed, the starting is successful, i.e. the state of the engine in fig. 4 is "1", and the other starting modes are similar.
On the basis of the foregoing embodiment, referring to fig. 5, fig. 5 is a flowchart of an engine start control method corresponding to a start mode of a rotating speed control starter provided by a third embodiment of the present invention, where S41 and S42 are kept unchanged, and the "vehicle controller sends start information corresponding to the start mode to an engine controller" and "the engine controller controls the engine to start according to the received start information" may further be embodied as:
s43, when the vehicle control unit determines that the starting mode corresponding to the engine is the rotating speed control starter to start the engine, the vehicle control unit determines the target rotating speed of the engine according to the starting mode.
The target rotation speed is the rotation speed which needs to be reached when the engine is started successfully, the specific size can be set according to actual needs, and the embodiment is not limited, and for example, the target rotation speed may be 1200 revolutions per minute.
And S44, the vehicle control unit sends a starter starting request, a target rotating speed, engine enabling information and rotating speed control information to the engine controller.
The engine enabling information is used for controlling oil injection ignition so that the rotating speed of the engine reaches the target rotating speed. The rotational speed control information is used to control the rotational speed of the engine. Specifically, after the HCU determines the starting mode, the HCU sends a target rotation speed, a starter start request, engine enable information, and rotation speed control information corresponding to the starting mode to the ECU.
And S45, the engine controller respectively generates a corresponding starter starting instruction, an engine enabling instruction and a corresponding rotating speed control instruction according to the received starter starting request, the target rotating speed, the engine enabling information and the rotating speed control information.
And the ECU respectively generates corresponding starter starting instructions, engine enabling instructions and rotating speed control instructions according to the received starter starting request, the received engine enabling information and the received rotating speed control information so as to control the engine to start according to the starter starting instructions, the received engine enabling information and the received rotating speed control information.
And S46, controlling the starter to start and drag the engine by the engine controller according to the starter starting command, the engine enabling command and the rotating speed control command so as to increase the rotating speed of the engine.
This process is similar to the process corresponding to torque controlled starter start and is not described in detail herein.
S47, when the rotation speed of the engine is larger than or equal to a first rotation speed threshold value, the engine controller enables control over fuel injection ignition so that the engine can respond to the requirement of the target rotation speed.
This process is similar to the process corresponding to torque controlled starter start and is not described in detail herein.
S48, when the rotating speed of the engine is larger than or equal to the target rotating speed, the engine is started successfully.
Specifically, when the rotational speed of the engine is greater than or equal to the target rotational speed, the engine start is successful. Exemplarily, referring to fig. 6, fig. 6 is a timing chart of starting an engine by using a rotation speed control starter according to a third embodiment of the present invention. As shown in fig. 6, the ECU controls the starter to start according to the starter starting instruction, the starter is started to drag the engine to increase the rotation speed of the engine, when the rotation speed of the engine reaches a first rotation speed threshold value, i.e., point a in fig. 6, the starter stops working, the ECU controls the injection ignition according to the engine enabling instruction to make the engine work by the injection ignition of the engine, at this time, the engine is started, the state is Run, and when the rotation speed of the engine reaches the target rotation speed, the engine is successfully started.
On the basis of the foregoing embodiment, referring to fig. 7, fig. 7 is a flowchart of an engine start control method corresponding to a direct start of a motor in a start manner provided by a third embodiment of the present invention, where S51 and S52 remain unchanged, the "vehicle controller sends start information corresponding to the start manner to an engine controller", and the "engine controller controls the engine to start according to the received start information" may be further embodied:
s53, when the vehicle control unit determines that the starting mode corresponding to the engine is that the motor directly starts the engine, the vehicle control unit controls the motor and the clutch to work, and controls the motor to drag the engine so as to increase the rotating speed of the engine.
Specifically, when the HCU determines that the starting mode of the engine is direct motor starting, the motor and the clutch are controlled to work, and the motor is controlled to drag the engine, so that the rotating speed of the engine is increased.
S54, when the rotating speed of the engine is larger than or equal to a second rotating speed threshold value, the vehicle control unit sends engine enabling information to the engine controller.
When the rotating speed of the engine reaches a second rotating speed threshold value, the HCU sends engine enabling information to the ECU, so that the ECU controls fuel injection and ignition according to the received engine enabling information. The second rotational speed threshold is greater than the first rotational speed threshold, typically a higher rotational speed, for example 1200 revolutions/min.
And S55, generating an engine enabling instruction by the engine controller according to the received engine enabling information.
And S56, enabling the engine controller to control injection ignition according to the engine enabling instruction, and successfully starting the engine.
And when the rotating speed of the engine is greater than or equal to the second rotating speed threshold value, the ECU controls the fuel injection ignition according to the generated engine enabling instruction, and at the moment, the engine is successfully started. Exemplarily, referring to fig. 8, fig. 8 is a timing chart of a motor direct start engine according to a third embodiment of the present invention. As shown in fig. 8, after the starting mode is determined, the HCU sends a starting command to the motor and the clutch, controls the motor and the clutch to start, and drags the engine to increase the rotation speed of the engine, when the rotation speed of the engine reaches a second rotation speed threshold value, the HCU controls the motor to stop working, and simultaneously sends engine enabling information to the ECU, the ECU generates an engine enabling command according to the received engine enabling information, controls oil injection and ignition, and the oil injection and ignition engine can be successfully started due to the fact that the rotation speed of the engine is higher at the moment.
On the basis of the foregoing embodiment, referring to fig. 9, fig. 9 is a flowchart of an engine start control method in which the starting manner is that of starting the engine auxiliary motor according to a third embodiment of the present invention, and S61 and S62 remain unchanged, where "the vehicle control unit sends start information corresponding to the starting manner to the engine controller" and "the engine controller controls the engine to start according to the received start information" may be further embodied:
s63, when the vehicle control unit determines that the starting mode corresponding to the engine is that the engine assists the motor to start the engine, the vehicle control unit sends a motor starting instruction to the motor to control the motor to start and control the motor to drag the engine.
Specifically, when the HCU determines that the starting mode of the engine is that the engine assists the motor to start the engine, a motor starting command is sent to the motor to control the motor to start and drag the engine.
S64, the vehicle control unit synchronously sends engine enabling information to the engine controller, so that the engine controller synchronously enables and controls oil injection and ignition according to the engine enabling information.
The HCU sends a motor starting instruction to the motor and synchronously sends engine enabling information to the ECU, so that the ECU synchronously controls oil injection and ignition.
And S65, generating an engine enabling instruction by the engine controller according to the received engine enabling information.
And S66, enabling the engine controller to control the fuel injection ignition according to the engine enabling instruction.
During the dragging of the motor, the oil injection and ignition are simultaneously enabled, so that the engine does work in advance, the starting is assisted, the consumption of the electric quantity of the high-voltage battery can be reduced, and the quick starting of the engine can be ensured.
S67, when the rotation speed of the engine is larger than or equal to a second rotation speed threshold value, the engine is started successfully.
Exemplarily, referring to fig. 10, fig. 10 is a timing chart of starting an engine by an engine auxiliary motor according to a third embodiment of the present invention. As shown in fig. 10, after the starting mode is determined, the HCU sends a motor starting command to the motor to control the motor to start, and at the same time, sends engine enabling information to the ECU, and after the ECU generates the engine enabling command according to the engine enabling information, the ECU controls fuel injection and ignition according to the engine enabling command to enable the engine to work in advance, and when the rotating speed of the engine reaches a second rotating speed threshold value, the HCU controls the motor to stop working, and the engine starts successfully.
On the basis of the foregoing embodiment, referring to fig. 11, fig. 11 is a flowchart of an engine start control method in which a starting manner is a motor-simulated starter start according to a third embodiment of the present invention, and S71 and S72 remain unchanged, where "the vehicle control unit sends start information corresponding to the starting manner to an engine controller" and "the engine controller controls the engine to start according to the received start information" may be further embodied:
s73, when the vehicle control unit determines that the starting mode corresponding to the engine is that a motor simulates a starter to start the engine, the vehicle control unit determines the target rotating speed of the engine according to the starting mode.
And S74, the vehicle control unit controls the motor to start and controls the motor to drive the engine.
And S75, the vehicle control unit sends engine enabling information, a target rotating speed and rotating speed control information to the engine controller.
And S76, when the rotating speed of the engine is greater than or equal to a first rotating speed threshold value, the vehicle control unit controls the motor to quit dragging the engine.
And S77, the engine controller generates corresponding engine enabling instructions and corresponding rotating speed control instructions according to the received engine enabling information and rotating speed control information.
And S78, controlling the rotation speed of the engine by the engine controller according to the rotation speed control command.
And S79, enabling the engine controller to control the injection ignition according to the engine enabling instruction when the rotating speed of the engine is larger than or equal to a first rotating speed threshold value.
S80, when the rotating speed of the engine is larger than or equal to the target rotating speed, the engine is started successfully.
The process is similar to the process of engine starting by the speed controller, and specific reference may be made to the description of engine starting by the speed controller, which is not described herein again. Exemplarily, referring to fig. 12, fig. 12 is a timing chart of starting an engine by using a motor simulation starter according to a third embodiment of the present invention. As shown in fig. 12, after the starting mode is determined, the HCU controls the motor to start and drag the engine to increase the rotation speed of the engine, when the rotation speed of the engine reaches a first rotation speed threshold value, i.e., point C in fig. 12, the motor stops working, the ECU controls the fuel injection ignition according to the engine enabling instruction to make the engine work by the fuel injection ignition of the ECU, and at this time, the engine is started, and when the rotation speed of the engine reaches a target rotation speed, the starting is successful.
On the basis of the third embodiment of the invention, the engine is controlled to be successfully started under different working conditions according to different starting modes and the combined action of the HCU and the ECU, so that the probability of starting failure is reduced.
Example four
Fig. 13 is a structural diagram of an engine start control system according to a fourth embodiment of the present invention, where the system may execute the engine start control method according to the foregoing embodiment, specifically, the system includes:
the vehicle control unit 410 is used for acquiring the current working condition of the target vehicle, determining a starting mode corresponding to the engine according to the current working condition, and sending starting information corresponding to the starting mode to the engine controller;
an engine controller 420 for controlling the engine to start based on the received start information.
The embodiment of the invention provides an engine starting control system, which is characterized in that the current working condition of a target vehicle is obtained through a vehicle control unit, the vehicle control unit determines a starting mode corresponding to an engine according to the current working condition and sends starting information corresponding to the starting mode to an engine controller, and the engine controller controls the engine to start according to the received starting information. Compared with the prior art, the embodiment of the invention can select a proper engine starting mode according to the working condition corresponding to the target vehicle, and solves the problem that the normal starting of the engine cannot be ensured when the vehicle is in an extreme working condition or some systems have faults due to a single starting mode in the prior art.
For the control process of engine starting, reference may be made to the above embodiments, and details are not repeated in this embodiment.
EXAMPLE five
Fig. 14 is a structural diagram of a vehicle according to a fifth embodiment of the present invention, and specifically, referring to fig. 14, the vehicle includes: the engine 510, the motor 520, the starter 530, the high-voltage battery 540, the low-voltage battery 550, the vehicle controller 560, the engine controller 570, and the memory 580 may be connected by a bus or in another manner, and the engine 510, the motor 520, the starter 530, the high-voltage battery 540, the low-voltage battery 550, the vehicle controller 560, the engine controller 570, and the memory 580 may be connected by a bus in fig. 14, for example. The present embodiment collectively refers to the vehicle controller 560 and the engine controller 570 as the controller 590.
The engine 510 is used for providing power for the running of the vehicle, the motor 520 is used for assisting in starting the engine 510, the starter 530 is used for assisting in starting the engine 510, the high-voltage battery 540 is used for supplying power to the devices such as the motor 510, and the low-voltage battery 550 is used for supplying power to the devices such as the starter 530.
The memory 580 is provided as a computer-readable storage medium that can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the engine start control method in the embodiment of the present invention. The controller 590 executes various functional applications and data processing of the vehicle, that is, implements the engine start control method of the above-described embodiment, by running software programs, instructions, and modules stored in the memory 580.
The memory 580 mainly includes a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 580 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 580 may further include memory located remotely from the controller 590, which may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The vehicle according to the fifth embodiment of the present invention is the same as the engine start control method according to the first embodiment of the present invention, and the technical details that are not described in detail in the present embodiment can be referred to the first embodiment of the present invention.
EXAMPLE six
A sixth embodiment of the present invention further provides a storage medium having stored thereon a computer program that, when executed by a controller, implements an engine start control method according to the above-described embodiment of the present invention.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the operations in the engine start control method described above, and may also perform the relevant operations in the engine start control method provided by the embodiments of the present invention, and has corresponding functions and advantages.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a robot, a personal computer, a server, or a network device) to execute the engine starting control method according to the embodiments of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. An engine start control method characterized by comprising:
the vehicle control unit acquires the current working condition of a target vehicle;
the vehicle control unit determines a starting mode corresponding to the engine according to the current working condition, and sends starting information corresponding to the starting mode to the engine controller;
the engine controller controls the engine to start according to the received starting information;
the current operating conditions include: at least one of the electric quantity of a high-voltage battery on the target vehicle is smaller than a first preset value, the electric quantity of a motor or the high-voltage battery is in fault, the electric quantity of a low-voltage battery is smaller than a second preset value, the starter is in fault, the environmental temperature is smaller than a preset threshold value and the rotating speed is synchronous;
the starting mode comprises the following steps: at least one of a torque control starter starting engine, a rotating speed control starter starting engine, a motor direct starting engine, an engine auxiliary motor starting engine and a motor simulation starter starting engine;
the vehicle control unit determines a starting mode corresponding to the engine according to the current working condition, and the method comprises the following steps:
if the vehicle control unit detects that the electric quantity of a high-voltage battery on the target vehicle is smaller than a first preset value or has an acceleration requirement, and the electric quantity of a low-voltage battery is smaller than a second preset value or the starter fails, determining that the starting mode of the engine is that a motor simulates a starter to start the engine;
if the vehicle control unit detects that the electric quantity of a high-voltage battery on the target vehicle is smaller than a first preset value or has an acceleration requirement, the electric quantity of a low-voltage battery is larger than or equal to a second preset value, the starter is normal, and has a rotating speed synchronization requirement or the environmental temperature is smaller than a preset threshold value, determining that the starting mode of the engine is that the rotating speed is controlled by the starter to start the engine;
if the vehicle control unit detects that the electric quantity of a high-voltage battery on the target vehicle is smaller than a first preset value or has an acceleration requirement, the electric quantity of a low-voltage battery is larger than or equal to a second preset value, the starter is normal and has no rotating speed synchronization requirement or the environmental temperature is larger than or equal to a preset threshold value, determining that the starting mode of the engine is that the torque control starter starts the engine;
if the vehicle control unit detects that the motor is normal and the electric quantity of a high-voltage battery on the target vehicle is larger than a first preset value and smaller than a third preset value, determining that the starting mode of the engine is that the engine auxiliary motor starts the engine;
and if the vehicle control unit detects that the motor is normal and the electric quantity of a high-voltage battery on the target vehicle is greater than or equal to a third threshold value, determining that the starting mode of the engine is that the motor directly starts the engine.
2. The method according to claim 1, wherein the vehicle control unit sends starting information corresponding to the starting mode to an engine controller, and the method comprises the following steps:
when the vehicle control unit determines that the starting mode corresponding to the engine is a torque control starter to start the engine, the vehicle control unit determines the target torque of the engine according to the starting mode;
the vehicle control unit sends starter starting request information, target torque, engine enabling information and torque control information to the engine controller;
correspondingly, the engine controller controls the engine to start according to the received starting information, and comprises the following steps:
the engine controller respectively generates a corresponding starter starting instruction, an engine enabling instruction and a torque control instruction according to the received starter starting request, the received engine enabling information and the received torque control information;
the engine controller controls the starter to start and drag the engine according to the starter starting command, the engine enabling command and the torque control command so as to increase the rotating speed of the engine;
when the rotating speed of the engine is greater than or equal to a first rotating speed threshold value, enabling the engine controller to control fuel injection ignition so that the engine responds to the target torque demand;
the engine start is successful when the torque of the engine is greater than or equal to the target torque.
3. The method according to claim 1, wherein the vehicle control unit sends starting information corresponding to the starting mode to an engine controller, and the method comprises the following steps:
when the vehicle control unit determines that the starting mode corresponding to the engine is a rotating speed control starter to start the engine, the vehicle control unit determines the target rotating speed of the engine according to the starting mode;
the vehicle control unit sends a starter starting request, a target rotating speed, engine enabling information and rotating speed control information to the engine controller;
correspondingly, the engine controller controls the engine to start according to the received starting information, and comprises the following steps:
the engine controller respectively generates a corresponding starter starting instruction, an engine enabling instruction and a corresponding rotating speed control instruction according to the received starter starting request, the target rotating speed, the engine enabling information and the rotating speed control information;
the engine controller controls the starter to start and drag the engine according to the starter starting instruction, the engine enabling instruction and the rotating speed control instruction so as to increase the rotating speed of the engine;
when the rotating speed of the engine is greater than or equal to a first rotating speed threshold value, enabling the engine controller to control fuel injection ignition so that the engine responds to the requirement of the target rotating speed;
when the rotation speed of the engine is greater than or equal to the target rotation speed, the engine is started successfully.
4. The method according to claim 1, wherein the vehicle control unit sends starting information corresponding to the starting mode to an engine controller, and the method comprises the following steps:
when the vehicle control unit determines that the starting mode corresponding to the engine is that the motor directly starts the engine, the vehicle control unit controls the motor and the clutch to work and controls the motor to drag the engine so as to increase the rotating speed of the engine;
when the rotating speed of the engine is greater than or equal to a second rotating speed threshold value, the vehicle control unit sends engine enabling information to the engine controller;
correspondingly, the engine controller controls the engine to start according to the received starting information, and comprises the following steps:
the engine controller generates an engine enabling instruction according to the received engine enabling information;
and enabling the engine controller to control oil injection ignition according to the engine enabling instruction, wherein the engine is successfully started.
5. The method according to claim 1, wherein the vehicle control unit sends starting information corresponding to the starting mode to an engine controller, and the method comprises the following steps:
when the vehicle control unit determines that the starting mode corresponding to the engine is that the engine assists the motor to start the engine, the vehicle control unit sends a motor starting instruction to the motor to control the motor to start and control the motor to drag the engine;
the vehicle control unit synchronously sends engine enabling information to the engine controller so that the engine controller synchronously enables and controls oil injection and ignition according to the engine enabling information;
correspondingly, the engine controller controls the engine to start according to the received starting information, and comprises the following steps:
the engine controller generates an engine enabling instruction according to the received engine enabling information;
enabling the engine controller to control oil injection and ignition according to the engine enabling instruction;
when the rotation speed of the engine is greater than or equal to a second rotation speed threshold value, the engine is started successfully.
6. The method according to claim 1, wherein the vehicle control unit sends starting information corresponding to the starting mode to an engine controller, and the method comprises the following steps:
when the vehicle control unit determines that the starting mode corresponding to the engine is that a motor simulates a starter to start the engine, the vehicle control unit determines the target rotating speed of the engine according to the starting mode;
the vehicle control unit controls a motor to start and controls the motor to drag the engine;
the vehicle control unit sends engine enabling information, a target rotating speed and rotating speed control information to the engine controller;
when the rotating speed of the engine is greater than or equal to a first rotating speed threshold value, the vehicle control unit controls the motor to quit dragging the engine;
correspondingly, the engine controller controls the engine to start according to the received starting information, and comprises the following steps:
the engine controller respectively generates corresponding engine enabling instructions and corresponding rotating speed control instructions according to the received engine enabling information and rotating speed control information;
the engine controller controls the rotating speed of the engine according to the rotating speed control instruction;
when the rotating speed of the engine is greater than or equal to a first rotating speed threshold value, enabling the engine controller to control oil injection ignition according to the engine enabling instruction;
when the rotation speed of the engine is greater than or equal to a target rotation speed, the engine is successfully started.
7. An engine start control system characterized by comprising:
the vehicle control unit is used for acquiring the current working condition of a target vehicle, determining a starting mode corresponding to the engine according to the current working condition and sending starting information corresponding to the starting mode to the engine controller;
an engine controller for controlling the engine to start according to the received start information;
the current operating conditions include: at least one of the electric quantity of a high-voltage battery on the target vehicle is smaller than a first preset value, the electric quantity of a motor or the high-voltage battery is in fault, the electric quantity of a low-voltage battery is smaller than a second preset value, the starter is in fault, the environmental temperature is smaller than a preset threshold value and the rotating speed is synchronous;
the starting mode comprises the following steps: at least one of a torque control starter starting engine, a rotating speed control starter starting engine, a motor direct starting engine, an engine auxiliary motor starting engine and a motor simulation starter starting engine;
the vehicle control unit determines a starting mode corresponding to the engine according to the current working condition, and the method comprises the following steps:
if the vehicle control unit detects that the electric quantity of a high-voltage battery on the target vehicle is smaller than a first preset value or has an acceleration requirement, and the electric quantity of a low-voltage battery is smaller than a second preset value or the starter fails, determining that the starting mode of the engine is that a motor simulates a starter to start the engine;
if the vehicle control unit detects that the electric quantity of a high-voltage battery on the target vehicle is smaller than a first preset value or has an acceleration requirement, the electric quantity of a low-voltage battery is larger than or equal to a second preset value, the starter is normal, and has a rotating speed synchronization requirement or the environmental temperature is smaller than a preset threshold value, determining that the starting mode of the engine is that the rotating speed is controlled by the starter to start the engine;
if the vehicle control unit detects that the electric quantity of a high-voltage battery on the target vehicle is smaller than a first preset value or has an acceleration requirement, the electric quantity of a low-voltage battery is larger than or equal to a second preset value, the starter is normal and has no rotating speed synchronization requirement or the environmental temperature is larger than or equal to a preset threshold value, determining that the starting mode of the engine is that the torque control starter starts the engine;
if the vehicle control unit detects that the motor is normal and the electric quantity of a high-voltage battery on the target vehicle is larger than a first preset value and smaller than a third preset value, determining that the starting mode of the engine is that the engine auxiliary motor starts the engine;
and if the vehicle control unit detects that the motor is normal and the electric quantity of a high-voltage battery on the target vehicle is greater than or equal to a third threshold value, determining that the starting mode of the engine is that the motor directly starts the engine.
8. A vehicle, comprising: an engine, a motor, a starter, a high voltage battery, a low voltage battery, and a memory, further comprising an engine start control system according to claim 7, the engine start control system being operable to execute the engine start control method according to any one of claims 1 to 6.
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| CN111412098A (en) * | 2020-03-16 | 2020-07-14 | 东风汽车集团有限公司 | Hybrid vehicle type engine combustion state determination system and method |
| CN111994082B (en) * | 2020-08-31 | 2022-03-01 | 潍柴动力股份有限公司 | Regeneration temperature correction method and device, controller and vehicle |
| CN114810453A (en) * | 2021-06-09 | 2022-07-29 | 长城汽车股份有限公司 | Low-temperature cold starting method and system for P2-configuration hybrid vehicle and vehicle |
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| JP3829684B2 (en) * | 2001-10-16 | 2006-10-04 | 株式会社デンソー | Engine starter |
| CA2459696A1 (en) * | 2004-03-04 | 2005-09-04 | Tm4 Inc. | System and method for starting a combustion engine of a hybrid vehicle |
| US7267090B2 (en) * | 2005-11-21 | 2007-09-11 | Gm Global Technology Operations, Inc. | Method of starting a hybrid vehicle |
| JP4064428B2 (en) * | 2006-05-24 | 2008-03-19 | 本田技研工業株式会社 | Control device for internal combustion engine |
| US8147375B2 (en) * | 2009-05-19 | 2012-04-03 | GM Global Technology Operations LLC | Method of clutch control to start an engine with a hybrid transmission |
| JP5533175B2 (en) * | 2009-05-20 | 2014-06-25 | 日産自動車株式会社 | Battery monitoring device |
| US20140046520A1 (en) * | 2012-08-09 | 2014-02-13 | GM Global Technology Operations LLC | Method and apparatus for providing hybrid functionality in a vehicle |
| US9463807B2 (en) * | 2015-01-19 | 2016-10-11 | Ford Global Technologies, Llc | Vehicle start control |
| US10597024B2 (en) * | 2016-03-10 | 2020-03-24 | Ford Global Technologies, Llc | System and method for powering start-stop and hybrid vehicle components and accessories |
| CN106246433B (en) * | 2016-08-01 | 2018-06-26 | 中国第一汽车股份有限公司 | A kind of starter control method based on double battery power supply systems |
| KR102417370B1 (en) * | 2017-12-18 | 2022-07-05 | 현대자동차 주식회사 | Apparatus and method for starting engine of mild hybrid electric vehicle |
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