CN117889025A

CN117889025A - Engine starting control method and device, electronic equipment and vehicle

Info

Publication number: CN117889025A
Application number: CN202410086107.6A
Authority: CN
Inventors: 周博
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2024-01-22
Filing date: 2024-01-22
Publication date: 2024-04-16

Abstract

The disclosure provides a start control method and device of an engine, electronic equipment and a vehicle. The method comprises the following steps: determining that the vehicle running mode is a pure electric mode, and judging and processing the starter state to obtain a starter state result; responding to the state result of the starter as an available state, adjusting the reserved torque to be zero value from a preset default value, and starting the engine by using the starter when the engine starting condition is met; the reserved torque is torque for starting an engine by the motor; and in response to the starter state result being an unavailable state, adjusting the reserved torque to a first torque value smaller than or equal to the default value, and starting the engine according to the first torque value by using the motor when an engine starting condition is met. The power performance and the drivability of the whole vehicle in the pure electric mode can be guaranteed, and the driving experience of a user in the pure electric mode is optimized.

Description

Engine starting control method and device, electronic equipment and vehicle

Technical Field

The disclosure relates to the technical field of vehicle control, and in particular relates to a starting control method and device of an engine, electronic equipment and a vehicle.

Background

With the development of hybrid vehicles, the motor needs to simultaneously consider both the whole vehicle driving and the engine starting, so that the vehicle reserves part of torque from the driving torque of the vehicle driving for starting the engine in a pure electric mode. However, the engine of the vehicle is hardly involved in the pure electric mode, and the reserved part of torque from the driving torque can cause poor dynamic property of the vehicle running in the pure electric mode, so that the driving experience of a user is affected.

In view of this, how to avoid that the reserved part of torque from the driving torque causes poor dynamic performance of the vehicle running in the pure electric mode is a technical problem to be solved.

Disclosure of Invention

In view of the above, an object of the present disclosure is to provide a method and an apparatus for controlling engine start, an electronic device and a vehicle, so as to solve the problem in the prior art that the power performance of the vehicle running in the pure electric mode is poor due to reserving part of torque from the driving torque.

Based on the above object, a first aspect of the present disclosure proposes a start control method of an engine, the method comprising:

determining that the vehicle running mode is a pure electric mode, and judging and processing the starter state to obtain a starter state result;

responding to the state result of the starter as an available state, adjusting the reserved torque to be zero value from a preset default value, and starting the engine by using the starter when the engine starting condition is met; the reserved torque is torque for starting an engine by the motor;

And in response to the starter state result being an unavailable state, adjusting the reserved torque to a first torque value smaller than or equal to the default value, and starting the engine according to the first torque value by using the motor when an engine starting condition is met.

Based on the same inventive concept, a second aspect of the present disclosure proposes a start control device of an engine, the device comprising:

the judging module is configured to determine that the vehicle running mode is a pure electric mode, and judge the state of the starter to obtain a starter state result;

a first engine start module configured to adjust a reserved torque from a preset default value to a zero value in response to the starter state result being an available state, and start the engine with the starter when an engine start condition is satisfied; the reserved torque is torque for starting an engine by the motor;

and the second engine starting module is configured to respond to the state result of the starter to be in an unavailable state, adjust the reserved torque to a first torque value smaller than or equal to the default value, and start the engine according to the first torque value by using the motor when the engine starting condition is met.

Based on the same inventive concept, a third aspect of the present disclosure proposes an electronic device comprising a memory, a processor and a computer program stored on the memory and executable by the processor, the processor implementing the method as described above when executing the computer program.

Based on the same inventive concept, a fourth aspect of the present disclosure proposes a vehicle including the start control device of the engine of the second aspect or the electronic apparatus of the third aspect or the storage medium of the fourth aspect.

From the above, it can be seen that the present disclosure provides a method and apparatus for controlling engine start, an electronic device, and a vehicle. The vehicle operating mode is determined to be the pure electric mode. When the result of the state of the starter is an available state, the reserved torque is adjusted to be zero value by a preset default value, namely, the torque is not reserved from the driving torque for driving and running of the vehicle, the driving torque can be completely used for driving and running of the vehicle, the power performance and the drivability of the whole vehicle in a pure electric mode can be ensured, the driving experience of a user in the pure electric mode is optimized, and the starter is utilized to start the engine when the starting condition of the engine is met, so that the situation that the engine cannot be started when the reserved torque is adjusted to be zero value is avoided. When the starter state result is an unavailable state, the reserved torque is adjusted to be a first torque value smaller than or equal to a default value, namely, smaller torque is reserved from the driving torque and used for starting the engine, the power performance of the whole vehicle in a pure electric mode is guaranteed to the greatest extent, the engine is started by the motor according to the first torque value when the engine starting condition is met, and the engine can be started by the motor according to the reserved first torque value under the condition that the starter is not available.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure or related art, the drawings required for the embodiments or related art description will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.

FIG. 1 is a flow chart of a method of engine start control of an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a start control device of an engine according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the disclosure.

Detailed Description

For the purposes of promoting an understanding of the principles and advantages of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same.

It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The terms "first," "second," and the like, as used in embodiments of the present disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Based on the description of the background art, there are pure electric mode and hybrid mode for current P2 architecture vehicles. When the vehicle is switched to the pure electric mode, the engine is hardly intervened, but the existence of reserved torque causes poor power performance of running in the pure electric mode, so that the power requirement of a user on the vehicle cannot be met, and the driving experience of the user is affected. Therefore, in order to solve the problem of poor power performance of the vehicle in the pure electric mode, the technical scheme of the embodiment of the application is provided.

As described above, how to avoid that the reserved part of torque from the driving torque causes poor power performance of the vehicle running in the pure electric mode becomes an important research problem.

Based on the above description, as shown in fig. 1, the method for controlling the start of the engine according to the present embodiment includes:

step 101, determining that the vehicle running mode is a pure electric mode, and judging and processing the starter state to obtain a starter state result.

In specific implementation, the plug-in hybrid electric vehicle mainly uses an engine as a main part and a motor as an auxiliary part. For a plug-in hybrid vehicle, the vehicle operating modes include: pure electric mode and hybrid mode.

And when the vehicle running mode is the pure electric mode, judging and processing the starter state to obtain a starter state result. The starter is called a motor, converts electric energy of the auxiliary battery into mechanical energy, and drives the flywheel of the engine to rotate so as to start the engine. For example, the auxiliary battery may be a 12V battery and the starter may be a 12V starter.

Specifically, the starter state result may be obtained by performing the judgment processing on the starter state in the following manner. The judging method comprises the following steps: judging whether the starter has faults or not, and obtaining a starter state result. And/or judging whether the auxiliary battery corresponding to the starter has faults or not, and obtaining a starter state result. And/or judging whether the starter fails to start in the historic power-on and power-off period to obtain a starter state result.

And determining a starter state result as an available state in response to the three conditions that the starter does not have a fault, an auxiliary battery corresponding to the starter does not have a fault, and the starter does not have a start failure in a historical power-on and power-off period being met simultaneously. And determining that the starter state result is an unavailable state in response to at least one of the three conditions including the presence of a fault in the starter, the presence of a fault in an auxiliary battery corresponding to the starter and the presence of a start failure in a historical power-on and power-off period of the starter.

Step 102, in response to the starter state result being an available state, adjusting the reserved torque from a preset default value to a zero value, and starting the engine by using the starter when an engine starting condition is met; the reserved torque is torque for starting an engine by the motor.

In particular, the reserved torque is a predetermined torque for starting the engine by the motor (e.g., a P2 motor). In the pure electric mode, partial torque (namely reserved torque) is reserved from the driving torque corresponding to the running of the vehicle for starting the engine by the motor in order to achieve the whole vehicle driving and the engine starting of the vehicle. For example, if the driving torque of the vehicle is 600n·m and the default value of the reserved torque is 100n·m, the driving torque actually available to the vehicle in the pure electric mode is 600n·m to 100n·m=500 n·m, and the reserved torque of 100n·m is used to start the engine with the electric motor when the engine needs to be started. Thus, the driving torque actually available to the vehicle is changed from 600n·m to 500n·m after the reserved torque of the reserved default value, which may reduce the power performance of the vehicle.

When the starter state results in an available state, the starter can be used to start the engine, and the motor is not required to start the engine according to the reserved torque. Therefore, when the starter state results in the available state, the reserved torque is not reserved from the driving torque of the vehicle, and the higher driving torque requirement of a user can be met, so that the power performance of the vehicle in the pure electric mode is ensured.

For example, the driving torque of the vehicle is 600n·m, the default value of the reserved torque is 100n·m, so that the driving torque actually available to the vehicle is 600n·m to 100n·m=500 n·m, and when the required torque at the time of driving by the user is 530n·m, the driving torque actually available to the vehicle cannot meet the user's requirement. When the starter state result is the available state, the reserved torque is adjusted to be zero value from a preset default value, and at the moment, the actual available driving torque of the vehicle is 600 N.m, so that the required torque of a user 530 N.m can be met.

And step 103, in response to the state result of the starter being an unavailable state, adjusting the reserved torque to be a first torque value smaller than or equal to the default value, and starting the engine according to the first torque value by using the motor when an engine starting condition is met.

In particular, when the starter state results in an unavailable state, the engine cannot be started by the starter, and the motor is required to start the engine according to the reserved torque. In order to ensure the power performance of the whole vehicle running while the motor can start the engine, the reserved torque is adjusted to be smaller than or equal to the first torque value of the default value. Thus, the first torque value is used for starting the engine by the motor when the engine needs to be started, and the power performance of the vehicle can be ensured to the greatest extent because the first torque value is smaller than or equal to the default value.

For example, when the driving torque of the vehicle is 600n·m and the default value of the reserved torque is 100n·m, the driving torque actually available to the vehicle is 600n·m to 100n·m=500 n·m, and when the required torque at the time of driving by the user is 530n·m, the driving torque actually available to the vehicle cannot satisfy the user's requirement. When the starter state result is an unavailable state, the reserved torque is adjusted to be a first torque value smaller than or equal to a default value, the first torque value is 50 N.m, and at the moment, the actual available driving torque of the vehicle is 550 N.m, so that the required torque of a user 530 N.m can be met. In this way, the dynamic performance of the vehicle can be ensured to the greatest extent.

Specifically, when a power domain control unit (Power Domain Control Unit, abbreviated as PDCU) of the vehicle recognizes that the vehicle is started in the pure electric mode and the starter is not available, the engine is started by using the motor according to the first torque value, so that the engine can be started even in the state that the starter is not available.

Through the above embodiment, the vehicle running mode is determined to be the pure electric mode. When the result of the state of the starter is an available state, the reserved torque is adjusted to be zero value by a preset default value, namely, the torque is not reserved from the driving torque for driving and running of the vehicle, the driving torque can be completely used for driving and running of the vehicle, the power performance and the drivability of the whole vehicle in a pure electric mode can be ensured, the driving experience of a user in the pure electric mode is optimized, and the starter is utilized to start the engine when the starting condition of the engine is met, so that the situation that the engine cannot be started when the reserved torque is adjusted to be zero value is avoided. When the starter state result is an unavailable state, the reserved torque is adjusted to be a first torque value smaller than or equal to a default value, namely, smaller torque is reserved from the driving torque and used for starting the engine, the power performance of the whole vehicle in a pure electric mode is guaranteed to the greatest extent, the engine is started by the motor according to the first torque value when the engine starting condition is met, and the engine can be started by the motor according to the reserved first torque value under the condition that the starter is not available.

In some embodiments, an auxiliary battery on the vehicle is connected to the starter and the functional load, respectively, and an isolation relay is provided between the auxiliary battery and the functional load;

step 102, including:

step 102A, determining that an engine starting condition is met, cutting off power supply to the functional load through the isolation relay, and controlling the starter to start the engine.

In specific implementation, the starter can convert the electric energy of the auxiliary battery into mechanical energy and drive the flywheel of the engine to rotate so as to realize the starting of the engine. The power of the auxiliary battery may also be used to power the functional load for using the functional load of the vehicle based on the power of the auxiliary battery. Wherein the functional load is a load requiring auxiliary battery powered use, the functional load comprising at least one of: lighting systems, sound systems, and auxiliary systems. Specifically, the lighting system comprises at least one of the following: front headlight, back tail lamp, turn signal lamp, brake lamp, light and panel board lamp. The sound system includes at least one of: radio, speaker and alarm. The auxiliary system comprises at least one of the following: wiper, air conditioner and heater. In addition, the function assistance further includes: control unit, sensor and airbag of the vehicle.

The isolating relay has the functions of automatically adjusting, protecting safety, converting circuit and the like for the electric equipment of the vehicle. An isolation relay is arranged between an auxiliary battery and a functional load on the vehicle, and the opening or the disconnection between the auxiliary battery and the functional load can be controlled through the isolation relay.

When the starter state result is an available state and the vehicle starts the target working condition requiring engine start in the pure electric mode, namely the vehicle needs to start the engine in the pure electric mode and the starter is available, the engine is started through the starter. Specifically, the disconnection between the auxiliary battery and the functional load is controlled by the isolating relay, and the starter is controlled to start the engine. By opening the isolating relay, the whole vehicle can start the engine by using the starter in the driving process.

Specifically, when the power domain control unit (Power Domain Control Unit, abbreviated as PDCU) of the vehicle recognizes a target condition that the vehicle is started in the pure electric mode and needs engine start, the engine is started in an active mode by selecting a conventional starting mode, that is, the engine is determined by the starter, so that the driving capability of the motor is not occupied.

The target working condition is a working condition of the vehicle requiring engine starting in a pure electric mode. The target operating condition includes at least one of: start-up conditions, idle conditions, acceleration conditions, constant speed conditions, and load conditions.

Through the scheme, when the vehicle starts under the target working condition requiring engine starting in the pure electric mode and the starter state is the available state, the starting mode is determined to be starter starting, and the driving capability of the motor can not be occupied. In addition, the starter can control the engine to start more efficiently by arranging the isolation relay, and the electric energy of the auxiliary battery is provided for the starter to the maximum extent, so that the starter can start the engine more efficiently.

In some embodiments, the method further comprises:

step 104, determining an initial reserve torque value in response to the vehicle operating mode switching from the pure mode to the other mode.

In particular, the initial reserved torque value is a current reserved torque value of a motor of the vehicle when the vehicle is switched from the pure electric mode to the other modes. For example, when the vehicle operating mode is switched from the pure mode to the other mode, the starter state results in an available state with an initial reserved torque value of zero. When the vehicle operation mode is switched from the pure mode to the other modes, the starter state results in an unavailable state, and the initial reserved torque value is a first torque value.

And step 105, adjusting the reserved torque according to the initial reserved torque value and a preset gradient torque value.

When the vehicle is switched out of the pure electric mode, the reserved torque is adjusted from the initial reserved torque value according to the preset gradient torque value until the reserved torque is adjusted to the target torque value.

For example, the target torque value is 80 N.m; the initial reserve torque value is 50 N.m, and the preset gradient torque is torque increased by 10 N.m per second. The process of restoring the target torque value is: the torque is increased by 10 N.m. per second from the initial reserve torque value of 50 N.m. until the target torque value of 80 N.m. is restored. Meanwhile, the driving torque of the vehicle is 600 N.m, and the driving torque actually available to the vehicle is reduced from 550 N.m according to the gradient torque reduced by 10 N.m per second until the driving torque actually available to the vehicle is reduced to 520 N.m.

And step 106, in response to detecting an engine starting instruction in the adjustment process, determining a second torque value of the reserved torque, determining a magnitude relation between the second torque value and a preset starting torque value, determining a target starting mode according to the magnitude relation, and starting the engine based on the target starting mode.

When the method is implemented, in the process of adjusting the reserved torque from the initial reserved torque value to the target torque value, the engine starting instruction is detected, and then a second torque value to which the reserved torque is adjusted when the engine starting instruction is received is determined. And determining a target starting mode according to the magnitude relation between the second torque value and starting torque required for starting the engine by using the motor, and starting the engine based on the target starting mode.

The second torque value is a torque value to which the reserved torque is adjusted when the engine starting instruction is received.

And step 107, determining that the reserved torque reaches a target torque value after adjustment is completed, and starting the engine according to the target torque value by using an electric motor when an engine starting command is detected.

In particular, no engine start command is detected during the adjustment of the reserved torque from the initial reserved torque value to the target torque value. After the reserved torque is adjusted from the initial reserved torque value to the target torque value, the target torque value is enough for the motor to start the engine, and the motor is utilized to start the engine according to the target torque value when the engine start command is detected.

The vehicle is in the pure mode with little engine intervention, so the reserved torque is adjusted from a preset default value to zero when the vehicle is in the pure mode and the starter is available. However, when the vehicle is switched out of the pure mode (i.e., the vehicle switches from the pure mode to the other mode), the engine intervenes, requiring the reserved target torque value in the other mode for the electric machine to start the engine.

The target torque value is the torque reserved in other modes for starting the engine by the motor. The other modes are modes of operation other than the pure electric mode among the vehicle modes of operation. The target torque value may be a default value of the reserved torque, or may be a torque value redetermined based on the default value of the reserved torque and a current state parameter of the vehicle.

By the scheme, after the vehicle is switched out of the pure electric mode, the process of recovering the target torque value is to adjust the initial reserved torque value to the target torque value according to the preset gradient torque value. Therefore, the actual available driving torque of the vehicle is gradually reduced according to the gradient torque in the driving and running process of the vehicle, torque jump cannot occur, the influence of the actual available driving torque jump of the vehicle on the running of the vehicle is avoided, and good driving experience of a user can be ensured.

In some embodiments, at step 105, comprising:

and step 1051, in response to the initial reserved torque value being zero, increasing the initial reserved torque value from zero according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment.

When the starter state result is the available state in the pure electric mode, the reserved torque is zero. When switching from the pure mode to the other mode, the initial reserve torque value is zero. The process of adjusting the initial reserve torque value to the target torque value is: and increasing the initial reserved torque value from the zero value according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment.

In response to the initial reserve torque value being the first torque value, the first torque value and the target torque value are compared 1052.

And 1053, in response to the first torque value being greater than or equal to the target torque value, reducing the initial reserved torque value from the first torque value according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment.

And step 1054, in response to the first torque value being smaller than the target torque value, increasing the initial reserved torque value from the first torque value according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment.

When the starter is in the idle state, the reserved torque is a first torque value. When switching from the pure mode to the other mode, the initial reserve torque value is the first torque value. The process of adjusting the initial reserve torque value to the target torque value is: the first torque value and the target torque value are compared to determine whether to make an increase adjustment or a decrease adjustment to the initial reserve torque value.

And when the first torque value is larger than or equal to the target torque value, reducing the initial reserved torque value from the first torque value according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment. And when the first torque value is smaller than the target torque value, increasing the initial reserved torque value from the first torque value according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment.

According to the scheme, when the initial reserved torque value is zero or the first torque value, whether the initial reserved torque value is zero or the first torque value is determined, so that the initial reserved torque value is adjusted from the zero value to the target torque value or from the first torque value to the target torque value is determined, and the initial reserved torque value is adjusted more accurately.

In some embodiments, step 106 comprises:

in step 1061, in response to the magnitude relation being that the second torque value is greater than or equal to the starting torque value, the target starting mode is determined to be motor starting, and the motor is utilized to start the engine according to the second torque value.

In particular, the starting torque is the torque required to start the engine with the electric machine. When the second torque value is greater than or equal to the starting torque, the motor can start the engine by using the second torque value, the target starting mode is determined to be motor starting, and the motor is used for starting the engine according to the second torque value.

Step 1062, in response to the magnitude relation being that the second torque value is smaller than the starting torque value, determining that the target starting mode is starter starting, and cutting off power supply to the functional load through the isolation relay, and starting the engine by using the starter.

In particular, the starting torque is the torque required to start the engine with the electric machine. When the second torque value is smaller than the starting torque, the second torque value can not start the engine by the motor, the target starting mode is determined to be the starting mode of the starter, the power supply of the functional load is cut off through the isolating relay, and the engine is started by the starter.

Through the scheme, the second torque value and the starting torque required by starting the engine are compared. The target start mode can be determined to be motor start when the engine can be started by using the second torque value, and starter start when the engine cannot be started by using the second torque value. Thus, the target starting mode can be determined more accurately, and the engine can be ensured to be started normally.

In some embodiments, determining the target torque value further comprises:

step 10A, acquiring a current state parameter of the vehicle, and determining a corresponding target weight coefficient in the other modes based on the current state parameter.

And step 10B, performing product processing on the target weight coefficient and the default value to obtain the target torque value in the other modes.

In particular, the target torque values required by the motor to start the engine are different in different states of the vehicle. In order to make the determined target torque value more accurate, the target torque value is determined based on the current state of the vehicle.

Firstly, current state parameters of a vehicle are obtained, and corresponding target weight coefficients in other modes are determined based on the current state parameters. And then, multiplying the target weight coefficient by a default value of the reserved torque to obtain target torque values in other modes.

The current state parameter is a parameter related to the current state of the vehicle. The current state parameters include at least one of: the accelerator pedal opening of the vehicle, the current speed of the vehicle, and the ambient temperature of the vehicle.

For example, if the target weight coefficient corresponding to the other mode determined based on the current state parameter is 0.8 and the default value of the reserved torque is 100n·m, the target torque value in the other mode is 80n·m.

Through the scheme, the corresponding target weight coefficient in other modes is determined based on the current state parameter, and the target torque value in other modes is obtained by multiplying the target weight coefficient and the default value of the reserved torque. In this way, the influence of the current state of the vehicle on the target torque value required by the motor to start the engine is considered in the determined target torque value, so that the determined target torque value is more accurate.

In some embodiments, step 10A comprises:

step 10Aa, acquiring an accelerator pedal opening of a vehicle, and determining a first weight coefficient based on the accelerator pedal opening.

In specific implementation, when a driver presses an accelerator pedal, a vehicle computer controls the accelerator opening of the engine according to the position of the accelerator pedal and the pressing depth of the pedal, so that the torque output by the engine is controlled. The greater the depth of depression of the accelerator pedal, the greater the torque output from the engine and the greater the acceleration performance of the vehicle. The larger the accelerator pedal opening of the vehicle, the larger the target torque value required for engine start. Therefore, the target torque value required for starting the engine by the motor of the vehicle gradually increases as the accelerator pedal opening of the vehicle increases.

And acquiring the opening degree of an accelerator pedal of the vehicle, and determining a first weight coefficient based on the opening degree of the accelerator pedal. Specifically, the first weight coefficient corresponding to the accelerator pedal opening of the current vehicle may be determined through a pre-stored relationship between the accelerator pedal opening and the first weight coefficient.

For example, the first weight coefficient is 1 when the accelerator pedal opening is 50%; the first weight coefficient is 1.2 when the opening of the accelerator pedal is 60%; the first weight coefficient is 1.4 when the accelerator pedal opening is 70%.

And/or, in step 10Ab, acquiring the current speed of the vehicle, and determining a second weight coefficient based on the current speed.

In specific implementation, the greater the current speed of the vehicle, the easier the engine is to start under the drive of wheels, and the smaller the target torque value required by the engine start. Therefore, the target torque value required for starting the engine by the motor of the vehicle is gradually reduced as the current speed of the vehicle increases.

The current speed of the vehicle is obtained, and a second weight coefficient is determined based on the current speed. Specifically, the second weight coefficient corresponding to the current vehicle speed of the vehicle may be determined through a pre-stored relationship between the current vehicle speed and the second weight coefficient.

For example, the second weight coefficient is 1 when the current vehicle speed is 80 km/h; the second weight coefficient is 0.8 when the current vehicle speed is 100 m/h; the second weight coefficient is 0.6 when the current vehicle speed is 120 m/h.

And/or, step 10Ac, obtaining the ambient temperature of the vehicle, and determining a third weight coefficient based on the ambient temperature.

In practice, in general, in a low temperature environment, a greater torque is required to normally operate when the vehicle engine is started. The lower the ambient temperature of the vehicle, the greater the engine load and the greater the target torque value required for engine start. Therefore, the target torque value required for starting the engine by the motor of the vehicle may gradually increase as the ambient temperature of the vehicle decreases.

The ambient temperature of the vehicle is obtained and a third weight coefficient is determined based on the ambient temperature. Specifically, the third weight coefficient corresponding to the current environmental temperature of the vehicle may be determined through a pre-stored relationship between the environmental temperature and the third weight coefficient.

For example, the third weight coefficient is 1 when the ambient temperature is 25 ℃; the third weight coefficient is 1.2 when the ambient temperature is 20 ℃; the third weight coefficient is 1.4 when the ambient temperature is 15 ℃.

And step 10Ad, taking at least one of the first weight coefficient, the second weight coefficient and the third weight coefficient as a target weight coefficient in the other modes.

In specific implementation, at least one of the first weight coefficient, the second weight coefficient and the third weight coefficient is used as a target weight coefficient in other modes. And multiplying the target weight coefficient by a default value of the reserved torque to obtain target torque values in other modes.

For example, when the target torque value is affected only by the current speed of the vehicle, the second weight coefficient is taken as the target weight coefficient in the other modes. For example, if the current vehicle speed is 100m/h, the second weight coefficient is 0.8, i.e. the target weight coefficient is 0.8. The default value of the reserved torque is 100n·m, and at this time, the target torque value in the other mode is 100n·m×0.8=80 n·m.

When the target torque value is simultaneously affected by the accelerator pedal opening of the vehicle, the current vehicle speed and the ambient temperature, the first weight coefficient, the second weight coefficient and the third weight coefficient are taken as target weight coefficients. For example, the first weight coefficient is 1.2 when the opening degree of the accelerator pedal is 60%, the second weight coefficient is 0.8 when the current vehicle speed is 100m/h, and the third weight coefficient is 1.2 when the ambient temperature is 20 ℃. The default value of the reserved torque is 100n·m, and at this time, the target torque value in the other mode is 100n·m×1.2×0.8×1.2=115.2 n·m.

According to the scheme, as the target torque value required by the motor for starting the engine can be influenced by the current state parameters such as the opening degree of the accelerator pedal of the vehicle, the current speed, the ambient temperature and the like, the corresponding weight coefficients are respectively determined based on the current state parameters, so that the target weight coefficient is determined, and the target torque value determined based on the target weight coefficient is more accurate.

It should be noted that the method of the embodiments of the present disclosure may be performed by a single device, such as a computer or a server. The method of the embodiment can also be applied to a distributed scene, and is completed by mutually matching a plurality of devices. In the case of such a distributed scenario, one of the devices may perform only one or more steps of the methods of embodiments of the present disclosure, the devices interacting with each other to accomplish the methods.

It should be noted that the foregoing describes some embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Based on the same inventive concept, the present disclosure also provides a start control device of an engine, corresponding to the method of any embodiment described above.

Referring to fig. 2, the engine start control device includes:

the judging module 201 is configured to determine that the vehicle running mode is a pure electric mode, and judge the starter state to obtain a starter state result;

a first motor start module 202 configured to adjust a reserved torque from a preset default value to a zero value in response to the starter state result being an available state, and start the engine with the starter when an engine start condition is satisfied; the reserved torque is torque for starting an engine by the motor;

the second motor start module 203 is configured to adjust the reserved torque to a first torque value smaller than or equal to the default value in response to the starter state result being an unavailable state, and start the engine according to the first torque value by using the motor when an engine start condition is satisfied.

the first motor start module 202 includes:

and a first engine starting unit configured to determine that an engine starting condition is satisfied, cut off power supply to the functional load through the isolation relay, and control the starter to start the engine.

In some embodiments, the apparatus further comprises:

an initial reserve torque value determination module configured to determine an initial reserve torque value in response to the vehicle operating mode switching from the pure mode to another mode;

the reserved torque adjusting module is configured to adjust the reserved torque according to the initial reserved torque value and a preset gradient torque value;

the third engine starting module is configured to respond to the detection of an engine starting instruction in the adjustment process, determine a second torque value of the reserved torque, determine a magnitude relation between the second torque value and a preset starting torque value, determine a target starting mode according to the magnitude relation, and start the engine based on the target starting mode;

and a fourth engine starting module configured to determine that the reserved torque reaches a target torque value in response to completion of the adjustment, and start the engine according to the target torque value using the motor when an engine start command is detected.

In some embodiments, the reserve torque adjustment module includes:

the first adjusting unit is configured to respond to the initial reserved torque value as a zero value, increase the initial reserved torque value from the zero value according to the gradient torque value until the reserved torque value is the target torque value, and stop adjusting;

A comparison unit configured to compare the first torque value and the target torque value in response to the initial reserve torque value being the first torque value;

a second adjustment unit configured to reduce the initial reserve torque value from the first torque value according to the gradient torque value in response to the first torque value being greater than or equal to the target torque value until the value of the reserve torque is the target torque value, and stop adjustment;

and the third adjusting unit is configured to respond to the fact that the first torque value is smaller than the target torque value, increase the initial reserved torque value from the first torque value according to the gradient torque value until the reserved torque value is the target torque value, and stop adjusting.

In some embodiments, the third engine starting module includes:

a motor start unit configured to determine that the target start mode is motor start in response to the magnitude relation being that the second torque value is greater than or equal to the start torque value, and start the engine according to the second torque value using the motor;

and the starter starting unit is configured to determine that the target starting mode is starter starting in response to the magnitude relation that the second torque value is smaller than the starting torque value, and cut off power supply of a functional load through an isolation relay so as to start the engine by using the starter.

In some embodiments, the apparatus further comprises:

the target weight coefficient determining module is configured to acquire current state parameters of the vehicle and determine corresponding target weight coefficients in the other modes based on the current state parameters;

and the target torque value determining module is configured to perform product processing on the target weight coefficient and the default value to obtain target torque values in the other modes.

In some embodiments, the target weight coefficient determination module includes:

a first weight coefficient determination unit configured to acquire an accelerator pedal opening of a vehicle, and determine a first weight coefficient based on the accelerator pedal opening; and/or the number of the groups of groups,

a second weight coefficient determination unit configured to acquire a current vehicle speed of a vehicle and determine a second weight coefficient based on the current vehicle speed; and/or the number of the groups of groups,

a third weight coefficient determination unit configured to acquire an ambient temperature of the vehicle and determine a third weight coefficient based on the ambient temperature;

and a target weight coefficient determination unit configured to take at least one of the first weight coefficient, the second weight coefficient, and the third weight coefficient as a target weight coefficient in the other mode.

For convenience of description, the above devices are described as being functionally divided into various modules, respectively. Of course, the functions of the various modules may be implemented in the same one or more pieces of software and/or hardware when implementing the present disclosure.

The device of the foregoing embodiment is used to implement the corresponding engine start control method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.

Based on the same inventive concept, the present disclosure also provides an electronic device corresponding to the method of any embodiment, including a memory, a processor, and a computer program stored on the memory and capable of running on the processor, where the processor implements the method of controlling engine start according to any embodiment when executing the program.

Fig. 3 shows a more specific hardware architecture of an electronic device according to this embodiment, where the device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 implement communication connections therebetween within the device via a bus 1050.

The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit ), microprocessor, application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, etc. for executing relevant programs to implement the technical solutions provided in the embodiments of the present disclosure.

The Memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory ), static storage device, dynamic storage device, or the like. Memory 1020 may store an operating system and other application programs, and when the embodiments of the present specification are implemented in software or firmware, the associated program code is stored in memory 1020 and executed by processor 1010.

The input/output interface 1030 is used to connect with an input/output module for inputting and outputting information. The input/output module may be configured as a component in a device (not shown) or may be external to the device to provide corresponding functionality. Wherein the input devices may include a keyboard, mouse, touch screen, microphone, various types of sensors, etc., and the output devices may include a display, speaker, vibrator, indicator lights, etc.

Communication interface 1040 is used to connect communication modules (not shown) to enable communication interactions of the present device with other devices. The communication module may implement communication through wired mode (such as USB (Universal Serial Bus, universal serial bus), network cable, etc.), or may implement communication through wireless mode (such as mobile network, WIFI (Wireless Fidelity, wireless network communication technology), bluetooth, etc.).

Bus 1050 includes a path for transferring information between components of the device (e.g., processor 1010, memory 1020, input/output interface 1030, and communication interface 1040).

It should be noted that although the above-described device only shows processor 1010, memory 1020, input/output interface 1030, communication interface 1040, and bus 1050, in an implementation, the device may include other components necessary to achieve proper operation. Furthermore, it will be understood by those skilled in the art that the above-described apparatus may include only the components necessary to implement the embodiments of the present description, and not all the components shown in the drawings.

The electronic device of the foregoing embodiment is configured to implement the corresponding engine start control method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.

Based on the same inventive concept, the present disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the engine start control method according to any of the above embodiments, corresponding to any of the above embodiments.

The computer readable media of the present embodiments, including both permanent and non-permanent, removable and non-removable media, may be used to implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device.

The storage medium of the above embodiment stores computer instructions for causing the computer to execute the engine start control method according to any one of the above embodiments, and has the advantages of the corresponding method embodiments, which are not described herein.

Based on the same inventive concept, the application also provides a vehicle, which comprises the engine start control device, the electronic device or the storage medium in the embodiment, and the vehicle device realizes the engine start control method in any embodiment.

The vehicle of the foregoing embodiments is used to implement the engine start control method of any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which are not described herein.

Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined under the idea of the present disclosure, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in details for the sake of brevity.

Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the embodiments of the present disclosure. Furthermore, the devices may be shown in block diagram form in order to avoid obscuring the embodiments of the present disclosure, and this also accounts for the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform on which the embodiments of the present disclosure are to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that embodiments of the disclosure can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.

While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

The disclosed embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Accordingly, any omissions, modifications, equivalents, improvements, and the like, which are within the spirit and principles of the embodiments of the disclosure, are intended to be included within the scope of the disclosure.

Claims

1. A start control method of an engine, characterized by comprising:

2. The method of claim 1, wherein an auxiliary battery on the vehicle is connected to the starter and the functional load, respectively, and an isolation relay is provided between the auxiliary battery and the functional load;

The starting the engine with the starter when an engine starting condition is satisfied includes:

and determining that the engine starting condition is met, cutting off the power supply of the functional load through the isolating relay, and controlling the starter to start the engine.

3. The method as recited in claim 1, further comprising:

determining an initial reserve torque value in response to the vehicle operating mode switching from the pure mode to another mode;

adjusting the reserved torque according to the initial reserved torque value and a preset gradient torque value;

in response to detecting an engine starting instruction in the adjustment process, determining a second torque value of the reserved torque, determining a magnitude relation between the second torque value and a preset starting torque value, determining a target starting mode according to the magnitude relation, and starting the engine based on the target starting mode;

and in response to determining that the reserved torque reaches a target torque value after adjustment is completed, and starting the engine according to the target torque value by using an electric motor when an engine starting command is detected.

4. A method according to claim 3, wherein said adjusting said reserve torque according to said initial reserve torque value and a preset gradient torque value comprises:

Responding to the initial reserved torque value as a zero value, increasing the initial reserved torque value from the zero value according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment;

in response to the initial reserve torque value being the first torque value, comparing the first torque value to the target torque value;

responding to the first torque value being greater than or equal to the target torque value, reducing the initial reserved torque value from the first torque value according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment;

and in response to the first torque value being smaller than the target torque value, increasing the initial reserved torque value from the first torque value according to the gradient torque value until the reserved torque value is the target torque value, and stopping adjustment.

5. A method according to claim 3, wherein said determining a target cranking mode according to said magnitude relation, starting the engine based on said target cranking mode comprises:

responding to the magnitude relation that the second torque value is larger than or equal to the starting torque value, determining that the target starting mode is motor starting, and starting an engine according to the second torque value by utilizing a motor;

And responding to the magnitude relation that the second torque value is smaller than the starting torque value, determining that the target starting mode is starter starting, cutting off power supply of a functional load through an isolation relay, and starting an engine by using the starter.

6. A method according to claim 3, further comprising determining the target torque value by:

acquiring current state parameters of a vehicle, and determining corresponding target weight coefficients in other modes based on the current state parameters;

and carrying out product processing on the target weight coefficient and the default value to obtain the target torque value under the other modes.

7. The method of claim 6, wherein the obtaining the current state parameter of the vehicle and determining the corresponding target weight coefficient in the other mode based on the current state parameter comprises:

acquiring an accelerator pedal opening of a vehicle, and determining a first weight coefficient based on the accelerator pedal opening; and/or the number of the groups of groups,

acquiring the current speed of a vehicle, and determining a second weight coefficient based on the current speed; and/or the number of the groups of groups,

acquiring the environment temperature of the vehicle, and determining a third weight coefficient based on the environment temperature;

And taking at least one of the first weight coefficient, the second weight coefficient and the third weight coefficient as a target weight coefficient in the other modes.

8. A start control device of an engine, characterized by comprising:

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any one of claims 1 to 7 when the program is executed.

10. A vehicle comprising the engine start control device according to claim 8 or the electronic apparatus according to claim 9.