CN114932907A - Vehicle starting method and device - Google Patents

Abstract

The present application relates to a vehicle starting method and device, belonging to the technical field of vehicles. The method includes: after the vehicle is started, periodically acquiring the pressure value of the brake master cylinder of the vehicle; if the pressure is detected within a first preset time period after the reset signal of the brake light switch is detected, the pressure is detected value is equal to the target pressure value, then when it is detected that the pressure value is equal to the target pressure value and the vehicle speed is zero, the engine of the vehicle is controlled to output a first driving torque, wherein the target pressure value is the pressure value corresponding to the equilibrium point determined after the engine of the vehicle is controlled to output the second driving torque when the reset signal of the brake light switch is detected. By adopting the present application, the duration of the simultaneous existence of the braking torque and the first driving torque is reduced, thereby reducing the degree and time of abnormal noise and shaking of the vehicle, thereby improving the smoothness of the vehicle to start, and improving the user experience.

Description

Vehicle starting method and device

technical field

The present application relates to the technical field of vehicles, and in particular, to a vehicle starting method and device.

Background technique

With the gradual development of vehicles towards electrification, networking, intelligence and sharing, people have higher and higher demands for comfort while driving. Among them, whether the vehicle starts smoothly or not is the user's initial impression of the vehicle. It is an important part that affects the user experience.

The current vehicle starting method is: after the vehicle starts, the user depresses the brake pedal after the D gear or R gear is engaged, the brake master cylinder starts to work, the braking system begins to output braking torque, and when the brake is depressed In the process of pedaling, the setting signal of the brake light switch, and then the user releases the brake pedal, in the process of the brake pedal returning to the initial position, the reset signal of the brake light switch, when the vehicle detects the brake light switch When the reset signal is received, the drive torque will be output. However, since the brake pedal has a certain travel to return to the initial position, when the brake light switch reset signal, the brake pedal does not return to the initial position, but there is still a part of the travel from the initial position (for example, , the total travel of the brake pedal is 60mm, and when the brake light switch is reset, there is still 10mm of travel left for the brake pedal to return to the initial position). There is still braking torque. When the driving torque gradually increases to be equal to the braking torque, the equilibrium point is reached. At this time, the vehicle speed is still zero. When the driving torque gradually increases to be greater than the braking torque, the vehicle speed starts to increase from Zero increase and the vehicle starts to drive forward or backward.

However, when the braking torque and the driving torque in the vehicle exist at the same time, it will cause the vehicle to make abnormal noises or even shake, thus bringing a poor user experience to the user.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a vehicle starting method and device, which can solve the technical problems existing in the related art. The technical solutions of the vehicle starting method and device are as follows:

On the one hand, an embodiment of the present application provides a method for starting a vehicle, the method comprising:

After the vehicle is started, periodically obtain the pressure value of the brake master cylinder of the vehicle;

If it is detected that the pressure value is equal to the target pressure value within the first preset time period after the reset signal of the brake light switch is detected, then when the detected pressure value is equal to the target pressure value and the vehicle When the vehicle speed is zero, the engine of the vehicle is controlled to output a first driving torque, wherein the target pressure value is to control the engine of the vehicle to output a second driving torque when the reset signal of the brake light switch is detected Then determine the pressure value corresponding to the equilibrium point.

In a possible implementation, the method further includes:

Multiple vehicle tests are performed on the vehicle, and pressure values corresponding to multiple balance points are determined, wherein the vehicle test includes controlling the engine of the vehicle to output a second signal when the reset signal of the brake light switch is detected. drive torque;

The target pressure value is determined based on the pressure values corresponding to the plurality of equilibrium points.

In a possible implementation manner, the determining the target pressure value based on the pressure values corresponding to the multiple equilibrium points includes:

An average value between the pressure values corresponding to the plurality of balance points is determined as the target pressure value.

In a possible implementation manner, the pressure value is acquired based on a pressure sensor installed inside the master brake cylinder.

In a possible implementation manner, the target pressure value corresponds to a balance point determined after the engine of the vehicle is controlled to output the second driving torque in a creep mode when a reset signal of the brake light switch is detected. pressure value;

The controlling the engine of the vehicle to output the first driving torque includes:

The engine of the vehicle is controlled to output a first drive torque in the creep mode.

In a possible implementation, the method further includes:

If it is detected that the pressure value is equal to the target pressure value within a second preset time period before the reset signal of the brake light switch is detected, then when the reset signal of the brake light switch is detected, and When the vehicle speed of the vehicle is zero, the engine of the vehicle is controlled to output a first driving torque.

On the other hand, an embodiment of the present application provides a vehicle starting device, and the device includes:

an acquisition module, configured to periodically acquire the pressure value of the brake master cylinder of the vehicle after the vehicle is started;

The control module is configured to, if the pressure value is detected to be equal to the target pressure value within a first preset time period after the reset signal of the brake light switch is detected, then when the detected pressure value is equal to the target pressure value , and when the speed of the vehicle is zero, the engine of the vehicle is controlled to output a first driving torque, wherein the target pressure value is to control the engine of the vehicle when the reset signal of the brake light switch is detected The pressure value corresponding to the equilibrium point determined after the second driving torque is output.

In a possible implementation manner, the device further includes a test module for:

Multiple vehicle tests are performed on the vehicle, and pressure values corresponding to multiple balance points are determined, wherein the vehicle test includes controlling the engine of the vehicle to output a second signal when the reset signal of the brake light switch is detected. drive torque;

The target pressure value is determined based on the pressure values corresponding to the plurality of equilibrium points.

In a possible implementation manner, the test module is used for:

An average value between the pressure values corresponding to the plurality of balance points is determined as the target pressure value.

In a possible implementation manner, the pressure value is acquired based on a pressure sensor installed inside the master brake cylinder.

In a possible implementation manner, the target pressure value corresponds to a balance point determined after the engine of the vehicle is controlled to output the second driving torque in a creep mode when a reset signal of the brake light switch is detected. pressure value;

The control module is used for:

The engine of the vehicle is controlled to output a first drive torque in the creep mode.

In a possible implementation manner, the control module is further configured to:

If it is detected that the pressure value is equal to the target pressure value within a second preset time period before the reset signal of the brake light switch is detected, then when the reset signal of the brake light switch is detected, and When the vehicle speed of the vehicle is zero, the engine of the vehicle is controlled to output a first driving torque.

The technical solutions provided by the embodiments of the present application include at least the following beneficial effects:

The embodiment of the present application provides a method for starting a vehicle. After the vehicle is started, the pressure value of the brake master cylinder of the vehicle is periodically obtained. When it is detected that the pressure value is equal to the target pressure value, when the detected pressure value is equal to the target pressure value and the vehicle speed is zero, the engine of the vehicle is controlled to output the first driving torque. Since the target pressure value is smaller than the pressure value of the reset signal of the brake light switch, at this time, the braking torque is already small, and the first driving torque is output when the braking torque is small, thereby reducing the abnormal noise and shaking of the vehicle In addition, since the first driving torque is output only when the braking torque is small, the braking torque will be reduced to zero quickly, therefore, the duration of the simultaneous existence of the braking torque and the first driving torque is reduced, thereby reducing the output of the vehicle. Abnormal sound and jitter time. Therefore, by using the present application, the degree and time of abnormal noise and shaking of the vehicle can be reduced, thereby improving the smoothness of the vehicle to start, thereby improving the user experience.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not limiting of the present application.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic diagram of the movement of the brake pedal after the brake pedal is stepped on according to an embodiment of the present application;

2 is a schematic diagram of the movement of the brake pedal after releasing the brake pedal according to an embodiment of the present application;

3 is a schematic diagram illustrating a vehicle starting method in the prior art;

4 is a schematic diagram of a vehicle starting method according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a vehicle starting method according to an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The usual method for the user to start the vehicle is: when the user sits in the vehicle, starts the vehicle, and then can engage in the D or R gear, and then depress the brake pedal after the gear is engaged. The cylinder starts to work, the pressure value in the brake master cylinder gradually increases, the brake system starts to output braking torque, and then the user can release the brake pedal, at this time, the pressure value in the brake master cylinder gradually decreases, and the brake The braking torque output by the brake system gradually decreases. After the brake pedal is released, the vehicle's controller will control the engine output driving torque, and the braking torque will gradually decrease. When the driving torque is equal to the braking torque, the equilibrium point is reached. When the driving torque is greater than the braking torque, the vehicle starts Driving, that is, starting to drive forward or backward, so as to complete the starting of the vehicle.

In the process of depressing the brake pedal, the setting signal of the brake light switch will be triggered, as shown in Figure 1. Figure 1 shows the movement process of the brake pedal after depressing the brake pedal, in which point A is The initial position of the brake pedal, point B is the position where the brake pedal is fully depressed, and point C is the position of the brake pedal when the set signal of the brake light switch is detected. In the process of releasing the brake pedal (that is, when the brake pedal is returning to the initial position), the reset signal of the brake light switch will be triggered, as shown in Figure 2, which shows the release of the brake pedal The movement process of the rear brake pedal, in which point A and point B have the same meanings as above, and point D is the position of the brake pedal when the reset signal of the brake light switch is detected.

In the prior art, when the controller of the vehicle detects the reset signal of the brake light switch, it controls the engine of the vehicle to output the second driving torque. However, since the brake pedal does not fully return to the initial position (as shown in Figure 2) when the reset signal of the stop light switch is received, the braking system is still outputting braking torque when the reset signal of the stop light switch is received. After the reset signal of the brake light switch, the braking torque and the driving torque exist at the same time for a long period of time, and the simultaneous existence of the braking torque and the driving torque will cause the vehicle to make abnormal noises or even shake. .

As shown in FIG. 3, FIG. 3 shows the vehicle starting method in the prior art, wherein, point E is the time point when the controller detects the reset signal of the brake light switch, point F is the braking torque and the second drive Equilibrium point when torques are equal. It can be seen from Figure 3 that when the controller detects the reset signal of the brake light switch, the engine starts to output the second driving torque, and after detecting the reset signal of the brake light switch, the braking torque begins to gradually decrease, and the second The drive torque begins to increase gradually, reaching an equilibrium point when the braking torque is equal to the second drive torque.

Below, the method for determining the target pressure value in the following step 402 will be introduced in more detail:

When the vehicle is in production, the staff can test the vehicle, that is, start the vehicle first, then switch to the D or R gear, and then depress the brake pedal. During the process of depressing the brake pedal, the vehicle's controller can The set signal of the stop light switch is detected. Then the staff can release the brake pedal. During the process of the brake pedal returning to the initial position, the controller of the vehicle can detect the reset signal of the brake light switch. The engine outputs the second drive torque.

After the engine of the vehicle starts to output the second driving torque, the braking torque and the driving torque coexist, and the braking torque is greater than the driving torque, and the brake pedal returns to the initial position from the position at the time of the reset signal of the brake light switch During the process, the pressure value in the brake master cylinder gradually decreases, and the braking torque gradually decreases, but the second driving torque gradually increases from zero. When the braking torque is equal to the driving torque, the equilibrium point is reached (ie Figure 3 At this point, the controller can obtain the pressure value of the brake master cylinder corresponding to the balance point.

The target pressure value in the embodiment of the present application corresponds to the balance point determined by using the vehicle starting method in the prior art (that is, when the reset signal of the brake light switch is detected, the engine is controlled to output the second driving torque). The pressure value of the brake master cylinder.

In a possible implementation, in order to improve the accuracy of the target pressure value, the following settings can be made:

Carry out multiple vehicle tests on the vehicle, and determine the pressure values corresponding to multiple balance points, wherein the vehicle test includes controlling the engine of the vehicle to output a second driving torque when the reset signal of the brake light switch is detected; based on multiple balance points The corresponding pressure value is used to determine the target pressure value.

The above-mentioned vehicle test is to use the vehicle starting method in the prior art to determine the corresponding pressure value of the brake master cylinder when the balance point is determined. In the implementation, in order to improve the accuracy of the target pressure value, multiple vehicle tests can be performed on the vehicle respectively, so as to determine the pressure values corresponding to multiple balance points, and then based on the pressure values corresponding to the multiple balance points, to determine the target pressure value.

In a possible implementation manner, there may also be various methods for determining the target pressure value based on the pressure values corresponding to the determined multiple equilibrium points. For example, in the embodiment of the present application, these multiple The average value between the pressure values corresponding to each balance point is determined as the target pressure value.

Alternatively, the pressure values corresponding to these multiple equilibrium points can also be screened first, for example, inaccurate results that are obviously too large or too small can be removed, and so on. Not limited. After the pressure values corresponding to the multiple balance points are screened, the average value between the pressure values corresponding to the remaining multiple balance points is calculated, and then the average value is determined as the target pressure value.

The method for determining the target pressure value based on the pressure values corresponding to the multiple equilibrium points may also be any other reasonable method, which is not limited in this embodiment of the present application.

In a possible implementation manner, in order to save costs, it is not necessary to perform vehicle tests on each driven vehicle to determine the target pressure value corresponding to each vehicle. The vehicle is tested to determine the target pressure value corresponding to this type of vehicle, that is, it can be determined as the target pressure value corresponding to each vehicle of this type.

The embodiment of the present application provides a vehicle starting method, as shown in FIG. 4 and FIG. 5 , the method includes:

401. After the vehicle is started, periodically acquire the pressure value of the master brake cylinder of the vehicle.

A pressure sensor is installed inside the master brake cylinder of the vehicle, and the pressure sensor is electrically connected to the controller of the vehicle. After the vehicle is started, the pressure sensor can periodically detect the pressure value inside the master brake cylinder of the vehicle, and use the The pressure value is sent to the controller, so the controller can periodically acquire the pressure value of the master brake cylinder of the vehicle.

In a possible implementation manner, the pressure sensor can be installed in any position that can accurately measure the pressure value inside the brake master cylinder. The inside of the hydraulic circuit communicated inside the master cylinder, etc., the application does not limit the specific installation position of the pressure sensor.

402. If the detected pressure value is equal to the target pressure value within the first preset time period after the reset signal of the brake light switch is detected, then when the detected pressure value is equal to the target pressure value and the speed of the vehicle is zero, The engine of the vehicle is controlled to output the first driving torque.

Wherein, the target pressure value is the pressure value at the equilibrium point determined after the engine of the vehicle is controlled to output the second driving torque when the reset signal of the brake light switch is detected, that is, the above-mentioned vehicle using the prior art starts The pressure value of the brake master cylinder corresponding to the balance point determined by the method is not repeated here.

In the implementation, after the user starts the vehicle, he can first shift the D gear or R gear, and then depress the brake pedal. During the process of depressing the brake pedal, the pressure value inside the brake master cylinder will gradually increase. , resulting in a gradual increase in the braking torque output by the braking system. At the same time, in the process of depressing the brake pedal, when the brake pedal moves down a certain stroke, the controller can detect the position of the brake light switch. bit signal.

After depressing the brake pedal, the user can release the brake pedal, without the external force exerted by the user on the brake pedal, the brake pedal will move up to return to the original position, and the brake pedal will return to the original position after returning to the original position. During the process, the pressure value inside the brake master cylinder will gradually decrease, resulting in a gradual decrease in the braking torque output by the brake system. After a certain travel, the controller can detect the reset signal of the brake light switch.

It can be understood that the position of the brake pedal in the entire travel when the controller detects the set signal of the brake light switch is different from the position of the brake pedal in the entire travel when the controller detects the reset signal of the brake light switch. in the same location.

Under normal circumstances, when the controller detects the reset signal of the brake light switch, the pressure value of the brake master cylinder will be greater than the target pressure value. During the process, the pressure value will gradually decrease.

When the controller detects the reset signal of the brake light switch, it can start timing. If the detected pressure value is equal to the target pressure value within the first preset time period after detecting the reset signal of the brake light switch, and the current When the vehicle speed is zero, the engine can be controlled to output the first driving torque when the detected pressure value is equal to the target pressure value. Then, the first driving torque of the vehicle gradually increases from zero, and the braking torque gradually decreases. When the torque is greater than the braking torque, the vehicle starts to travel, thereby completing the vehicle start.

As shown in FIG. 5 , FIG. 5 shows a schematic diagram of a vehicle starting method provided by an embodiment of the present application, wherein point E is the time point when the controller detects the reset signal of the brake light switch, and point F is the vehicle test for the vehicle At the time point corresponding to point F, the pressure value of the brake master cylinder is equal to the target pressure value. It can be seen from Figure 5 that when the reset signal of the brake light switch is detected, no control The engine inputs the first driving torque, but when the pressure value of the master cylinder is equal to the target pressure value, the engine is controlled to output the first driving torque, that is, the first driving torque is output at point F.

Wherein, the first preset duration may be any reasonable duration, for example, may be 0.5s, etc., and the staff may set it according to the demand for the vehicle and the performance of the vehicle itself, which is not made in this embodiment of the present application. limited.

In the above process, it is necessary to determine that the vehicle is in a stopped state when the first driving torque is output for the determination of "the vehicle speed is zero".

In the above process, since the target pressure value is smaller than the pressure value when the reset signal of the stop light switch is detected when the pressure value is reduced to be equal to the target pressure value, the braking when the pressure value is reduced to the target pressure value The torque is also smaller than the braking torque when the reset signal of the brake light switch is detected, that is, the engine is controlled to output the first driving torque when the braking torque is small, so that when the braking torque and the first driving torque exist at the same time , the degree of abnormal noise from the vehicle or the degree of vehicle shaking will be reduced. In addition, since the first driving torque is output when the braking torque is small, the braking torque will be reduced to zero quickly, and the coexistence time of the braking torque and the first driving torque will be shorter, so that the effective The degree of abnormal noise and the degree of vibration generated by the vehicle are reduced, thereby improving the smoothness of the vehicle when starting, and improving the user experience.

In a possible implementation manner, in order to improve the accuracy of the target pressure value, the output mode of the first driving torque may be the same as the output mode of the second driving torque, that is, the value of the first driving torque changes as time changes The same as the change in value of the second drive torque.

In the embodiment of the present application, the target pressure value may be the pressure value corresponding to the equilibrium point determined after the engine of the vehicle is controlled to output the second driving torque in the creep mode when the reset signal of the brake light switch is detected, that is, after the During the vehicle test, when the controller detects the reset signal of the brake light switch, the controller controls the engine to output the second driving torque in a creep mode.

When the vehicle is produced and sold to the user, when the user starts the vehicle, within the first preset time period after the controller detects the reset signal of the brake light switch, the detected pressure value is equal to the target pressure value, and the vehicle speed is zero , the engine of the vehicle is controlled to output the first driving torque in the creep mode.

In this way, both the first driving torque and the second driving torque are output in the creeping mode, and a more accurate target pressure value can be obtained for the actual driving situation of the vehicle, thereby improving the stability of the vehicle to start.

In a possible implementation manner, during the use of the vehicle, various problems may occur due to equipment failures. It will reach the reset position of the brake light switch, but it may be due to the insensitivity or sudden short circuit of the brake light switch, or due to the loss of signal during the signal transmission process, etc., when the brake pedal has reached the reset position of the brake light switch. When the controller still does not receive the reset signal of the brake light switch, when this happens, it is easy to cause interference to the starting of the vehicle. In order to solve the above problem, the vehicle starting method of the embodiment of the present application may also include the following steps: Describe the steps:

If the detected pressure value is equal to the target pressure value within the second preset time period before the reset signal of the brake light switch is detected, when the reset signal of the brake light switch is detected and the speed of the vehicle is zero, control The engine of the vehicle outputs the first drive torque.

In the implementation, if it is detected that the pressure value of the brake master cylinder is equal to the target pressure value when the reset signal of the brake light switch has not been detected, it means that the above problem may occur at this time. The preset time period, if the reset signal of the brake light switch is detected within the second preset time period after the pressure value is detected to be equal to the target pressure value, it means that the brake light switch has a short delay fault or the brake pedal A relatively minor mechanical failure has occurred. In this case, it will not have a great impact on the vehicle and the user. Therefore, the vehicle can continue to work. When the reset signal of the brake light switch is detected, and the current vehicle speed is At zero time, the engine of the vehicle is controlled to output the first driving torque when the reset signal of the brake light switch is detected. In this way, the vehicle can still start normally when a short-time minor fault occurs.

If the reset signal of the brake light switch has not been detected within the second preset time period after the detected pressure value is equal to the target pressure value, the vehicle can send an alarm signal to remind the user that some equipment or devices in the vehicle may have problems , needs inspection or repair.

The embodiment of the present application also provides a vehicle starting device, and the vehicle starting device includes:

an acquisition module, configured to periodically acquire the pressure value of the brake master cylinder of the vehicle after the vehicle is started;

The control module is configured to, if the pressure value is detected to be equal to the target pressure value within a first preset time period after the reset signal of the brake light switch is detected, then when the detected pressure value is equal to the target pressure value , and when the speed of the vehicle is zero, the engine of the vehicle is controlled to output a first driving torque, wherein the target pressure value is to control the engine of the vehicle when the reset signal of the brake light switch is detected The pressure value corresponding to the equilibrium point determined after the second driving torque is output.

In a possible implementation manner, the device further includes a test module for:

Multiple vehicle tests are performed on the vehicle, and pressure values corresponding to multiple balance points are determined, wherein the vehicle test includes controlling the engine of the vehicle to output a second signal when the reset signal of the brake light switch is detected. drive torque;

The target pressure value is determined based on the pressure values corresponding to the plurality of equilibrium points.

In a possible implementation manner, the test module is used for:

An average value between the pressure values corresponding to the plurality of balance points is determined as the target pressure value.

In a possible implementation manner, the pressure value is acquired based on a pressure sensor installed inside the master brake cylinder.

In a possible implementation manner, the target pressure value corresponds to a balance point determined after the engine of the vehicle is controlled to output the second driving torque in a creep mode when a reset signal of the brake light switch is detected. pressure value;

The control module is used for:

The engine of the vehicle is controlled to output a first drive torque in the creep mode.

In a possible implementation manner, the control module is further configured to:

If it is detected that the pressure value is equal to the target pressure value within a second preset time period before the reset signal of the brake light switch is detected, then when the reset signal of the brake light switch is detected, and When the vehicle speed of the vehicle is zero, the engine of the vehicle is controlled to output a first driving torque.

The technical solutions provided by the embodiments of the present application include at least the following beneficial effects:

The embodiment of the present application provides a method for starting a vehicle. After the vehicle is started, the pressure value of the brake master cylinder of the vehicle is periodically obtained. When it is detected that the pressure value is equal to the target pressure value, when the detected pressure value is equal to the target pressure value and the vehicle speed is zero, the engine of the vehicle is controlled to output the first driving torque. Since the target pressure value is smaller than the pressure value of the reset signal of the brake light switch, at this time, the braking torque is already small, and the first driving torque is output when the braking torque is small, thereby reducing the abnormal noise and shaking of the vehicle In addition, since the first driving torque is output only when the braking torque is small, the braking torque will be reduced to zero quickly, therefore, the duration of the simultaneous existence of the braking torque and the first driving torque is reduced, thereby reducing the output of the vehicle. Abnormal sound and jitter time. Therefore, by using the present application, the degree and time of abnormal noise and shaking of the vehicle can be reduced, thereby improving the smoothness of the vehicle to start, thereby improving the user experience.

The above descriptions are only optional embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (10)

1. A method of vehicle launch, the method comprising:

after a vehicle is started, periodically acquiring a pressure value of a brake master cylinder of the vehicle;

if the pressure value is detected to be equal to a target pressure value within a first preset time period after the reset signal of the brake lamp switch is detected, controlling an engine of the vehicle to output a first driving torque when the pressure value is detected to be equal to the target pressure value and the vehicle speed of the vehicle is zero, wherein the target pressure value is a pressure value corresponding to a balance point determined after the engine of the vehicle is controlled to output a second driving torque when the reset signal of the brake lamp switch is detected.

2. A method of vehicle launch according to claim 1 and further comprising:

performing a plurality of vehicle tests on the vehicle, and determining pressure values corresponding to a plurality of balance points, wherein the vehicle tests comprise controlling an engine of the vehicle to output a second driving torque when a reset signal of the brake light switch is detected;

and determining the target pressure value based on the pressure values corresponding to the balance points.

3. The method for vehicle launch according to claim 2, wherein said determining said target pressure value based on said pressure values corresponding to said plurality of equilibrium points comprises:

and determining the average value among the pressure values corresponding to the balance points as the target pressure value.

4. The vehicle startup method according to claim 1, characterized in that the pressure value is obtained based on a pressure sensor installed inside the master cylinder.

5. The vehicle startup method according to claim 1, characterized in that the target pressure value is a pressure value corresponding to a balance point determined after controlling an engine of the vehicle to output a second drive torque in a creep mode when a reset signal of the stop lamp switch is detected;

the controlling an engine of the vehicle to output a first drive torque includes:

controlling an engine of the vehicle to output a first drive torque in the creep mode.

6. A method of vehicle launch according to claim 1 and further comprising:

and if the pressure value is detected to be equal to the target pressure value within a second preset time before the reset signal of the brake lamp switch is detected, controlling an engine of the vehicle to output a first driving torque when the reset signal of the brake lamp switch is detected and the vehicle speed of the vehicle is zero.

7. A vehicle launch device, characterized in that it comprises:

the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for periodically acquiring the pressure value of a brake master cylinder of a vehicle after the vehicle is started;

the control module is used for controlling an engine of the vehicle to output a first driving torque when the pressure value is detected to be equal to a target pressure value and the vehicle speed of the vehicle is zero within a first preset time period after the reset signal of the brake lamp switch is detected, wherein the target pressure value is a pressure value corresponding to a balance point determined after the engine of the vehicle is controlled to output a second driving torque when the reset signal of the brake lamp switch is detected.

8. The vehicle launch apparatus as claimed in claim 7, wherein the apparatus further comprises a test module for:

performing a plurality of vehicle tests on the vehicle, and determining pressure values corresponding to a plurality of balance points, wherein the vehicle tests comprise controlling an engine of the vehicle to output a second driving torque when a reset signal of the brake light switch is detected;

and determining the target pressure value based on the pressure values corresponding to the balance points.

9. The vehicle starting device according to claim 7, wherein the target pressure value is a pressure value of an equilibrium point determined after controlling an engine of the vehicle to output a second driving torque in a creep mode when a reset signal of the stop lamp switch is detected;

the control module is configured to:

controlling an engine of the vehicle to output a first drive torque in the creep mode.

10. The vehicle launch device of claim 7, wherein said control module is further configured to:

and if the pressure value is detected to be equal to the target pressure value within a second preset time before the reset signal of the brake lamp switch is detected, controlling an engine of the vehicle to output a first driving torque when the reset signal of the brake lamp switch is detected and the vehicle speed of the vehicle is zero.

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