Vehicle control method, device, equipment and medium

Abstract

The invention provides a vehicle control method, device, equipment and medium, when a vehicle is in a braking stop working condition, the first motor torque is reduced according to the preset torque change rate to obtain the second motor torque, and the unnecessary creep torque can be inhibited by reducing the motor torque, so that motor heating is inhibited, and energy consumption is reduced; and when the second motor torque is smaller than the preset motor torque, a motor on-off circuit between the vehicle power supply module and the motor is disconnected, so that the motor enters a low-energy-consumption mode, the vehicle power supply module does not supply power to the motor any more, the motor does not consume power at the moment, and therefore energy consumption can be reduced. That is to say, by reducing the torque of the motor and disconnecting the on-off circuit of the motor, the energy consumption of the automobile is reduced and the electric quantity is saved from multiple aspects, so that the mileage of the electric automobile is increased and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the automotive field, and in particular to a vehicle control method, device, equipment and medium. Background Art

[0002] With the promotion of electric vehicles, people gradually have higher and higher requirements for the energy consumption of electric vehicles. Range anxiety has become the main bottleneck hindering the development of electric vehicles. Under this requirement, how to reduce the energy consumption of vehicles has become a widely concerned issue, such as reducing energy consumption when electric vehicles are parked. Therefore, proposing a suitable vehicle control method has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] In view of this, the purpose of this application is to provide a vehicle control method, device, equipment and medium to reduce automobile energy consumption and save electricity from multiple aspects, thereby increasing the mileage of electric vehicles and improving the user experience. The specific scheme is as follows:

[0004] In one aspect, the present application provides a vehicle control method, comprising:

[0005] When the vehicle is in a braking parking condition, the first motor torque is reduced according to a preset torque change rate to obtain a second motor torque;

[0006] When the second motor torque is less than the preset motor torque, the motor on-off circuit between the vehicle power supply module and the motor is disconnected to make the motor enter a low energy consumption mode.

[0007] Specifically, when the vehicle is in a braking parking condition, reducing the first motor torque according to a preset torque change rate to obtain the second motor torque includes:

[0008] Determining at a first moment that the vehicle is in a braking parking condition;

[0009] At a second moment, the first motor torque is reduced according to a preset torque change rate to obtain the second motor torque; the second moment is after the first moment, and the time interval between the second moment and the first moment is greater than a preset time interval.

[0010] Specifically, when the vehicle is in a braking parking condition, reducing the first motor torque according to a preset torque change rate to obtain the second motor torque includes:

[0011] Obtain vehicle speed and brake pedal opening;

[0012] When the vehicle speed is lower than a preset vehicle speed and the brake pedal opening is greater than a first pedal opening, determining that the vehicle is in a braking parking condition;

[0013] The first motor torque is reduced according to the preset torque change rate to obtain the second motor torque.

[0014] Specifically, when the vehicle is in a braking parking condition, reducing the first motor torque according to a preset torque change rate to obtain the second motor torque includes:

[0015] When the automatic parking function is in the on state, upon receiving an enable signal sent by the automatic parking module, determining that the vehicle is in a braking parking condition;

[0016] The first motor torque is reduced according to the preset torque change rate to obtain the second motor torque.

[0017] Specifically, the method further includes:

[0018] When the brake pedal opening is less than the second pedal opening or the accelerator pedal opening is greater than the third pedal opening, the motor on-off circuit is closed to enable the motor to enter a torque control state.

[0019] Specifically, the method further includes:

[0020] Determine the torque increase rate according to the accelerator pedal opening;

[0021] The second motor torque is increased according to the torque increase rate to obtain the third motor torque.

[0022] In another aspect, an embodiment of the present application further provides a vehicle control device, comprising:

[0023] a determination unit, configured to reduce the first motor torque according to a preset torque change rate to obtain a second motor torque when the vehicle is in a braking parking condition;

[0024] The circuit disconnection unit is used to disconnect the motor on-off circuit between the vehicle power supply module and the motor when the second motor torque is less than the preset motor torque, so that the motor enters a low energy consumption mode.

[0025] Specifically, the determining unit is used to:

[0026] Determining at a first moment that the vehicle is in a braking parking condition;

[0027] At a second moment, the first motor torque is reduced according to a preset torque change rate to obtain the second motor torque; the second moment is after the first moment, and the time interval between the second moment and the first moment is greater than a preset time interval.

[0028] In another aspect, an embodiment of the present application provides a computer device, the computer device comprising a processor and a memory:

[0029] The memory is used to store program code and transmit the program code to the processor;

[0030] The processor is configured to execute the method described above according to the instructions in the program code.

[0031] On the other hand, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and the computer program is used to execute the method described in the above aspects.

[0032] The embodiments of the present application provide a vehicle control method, device, equipment and medium. When the vehicle is in a braking parking condition, the first motor torque is reduced according to a preset torque change rate to obtain a second motor torque. By reducing the motor torque, unnecessary creep torque can be suppressed, thereby suppressing motor heating and reducing energy consumption. Then, when the second motor torque is less than the preset motor torque, the motor on-off circuit between the vehicle power supply module and the motor is disconnected to make the motor enter a low-energy consumption mode, so that the vehicle power supply module will no longer supply power to the motor, and the motor will not consume power at this time, thereby also reducing energy consumption. In other words, this method reduces the energy consumption of the vehicle in many ways by reducing the motor torque and disconnecting the motor on-off circuit, saving electricity, thereby increasing the mileage of electric vehicles and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of a vehicle control method provided in an embodiment of the present application is shown;

[0035] Figure 2 A schematic flow chart of another vehicle control method provided in an embodiment of the present application is shown;

[0036] Figure 3 A schematic flow chart of another vehicle control method provided in an embodiment of the present application is shown;

[0037] Figure 4 A structural block diagram of a vehicle control device provided in an embodiment of the present application;

[0038] Figure 5 A structural diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0041] Secondly, the present application is described in detail with reference to the schematic diagram. When describing the embodiments of the present application in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present application. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0042] To facilitate understanding, a vehicle control method, device, equipment and medium provided in an embodiment of the present application are described in detail below with reference to the accompanying drawings.

[0043] refer to Figure 1 As shown, it is a flow chart of a vehicle control method provided in an embodiment of the present application, and the method may include the following steps.

[0044] S101, when the vehicle is in a braking stop condition, reducing the first motor torque according to a preset torque change rate to obtain a second motor torque.

[0045] In the embodiment of the present application, it is possible to determine whether the vehicle is in a braking stop condition, which can be when the vehicle is braking to stop, especially in congested sections, such as in urban areas with many traffic lights and long idling stop times. Under these conditions, the incidence of motor idling is high, the idling condition accounts for a high proportion, and the power of the electric vehicle is consumed.

[0046] Specifically, a preset torque change rate can be set, and the preset torque change rate can be adjusted according to the vehicle suspension stiffness parameter, so as to improve the stability of the vehicle when the torque decreases. When the vehicle is in a braking parking condition, the torque (locked torque) output by the motor can be reduced from the first motor torque according to the preset torque change rate, and the torque after the reduction is recorded as the second motor torque. By reducing the motor torque, unnecessary creep torque can be suppressed, thereby suppressing motor heating and reducing energy consumption.

[0047] Among them, by presetting a suitable torque change rate, the preset torque change rate can be greater than or equal to 10Nmps and less than or equal to 50Nmps, so that in the process of reducing the torque, the preload force of the motor gear shaft is gradually loosened but never leaves the driving surface. In other words, the gear shafts can contact each other but the mutual force is small, which facilitates the smooth starting of the vehicle.

[0048] In a possible implementation, when the vehicle is in a braking parking condition, the first motor torque is reduced according to a preset torque change rate to obtain the second motor torque. Specifically, the vehicle speed and the brake pedal opening are obtained, and the size of the vehicle speed and the brake pedal opening is determined. When the vehicle speed is lower than the preset vehicle speed, such as the preset vehicle speed is 0.3km / h, and the brake pedal opening is greater than the first pedal opening, such as the first pedal opening is 8pct, it means that the driver has stepped on the brake button and has a parking demand, then it can be determined that the vehicle is in a braking parking condition. Then, the first motor torque is reduced according to the preset torque change rate to obtain the second motor torque. By measuring the vehicle speed and the brake pedal opening to determine whether the vehicle is in a braking parking condition, the accuracy of the determination of the braking parking condition can be improved.

[0049] In an embodiment of the present application, the vehicle may have an automatic parking function (Autohold), which is a function that can achieve automatic braking. By clicking the Autohold button, the user can choose to turn on the automatic parking function or turn off the automatic parking function.

[0050] In another possible implementation, when the vehicle is in a braking parking condition, the first motor torque is reduced according to a preset torque change rate to obtain a second motor torque. When the automatic parking function is turned on, the automatic parking module can determine whether to brake according to information such as vehicle speed or pedal opening. When receiving an enable signal sent by the automatic parking module, it indicates that the user has the intention to slow down and stop the vehicle, and it can be determined that the vehicle is in a braking parking condition. Then, the first motor torque is reduced according to a preset torque change rate to obtain the second motor torque.

[0051] That is to say, when the user does not turn on the automatic parking function, it can be determined whether it is a brake parking condition by judging whether the vehicle speed is lower than the preset speed and whether the brake pedal opening is greater than the first pedal opening. When the user turns on the automatic parking function, it can be determined whether it is a brake parking condition through the signal feedback of the automatic parking module. Of course, it can also be determined by the vehicle speed and the brake pedal opening.

[0052] In an embodiment of the present application, when the vehicle is in a braking parking condition, the first motor torque is reduced according to a preset torque change rate to obtain a second motor torque. Specifically, it is determined at a first moment that the vehicle is in a braking parking condition, and then a delay time is set. The delay time may be, for example, 0.5s. At the second moment, the first motor torque is reduced according to the preset torque change rate to obtain the second motor torque.

[0053] That is to say, the second moment is after the first moment, and the time interval between the second moment and the first moment is greater than the preset time interval. In this way, within the time interval between the second moment and the first moment, the vehicle suspension will have a self-excited oscillation process after parking, and the vehicle will shake when braking to stop. The preset time interval can be the time required for the self-excited oscillation process to end. After the self-excited oscillation ends, the stall torque can be slowly reduced to achieve a decrease in torque. In this way, it is possible to avoid reducing the stall torque during the self-excited oscillation of the suspension, which causes the vehicle to shake violently. The present application reduces the torque after the self-excited oscillation ends, and no gear clearance is generated, so that there is no need for zero-crossing processing in the starting stage, thereby improving the driving experience. If the time interval between the second moment and the first moment is not greater than the preset time interval, that is, the torque is reduced during the oscillation process of the vehicle itself, and a gear shaft clearance may be generated after the torque reduction is completed, then the zero-crossing cannot be cancelled at the next start, otherwise there will be drivability problems; if there is a zero-crossing, it will affect the starting response, resulting in a poor driving experience for the driver.

[0054] S102, when the second motor torque is less than the preset motor torque, disconnecting the motor on-off circuit between the vehicle power supply module and the motor to make the motor enter a low energy consumption mode.

[0055] In the embodiment of the present application, a preset motor torque can be pre-set, and the preset motor torque is a threshold value for switching the working state of the motor, such as 0.3Nm, and the motor can be controlled to enter a low energy consumption mode, such as a sleep mode (Standby), from a torque control mode (TqCtrl), thereby entering a state with very low static loss. The second motor torque can be compared with the preset motor torque to determine whether the working state of the motor can be switched.

[0056] Specifically, the circuit between the vehicle power supply module and the motor can be recorded as a motor on-off circuit, through which the vehicle power supply module can supply power to the motor so that the motor outputs torque. The vehicle power supply module can be, for example, a vehicle battery, etc. When the second motor torque is less than the preset motor torque, the motor on-off circuit can be controlled to be disconnected, and the vehicle power supply module will no longer supply power to the motor. The motor does not consume power at this time, thereby also achieving energy reduction. In other words, this method reduces the energy consumption of the vehicle in many ways by reducing the motor torque and disconnecting the motor on-off circuit, saving electricity, thereby increasing the mileage of the electric vehicle and improving the user experience.

[0057] In the embodiment of the present application, when the vehicle starts, the motor needs to provide sufficient torque to complete the vehicle start. The brake pedal opening or the accelerator pedal opening can be collected. When the driver reduces the brake pedal opening, it indicates that the driver intends to start the vehicle. When the brake pedal opening is less than the second pedal opening, wherein the second pedal opening is less than the first pedal opening, and the second pedal opening can be 4pct, for example, the motor on-off circuit can be controlled to close, so that the motor enters the torque control state from the low energy consumption mode, and the vehicle power supply module can supply power to the motor, and the motor outputs sufficient torque, thereby completing the vehicle start process.

[0058] In another possible implementation, when the driver steps on the accelerator pedal, the accelerator pedal opening can be obtained. When the accelerator pedal opening is greater than the third pedal opening, the third pedal opening can be 0.5pct, indicating that the driver intends to accelerate. The motor on-off circuit can be closed to make the motor enter the torque control state. All control units in the motor will be re-powered, and the "wake-up" time is only 20ms to complete the vehicle start.

[0059] In the embodiment of the present application, the motor torque can be controlled according to the acceleration demand of the driver, and the accelerator pedal opening can be obtained. The larger the accelerator pedal opening, the larger the corresponding torque increase rate, so as to determine the torque increase rate according to the accelerator pedal opening. In this way, the second motor torque is increased according to the torque increase rate to obtain the third motor torque. Since the gear shaft is always attached to the driving surface during the torque reduction process, the gear shaft does not need to be processed by zero crossing during the starting stage. The vehicle starting process is relatively stable, the starting response is fast, and the driver will not feel the power interruption, which ensures the starting smoothness and power, and ensures the comfort of vehicle driving and the high efficiency of power consumption.

[0060] It can be seen that since the motor current on-off and state control jump time is very short, and the gear shaft always remains in a contact state during this process, the whole vehicle has no power response delay or other driving problems during the starting process. It can not only achieve the purpose of reducing energy consumption when the electric vehicle is parked and idling, but also will not trigger driving problems such as motor shaking or starting delay, thereby improving the driving experience.

[0061] refer to Figure 2As shown, it is a flow chart of the motor entering the low energy consumption mode when the motor is stopped, wherein whether to enter the parking state is whether the vehicle speed is lower than the preset speed and whether the brake pedal opening is greater than the first pedal opening, and Autohold is set to whether Autohold enters the enabled state. If so, it enters the Pre-standby state after a delay of a period of time. The Pre-standby state is a state before the motor enters the standby state. When the motor torque reaches the preset value, the motor can be controlled to enter the standby state.

[0062] refer to Figure 3 As shown, it is a flow chart of the motor entering the TqCtrl state when the vehicle starts. It can be determined whether the brake pedal is released to the target value or whether the accelerator pedal is pressed to the target value. If so, the motor can be controlled to enter the TqCtrl state, and then the motor torque can be increased according to the slope required by the driver.

[0063] The embodiment of the present application provides a vehicle control method. When the vehicle is in a braking parking condition, the first motor torque is reduced according to a preset torque change rate to obtain a second motor torque. By reducing the motor torque, unnecessary creep torque can be suppressed, thereby suppressing motor heating and reducing energy consumption. Then, when the second motor torque is less than the preset motor torque, the motor on-off circuit between the vehicle power supply module and the motor is disconnected to make the motor enter a low-energy consumption mode, so that the vehicle power supply module will no longer supply power to the motor, and the motor will not consume power at this time, thereby also reducing energy consumption. In other words, this method reduces the energy consumption of the vehicle in many ways by reducing the motor torque and disconnecting the motor on-off circuit, saving electricity, thereby increasing the mileage of electric vehicles and improving the user experience.

[0064] Based on the above vehicle control method, the present application embodiment also provides a vehicle control device, referring to Figure 4 As shown, it is a structural block diagram of a vehicle control device provided in an embodiment of the present application, and the device may include:

[0065] A determination unit 201, configured to reduce the first motor torque according to a preset torque change rate to obtain a second motor torque when the vehicle is in a braking parking condition;

[0066] The circuit disconnection unit 202 is used to disconnect the motor on-off circuit between the vehicle power supply module and the motor when the second motor torque is less than the preset motor torque, so that the motor enters a low energy consumption mode.

[0067] Specifically, the determining unit is used to:

[0068] Determining at a first moment that the vehicle is in a braking parking condition;

[0069] At a second moment, the first motor torque is reduced according to a preset torque change rate to obtain the second motor torque; the second moment is after the first moment, and the time interval between the second moment and the first moment is greater than a preset time interval.

[0070] Specifically, the determining unit is used to:

[0071] Obtain vehicle speed and brake pedal opening;

[0072] When the vehicle speed is lower than a preset vehicle speed and the brake pedal opening is greater than a first pedal opening, determining that the vehicle is in a braking parking condition;

[0073] The first motor torque is reduced according to the preset torque change rate to obtain the second motor torque.

[0074] Specifically, the determining unit is used to:

[0075] When the automatic parking function is in the on state, upon receiving an enable signal sent by the automatic parking module, determining that the vehicle is in a braking parking condition;

[0076] The first motor torque is reduced according to the preset torque change rate to obtain the second motor torque.

[0077] Specifically, the device also includes:

[0078] The circuit closing unit is used to close the motor on-off circuit when the brake pedal opening is less than the second pedal opening or the accelerator pedal opening is greater than the third pedal opening, so that the motor enters a torque control state.

[0079] Specifically, the device also includes:

[0080] A first determining unit, configured to determine a torque increase rate of change according to an accelerator pedal opening;

[0081] The adjustment unit is used to increase the second motor torque according to the torque increase rate to obtain the third motor torque.

[0082] The embodiment of the present application provides a vehicle control device, a determination unit, which is used to reduce the first motor torque according to a preset torque change rate to obtain a second motor torque when the vehicle is in a braking parking condition. By reducing the motor torque, unnecessary creep torque can be suppressed, thereby suppressing motor heating and reducing energy consumption. Then, a circuit disconnection unit is used to disconnect the motor on-off circuit between the vehicle power supply module and the motor when the second motor torque is less than the preset motor torque, so that the motor enters a low-energy consumption mode, so that the vehicle power supply module will no longer supply power to the motor, and the motor will not consume electricity at this time, thereby also reducing energy consumption. In other words, this method reduces the energy consumption of the vehicle in many ways by reducing the motor torque and disconnecting the motor on-off circuit, saving electricity, thereby increasing the mileage of the electric vehicle and improving the user experience.

[0083] In another aspect, the present application provides a computer device, referring to Figure 5 , which is a structural diagram of a computer device provided in an embodiment of the present application, wherein the computer device includes a processor 310 and a memory 320:

[0084] The memory 320 is used to store program codes and transmit the program codes to the processor 310;

[0085] The processor 310 is used to execute the method provided in the above embodiment according to the instructions in the program code.

[0086] The computer device may include a terminal device or a server, and the aforementioned apparatus may be configured in the computer device.

[0087] On the other hand, an embodiment of the present application further provides a storage medium, wherein the storage medium is used to store a computer program, and the computer program is used to execute the method provided by the above embodiment.

[0088] A person skilled in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by program instruction hardware, and the above program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the above storage medium can be at least one of the following media: read-only memory (English: Read-only Memory, abbreviated: ROM), RAM, magnetic disk or optical disk, etc. Various media that can store program codes.

[0089] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0090] The above is only a preferred implementation of the present application. Although the present application has been disclosed as a preferred embodiment, it is not intended to limit the present application. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present application without departing from the scope of the technical solution of the present application, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still falls within the scope of protection of the technical solution of the present application.

Claims

1. A vehicle control method, characterized in that: include: When the vehicle is in a braking parking condition, the first motor torque is reduced according to a preset torque change rate to obtain a second motor torque; When the second motor torque is less than the preset motor torque, the motor on-off circuit between the vehicle power supply module and the motor is disconnected to make the motor enter a low energy consumption mode.

2. The method according to claim 1, characterized in that When the vehicle is in a braking parking condition, reducing the first motor torque according to a preset torque change rate to obtain the second motor torque includes: Determining at a first moment that the vehicle is in a braking parking condition; At a second moment, the first motor torque is reduced according to a preset torque change rate to obtain the second motor torque; the second moment is after the first moment, and the time interval between the second moment and the first moment is greater than a preset time interval.

3. The method according to claim 1, characterized in that: When the vehicle is in a braking parking condition, reducing the first motor torque according to a preset torque change rate to obtain the second motor torque includes: Obtain vehicle speed and brake pedal opening; When the vehicle speed is lower than a preset vehicle speed and the brake pedal opening is greater than a first pedal opening, determining that the vehicle is in a braking parking condition; The first motor torque is reduced according to the preset torque change rate to obtain the second motor torque.

4. The method according to claim 1, characterized in that: When the vehicle is in a braking parking condition, reducing the first motor torque according to a preset torque change rate to obtain the second motor torque includes: When the automatic parking function is in the on state, upon receiving an enable signal sent by the automatic parking module, determining that the vehicle is in a braking parking condition; The first motor torque is reduced according to the preset torque change rate to obtain the second motor torque.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: When the brake pedal opening is less than the second pedal opening or the accelerator pedal opening is greater than the third pedal opening, the motor on-off circuit is closed to enable the motor to enter a torque control state.

6. The method according to claim 5, characterized in that The method further comprises: Determine the torque increase rate according to the accelerator pedal opening; The second motor torque is increased according to the torque increase rate to obtain the third motor torque.

7. A vehicle control device, characterized in that: include: a determination unit, configured to reduce the first motor torque according to a preset torque change rate to obtain a second motor torque when the vehicle is in a braking parking condition; The circuit disconnection unit is used to disconnect the motor on-off circuit between the vehicle power supply module and the motor when the second motor torque is less than the preset motor torque, so that the motor enters a low energy consumption mode.

8. The device according to claim 7, characterized in that The determining unit is used for: Determining at a first moment that the vehicle is in a braking parking condition; At a second moment, the first motor torque is reduced according to a preset torque change rate to obtain the second motor torque; the second moment is after the first moment, and the time interval between the second moment and the first moment is greater than a preset time interval.

9. A computer device, characterized in that: The computer device comprises a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is configured to execute the method according to any one of claims 1 to 6 according to the instructions in the program code.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program is used to execute the method according to any one of claims 1 to 6.

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