Vehicle control method, device, storage medium, electronic device and vehicle

Abstract

The present disclosure relates to a method, device, storage medium, electronic device and vehicle for controlling a vehicle, the method comprising: obtaining an engine speed and a maximum engine speed of a vehicle; determining, when a difference between the engine speed and the maximum engine speed meets a preset condition, a target speed difference range in which the difference between the engine speed and the maximum engine speed lies from a plurality of preset speed difference ranges; determining a motor torque coefficient corresponding to the target speed difference range, wherein different preset speed difference ranges correspond to different motor torque coefficients; and adjusting a target output torque of the vehicle motor according to the motor torque coefficient corresponding to the target speed difference range to reduce the target output torque, thereby avoiding the actual engine speed from exceeding the maximum engine speed that the engine can withstand, effectively protecting the engine, and facilitating extending the service life of the engine, thereby greatly improving the user experience.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle control, and in particular, to a vehicle control method, device, storage medium, electronic device, and vehicle. Background Art

[0002] When designing the vehicle's engine hardware, the maximum engine speed limit will be defined, that is, the highest speed the engine can withstand. If the engine continues to operate at a speed higher than this maximum speed, it will have a certain impact on the service life of the engine hardware.

[0003] In the prior art, when the engine speed is greater than or equal to a preset speed threshold, the vehicle will execute an active fuel cut-off protection strategy, that is, limiting or even cutting off the fuel supply to the engine according to the actual engine speed in order to reduce the engine speed.

[0004] However, if the driver steps on the accelerator pedal to a great extent, even if the vehicle executes the engine's active fuel cut-off protection strategy, the engine speed may continue to rise, thereby affecting the engine's life. Summary of the Invention

[0005] In order to solve the above problems, the present disclosure provides a vehicle control method, device, storage medium, electronic device and vehicle.

[0006] In a first aspect, a method for controlling a vehicle is provided, the method comprising: obtaining an engine speed and a maximum engine speed of the vehicle;

[0007] When the difference between the engine speed and the maximum speed meets a preset condition, a target speed difference range within which the difference between the engine speed and the maximum speed lies is determined from a plurality of preset speed difference ranges; a motor torque coefficient corresponding to the target speed difference range is determined, with different preset speed difference ranges corresponding to different motor torque coefficients; and the target output torque of the vehicle motor is adjusted according to the motor torque coefficient corresponding to the target speed difference range to reduce the target output torque.

[0008] Optionally, the interval of the preset speed difference range approaches zero as the engine speed increases when the engine speed is less than the maximum speed; the motor torque coefficient corresponds to the preset speed difference range, and decreases as the interval of the preset speed difference range approaches zero; the motor torque coefficient corresponding to the first preset speed difference range is zero, and the first preset speed difference range is the speed difference range in which the difference between the engine speed and the maximum speed lies when the engine speed is greater than or equal to the maximum speed.

[0009] Optionally, the target output torque includes the maximum output torque of the motor; or the distributed torque of the motor.

[0010] Optionally, the method further includes: controlling the engine to enter an idle state when the difference between the engine speed and the maximum speed meets a preset condition.

[0011] Optionally, the method further includes: issuing an alarm message when the difference between the engine speed and the maximum speed meets a preset condition, wherein the alarm message is used to indicate that the engine speed is abnormal.

[0012] In a second aspect, a vehicle control device is provided, the device comprising:

[0013] An acquisition module, used to obtain the engine speed and maximum engine speed of the vehicle;

[0014] a determination module, configured to determine, if the difference between the engine speed and the maximum speed satisfies a preset condition, a target speed difference range in which the difference between the engine speed and the maximum speed lies from a plurality of preset speed difference ranges;

[0015] A query module, configured to determine a motor torque coefficient corresponding to the target speed difference range, wherein different preset speed difference ranges correspond to different motor torque coefficients;

[0016] A control module is configured to adjust the target output torque of the vehicle motor according to a motor torque coefficient corresponding to the target speed difference range to reduce the target output torque.

[0017] Optionally, the interval of the preset speed difference range approaches zero as the engine speed increases when the engine speed is less than the maximum speed; the motor torque coefficient corresponds to the preset speed difference range, and decreases as the interval of the preset speed difference range approaches zero; the motor torque coefficient corresponding to the first preset speed difference range is zero, and the first preset speed difference range is the speed difference range in which the difference between the engine speed and the maximum speed lies when the engine speed is greater than or equal to the maximum speed.

[0018] Optionally, the target output torque includes the maximum output torque of the motor; or the distributed torque of the motor.

[0019] Optionally, the control module is further configured to control the engine to enter an idle state when a difference between the engine speed and the maximum speed meets a preset condition.

[0020] Optionally, the device further includes an alarm module, configured to issue an alarm message when the difference between the engine speed and the maximum speed meets a preset condition, wherein the alarm message is used to indicate that the engine speed is abnormal.

[0021] According to a third aspect, a non-temporary computer-readable storage medium is provided, on which a computer program is stored, which implements the steps of the above method when executed by a processor.

[0022] In a fourth aspect, an electronic device is provided, comprising: a memory on which a computer program is stored; and a processor for executing the computer program in the memory to implement the steps of the above method.

[0023] In a fifth aspect, a vehicle is provided, comprising the above-mentioned electronic device.

[0024] By adopting the above technical solution, when the difference between the engine speed and the maximum speed meets the preset conditions, the output torque of the motor is adjusted according to the difference, thereby limiting the increase in the vehicle shaft speed to avoid the engine speed being driven up. In this way, the actual engine speed is prevented from exceeding the maximum speed that the engine can withstand, effectively protecting the engine, which is conducive to extending the service life of the engine and greatly improving the user experience.

[0025] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0027] Figure 1 is a flow chart of a vehicle control method according to an exemplary embodiment;

[0028] Figure 2 is a flow chart of another vehicle control method according to an exemplary embodiment;

[0029] Figure 3 is a flow chart of a third vehicle control method according to an exemplary embodiment;

[0030] Figure 4 is a block diagram of a vehicle control device according to an exemplary embodiment;

[0031] Figure 5 is a block diagram of another vehicle control device according to an exemplary embodiment;

[0032] Figure 6is a block diagram of an electronic device according to an exemplary embodiment;

[0033] Figure 7 is a block diagram of a vehicle according to an exemplary embodiment. DETAILED DESCRIPTION

[0034] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0035] First, the application scenario of the present disclosure is explained. The present disclosure can be applied to the scenario of vehicle control. In this scenario, the vehicle's engine is running at high speed. If it is not restricted, the engine speed is likely to exceed the maximum speed that the engine can withstand, which will cause certain damage to the engine hardware and affect the service life of the engine.

[0036] In order to prevent the engine speed from exceeding the maximum speed it can withstand, some methods are used in the prior art to limit it, such as the active fuel cut-off protection strategy, which limits or even cuts off the fuel supply to the engine according to the actual engine speed to reduce the engine speed.

[0037] However, the inventors have discovered that for hybrid vehicles, for example, vehicles equipped with a P2 hybrid architecture and a P2P4 hybrid architecture, during actual driving of the vehicle, if the driver requires a higher driving torque, such as stepping on the accelerator pedal to a greater extent but the transmission does not shift gears, the output torque of the vehicle's motor will increase, which in turn will drive the engine speed to increase, resulting in the engine speed still exceeding the maximum speed after limiting or even cutting off the engine's fuel supply.

[0038] In order to solve the above problems, the present disclosure provides a vehicle control method, device, storage medium, electronic device and vehicle. The method can limit the output torque of the motor according to the difference between the engine speed and the maximum speed when the difference between the engine speed and the maximum speed meets the preset conditions, thereby ensuring that the engine will not be dragged to cause the speed to exceed the maximum speed.

[0039] The present disclosure is described below with reference to specific embodiments.

[0040] Figure 1 A vehicle control method provided by an embodiment of the present disclosure is as follows: Figure 1 As shown, the method includes:

[0041] S101: Obtain the engine speed and maximum engine speed of the vehicle.

[0042] Among them, the engine speed can be obtained through a speed sensor, which can be set at the crankshaft position of the vehicle. The maximum speed of the engine can be the maximum speed that the engine can withstand without affecting its own service life, and the maximum speed of the engine can be obtained through the engine.

[0043] S102: When the difference between the engine speed and the maximum speed meets a preset condition, determine a target speed difference range in which the difference between the engine speed and the maximum speed lies from a plurality of preset speed difference ranges.

[0044] The preset condition indicates that the engine speed has a tendency to exceed the maximum speed. Specifically, if the difference between the engine speed and the maximum speed is the difference obtained by subtracting the engine speed from the maximum speed, the preset condition includes that the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to a first preset speed threshold. If the difference between the engine speed and the maximum speed is the difference obtained by subtracting the maximum speed from the engine speed, the preset condition includes that the difference obtained by subtracting the engine speed from the maximum speed is greater than or equal to a second preset speed threshold.

[0045] Step S102 is described below using the example of a difference between the engine speed and the maximum speed being the difference obtained by subtracting the engine speed from the maximum speed. The first preset speed difference threshold may be a warning difference value indicating that the engine speed is approaching the maximum speed that the engine can withstand. If the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to the first preset speed difference threshold, to prevent the engine speed from continuing to rise above the maximum speed that the engine can withstand, a target speed difference range for the current engine speed may be determined from a plurality of preset speed difference ranges. Then, steps S103-S104 are performed based on the target speed difference range. The plurality of preset speed difference ranges are used to indicate the multiple stages of the engine speed.

[0046] In a possible implementation, the engine is in a non-fault state, and the first preset speed difference threshold may be 300 rpm.

[0047] For example, the plurality of preset speed difference ranges may be (300 rpm, 200 rpm), (200 rpm, 100 rpm), (100 rpm, 50 rpm), (50 rpm, 0 rpm) and below 0 rpm. If the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 300 rpm and greater than 200 rpm, the difference obtained by subtracting the engine speed from the maximum speed is determined to be within the target speed difference range of (300 rpm, 200 rpm); if the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 200 rpm and greater than 100 rpm, the difference obtained by subtracting the engine speed from the maximum speed is determined to be within the target speed difference range of (200 rpm, 100 rpm); if the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 100 rpm and greater than 50 rpm, the difference obtained by subtracting the engine speed from the maximum speed is determined to be within the target speed difference range of (100 rpm, 50 rpm); if the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 50 rpm and greater than 0 rpm, the difference obtained by subtracting the engine speed from the maximum speed is determined to be within the target speed difference range of (50 rpm, 0 rpm); and if the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 0 rpm, the engine speed is determined to be above the maximum speed.

[0048] In another possible implementation, the engine is in a fault state. In order to prevent the engine from further malfunctioning, the preset speed difference threshold may be appropriately increased, for example, to 500 rpm.

[0049] For example, the plurality of preset speed difference ranges may be (500rpm, 300rpm), (300rpm, 200rpm), (200rpm, 100rpm), (100rpm, 50rpm), (50rpm, 0rpm) and less than 0rpm. When the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 500rpm and greater than 300rpm, it is determined that the difference obtained by subtracting the engine speed from the maximum speed is within the target speed difference range of (500rpm, 300rpm); when the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 300rpm and greater than 200rpm, it is determined that the difference obtained by subtracting the engine speed from the maximum speed is within the target speed difference range of (300rpm, 200rpm); when the difference obtained by subtracting the engine speed from the maximum speed is less than or equal to 200rpm and greater than 100rpm, it is determined that the difference obtained by subtracting the engine speed from the maximum speed is within the target speed difference range of ( When the difference between the maximum speed and the engine speed is less than or equal to 100 rpm and greater than 50 rpm, it is determined that the difference between the maximum speed and the engine speed is within the target speed difference range of (100 rpm, 50 rpm); when the difference between the maximum speed and the engine speed is less than or equal to 50 rpm and greater than 0 rpm, it is determined that the difference between the maximum speed and the engine speed is within the target speed difference range of (50 rpm, 0 rpm); when the difference between the maximum speed and the engine speed is less than or equal to 0 rpm, it is determined that the speed of the engine is above the maximum speed.

[0050] In the case where the difference between the engine speed and the maximum speed is the difference obtained by subtracting the maximum speed from the engine speed, it is similar to the above embodiment and will not be described in detail here.

[0051] It should be noted that the above-mentioned maximum speed, preset speed difference threshold and multiple preset speed difference ranges can be preset according to different engine types and models or experimental values. They are only used for illustration here and are not used to limit the present disclosure.

[0052] S103: Determine the motor torque coefficient corresponding to the target speed difference range.

[0053] Among them, different preset speed difference ranges correspond to different motor torque coefficients, and the motor torque coefficient is used to adjust the output torque of the motor. The motor torque coefficient corresponding to the engine speed can be obtained through the preset coefficient correspondence relationship. The preset coefficient correspondence relationship includes the motor torque coefficients corresponding to different preset speed difference ranges.

[0054] Among them, the interval of the preset speed difference range approaches zero as the engine speed increases when the engine speed is less than the maximum speed; the motor torque coefficient decreases as the interval of the preset speed difference range approaches zero; the motor torque coefficient corresponding to the first preset speed difference range is zero, and the first preset speed difference range is the speed difference range in which the difference between the engine speed and the maximum speed is located when the engine speed is greater than or equal to the maximum speed.

[0055] For example, taking the difference as the difference obtained by subtracting the engine speed from the maximum speed as an example, in a possible implementation, the engine is in a fault-free state, and the preset coefficient correspondence relationship can be as shown in Table 1.

[0056]

[0057] Table 1

[0058] In another possible implementation, the engine is in a fault state, and the preset coefficient correspondence relationship may be as shown in Table 2:

[0059]

[0060] Table 2

[0061] As can be seen from Table 1 and / or Table 2 above, when the difference between the maximum speed and the engine speed is less than or equal to the preset speed difference threshold, different preset speed difference ranges correspond to different motor torque coefficients, and the motor torque coefficient exhibits a decreasing gradient, decreasing as the motor torque coefficient approaches the maximum speed that the engine can withstand. When the engine speed is greater than or equal to the maximum speed that the engine can withstand, the motor's torque output is stopped.

[0062] In the case where the difference is the difference obtained by subtracting the maximum speed from the engine speed, reference is made to the above embodiment and no further details are given here.

[0063] S104 : Adjust the target output torque of the vehicle motor according to the motor torque coefficient corresponding to the target speed difference range to reduce the target output torque.

[0064] The target output torque may include the maximum output torque of the motor or the distributed torque of the motor. The distributed torque of the motor represents the output torque instructed by the vehicle to the motor. For example, the distributed torque may be the torque instructed to be output by the motor after the user presses the accelerator pedal, based on the degree of accelerator pedal opening, vehicle speed, and driving mode, so that the vehicle can quickly respond to the driver's driving intention.

[0065] In a possible implementation, when the target output torque includes the maximum output torque of the motor, the product of the motor torque coefficient and the maximum output torque of the motor may be used as the adjusted maximum output torque.

[0066] Among them, when the difference between the engine speed and the maximum speed meets the preset conditions and the engine speed is less than the maximum speed, the motor torque coefficient decreases gradually as the engine speed increases, thereby gradually increasing the limit on the maximum output torque of the motor to prevent the engine speed from being driven to continue to rise.

[0067] In another possible implementation, when the target output torque includes the distributed torque of the motor, the product of the motor torque coefficient and the distributed torque of the motor may be used as the adjusted output torque.

[0068] In this step, after obtaining the corresponding motor torque coefficient according to the engine speed, the product of the motor torque coefficient and the distributed torque of the motor is used as the adjusted distributed torque of the motor, thereby reducing the actual required output torque of the motor and preventing the engine speed from being driven to continue to rise.

[0069] By adopting the above method, when the difference between the engine speed and the maximum speed meets the preset conditions, the output torque of the motor can be restricted to different degrees according to the speed of the engine, and the control of the output torque of the motor can be gradually increased. Ultimately, the output torque of the motor can be controlled so as not to cause the speed of the engine to increase further, thereby ensuring that the hardware of the engine will not be damaged, which is beneficial to extending the service life of the engine and improving the user experience.

[0070] In another embodiment of the present disclosure, while limiting the output torque of the motor, the state of the engine can also be controlled, such as Figure 2 As shown, in Figure 1 Based on the steps shown, the embodiment of the present disclosure may further include the following steps:

[0071] S105: Control the engine to enter an idle state.

[0072] In this step, while limiting the output torque of the motor, in order to further prevent the engine speed from increasing, such as when the vehicle's active fuel cut-off protection strategy fails, the engine is controlled to enter an idle state so that the engine no longer receives the torque output demand sent by the vehicle, thereby controlling the speed to a lower level.

[0073] In this way, it can further ensure that the engine speed is controlled within the maximum speed range that the transmitter can withstand, avoiding the situation where the engine speed exceeds the maximum speed in some special circumstances, which is conducive to strengthening the limit on the engine speed.

[0074] exist Figure 2 Based on the steps shown, Figure 3 As shown, when the engine speed exceeds the preset speed threshold, a warning message may be issued:

[0075] S106: Issue an alarm message.

[0076] The warning information is used to indicate that the engine speed is abnormal.

[0077] In this way, when the difference between the engine speed and the maximum speed meets the preset condition, the driver can be warned to prompt the driver to shift gears or reduce the degree of depression of the accelerator pedal.

[0078] Figure 4 A vehicle control device provided by an embodiment of the present disclosure, such as Figure 4 As shown, the device includes:

[0079] An acquisition module 401 is used to acquire the engine speed and the maximum engine speed of the vehicle;

[0080] a determination module 402 for determining, if the difference between the engine speed and the maximum speed satisfies a preset condition, a target speed difference range in which the difference between the engine speed and the maximum speed lies from a plurality of preset speed difference ranges;

[0081] A query module 403 is used to determine the motor torque coefficient corresponding to the target speed difference range, where different preset speed difference ranges correspond to different motor torque coefficients;

[0082] The control module 404 is configured to adjust the target output torque of the vehicle motor according to the motor torque coefficient corresponding to the target speed difference range to reduce the target output torque, where the target output torque includes the maximum output torque of the motor; or the distributed torque of the motor.

[0083] The query module 403 is configured to obtain the motor torque coefficient corresponding to the engine speed through a preset coefficient correspondence relationship, wherein the preset coefficient correspondence relationship includes motor torque coefficients corresponding to different preset speed difference ranges.

[0084] The interval of the preset speed difference range approaches zero as the engine speed increases when the engine speed is less than the maximum speed; the motor torque coefficient corresponds to the preset speed difference range, and decreases as the interval of the preset speed difference range approaches zero; the motor torque coefficient corresponding to the first preset speed difference range is zero, and the first preset speed difference range is the speed difference range in which the difference between the engine speed and the maximum speed lies when the engine speed is greater than or equal to the maximum speed.

[0085] The control module 404 is also used to control the engine to enter an idle state.

[0086] By adopting the above-mentioned device, when the difference between the engine speed and the maximum speed meets the preset conditions, the output torque of the motor can be restricted to different degrees according to the difference between the engine speed and the maximum speed, and the control of the output torque of the motor can be gradually increased. Ultimately, the output torque of the motor can be controlled so as not to cause the speed of the engine to increase further. In addition, controlling the engine to be in an idle state avoids the situation where the engine speed exceeds the maximum speed in some special circumstances, thereby ensuring that the hardware of the engine will not be damaged, which is beneficial to extending the service life of the engine and improving the user experience.

[0087] In addition, based on the above device, Figure 5 As shown, the device further includes an alarm module 405 for issuing an alarm message, wherein the alarm message is used to indicate that the engine speed is abnormal.

[0088] In this way, when the difference between the engine speed and the maximum speed meets the preset conditions, the driver can be warned to prompt the driver to change gears or reduce the degree of depression of the accelerator pedal, which is beneficial to further avoid affecting the service life of the engine.

[0089] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0090] Figure 6 FIG. 6 is a block diagram of an electronic device 600 according to an exemplary embodiment. Figure 6 As shown, the electronic device 600 may include: a processor 601 , a memory 602 , and may further include one or more of an input / output (I / O) interface 603 and a communication component 604 .

[0091] The processor 601 is used to control the overall operation of the electronic device 600 to complete all or part of the steps in the above-mentioned vehicle control method. The memory 602 is used to store various types of data to support the operation of the electronic device 600. For example, this data may include instructions for any application or method operating on the electronic device 600, as well as application-related data. The memory 602 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The communication component 604 is used for wired or wireless communication between the electronic device 600 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination thereof, is not limited here. Therefore, the corresponding communication component 604 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0092] In an exemplary embodiment, the electronic device 600 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to execute the above-mentioned vehicle control method.

[0093] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided. When executed by a processor, the program instructions implement the steps of the above-described vehicle control method. For example, the computer-readable storage medium may be the aforementioned memory 602 including the program instructions. The program instructions may be executed by the processor 601 of the electronic device 600 to perform the above-described vehicle control method.

[0094] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device, and has a code portion for performing the above-mentioned vehicle control method when executed by the programmable device.

[0095] Figure 7 The present disclosure provides a vehicle 100, such as Figure 7 As shown, the vehicle 100 includes the electronic device 600 described above.

[0096] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0097] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0098] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vehicle control method, characterized in that: Applied to a hybrid vehicle, the method includes: Get the vehicle's engine speed and maximum engine speed; When the difference between the engine speed and the maximum speed meets a preset condition, determining a target speed difference range in which the difference between the engine speed and the maximum speed lies from a plurality of preset speed difference ranges; Determining a motor torque coefficient corresponding to the target speed difference range, where different preset speed difference ranges correspond to different motor torque coefficients; The target output torque of the vehicle motor is adjusted according to the motor torque coefficient corresponding to the target speed difference range, so as to reduce the engine speed after the fuel supply to the engine is cut off.

2. The method according to claim 1, characterized in that The interval of the preset speed difference range approaches zero as the engine speed increases when the engine speed is less than the maximum speed; The motor torque coefficient decreases as the interval of the preset speed difference range approaches zero; The motor torque coefficient corresponding to the first preset speed difference range is zero. The first preset speed difference range is the speed difference range in which the difference between the engine speed and the maximum speed lies when the engine speed is greater than or equal to the maximum speed.

3. The method according to claim 1, characterized in that The target output torque includes the maximum output torque of the motor; or the distributed torque of the motor.

4. The method according to claim 1, wherein When the difference between the engine speed and the maximum speed meets a preset condition, the method further includes: The engine is controlled to enter an idle state.

5. The method according to any one of claims 1 to 4, characterized in that When the difference between the engine speed and the maximum speed meets a preset condition, the method further includes: A warning message is issued, where the warning message is used to indicate that the engine speed is abnormal.

6. A vehicle control device, characterized in that: Applied to a hybrid vehicle, the device comprises: An acquisition module, used to obtain the engine speed and maximum engine speed of the vehicle; a determination module, configured to determine, if the difference between the engine speed and the maximum speed satisfies a preset condition, a target speed difference range in which the difference between the engine speed and the maximum speed lies from a plurality of preset speed difference ranges; A query module, configured to determine a motor torque coefficient corresponding to the target speed difference range, wherein different preset speed difference ranges correspond to different motor torque coefficients; A control module is configured to adjust the target output torque of the vehicle motor according to the motor torque coefficient corresponding to the target speed difference range, so as to reduce the engine speed after cutting off the fuel supply to the engine.

7. The device according to claim 6, characterized in that The device further comprises: The alarm device is used to issue an alarm message when the difference between the engine speed and the maximum speed meets a preset condition.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to claims 1 to 5 are implemented.

9. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 5.

10. A vehicle, characterized in that: The vehicle includes the electronic device according to claim 9.

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