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

Abstract

The invention discloses a vehicle downshift control method and device, electronic equipment, a storage medium and a vehicle, and relates to the technical field of mechanical automatic transmission control, and the vehicle downshift control method comprises the steps that according to the current vehicle driving working condition of the vehicle, the target gear of vehicle downshift is determined, and the current vehicle speed of the vehicle and the speed ratio of the target gear are obtained; calculating an ideal rotating speed of an engine according to the vehicle speed and the speed ratio, and determining a compensation rotating speed of the engine according to the vehicle driving working condition; determining a target rotating speed of the engine according to the ideal rotating speed of the engine and the compensated rotating speed of the engine; and controlling the gear of the vehicle to the target gear in response to the engine rotating speed reaching the target engine rotating speed. Therefore, the target rotating speed of the downshift engine is more reasonable, the downshift of the vehicle can be smoothly and accurately realized, and the gear shifting quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical automatic transmission control, and in particular to a vehicle downshift control method, a vehicle downshift control device, an electronic device, a storage medium and a vehicle. BACKGROUND

[0002] In the field of commercial vehicles, an automated mechanical transmission (AMT) has been widely used due to its automatic operation, which can improve driving convenience and reduce driver fatigue.

[0003] Commercial vehicles have the characteristics of large load variation and complex driving conditions. AMT downshift control, as a key technology, plays a decisive role in vehicle driving safety and performance.

[0004] Therefore, during the downshift process, the clutch engagement and engine torque need to be coordinated to achieve rapid, smooth and accurate downshift operation. SUMMARY

[0005] The purpose of the present application is to provide a vehicle downshift control method, a vehicle downshift control device, an electronic device, a storage medium and a vehicle, which at least solve the technical problem of how to coordinate the clutch engagement and engine torque to achieve rapid, smooth and accurate downshift operation.

[0006] The present application provides the following solutions:

[0007] According to one aspect of the present application, a vehicle downshift control method is provided, comprising:

[0008] According to the current vehicle driving condition of the vehicle, the target gear of the vehicle downshift is determined, and the current vehicle speed of the vehicle and the speed ratio of the target gear are obtained;

[0009] According to the vehicle speed and the speed ratio, the engine ideal speed is calculated, and the engine compensation speed is determined according to the vehicle driving condition;

[0010] According to the engine ideal speed and the engine compensation speed, the engine target speed is determined;

[0011] In response to the engine speed reaching the engine target speed, the gear of the vehicle is controlled to the target gear.

[0012] Further, the obtaining of the current vehicle speed of the vehicle and the speed ratio of the target gear comprises:

[0013] The separation stage of the vehicle clutch is determined, and the clutch is controlled to separate according to the duty cycle corresponding to the separation stage;

[0014] In response to completion of the clutch disengagement, performing a neutral operation on the gear of the vehicle, obtaining a current vehicle speed of the vehicle and a speed ratio of the target gear.

[0015] Further, the control of the clutch to disengage according to the duty cycle corresponding to the disengagement stage comprises:

[0016] determining a first duty cycle corresponding to a first disengagement stage, and controlling the clutch to disengage based on the first duty cycle;

[0017] In response to the clutch disengaging to a first friction point position, determining a second duty cycle corresponding to a second disengagement stage;

[0018] controlling the clutch to disengage from the first friction point position according to the second duty cycle, until the clutch disengages from the first friction point position to a second friction point position;

[0019] controlling the clutch based on the first duty cycle until the clutch completes disengagement.

[0020] Further, the determination of the engine compensation speed according to the driving condition of the vehicle comprises:

[0021] obtaining a current driving condition of the vehicle, and determining a sliding resistance of the vehicle according to the driving condition;

[0022] determining a current engine slope compensation speed and an engine acceleration compensation speed of the vehicle based on the sliding resistance and the vehicle speed;

[0023] determining an engine compensation speed according to the engine slope compensation speed and the engine acceleration compensation speed.

[0024] Further, the determination of the current engine slope compensation speed of the vehicle comprises:

[0025] In response to the current vehicle being in an uphill state, determining the engine slope compensation speed as a positive compensation;

[0026] or

[0027] In response to the current vehicle being in a downhill state, determining the engine slope compensation speed as a negative compensation.

[0028] Further, the control of the gear of the vehicle to the target gear comprises:

[0029] controlling the clutch of the vehicle to engage based on the first duty cycle;

[0030] In response to the clutch being engaged to the third friction point position, the clutch is engaged according to a pre-calibrated torque control slope and the second duty ratio until the clutch enters a lockup stage;

[0031] The clutch is engaged according to the first duty ratio until the clutch is engaged completely.

[0032] According to two aspects of the present application, a vehicle downshift control device is provided, comprising:

[0033] A data acquisition module is configured to determine a target gear of the vehicle downshift according to a current vehicle driving condition of the vehicle, and acquire a current vehicle speed of the vehicle and a speed ratio of the target gear;

[0034] A compensation speed determination module is configured to calculate an ideal engine speed according to the vehicle speed and the speed ratio, and determine an engine compensation speed according to the vehicle driving condition;

[0035] A target speed determination module is configured to determine an engine target speed according to the ideal engine speed and the engine compensation speed;

[0036] A downshift control module is configured to control the gear of the vehicle to the target gear in response to the engine speed reaching the engine target speed.

[0037] According to three aspects of the present application, an electronic device is provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

[0038] The memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the vehicle downshift control method.

[0039] According to four aspects of the present application, a computer readable storage medium is provided, comprising a computer program executable by an electronic device, and when the computer program is executed on the electronic device, the electronic device executes the steps of the vehicle downshift control method.

[0040] According to five aspects of the present application, a vehicle is provided, comprising:

[0041] An electronic device is configured to implement the steps of the vehicle downshift control method;

[0042] A processor is configured to run a program, and when the program is running, the data output from the electronic device executes the steps of the vehicle downshift control method;

[0043] A storage medium is configured to store a program, and when the program is running, the data output from the electronic device executes the steps of the vehicle downshift control method.

[0044] Through the above scheme, the following beneficial technical effects are obtained:

[0045] The present application calculates the ideal engine speed through the current vehicle speed and the speed ratio of the target gear, and determines the engine compensation speed according to the vehicle driving condition, so as to compensate the ideal engine speed on the basis of the ideal engine speed, that is, to introduce engine speed compensation to offset the power interruption in the shifting process, to coordinate the control of the engine, the clutch and the gear shifting actuator, and to prepare for the realization of rapid, smooth and accurate downshift operation.

[0046] The present application determines the engine target speed for realizing the downshift operation through the engine compensation speed and the ideal engine speed, so that the engine target speed for downshift is more reasonable, and the vehicle downshift can be realized smoothly and accurately, and the shifting quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a flowchart of a vehicle downshift control method provided by one or more embodiments of the present application.

[0048] Figure 2 is a flowchart of a downshift control method provided by one specific embodiment of the present application.

[0049] Figure 3 is a structural diagram of a vehicle downshift control device provided by one or more embodiments of the present application.

[0050] Figure 4 is a structural block diagram of an electronic device for a vehicle downshift control method provided by one or more embodiments of the present application. DETAILED DESCRIPTION

[0051] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0052] Figure 1 is a flowchart of a vehicle downshift control method provided by one or more embodiments of the present application.

[0053] As Figure 1 shown, the vehicle downshift control method comprises:

[0054] Step S1, according to the current vehicle driving condition of the vehicle, the target gear for vehicle downshift is determined, and the current vehicle speed and the speed ratio of the target gear are obtained.

[0055] In the embodiment, the driving condition of the vehicle is determined by the information of the real-time acquired accelerator opening degree, brake signal, vehicle load, slope, etc., so as to determine whether the downshift condition is met.

[0056] If the preset downshift condition is met during the driving of the vehicle, the downshift operation is triggered, and the target engine speed is calculated according to the current driving condition of the vehicle, so as to realize the downshift requirement.

[0057] The downshift condition can be set with corresponding trigger conditions according to different situations, for example, the opening degree of the accelerator pedal is detected to reach a preset range, and it is determined that the downshift operation is triggered. When it is detected that the current power of the vehicle cannot meet the driving requirement and the power needs to be increased, it is determined that the downshift operation is triggered.

[0058] Further, the target gear position of the vehicle after the downshift operation is determined, and the clutch is controlled to separate the clutch after the neutral gear operation is completed. The current speed of the vehicle and the speed ratio of the target gear position are acquired.

[0059] In step S2, the ideal engine speed is calculated according to the vehicle speed and the speed ratio, and the engine compensation speed is determined according to the driving condition of the vehicle.

[0060] In the embodiment, the calculation formula of the ideal engine speed is as follows:

[0061]

[0062] In the formula, the ideal engine speed is represented, the current vehicle speed is represented, the speed ratio of the target gear position is represented, and the constant for converting the vehicle speed km / h into the speed rpm is represented.

[0063] The ideal engine speed can be understood as the ideal engine speed in the ideal state after excluding all influencing factors.

[0064] In the actual driving process of a vehicle, especially a commercial vehicle, the working condition is relatively complex, and the ideal engine speed cannot meet the demand. For example, when the vehicle is heavily loaded and climbs uphill, the vehicle has a great tendency to decelerate due to the friction between the vehicle and the ground and the gravity of the vehicle itself. During the downshift process, the clutch is separated, and the power is interrupted. At this moment, due to the large resistance, the input shaft speed drops quickly. If the engine is still controlled according to the ideal engine speed, when the engine speed reaches the ideal engine speed, the input shaft speed may have already been lower than the ideal engine speed. In this case, the engine may produce an impact when the clutch is re-engaged, which may even cause the engine to stall. Based on this, the embodiment can also determine the engine compensation speed according to the vehicle driving condition, so as to realize true impact-free synchronization when the clutch is re-engaged.

[0065] Step S3, determining the engine target speed according to the ideal engine speed and the engine compensation speed.

[0066] In the embodiment, the sum of the ideal engine speed and the engine compensation speed can be used as the engine target speed, and the calculation formula is as follows:

[0067]

[0068] In the formula, n target represents the engine target speed, n compensation represents the engine compensation speed.

[0069] Step S4, in response to the engine speed reaching the engine target speed, controlling the gear position of the vehicle to the target gear position.

[0070] In the embodiment, after the engine target speed is determined, the engine speed can be gradually increased until the engine speed reaches the engine target speed, and then the clutch can be controlled to be engaged, and the gear position of the vehicle can be controlled to the target gear position.

[0071] The vehicle downshift control method provided by the embodiment determines the engine compensation speed according to the current vehicle driving condition on the basis of the ideal engine speed, and compensates the ideal engine speed. Then, the engine target speed for realizing the downshift operation is determined according to the engine compensation speed and the ideal engine speed, so that the downshift engine target speed is more reasonable, and the vehicle downshift is smooth and accurate, and the shift quality is improved.

[0072] In the embodiment, after the gear of the vehicle is operated to be empty, the current speed of the vehicle and the speed ratio of the target gear are further obtained. The control mode of the clutch is controlled by the duty cycle. If the clutch is controlled to be quickly separated, 100% duty cycle is adopted. If the clutch is controlled to be slowly separated, relatively small duty cycle is adopted, such as 20% duty cycle or 30% duty cycle. The control mode of the clutch controlled by the duty cycle is closed loop control, which can dynamically adjust the duty cycle by detecting the current clutch position value. In the embodiment, the first duty cycle is relatively large, for example, 100% duty cycle, which is used to control the clutch to be quickly separated. The second duty cycle is relatively small, for example, 20% duty cycle or 30% duty cycle, which is used to control the clutch to be slowly separated. Based on this, the implementation mode of the gear of the vehicle being operated to be empty is as follows.

[0073] The separation stage of the clutch of the vehicle is determined, and the clutch is controlled to be separated according to the duty cycle corresponding to the separation stage.

[0074] The separation stage of the clutch of the vehicle is determined, and the clutch is controlled to be separated according to the duty cycle corresponding to the separation stage.

[0075] Further, the first duty cycle corresponding to the first separation stage is determined, and the clutch is controlled to be separated based on the first duty cycle. In response to the clutch being separated to the first friction point position, the second duty cycle corresponding to the second separation stage is determined. The clutch is controlled to be separated from the first friction point position according to the second duty cycle until the clutch is separated from the first friction point position to the second friction point position. The clutch is controlled based on the first duty cycle until the clutch is separated.

[0076] It should be noted that, in general, the stroke and the position of the friction point of different clutches are not the same. For each clutch and the vehicle model applied, the position of the friction point can be calibrated according to the test. For example, when the clutch is separated, the input shaft speed will show a downward trend when the clutch is separated to the friction point. As the clutch is gradually separated to the separation point position, the input shaft speed will gradually decrease to 0. The clutch position at the point where the input shaft speed decreases can be considered as the friction point position.

[0077] Further, the clutch friction point position is the first friction point position P1 in the embodiment, and the second friction point position P2 is a preset position, which can be calibrated through tests for different vehicle models. For example, the stroke of the clutch is 0-18mm, and the position of the friction point can be 9mm, P1 is the position of 9mm, and P2 can be the position of 10mm, that is, the position from the friction point to the position after the friction point.

[0078] After the clutch is separated from the first friction point position to the second friction point position, the clutch is controlled by the first duty ratio until the separation of the clutch is completed, and the gear of the vehicle is operated to be empty.

[0079] In the embodiment, the engine compensation speed is calculated as follows.

[0080] The current driving condition of the vehicle is obtained, and the sliding resistance of the vehicle is determined according to the driving road condition. Based on the sliding resistance and the vehicle speed, the engine slope compensation speed and the engine acceleration compensation speed of the vehicle are determined. According to the engine slope compensation speed and the engine acceleration compensation speed, the engine compensation speed is determined.

[0081] The engine slope compensation speed is used to prevent the input shaft speed from being synchronized with the engine speed, and the engine acceleration compensation speed is used to compensate for the change of the engine speed caused by the acceleration.

[0082] Further, the sum of the engine slope compensation speed and the engine acceleration compensation speed can be used as the engine compensation speed, and the calculation formula is as follows:

[0083]

[0084] In the formula, the engine slope compensation speed, the engine acceleration compensation speed.

[0085] The engine slope compensation speed includes positive compensation and negative compensation. If the vehicle is currently in an uphill state, the engine slope compensation speed is determined to be positive compensation. If the vehicle is currently in a downhill state, the engine slope compensation speed is determined to be negative compensation.

[0086] In the embodiment, the engine slope compensation speed is the product of the first compensation coefficient, the mass of the vehicle, and the sine value of the road slope. The compensation coefficient can reflect the influence of the slope on the speed and is calibrated through real vehicle tests. The calculation formula of the engine slope compensation speed is as follows:

[0087]

[0088] In the formula, is a first compensation coefficient, m represents the mass of the vehicle, is the road slope.

[0089] Specifically, if the current vehicle is on an uphill (i.e., θ>0), is a positive compensation, the engine target speed will be pulled up to a speed higher than the engine ideal speed, preventing the input shaft speed from rapidly decreasing due to sliding resistance. If the current vehicle is on a downhill (i.e., θ<0), is a negative compensation, the engine target speed will be pulled down to a speed lower than the engine ideal speed, waiting for the input shaft speed to slowly decrease due to inertia.

[0090] In this embodiment, the engine acceleration compensation speed is determined according to a second compensation coefficient and the integral of the vehicle speed and time. The second compensation coefficient is calibrated by real vehicle testing and is used to adjust the weight of this compensation. The calculation formula of the engine acceleration compensation speed is as follows:

[0091]

[0092] In the formula, is a second compensation coefficient, and t represents time.

[0093] In this embodiment, after determining the engine target speed, the engine speed is controlled to rise to the engine target speed , the target gear is engaged, and the clutch is precisely controlled.

[0094] The clutch engagement includes a fast approach stage, a slip film control stage, and a locking stage.

[0095] Further, in the fast approach stage, the clutch is controlled to engage based on a first duty ratio, and in response to the clutch engaging to the third friction point position, the clutch is about to transmit torque and enters the slip film control stage. In the slip film control stage, the clutch is controlled to engage according to a pre-calibrated torque control slope and a second duty ratio, until the clutch enters the locking stage. In the locking stage, the clutch is controlled to engage based on the first duty ratio until the clutch engagement is completed. The power is fully transmitted, the clutch is prevented from overheating due to long-time slip, and the engine torque is restored to the driver's demand torque.

[0096] The torque control slope is determined according to the throttle opening, the transmission speed, the throttle pedal, the driving resistance, and the clutch temperature, and the engine torque is smoothly transmitted by controlling the clutch slip.

[0097] Figure 2 is a flowchart of the downshift control method provided by one specific embodiment of the present application. As Figure 2As shown, the embodiment controls the separation of the clutch to perform the emptying operation, and acquires the current vehicle speed and the speed ratio of the target gear to calculate the engine ideal speed. The engine compensation speed can also be determined by the acquired current vehicle driving condition, so as to determine the engine target speed according to the engine ideal speed and the engine compensation speed. Further, the engine rotation is controlled to adjust to the engine target speed, the target gear is engaged, and the clutch is combined.

[0098] Figure 3 is a structural diagram of a vehicle downshift control device provided by one or more embodiments of the present application.

[0099] As shown Figure 3 The vehicle downshift control device includes a data acquisition module, a compensation speed determination module, a target speed determination module, and a downshift control module.

[0100] The data acquisition module is configured to determine the target gear of the vehicle downshift according to the current vehicle driving condition of the vehicle, and acquire the current vehicle speed and the speed ratio of the target gear.

[0101] The compensation speed determination module is configured to calculate the engine ideal speed according to the vehicle speed and the speed ratio, and determine the engine compensation speed according to the vehicle driving condition.

[0102] The target speed determination module is configured to determine the engine target speed according to the engine ideal speed and the engine compensation speed.

[0103] The downshift control module is configured to control the gear of the vehicle to the target gear in response to the engine speed reaching the engine target speed.

[0104] The data acquisition module is configured to determine the separation stage of the clutch of the vehicle, and control the separation of the clutch according to the duty cycle corresponding to the separation stage; in response to the completion of the separation of the clutch, perform the emptying operation on the gear of the vehicle, and acquire the current vehicle speed and the speed ratio of the target gear. Determine the first duty cycle corresponding to the first separation stage, and control the separation of the clutch based on the first duty cycle; in response to the separation of the clutch to the first friction point position, determine the second duty cycle corresponding to the second separation stage; control the separation of the clutch from the first friction point position to the second friction point position according to the second duty cycle; control the clutch based on the first duty cycle until the separation of the clutch is completed.

[0105] The compensation rotating speed determination module is configured to acquire a current driving condition of the vehicle, and determine a sliding resistance of the vehicle according to the driving condition; determine an engine slope compensation rotating speed and an engine acceleration compensation rotating speed of the vehicle based on the sliding resistance and a vehicle speed; and determine an engine compensation rotating speed according to the engine slope compensation rotating speed and the engine acceleration compensation rotating speed. In response to the vehicle being currently in an uphill state, the engine slope compensation rotating speed is determined as positive compensation; or, in response to the vehicle being currently in a downhill state, the engine slope compensation rotating speed is determined as negative compensation.

[0106] The downshift control module is configured to control the clutch of the vehicle to be engaged based on the first duty ratio; in response to the clutch being engaged to the third friction point position, control the clutch to be engaged according to the pre-calibrated torque control slope and the second duty ratio until the clutch enters a lockup stage; and control the clutch to be engaged based on the first duty ratio until the clutch is engaged completely.

[0107] Figure 4 is an electronic device structure block diagram of a vehicle downshift control method provided by one or more embodiments of the application.

[0108] As shown in Figure 4 , the application provides an electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

[0109] The memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of a vehicle downshift control method.

[0110] The application also provides a computer readable storage medium storing a computer program executable by an electronic device, and when the computer program runs on the electronic device, the electronic device executes the steps of a vehicle downshift control method.

[0111] The application also provides a vehicle, comprising:

[0112] The electronic device is used to implement the steps of a vehicle downshift control method.

[0113] The processor runs a program, and when the program runs, the data output from the electronic device executes the steps of a vehicle downshift control method.

[0114] The storage medium is used to store a program, and when the program runs, the data output from the electronic device executes the steps of a vehicle downshift control method.

[0115] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus can be divided into an address bus, a data bus, a control bus, and the like. For the convenience of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0116] The electronic device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running on the operating system. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory. The operating system can be any one or more computer operating systems that implement control of the electronic device through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. In embodiments of the present application, the electronic device can be a handheld device such as a smartphone or a tablet computer, or an electronic device such as a desktop computer or a portable computer, and is not particularly limited in embodiments of the present application.

[0117] The execution subject of the electronic device control in embodiments of the present application can be the electronic device, or a functional module capable of calling and executing a program in the electronic device. The electronic device can obtain a firmware corresponding to the storage medium, and the firmware corresponding to the storage medium is provided by a vendor. The firmware corresponding to different storage media can be the same or different, and is not limited herein. After the electronic device obtains the firmware corresponding to the storage medium, the electronic device can write the firmware corresponding to the storage medium into the storage medium, specifically, burn the firmware corresponding to the storage medium into the storage medium. The process of burning the firmware into the storage medium can be implemented by using existing technology, and is not described in detail in embodiments of the present application.

[0118] The electronic device can also obtain a reset command corresponding to the storage medium, and the reset command corresponding to the storage medium is provided by a vendor. The reset command corresponding to different storage media can be the same or different, and is not limited herein.

[0119] At this time, the storage medium of the electronic device is a storage medium in which the corresponding firmware is written, and the electronic device can respond to the reset command corresponding to the storage medium in the storage medium in which the corresponding firmware is written, so that the electronic device resets the storage medium in which the corresponding firmware is written according to the reset command corresponding to the storage medium. The process of resetting the storage medium according to the reset command can be implemented by using existing technology, and is not described in detail in embodiments of the present application.

[0120] For the convenience of description, the above apparatus is described in various units, modules, and the like in terms of functions. Of course, the functions of the units and modules can be implemented in one or more software and / or hardware in implementing the present application.

[0121] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless specifically defined.

[0122] For the convenience of description, the above apparatus is described in various units, modules, and the like in terms of functions. Of course, the functions of the units and modules can be implemented in one or more software and / or hardware in implementing the present application.

[0123] From the above description of the embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software and the necessary universal hardware platform. Based on such an understanding, the technical solutions of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments of the present application.

[0124] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle kick-down control method characterized by comprising: The vehicle downshift control method comprises: According to the current vehicle driving condition of the vehicle, the target gear of the vehicle downshift is determined, and the current vehicle speed of the vehicle and the speed ratio of the target gear are obtained; According to the vehicle speed and the speed ratio, the ideal engine speed is calculated, and the engine compensation speed is determined according to the vehicle driving condition; According to the ideal engine speed and the engine compensation speed, the target engine speed is determined; In response to the engine speed reaching the target engine speed, the gear of the vehicle is controlled to the target gear.

2. The vehicle kick-down control method according to claim 1, characterized by, The current vehicle speed of the vehicle and the speed ratio of the target gear are obtained, comprising: Determine the separation stage of the vehicle clutch, and control the clutch to separate according to the duty cycle corresponding to the separation stage; In response to the completion of the separation of the clutch, the gear of the vehicle is operated to the empty gear, and the current vehicle speed of the vehicle and the speed ratio of the target gear are obtained.

3. The vehicle kick-down control method according to claim 2, characterized by, According to the duty cycle corresponding to the separation stage, the clutch is controlled to separate, comprising: Determine the first duty cycle corresponding to the first separation stage, and control the clutch to separate based on the first duty cycle; In response to the separation of the clutch to the first friction point position, the second duty cycle corresponding to the second separation stage is determined; According to the second duty cycle, the clutch is controlled to separate from the first friction point position until the clutch is separated from the first friction point position to the second friction point position; Based on the first duty cycle, the clutch is controlled until the clutch completes the separation.

4. The vehicle kick-down control method according to claim 1, characterized by, According to the vehicle driving condition, the engine compensation speed is determined, comprising: Obtain the current driving condition of the vehicle, and determine the sliding resistance of the vehicle according to the driving condition; Based on the sliding resistance and the vehicle speed, the current engine slope compensation speed and the engine acceleration compensation speed of the vehicle are determined; According to the engine slope compensation speed and the engine acceleration compensation speed, the engine compensation speed is determined.

5. The vehicle kick-down control method according to claim 4, characterized by, The determination of the current engine slope compensation speed of the vehicle comprises: In response to the current vehicle being in uphill state, the engine slope compensation speed is determined as positive compensation; Or In response to the current vehicle being in downhill state, the engine slope compensation speed is determined as negative compensation.

6. The vehicle kick-down control method according to claim 3, characterized by, The control of the gear of the vehicle to the target gear comprises: Based on the first duty cycle, the clutch of the vehicle is controlled to combine; In response to the combination of the clutch to the third friction point position, the clutch is controlled to combine according to the pre-calibrated torque control slope and the second duty cycle, until the clutch enters the locking stage; Based on the first duty cycle, the clutch is controlled to combine until the clutch completes the combination.

7. A vehicle kickdown control device characterized by comprising: The vehicle downshift control device comprises: A data acquisition module is used to determine the target gear of the vehicle downshift according to the current vehicle driving condition of the vehicle, and to obtain the current vehicle speed of the vehicle and the speed ratio of the target gear; A compensation speed determination module is used to calculate the ideal engine speed according to the vehicle speed and the speed ratio, and to determine the engine compensation speed according to the vehicle driving condition; The target speed determination module is configured to determine an engine target speed based on the engine ideal speed and the engine compensation speed. The downshift control module is configured to control a gear of the vehicle to the target gear in response to the engine speed reaching the engine target speed.

8. An electronic device, comprising: The vehicle downshift control method comprises the following steps: The vehicle downshift control method comprises the following steps: The vehicle downshift control method comprises the following steps:

9. A computer-readable storage medium, characterized in that, The vehicle downshift control method comprises the following steps:

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