Vehicle power distribution method, device, vehicle and storage medium

Abstract

The present application provides a method, device, vehicle and storage medium for vehicle power distribution. The method includes: obtaining the torque distribution ratio, speed ratio and electromechanical conversion efficiency ratio of the front axle drive motor and the rear axle drive motor of the vehicle, and determining the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, speed ratio and electromechanical conversion efficiency ratio; when the feedback adjustment flag is in position, obtaining the actual torque ratio of the front axle drive motor and the rear axle drive motor, and determining the adjustment value according to the actual torque ratio and the torque distribution ratio; determining the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value and the adjustment value of the power distribution ratio. The present application can determine a suitable power distribution ratio for the front and rear axle drive motors and improve the driving performance of the whole vehicle.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a method, device, vehicle and storage medium for vehicle power distribution. Background Art

[0002] At present, the power distribution method of multi-motor hybrid vehicles is generally priority power distribution, that is, different priorities are set for different motors. Generally, the priority of the front axle drive motor is higher than that of the rear axle drive motor, and different powers are allocated to the motors according to their priorities.

[0003] When the battery discharge power of a multi-motor hybrid vehicle is low and the vehicle drive demand is large, the battery discharge power cannot meet the torque requests of the front and rear axles of the vehicle at the same time. Since the motor torque limit is mainly determined by the power limit, the priority power distribution method will cause the front axle torque limit to be too large, causing the torque distribution of the front and rear axles to deviate significantly from the established torque distribution, affecting the vehicle's driving performance. Summary of the invention

[0004] The present application provides a method, device, vehicle and storage medium for vehicle power distribution to solve the problem in the prior art that priority power distribution will reduce the vehicle's driving performance in extreme cases such as when the battery discharge power is low and the vehicle driving demand is large.

[0005] In a first aspect, the present application provides a method for distributing vehicle power, comprising:

[0006] Obtaining a torque distribution ratio, a speed ratio, and an electromechanical conversion efficiency ratio of a front axle drive motor and a rear axle drive motor of a vehicle, and determining an initial value of a power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio, and the electromechanical conversion efficiency ratio;

[0007] When the feedback adjustment flag is in position, obtaining the actual torque ratio of the front axle drive motor and the rear axle drive motor, and determining the adjustment value according to the actual torque ratio and the torque distribution ratio;

[0008] The power distribution ratio of the front axle drive motor and the rear axle drive motor is determined according to the initial value of the power distribution ratio and the adjustment value.

[0009] In a possible implementation, the method further includes:

[0010] When the feedback adjustment flag is cleared, the initial value of the power distribution ratio is determined to be the power distribution ratio of the front axle drive motor and the rear axle drive motor.

[0011] In a possible implementation, after determining the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio and the actual efficiency ratio, the method further includes:

[0012] According to the power allocation ratio initial value, determining a corresponding target power allocation ratio initial value based on a preset power allocation ratio level;

[0013] Determining the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value of the power distribution ratio and the adjustment value includes:

[0014] The power distribution ratio of the front axle drive motor and the rear axle drive motor is determined according to the initial value of the target power distribution ratio and the adjustment value.

[0015] In a possible implementation, the method for controlling the feedback adjustment flag includes:

[0016] Acquiring a power request value of the driving motor and a driving mode of the vehicle;

[0017] When the actual torque ratio, the power request value of the drive motor, and the driving mode of the vehicle all meet preset conditions, setting the feedback adjustment flag;

[0018] When any parameter among the actual torque ratio, the power request value of the drive motor and the driving mode of the vehicle does not meet the preset conditions, the feedback adjustment flag is cleared or maintained in the cleared state.

[0019] In a possible implementation, the power request value of the drive motor includes: a power request value of the front axle drive motor and / or a power request value of the rear axle drive motor;

[0020] When the actual torque ratio, the power request value of the drive motor, and the driving mode of the vehicle all meet the preset conditions, setting the feedback adjustment flag, including:

[0021] When the difference between the actual torque ratio and the torque distribution ratio is greater than a preset threshold and lasts for a preset time, outputting first activation information;

[0022] When the power request value of the front axle drive motor is equal to the power limit value of the front axle drive motor, and / or the power request value of the rear axle drive motor is equal to the power limit value of the rear axle drive motor, outputting second activation information;

[0023] When the driving mode of the vehicle is the direct drive mode, outputting third activation information;

[0024] When the first activation information, the second activation information and the third activation information are all received, the feedback adjustment flag is set.

[0025] In a possible implementation, when any parameter of the actual torque ratio, the power request value of the drive motor, and the driving mode of the vehicle does not meet a preset condition, clearing the feedback adjustment flag or maintaining the cleared state of the feedback adjustment flag includes:

[0026] When the first activation information, the second activation information, and the third activation information are not all received, the feedback adjustment flag is cleared or maintained in a cleared state.

[0027] In a possible implementation, determining the adjustment value according to the actual torque ratio and the torque distribution ratio includes:

[0028] calculating a difference between the actual torque ratio and the torque distribution ratio;

[0029] According to the difference, a preset chart is searched to determine a corresponding adjustment value, wherein the preset chart includes a corresponding relationship between the difference and the adjustment value.

[0030] In a second aspect, the present application provides a vehicle power distribution device, comprising:

[0031] An acquisition module, used to acquire a torque distribution ratio, a speed ratio, and an electromechanical conversion efficiency ratio of a front axle drive motor and a rear axle drive motor of a vehicle;

[0032] a calculation module, configured to determine an initial value of a power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio and the electromechanical conversion efficiency ratio;

[0033] The acquisition module is further used to acquire the actual torque ratio of the front axle drive motor and the rear axle drive motor when the feedback adjustment flag is in position;

[0034] The calculation module is further used to determine the adjustment value according to the actual torque ratio and the torque distribution ratio;

[0035] The calculation module is further used to determine the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value of the power distribution ratio and the adjustment value.

[0036] In a third aspect, the present application provides a vehicle, the vehicle includes an electronic device, the electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, it implements the steps of the vehicle power distribution method as described in the first aspect or any possible implementation method of the first aspect.

[0037] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the vehicle power distribution method described in the first aspect or any possible implementation method of the first aspect.

[0038] The embodiments of the present application provide a method, device, vehicle and storage medium for vehicle power distribution. An initial value of the power distribution ratio is obtained by calculation. When a feedback adjustment flag is in position, an adjustment value is determined according to the actual torque ratio and the torque distribution ratio. The power distribution ratio of the front axle drive motor and the rear axle drive motor is determined according to the initial value of the power distribution ratio and the adjustment value, so that a suitable power distribution ratio can be determined for the front and rear axle drive motors, thereby improving the driving performance of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 is a flow chart of the implementation of the vehicle power distribution method provided in the embodiment of the present application;

[0041] Figure 2 It is a vehicle power architecture diagram of the direct drive mode provided in an embodiment of the present application;

[0042] Figure 3 It is a structural schematic diagram of a vehicle power distribution device provided in an embodiment of the present application;

[0043] Figure 4 It is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0045] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0046] Figure 1 A flow chart of a method for distributing vehicle power provided in an embodiment of the present application is described in detail as follows:

[0047] Step 101, obtaining the torque distribution ratio, speed ratio and electromechanical conversion efficiency ratio of the front axle drive motor and the rear axle drive motor of the vehicle, and determining the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, speed ratio and electromechanical conversion efficiency ratio.

[0048] In one embodiment, the torque distribution ratio of the front axle drive motor and the rear axle drive motor can be obtained through the vehicle controller. The speed ratio is the ratio of the speed of the front axle drive motor to the speed of the rear axle drive motor, and the speed of the front axle drive motor and the speed of the rear axle drive motor can be obtained through the vehicle controller. The electromechanical conversion efficiency ratio is the ratio of the conversion efficiency of the mechanical energy to the electrical energy of the front axle drive motor to the conversion efficiency of the mechanical energy to the electrical energy of the rear axle drive motor. The conversion efficiency of the mechanical energy to the electrical energy of the front axle drive motor and the conversion efficiency of the mechanical energy to the electrical energy of the rear axle drive motor can be obtained through the vehicle controller.

[0049] In one embodiment, determining the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor based on the torque distribution ratio, the speed ratio and the electromechanical conversion efficiency ratio may include: obtaining the mechanical power distribution ratio of the front axle drive motor and the rear axle drive motor based on the product of the torque distribution ratio and the speed ratio; obtaining the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor based on the quotient of the mechanical power distribution ratio and the electromechanical conversion efficiency ratio.

[0050] The initial value of the power distribution ratio here can also be understood as the electric power distribution ratio, that is, the quotient of the mechanical power distribution ratio and the electromechanical conversion efficiency ratio is the electric power distribution ratio.

[0051] Since the calculation of the initial value of the power distribution ratio will be affected by the current torque distribution ratio, speed ratio and electromechanical conversion efficiency ratio, the power distribution ratio may jump. In order to prevent the power distribution ratio from jumping and causing the motor torque to jump, resulting in poor vehicle drivability, the power distribution ratio can be divided into levels from 1 to 100% to obtain multiple groups of power distribution ratios. The initial value of the power distribution ratio calculated in this way corresponds to the divided level, which can reduce the power distribution ratio jump. When dividing the levels, the power distribution ratio can be divided into 11 levels according to size, namely 0%, 10%, 20%...90%, 100%, and each level jumps according to the gradient to form a relatively smooth state, so that the power distribution ratio will not jump. For example, if the calculated initial value of the power distribution ratio is 9%, then after the power distribution ratio level mapping, the target power distribution ratio initial value is 10%. For example, if the calculated initial value of the power allocation ratio is 14%, then after the power allocation ratio level mapping, the target initial value of the power allocation ratio is 10%. In this way, even if the initial value of the power allocation ratio is 9% or 14%, the target initial value of the power allocation ratio is 10% after the power allocation ratio level processing, thereby reducing the power allocation ratio jump.

[0052] In one embodiment, according to the initial power allocation ratio value, the corresponding target initial power allocation ratio value is determined based on the preset power allocation ratio level. Here, the power allocation ratio corresponding to the level closest to the initial power allocation ratio value is determined as the target initial power allocation ratio value.

[0053] Step 102, when the feedback adjustment flag is in position, the actual torque ratio of the front axle drive motor and the rear axle drive motor is obtained, and the adjustment value is determined according to the actual torque ratio and the torque distribution ratio.

[0054] The feedback adjustment flag is used to indicate whether the power allocation feedback adjustment mechanism is activated. When the feedback adjustment flag is set, it indicates that the power allocation feedback adjustment mechanism is activated. When the feedback adjustment flag is cleared, it indicates that the power allocation feedback adjustment mechanism is not activated.

[0055] The power allocation feedback adjustment mechanism is a method of using an adjustment value to adjust the initial value of the power allocation ratio calculated in step 101. For details, refer to the description of step 103.

[0056] The situations in which the power distribution feedback adjustment mechanism is activated may include: when the difference between the actual torque ratio and the torque distribution ratio is greater than a preset threshold and lasts for a preset time; when the power request value of the front axle drive motor is equal to the power limit value of the front axle drive motor, and / or the power request value of the rear axle drive motor is equal to the power limit value of the rear axle drive motor; when the vehicle's driving mode is direct drive mode.

[0057] In one embodiment, the control method of the feedback adjustment flag may include:

[0058] Acquire a power request value of the drive motor and a driving mode of the vehicle; the power request value of the drive motor includes: a power request value of the front axle drive motor and / or a power request value of the rear axle drive motor;

[0059] When the actual torque ratio, the power request value of the drive motor and the driving mode of the vehicle all meet the preset conditions, the feedback adjustment flag is set;

[0060] The actual torque ratio, the power request value of the drive motor and the driving mode of the vehicle all meet the preset conditions means that the actual torque ratio, the power request value of the drive motor and the driving mode of the vehicle all meet the preset conditions, or the actual torque ratio, the power request value of the rear axle drive motor and the driving mode of the vehicle all meet the preset conditions, or the actual torque ratio, the power request value of the front axle drive motor, the power request value of the rear axle drive motor and the driving mode of the vehicle all meet the preset conditions.

[0061] When the actual torque ratio, the power request value of the front axle drive motor and / or the power request value of the rear axle drive motor, and any parameter in the driving mode of the vehicle do not meet the preset conditions, the feedback adjustment flag is cleared or the feedback adjustment flag is maintained in a cleared state. Here, the actual torque ratio, the power request value of the drive motor, and any parameter in the driving mode of the vehicle do not meet the preset conditions, which means that the actual torque ratio, the power request value of the front axle drive motor, and any parameter in the driving mode of the vehicle do not meet the conditions, or the actual torque ratio, the power request value of the rear axle drive motor, and any parameter in the driving mode of the vehicle do not meet the preset conditions, or the actual torque ratio, the power request value of the front axle drive motor, the power request value of the rear axle drive motor, and any parameter in the driving mode of the vehicle do not meet the preset conditions.

[0062] Here, the power request value of the front axle drive motor and the power request value of the rear axle drive motor can be obtained through the vehicle controller.

[0063] The vehicle's driving modes can include direct drive mode, series mode and EV mode. In direct drive mode, the engine and the drive motor drive the vehicle at the same time, with greater power; in series mode, the engine does not directly drive the drive motor to rotate to make the vehicle move, but drives the generator to generate electricity and power the drive motor, and the drive motor drives the vehicle. EV mode is a pure electric mode, and the drive motor works alone to drive the vehicle.

[0064] When the vehicle's driving mode is direct drive mode, it can be used as one of the conditions for setting the feedback adjustment flag. Figure 2, because the engine, drive motor and generator in the direct drive mode are turned on at the same time, the engine and drive motor output torque to drive the vehicle at the same time, and the front axle torque is borne by the front axle drive motor and the engine. The front axle drive motor and the engine coordinate the torque through load point transfer. There is no fixed torque distribution ratio between the front axle drive motor and the engine, which makes it impossible to accurately determine the torque of the front axle drive motor, resulting in a deviation between the torque distribution ratio of the front axle drive motor and the rear axle drive motor and the actual torque distribution ratio, which cannot be used to calculate the power distribution ratio. When the power distribution ratio is calculated using the torque distribution ratio of the front axle drive motor and the rear axle drive motor, a feedback adjustment mechanism is required for adjustment. In the series mode and EV mode, the engine does not directly output torque to the vehicle, so the torque of the whole vehicle is distributed to the front axle drive motor and the rear axle drive motor according to the torque distribution ratio. Therefore, the power distribution ratio can be directly calculated based on the torque distribution ratio of the front axle drive motor and the rear axle drive motor, the electric conversion efficiency of the front axle drive motor and the rear axle drive motor, and the speed ratio, and does not need to be adjusted through the feedback adjustment mechanism.

[0065] In one embodiment, when the actual torque ratio, the power request value of the drive motor, and the driving mode of the vehicle all meet the preset conditions, setting the feedback adjustment flag may include:

[0066] When the difference between the actual torque ratio and the torque distribution ratio is greater than a preset threshold and lasts for a preset time, it is determined that the actual torque ratio meets the condition and a first activation information is output;

[0067] When the power request value of the front axle drive motor is equal to the power limit value of the front axle drive motor, and / or the power request value of the rear axle drive motor is equal to the power limit value of the rear axle drive motor, determining that the power request value of the front axle drive motor and / or the power request value of the rear axle drive motor meets the condition, and outputting second activation information;

[0068] When the driving mode of the vehicle is the direct drive mode, determining that the driving mode of the vehicle meets the condition, and outputting third activation information;

[0069] When the first activation information, the second activation information and the third activation information are all received, it indicates that the actual torque ratio, the power request value of the drive motor and the driving mode of the vehicle all meet the preset conditions, and the feedback adjustment flag is set.

[0070] It can be understood that when the difference between the actual torque ratio and the torque distribution ratio is less than or equal to the preset threshold, or when the difference between the actual torque ratio and the torque distribution ratio is greater than the preset threshold but the duration does not reach the preset time, it is determined that the actual torque ratio does not meet the condition;

[0071] When the power request value of the front axle drive motor is not equal to the power limit value of the front axle drive motor, or the power request value of the rear axle drive motor is not equal to the power limit value of the rear axle drive motor, it is determined that the power request value of the front axle drive motor or the power request value of the rear axle drive motor does not meet the condition;

[0072] When the driving mode of the vehicle is not the direct drive mode, determining that the driving mode of the vehicle does not meet the condition;

[0073] When all activation information is not received, the feedback adjustment flag is cleared or maintained in the cleared state, and the initial value of the power distribution ratio is determined to be the power distribution ratio of the front axle drive motor and the rear axle drive motor.

[0074] In one embodiment, when determining the adjustment value according to the actual torque ratio and the torque distribution ratio, the corresponding power can be determined according to the difference between the actual torque ratio and the torque distribution ratio, and the determined power can be used as the adjustment value to adjust the initial value of the power distribution ratio. Specifically, it can include: calculating the difference between the actual torque ratio and the torque distribution ratio; according to the difference, querying in a preset chart to determine the corresponding adjustment value, and the preset chart includes the corresponding relationship between the difference and the adjustment value. It should be noted that the adjustment value here is the power distribution ratio adjustment value, which is consistent with the value type of the initial value of the power distribution ratio.

[0075] It should be noted that the above-mentioned vehicle power distribution method is executed according to a preset cycle until the torque distribution of the front axle drive motor and the rear axle drive motor is normal, that is, the actual torque ratio and the distribution ratio of the front axle drive motor and the rear axle drive motor are the same. At this time, the calculated difference between the actual torque ratio and the torque distribution ratio is zero, and the corresponding adjustment value is zero. The current power distribution ratio is maintained and the power distribution process is terminated.

[0076] Step 103, determining the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value and the adjustment value of the power distribution ratio.

[0077] In one embodiment, when determining the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value of the power distribution ratio and the adjustment value, the adjustment value may be used to adjust the initial value of the power distribution ratio to obtain the adjusted power distribution ratio, and the adjusted power distribution ratio is the power distribution ratio of the front axle drive motor and the rear axle drive motor, which may specifically include:

[0078] The power distribution ratio of the front axle drive motor and the rear axle drive motor is determined based on the sum of the initial value and the adjustment value of the power distribution ratio.

[0079] After determining the power distribution ratio of the front axle drive motor and the rear axle drive motor, the power of the front axle drive motor and the rear axle drive motor are distributed according to the power distribution ratio. Through the power limits of the front axle drive motor and the rear axle drive motor, the power of the front axle drive motor is obtained to drive the front axle drive motor, and the power of the rear axle drive motor is obtained to drive the rear axle drive motor.

[0080] Here, the initial value of the power distribution ratio may also be the initial value of the target power distribution ratio, that is, the initial value of the power distribution ratio is converted into a preset power distribution ratio level. Then this step may also include: determining the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value of the target power distribution ratio and the adjustment value. In one embodiment, the power distribution ratio of the front axle drive motor and the rear axle drive motor is determined according to the sum of the initial value of the target power distribution ratio and the adjustment value.

[0081] The above-mentioned vehicle power distribution method determines the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio and the electromechanical conversion efficiency ratio, and determines whether to adjust the initial value of the power distribution ratio according to the actual state of the vehicle (the vehicle's driving mode, the actual torque ratio of the front and rear axle drive motors and the power request of the front and rear axle drive motors). When adjustment is required, the adjustment value is determined by looking up the table according to the difference between the actual torque ratio and the torque distribution ratio, and the adjustment value is added to the initial value of the power distribution ratio to obtain the power distribution ratio of the front axle drive motor and the rear axle drive motor, so that the appropriate power distribution ratio can be determined for the front and rear axle drive motors, thereby improving the driving performance of the whole vehicle.

[0082] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0083] The following is an embodiment of the device of the present application. For details not described in detail, please refer to the corresponding method embodiment described above.

[0084] Figure 3 The following is a schematic diagram of the structure of a vehicle power distribution device provided in an embodiment of the present application. For ease of explanation, only the parts related to the embodiment of the present application are shown, which are described in detail as follows:

[0085] like Figure 3 As shown, the vehicle power distribution device includes: an acquisition module 301 and a calculation module 302 .

[0086] An acquisition module 301 is used to acquire a torque distribution ratio, a speed ratio, and an electromechanical conversion efficiency ratio of a front axle drive motor and a rear axle drive motor of a vehicle;

[0087] A calculation module 302 is used to determine an initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio and the electromechanical conversion efficiency ratio;

[0088] The acquisition module 301 is further used to acquire the actual torque ratio of the front axle drive motor and the rear axle drive motor when the feedback adjustment flag is in position;

[0089] The calculation module 302 is further used to determine the adjustment value according to the actual torque ratio and the torque distribution ratio;

[0090] The calculation module 302 is further used to determine the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value and the adjustment value of the power distribution ratio.

[0091] In one embodiment, the calculation module 302 is further used to determine the initial value of the power distribution ratio as the power distribution ratio of the front axle drive motor and the rear axle drive motor when the feedback adjustment flag is cleared.

[0092] In one embodiment, the calculation module 302 is further configured to determine a corresponding target power distribution ratio initial value based on the power distribution ratio initial value and a preset power distribution ratio level, and to determine the power distribution ratio of the front axle drive motor and the rear axle drive motor based on the target power distribution ratio initial value and the adjustment value.

[0093] In one embodiment, the calculation module 302 determines the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio and the electromechanical conversion efficiency ratio, and is used to:

[0094] The mechanical power distribution ratio of the front axle drive motor and the rear axle drive motor is obtained according to the product of the torque distribution ratio and the speed ratio;

[0095] According to the quotient of the mechanical power distribution ratio and the electromechanical conversion efficiency ratio, the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor is obtained.

[0096] In one embodiment, when the calculation module 302 controls the feedback adjustment flag, it can be used to:

[0097] Obtaining a power request value of a driving motor and a driving mode of a vehicle;

[0098] When the actual torque ratio, the power request value of the drive motor and the driving mode of the vehicle all meet the preset conditions, the feedback adjustment flag is set;

[0099] When any parameter among the actual torque ratio, the power request value of the drive motor and the driving mode of the vehicle does not meet the preset conditions, the feedback adjustment flag is cleared or the feedback adjustment flag is maintained in the cleared state.

[0100] In one embodiment, the power request value of the drive motor includes: a power request value of the front axle drive motor and / or a power request value of the rear axle drive motor;

[0101] The calculation module 302 is further used for:

[0102] When the difference between the actual torque ratio and the torque distribution ratio is greater than a preset threshold and lasts for a preset time, outputting first activation information;

[0103] When the power request value of the front axle drive motor is equal to the power limit value of the front axle drive motor, and / or the power request value of the rear axle drive motor is equal to the power limit value of the rear axle drive motor, outputting second activation information;

[0104] When the driving mode of the vehicle is the direct drive mode, outputting third activation information;

[0105] When the first activation information, the second activation information and the third activation information are all received, the feedback adjustment flag is set.

[0106] In one embodiment, the calculation module 302 is further configured to: when the first activation information, the second activation information, and the third activation information are not all received, clear the feedback adjustment flag or maintain the feedback adjustment flag in a cleared state.

[0107] In one embodiment, when the calculation module 302 determines the adjustment value according to the actual torque ratio and the torque distribution ratio, it can be used to:

[0108] Calculate the difference between the actual torque ratio and the torque distribution ratio;

[0109] According to the difference, the corresponding adjustment value is determined by searching in a preset chart, and the preset chart includes the corresponding relationship between the difference and the adjustment value.

[0110] In one embodiment, when the calculation module 302 determines the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value and the adjustment value of the power distribution ratio, it can be used to:

[0111] The power distribution ratio of the front axle drive motor and the rear axle drive motor is determined based on the sum of the initial value and the adjustment value of the power distribution ratio.

[0112] The above-mentioned vehicle power distribution device determines the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio and the electromechanical conversion efficiency ratio by the calculation module, and determines whether to adjust the initial value of the power distribution ratio according to the actual state of the vehicle (the vehicle's driving mode, the actual torque ratio of the front and rear axle drive motors and the power request of the front and rear axle drive motors). When adjustment is required, the calculation module determines the adjustment value by looking up the table according to the difference between the actual torque ratio and the torque distribution ratio, and adds the adjustment value to the initial value of the power distribution ratio to obtain the power distribution ratio of the front axle drive motor and the rear axle drive motor, so that the appropriate power distribution ratio can be determined for the front and rear axle drive motors, thereby improving the driving performance of the whole vehicle.

[0113] The present application also provides a computer program product having a program code, which executes the steps of any of the above-mentioned vehicle power distribution method embodiments when the program code is run in a corresponding processor, controller, computing device or terminal, such as Figure 1 Steps 101 to 103 shown. Those skilled in the art will appreciate that the method and the device of the embodiment of the present application can be implemented in various forms of hardware, software, firmware, a dedicated processor or a combination thereof. The dedicated processor may include an application specific integrated circuit (ASIC), a reduced instruction set computer (RISC) and / or a field programmable gate array (FPGA). The proposed method and device are preferably implemented as a combination of hardware and software. The software is preferably installed on a program storage device as an application. It is typically based on a machine with a computer platform having hardware, such as one or more central processing units (CPUs), random access memories (RAMs) and one or more input / output (I / O) interfaces. An operating system is typically also installed on the computer platform. The various processes and functions described here may be part of an application, or a part thereof may be executed by an operating system.

[0114] The present application embodiment provides a vehicle, the vehicle comprising Figure 4 The electronic equipment shown. Figure 4 As shown, the electronic device 4 of this embodiment includes: a processor 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. When the processor 40 executes the computer program 42, the steps in the above-mentioned vehicle power distribution method embodiments are implemented, such as Figure 1 Alternatively, when the processor 40 executes the computer program 42, the functions of each module / unit in the above-mentioned device embodiments are realized, for example, Figure 3 Functionality of modules / units 301 to 302 shown.

[0115] Exemplarily, the computer program 42 may be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to complete / implement the solution provided by the present application. The one or more modules / units may be a series of computer program instruction segments that can complete specific functions, and the instruction segments are used to describe the execution process of the computer program 42 in the electronic device 4. For example, the computer program 42 may be divided into Figure 3 Functionality of modules / units 301 to 302 shown.

[0116] The electronic device 4 may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will appreciate that Figure 4 It is only an example of the electronic device 4 and does not constitute a limitation of the electronic device 4. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0117] The processor 40 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0118] The memory 41 may be an internal storage unit of the electronic device 4, such as a hard disk or memory of the electronic device 4. The memory 41 may also be an external storage device of the electronic device 4, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the electronic device 4. The memory 41 is used to store the computer program and other programs and data required by the electronic device. The memory 41 may also be used to temporarily store data that has been output or is to be output.

[0119] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0120] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0121] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0122] In the embodiments provided in the present application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0123] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0124] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0125] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned vehicle power distribution method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0126] In addition, the features of the embodiments shown in the drawings of the present application or the various embodiments mentioned in this specification are not necessarily understood as independent embodiments. Instead, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the drawings.

[0127] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for distributing vehicle power, characterized in that: include: Obtaining a torque distribution ratio, a speed ratio, and an electromechanical conversion efficiency ratio of a front axle drive motor and a rear axle drive motor of a vehicle, and determining an initial value of a power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio, and the electromechanical conversion efficiency ratio; When the feedback adjustment flag is in position, obtaining the actual torque ratio of the front axle drive motor and the rear axle drive motor, and determining the adjustment value according to the actual torque ratio and the torque distribution ratio; Determining the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value of the power distribution ratio and the adjustment value; The control method of the feedback adjustment flag comprises: Acquire a power request value of the drive motor and a driving mode of the vehicle; wherein the power request value of the drive motor includes: a power request value of the front axle drive motor and / or a power request value of the rear axle drive motor; When the actual torque ratio, the power request value of the drive motor, and the driving mode of the vehicle all meet preset conditions, setting the feedback adjustment flag; When the actual torque ratio, the power request value of the drive motor, and the driving mode of the vehicle all meet the preset conditions, setting the feedback adjustment flag includes: When the difference between the actual torque ratio and the torque distribution ratio is greater than a preset threshold and lasts for a preset time, outputting first activation information; When the power request value of the front axle drive motor is equal to the power limit value of the front axle drive motor, and / or the power request value of the rear axle drive motor is equal to the power limit value of the rear axle drive motor, outputting second activation information; When the driving mode of the vehicle is the direct drive mode, outputting third activation information; When the first activation information, the second activation information and the third activation information are all received, the feedback adjustment flag is set.

2. The vehicle power distribution method according to claim 1, characterized in that: Also includes: When the feedback adjustment flag is cleared, the initial value of the power distribution ratio is determined to be the power distribution ratio of the front axle drive motor and the rear axle drive motor.

3. The vehicle power distribution method according to claim 1, characterized in that: After determining the initial value of the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio and the electromechanical conversion efficiency ratio, the method further includes: According to the power allocation ratio initial value, determining a corresponding target power allocation ratio initial value based on a preset power allocation ratio level; Determining the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value of the power distribution ratio and the adjustment value includes: The power distribution ratio of the front axle drive motor and the rear axle drive motor is determined according to the initial value of the target power distribution ratio and the adjustment value.

4. The method for distributing vehicle power according to any one of claims 1 to 3, characterized in that: The control method of the feedback adjustment flag bit also includes: When any parameter among the actual torque ratio, the power request value of the drive motor and the driving mode of the vehicle does not meet the preset conditions, the feedback adjustment flag is cleared or maintained in the cleared state.

5. The vehicle power distribution method according to claim 4, characterized in that: When any parameter of the actual torque ratio, the power request value of the drive motor, and the driving mode of the vehicle does not meet the preset conditions, the feedback adjustment flag is cleared or maintained in the cleared state of the feedback adjustment flag, including: When the first activation information, the second activation information, and the third activation information are not all received, the feedback adjustment flag is cleared or maintained in a cleared state.

6. The vehicle power distribution method according to any one of claims 1 to 3, characterized in that: The step of determining the adjustment value according to the actual torque ratio and the torque distribution ratio comprises: calculating a difference between the actual torque ratio and the torque distribution ratio; According to the difference, a preset chart is searched to determine a corresponding adjustment value, wherein the preset chart includes a corresponding relationship between the difference and the adjustment value.

7. A vehicle power distribution device, characterized in that: include: An acquisition module, used to acquire a torque distribution ratio, a speed ratio, and an electromechanical conversion efficiency ratio of a front axle drive motor and a rear axle drive motor of a vehicle; a calculation module, configured to determine an initial value of a power distribution ratio of the front axle drive motor and the rear axle drive motor according to the torque distribution ratio, the speed ratio and the electromechanical conversion efficiency ratio; The acquisition module is further used to acquire the actual torque ratio of the front axle drive motor and the rear axle drive motor when the feedback adjustment flag is in position; The calculation module is further used to determine the adjustment value according to the actual torque ratio and the torque distribution ratio; The calculation module is further used to determine the power distribution ratio of the front axle drive motor and the rear axle drive motor according to the initial value of the power distribution ratio and the adjustment value; When the calculation module controls the feedback adjustment flag, it is used to: Acquire a power request value of the drive motor and a driving mode of the vehicle; wherein the power request value of the drive motor includes: a power request value of the front axle drive motor and / or a power request value of the rear axle drive motor; When the actual torque ratio, the power request value of the drive motor, and the driving mode of the vehicle all meet preset conditions, setting the feedback adjustment flag; Wherein, the calculation module is also used for: When the difference between the actual torque ratio and the torque distribution ratio is greater than a preset threshold and lasts for a preset time, outputting first activation information; When the power request value of the front axle drive motor is equal to the power limit value of the front axle drive motor, and / or the power request value of the rear axle drive motor is equal to the power limit value of the rear axle drive motor, outputting second activation information; When the driving mode of the vehicle is the direct drive mode, outputting third activation information; When the first activation information, the second activation information and the third activation information are all received, the feedback adjustment flag is set.

8. A vehicle, characterized in that: The vehicle includes an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the vehicle power distribution method as described in any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the vehicle power distribution method as described in any one of claims 1 to 6 are implemented.

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