A vehicle torque distribution method and device, electronic equipment and storage medium

Abstract

Embodiments of the present application disclose a vehicle torque distribution method and device, electronic equipment and a storage medium. The method comprises: determining driving parameter information of a target vehicle; the driving parameter information comprises a reducer transmission ratio, front and rear drive motor torques and front and rear drive motor speeds; based on a pre-set front and rear drive motor torque distribution coefficient, motor drive efficiency of the target vehicle under different torque distribution coefficients is determined according to the driving parameter information of the target vehicle; target motor drive efficiency is determined, and a target torque distribution coefficient corresponding to the target motor drive efficiency is respectively distributed to the front and rear drive motors. By adopting the technical scheme of the embodiments of the present application, the front drive motor and the rear drive motor are disconnected by disconnecting the connecting device, the driving conditions when the single drive motor drives alone are fully considered, the power loss when the drive follows the rotation is reduced, and the driving economy and the power performance of the target vehicle are improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of electric vehicle electronic control technology, and in particular to a vehicle torque distribution method, device, electronic device, and storage medium. Background Art

[0002] In the current environment where automobile fuel consumption and emission regulations in various countries around the world are becoming increasingly stringent, pure electric vehicles have the advantages of energy saving, high efficiency and zero emissions. Therefore, many countries are currently committed to promoting the research and development and marketization of pure electric vehicles.

[0003] Current torque control technologies for pure electric four-wheel drive vehicles use a method that optimizes the combined efficiency of the front and rear motors to calculate economical distribution. While one motor is driving, the other rotates with it. As a result, torque distribution during the four-wheel drive process isn't strictly based on the combined efficiency of the front and rear motors. If a single axle has optimal drive efficiency, the other motor often rotates with it, causing noise, vibration, and harshness issues and unnecessary power loss. Summary of the Invention

[0004] Embodiments of the present invention provide a vehicle torque distribution method, device, electronic device, and storage medium, which fully consider the working conditions of single-motor drive to reduce power loss during drive rotation.

[0005] In a first aspect, an embodiment of the present invention provides a vehicle torque distribution method, comprising:

[0006] Determining driving parameter information of the target vehicle; the driving parameter information includes a speed reducer ratio, front and rear drive motor torques, and front and rear drive motor speeds;

[0007] Determining the motor drive efficiency of the target vehicle under different torque distribution coefficients based on preset front and rear drive motor torque distribution coefficients; wherein the torque distribution coefficient represents the drive ratio of the front and rear drive motors, and the torque distribution coefficient includes the torque distribution coefficient when driving with a single drive motor and the torque distribution coefficient when driving with two drive motors;

[0008] The target motor driving efficiency is determined, and the target torque distribution coefficient corresponding to the target motor driving efficiency is distributed to the front and rear drive motors respectively.

[0009] In a second aspect, an embodiment of the present invention further provides a vehicle torque distribution device, comprising:

[0010] A driving parameter information determination module is used to determine the driving parameter information of the target vehicle; the driving parameter information includes the speed reducer transmission ratio, the front and rear drive motor torques, and the front and rear drive motor speeds;

[0011] a motor drive efficiency determination module, configured to determine the motor drive efficiency of the target vehicle under different torque distribution coefficients based on preset front and rear drive motor torque distribution coefficients; wherein the torque distribution coefficient represents the drive ratio of the front and rear drive motors, and includes a torque distribution coefficient for a single drive motor and a torque distribution coefficient for a dual drive motor;

[0012] The vehicle torque distribution module is used to determine the target motor driving efficiency and distribute the target torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors respectively.

[0013] In a third aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0014] one or more processors;

[0015] a storage device for storing one or more programs;

[0016] When the one or more programs are executed by the one or more processors, the one or more processors implement the vehicle torque distribution method described in any embodiment of the present invention.

[0017] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the vehicle torque distribution method described in any embodiment of the present invention.

[0018] The embodiment of the present invention provides a vehicle torque distribution method, device, electronic device and storage medium, which determines the driving parameter information of the target vehicle; the driving parameter information includes the speed ratio of the reducer, the torque of the front and rear drive motors, and the speed of the front and rear drive motors; based on the preset front and rear drive motor torque distribution coefficients, determines the motor driving efficiency of the target vehicle under different torque distribution coefficients according to the driving parameter information of the target vehicle; determines the target motor driving efficiency, and distributes the target torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors respectively. Using the technical solution of the embodiment of the present invention, the optimal motor driving efficiency is determined based on the preset motor torque distribution coefficient, thereby determining the target torque distribution coefficient; and the torque is distributed based on the target torque distribution coefficient. The front drive motor is disconnected from the rear drive motor by a disconnection device, fully considering the driving efficiency of the single drive motor when driving alone, reducing unnecessary power loss, and improving the driving economy and power of the target vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects, and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered as limiting the present invention. Like reference characters are used throughout the drawings to denote like parts. In the drawings:

[0020] Figure 1 is a flow chart of a vehicle torque distribution method provided in an embodiment of the present invention;

[0021] Figure 2 is a flow chart of another vehicle torque distribution method provided in an embodiment of the present invention;

[0022] Figure 3 1 is a schematic structural diagram of a vehicle torque distribution device provided in an embodiment of the present invention;

[0023] Figure 4 It is a structural diagram of an electronic device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0025] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the various operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0026] Among them, the acquisition, storage, use and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

[0027] Figure 1 This is a flow chart of a vehicle torque distribution method provided in an embodiment of the present invention. This embodiment is applicable to torque distribution in pure electric four-wheel drive vehicles. The method of this embodiment can be executed by a vehicle torque distribution device, which can be implemented in hardware and / or software. The device can be configured in a vehicle torque distribution server. The method specifically includes the following steps:

[0028] S110, determine the driving parameter information of the target vehicle.

[0029] The target vehicle can be a pure electric four-wheel drive vehicle, which is powered by an on-board power source and driven by a motor. The driving parameter information of the target vehicle includes, but is not limited to, the transmission ratio of the decelerator, the front and rear drive motor torque, and the front and rear drive motor speed. The torque can be the force that causes an object to rotate, and the torque of the motor is the torque output from the crankshaft end. Under the condition of fixed power, the torque is inversely proportional to the motor speed, the faster the speed, the smaller the torque, and vice versa. Torque reflects the load capacity of the vehicle within a certain range. For example, when the target vehicle starts or drives in mountainous areas, the higher the torque, the better the target vehicle runs. Compared with the same type of engine car, the greater the torque output, the greater the load capacity, the better the acceleration performance, and the stronger the climbing force.

[0030] As an optional but non-limiting implementation, the determination of the driving parameter information of the target vehicle includes, but is not limited to, steps A1-A2:

[0031] Step A1: Obtain the driving parameter information of the target vehicle, and statistically analyze the driving parameter information to determine the drive motor torque and drive motor speed that are frequently used by the target vehicle in each driving mode. The driving mode includes comfort mode, economy mode, and sports mode.

[0032] The test data of the target vehicle is analyzed to obtain the driving parameter information of the target vehicle, and the driving parameter information is statistically analyzed to obtain the motor torque and speed range that are frequently used in each driving mode. For example, the drive motor torque frequently used by the target vehicle in the economy mode is 120 N·m, and the drive motor speed range frequently used is usually around 4000 r / min.

[0033] Step A2: Determine at least one first motor efficiency and at least one first zero-torque loss power of the front drive motor, and at least one second motor efficiency and at least one second zero-torque loss power of the rear drive motor through bench testing of each drive motor.

[0034] Among them, the motor efficiency of the front and rear drive motors at different speeds and torques and the zero-torque loss power at different speeds are obtained through motor bench tests. Among them, the motor efficiency is used to characterize the motor efficiency at different torques and speeds; the zero-torque loss power refers to the power lost when the drive does not do work and only rotates. The first zero-torque loss power is used to characterize the torque loss power of the front drive motor when the subsequent drive motor rotates at different speeds, and the second zero-torque loss power is used to characterize the torque loss power of the rear drive motor when it rotates with the front drive motor at different speeds. For example, the motor efficiency of the front drive motor is determined based on the motor torque and speed range with higher frequency of use of the target vehicle, and the zero-torque loss power of the front drive motor when the subsequent drive motor rotates is determined.

[0035] When the front drive motor drives the rear drive motor, the rear drive motor does not generate power, resulting in power loss and potentially causing noise, vibration, and harshness issues. In this embodiment of the present invention, a disconnect mechanism can be used to disconnect the front and rear drive motors, allowing a single motor to operate independently. This single-motor drive system can meet daily driving needs while reducing unnecessary power loss.

[0036] S120 : Based on the preset front and rear drive motor torque distribution coefficients, determine the motor driving efficiency of the target vehicle under different torque distribution coefficients according to the driving parameter information of the target vehicle.

[0037] The torque distribution coefficient represents the driving ratio of the front and rear drive motors. The torque distribution coefficient includes the torque distribution coefficient when driving with a single drive motor and the torque distribution coefficient when driving with two drive motors. For example, the torque distribution coefficient of the front and rear drive motors can be represented by (0:x:1), where 0 represents the front drive motor, 1 represents the rear drive motor, and x represents the distribution ratio of the rear drive motor.

[0038] In an optional solution of an embodiment of the present invention, if the torque distribution coefficient is (0:0.1:1), it indicates that the front and rear drive motors are driven simultaneously, with the torque distribution ratio of the rear drive motor being 0.1 and the torque distribution ratio of the front drive motor being 0.9. If the value of x is greater than 0 and less than 1, it indicates that the target vehicle is driven by two motors, and the specific drive distribution ratio is determined by x.

[0039] In another optional scheme of an embodiment of the present invention, if the torque distribution coefficient is (0:0:1), it indicates that the target vehicle is driven by a single drive motor, the torque distribution ratio of the rear drive motor is 0, and the torque distribution ratio of the front drive motor is 1; the front drive motor is driven alone, and the rear drive motor rotates accordingly.

[0040] In an alternative embodiment of the present invention, if the torque distribution coefficient is (0:1:1), the target vehicle is driven by a single drive motor, the torque distribution ratio of the rear drive motor is 1, and the rear drive motor is driven independently. In this case, the front drive motor is disconnected from the rear drive motor by the disconnection device, and the rear drive motor is used alone for driving, and the front drive motor does not rotate.

[0041] As an optional but non-limiting implementation, based on the preset front and rear drive motor torque distribution coefficients, determining the motor drive efficiency of the target vehicle under different torque distribution coefficients according to the target vehicle's driving parameter information includes but is not limited to steps B1-B2:

[0042] Step B1: Pre-set different front and rear drive motor torque distribution coefficients according to different driving conditions.

[0043] The different driving operating conditions include, but are not limited to, the front drive motor driving with the rear drive motor following, and the rear drive motor driving with the front drive motor disconnected. "Rear drive motor driving" and "front drive motor disconnected" are used to indicate that a disconnection device is installed on the front drive motor to disconnect the front drive motor from the rear drive motor, allowing the rear drive motor to be driven independently without the front drive motor following. The disconnection device may refer to disconnecting the front drive motor from the rear drive motor, allowing the front drive motor to be driven by a single drive motor.

[0044] Step B2: Determine the driving efficiency of at least one motor of the target vehicle under different required torques, different driving speeds, and different torque distribution coefficients according to the required torque and the driving speed.

[0045] In one optional solution of the present invention, a statistical analysis of driving parameter information is performed to determine the target vehicle's most frequently used drive motor torque and speed in each driving mode. The motor drive efficiency is then determined for different driving modes, with different required torques, driving speeds, and torque distribution coefficients. For example, the motor drive efficiency of the target vehicle is determined in economy mode, with a frequently used motor torque of 120 N·m, a frequently used speed of 40 km / h, and a torque distribution coefficient of (0:0.1:1).

[0046] In another alternative embodiment of the present invention, the motor drive efficiency of the target vehicle can be determined using different modes, different required torques, different motor speeds, and different torque distribution coefficients. For example, the motor drive efficiency of the target vehicle is determined in economy mode, with a frequently used motor torque of 120 N·m, a frequently used speed of 4000 r / min, and a torque distribution coefficient of (0:0.1:1).

[0047] Optionally, if the target vehicle is driven by both a front drive motor and a rear drive motor, the dual-motor drive efficiency is:

[0048]

[0049] in, η is the dual motor drive efficiency, P mechEM1 is the mechanical efficiency of the front drive motor, P mechEM2 is the mechanical efficiency of the rear drive motor; P elEM1 P is the zero torque loss power of the front drive motor when the rear drive motor is driven alone and the front drive motor rotates with it. elEM2 is the zero torque loss power of the rear drive motor when the front drive motor drives alone and the rear drive motor rotates accordingly, T1 is the torque of the front drive motor, n1 is the speed of the front drive motor, T2 is the torque of the rear drive motor, n2 is the speed of the rear drive motor, η1 is the driving efficiency when the front drive motor drives alone, and η2 is the driving efficiency when the rear drive motor drives alone.

[0050] If the front drive motor is driven alone, the driving efficiency of the front drive motor is:

[0051]

[0052] It should also be noted that if the rear drive motor is driven alone, the front drive motor can be completely disconnected from the rear drive motor by disconnecting the coupling device, and will not participate in related operations such as the rear drive motor following the rotation. There is no zero torque loss power situation for the front drive motor.

[0053] S130 : Determine a target motor driving efficiency, and distribute a target torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors, respectively.

[0054] Among them, the most efficient target motor driving efficiency is determined from at least one motor driving efficiency, and a target torque distribution coefficient corresponding to the target motor driving efficiency is determined, and the target torque distribution coefficient is distributed to the front drive motor and the rear drive motor.

[0055] As an optional but non-limiting implementation, determining the target motor driving efficiency includes but is not limited to steps C1-C2:

[0056] Step C1: Determine at least one motor driving efficiency of the target vehicle.

[0057] Step C2: Arrange the at least one motor driving efficiency in descending order, and use the motor driving efficiency that ranks first as the target motor driving efficiency.

[0058] Based on the preset front and rear drive motor torque distribution coefficients, at least one motor drive efficiency of the target vehicle is determined under different torque distribution coefficients; the highest motor drive efficiency among the at least one motor drive efficiency is selected as the target motor drive efficiency. For example, all motor drive efficiencies are sorted from smallest to largest, and the motor drive efficiency ranked first is selected as the target motor drive efficiency. If the motor drive efficiencies include 85%, 90%, 91%, and 89%, and the motor drive efficiencies are sorted in the order of 91% > 90% > 89% > 85%, 91% is selected as the target motor drive efficiency.

[0059] As an optional but non-limiting implementation, determining the target motor driving efficiency and distributing the torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors respectively include but are not limited to steps D1-D2:

[0060] Step D1: Determine a target torque distribution coefficient corresponding to a target motor driving efficiency.

[0061] Step D2: performing economical torque distribution on the front and rear torque motors of the target vehicle in the target driving mode according to the target torque distribution coefficient; wherein the target driving mode includes a comfort mode and an economy mode.

[0062] Among them, after determining the target torque distribution coefficient corresponding to the target motor driving efficiency, the target torque distribution coefficient is distributed to the front and rear torque motors of the target vehicle in the economy mode or the comfort mode. The driving modes of the target vehicle include but are not limited to economy mode, comfort mode, sports mode and off-road mode. When the target vehicle is in economy mode or comfort mode, the driver considers the power loss, economy and driving comfort of the target vehicle. In the embodiment of the present invention, determining the motor driving efficiency and the torque distribution coefficient is to determine that the comprehensive driving efficiency of the front and rear drive motors is the highest under the target torque distribution coefficient, the power loss is reduced, and the occurrence of noise, vibration and acoustic harshness can be avoided.

[0063] In an optional scheme of an embodiment of the present invention, if the target motor driving efficiency is obtained when the front drive motor is driven alone and the rear drive motor rotates accordingly, then the target torque distribution coefficient is (0:0:1), and all the torque is distributed to the front drive motor, and the front drive motor drives the target vehicle alone.

[0064] In another alternative embodiment of the present invention, if the rear drive motor achieves the highest driving efficiency when driven alone, the motor driving efficiency when driven alone is used as the target motor driving efficiency. In this case, the corresponding target torque distribution coefficient is (0:1:1), and all torque is distributed to the rear drive motor, which then drives the target vehicle alone. When the rear drive motor is driven alone, the front drive motor and the rear drive motor can be disconnected by a disconnection coupling device, allowing the rear drive motor to drive alone without the front drive motor rotating. In this case, the front drive motor does not experience zero torque loss power.

[0065] In another alternative embodiment of the present invention, if the highest driving efficiency is achieved when the front and rear drive motors jointly drive the target vehicle, a target motor driving efficiency for the joint driving is determined, and a target torque distribution coefficient corresponding to the target motor driving efficiency is determined. If the target torque distribution coefficient is (0:0.4:1), the torque distribution ratio between the front and rear drive motors is 6:4.

[0066] As an optional but non-limiting implementation, determining the target motor driving efficiency and distributing the target torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors respectively include but are not limited to steps E1-E3:

[0067] Step E1: performing a drum test on a target torque distribution coefficient corresponding to the target motor driving efficiency to determine the economic efficiency test results of the target vehicle under different driving conditions.

[0068] Step E2: adjusting the target torque distribution coefficient corresponding to the target motor driving efficiency according to the economic efficiency detection result to determine the adjusted target torque distribution coefficient.

[0069] Step E3: Distribute torque to the front and rear drive motors of the target vehicle according to the adjusted target torque distribution coefficient.

[0070] If the distribution coefficients obtained within similar driving torque and speed ranges vary too rapidly, the target torque distribution coefficients are adjusted. For example, if the target torque distribution coefficients obtained for similar torque and speed values ​​are (0:0.55:1) and (0:0.3:1), respectively, and the torque distribution coefficients vary significantly, the target torque distribution coefficients are adjusted. Alternatively, if the target torque distribution coefficients obtained for similar torque and speed values ​​vary significantly, but the corresponding target motor drive efficiency differences are within a preset difference threshold, the target torque distribution may not be adjusted.

[0071] In an optional solution of the embodiment of the present application, the target torque distribution coefficient is subjected to a drum test, and the optimal distribution coefficient calculated and the distribution coefficient optimized according to the strategy are subjected to a China Light Vehicle Test Cycle (CLTC) test comparison, and the distribution coefficient with the optimal test result is selected as the final result of the vehicle economic torque distribution according to different results of the steady speed working condition and the acceleration and deceleration working condition.

[0072] As an optional but non-limiting implementation, the target motor drive efficiency is determined, and the target torque distribution coefficient corresponding to the target motor drive efficiency is respectively distributed to the front and rear drive motors, including but not limited to steps F1-F3:

[0073] Step F1: If the driving mode of the target vehicle is the sports mode, the sports parameter information of the target vehicle is obtained; the sports parameter information includes the vehicle wheelbase, the distance between the vehicle center of mass and the front axle, the vehicle center of mass height, and the vehicle acceleration.

[0074] Step F2: According to the sports parameter information of the target vehicle, the power distribution result corresponding to the sports mode of the target vehicle is determined.

[0075] Step F3: According to the power distribution result, the power torque of the front and rear drive motors of the target vehicle is distributed.

[0076] When the target vehicle is in the sports mode or the off-road mode, the sports parameter information of the target vehicle is obtained; the power distribution result is determined according to the sports parameter information, and the torque of the target vehicle is distributed according to the power distribution result. According to the target vehicle sports mode selection and the power demand, if the power torque of the vehicle needs to be distributed, the power distribution calculation is performed by using the vehicle parameters:

[0077]

[0078] wherein, wheelbase is the vehicle wheelbase, length front-cog is the distance from the vehicle center of mass to the front axle, height cog is the vehicle center of mass height, slopg is the road slope, a x is the vehicle acceleration, and g is the gravity acceleration.

[0079] The driving parameter information with the highest drive efficiency and the power distribution result are determined, and the torque of the target vehicle in the off-road mode or the sports mode is distributed according to the power distribution result, so that the driving experience of the driver is better in the working condition with high power demand.

[0080] In an optional solution of the embodiment of the present application, referring to Figure 2, the driving mode of the target vehicle can be determined first, and the power distribution calculation or the economic distribution calculation can be performed according to the driving mode of the target vehicle; when performing the economic distribution calculation for the target vehicle, it is determined whether the coupling device needs to be disconnected; the front drive motor is disconnected from the rear drive motor by disconnecting the coupling device, and the rear drive motor is used to drive alone, and the front drive motor does not rotate, thereby reducing power loss during rotation.

[0081] An embodiment of the present invention provides a vehicle torque distribution method, which determines the driving parameter information of a target vehicle; the driving parameter information includes the speed ratio of the reducer, the torque of the front and rear drive motors, and the speed of the front and rear drive motors; based on the preset front and rear drive motor torque distribution coefficients, determines the motor driving efficiency of the target vehicle under different torque distribution coefficients according to the driving parameter information of the target vehicle; determines the target motor driving efficiency, and distributes the target torque distribution coefficients corresponding to the target motor driving efficiency to the front and rear drive motors respectively. Using the technical solution of the embodiment of the present invention, the optimal motor driving efficiency is determined based on the preset motor torque distribution coefficients, thereby determining the target torque distribution coefficients; and distributing the torque based on the target torque distribution coefficients. The front drive motor is disconnected from the rear drive motor by a disconnection coupling device, fully considering the driving efficiency of the single drive motor when driving alone, reducing unnecessary power loss, and improving the driving economy and power of the target vehicle.

[0082] Figure 3 This is a schematic diagram of the structure of a vehicle torque distribution device provided in an embodiment of the present invention. The technical solution of this embodiment is applicable to the case of torque distribution of pure electric four-wheel drive vehicles. The device can be implemented by software and / or hardware and is generally integrated into any electronic device with network communication function, including but not limited to: servers, computers, personal digital assistants and other devices. Figure 3 As shown, the vehicle torque distribution device provided in this embodiment includes: a driving parameter information determination module 310, a motor drive efficiency determination module 320 and a vehicle torque distribution module 330; wherein,

[0083] A driving parameter information determination module 310 is configured to determine driving parameter information of a target vehicle; the driving parameter information includes a speed reducer ratio, front and rear drive motor torques, and front and rear drive motor speeds;

[0084] a motor drive efficiency determination module 320 for determining the motor drive efficiency of the target vehicle under different torque distribution coefficients based on preset front and rear drive motor torque distribution coefficients; wherein the torque distribution coefficient represents the drive ratio of the front and rear drive motors, and includes a torque distribution coefficient for a single drive motor and a torque distribution coefficient for a dual drive motor;

[0085] The vehicle torque distribution module 330 is configured to determine a target motor driving efficiency and distribute a target torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors, respectively.

[0086] Based on the above embodiment, optionally, the driving parameter information determination module includes:

[0087] Obtaining driving parameter information of the target vehicle and performing statistical analysis on the driving parameter information to determine a driving motor torque and a driving motor speed that are used more frequently by the target vehicle in each driving mode; wherein the driving modes include a comfort mode, an economy mode, and a sport mode;

[0088] Determining at least one first motor efficiency and at least one first zero-torque loss power of the front drive motor, and at least one second motor efficiency and at least one second zero-torque loss power of the rear drive motor by performing bench tests on each drive motor;

[0089] Among them, the motor efficiency is used to characterize the motor efficiency at different torques and speeds; the first zero-torque loss power is used to characterize the torque loss power when the front drive motor rotates at different speeds and the subsequent drive motor rotates; the second zero-torque loss power is used to characterize the torque loss power when the rear drive motor rotates with the front drive motor at different speeds.

[0090] Based on the above embodiment, optionally, the motor driving efficiency determination module includes:

[0091] Different front and rear drive motor torque distribution coefficients are pre-set according to different driving conditions; wherein the different driving conditions include the front drive motor driving the rear drive motor and rotating with it, and the rear drive motor driving the front drive motor and disconnecting it; the rear drive motor driving the front drive motor and disconnecting it is used to indicate that a disconnection device is installed at the front drive motor to disconnect the front drive motor from the rear drive motor, so that the rear drive motor is driven alone and the front drive motor does not rotate with it;

[0092] According to the required torque and the driving speed, at least one motor driving efficiency of the target vehicle under different required torques, different driving speeds, and different torque distribution coefficients is determined.

[0093] Based on the above embodiment, optionally, the vehicle torque distribution module includes:

[0094] determining a drive efficiency of at least one motor of the target vehicle;

[0095] The at least one motor driving efficiency is arranged in descending order, and the motor driving efficiency that ranks first is used as the target motor driving efficiency.

[0096] Based on the above embodiment, optionally, the vehicle torque distribution module further includes:

[0097] determining a target torque distribution coefficient corresponding to a target motor driving efficiency;

[0098] Economic torque distribution is performed on the front and rear torque motors of the target vehicle in a target driving mode according to the torque distribution coefficient; wherein the target driving mode includes a comfort mode and an economy mode.

[0099] Based on the above embodiment, optionally, the vehicle torque distribution module further includes:

[0100] Conduct drum tests on the target torque distribution coefficient corresponding to the target motor drive efficiency to determine the economic performance of the target vehicle under different driving conditions;

[0101] adjusting a target torque distribution coefficient corresponding to a target motor driving efficiency according to the economic efficiency test result to determine an adjusted target torque distribution coefficient;

[0102] The torque is distributed to the front and rear drive motors of the target vehicle according to the adjusted target torque distribution coefficient.

[0103] Based on the above embodiment, optionally, the vehicle torque distribution module further includes:

[0104] If the driving mode of the target vehicle is a sport mode, obtaining motion parameter information of the target vehicle; the motion parameter information includes vehicle wheelbase, distance between the vehicle center of mass and the front axle, vehicle center of mass height, and vehicle acceleration;

[0105] Determining a power distribution result corresponding to a motion mode of the target vehicle based on motion parameter information of the target vehicle;

[0106] Dynamic torque is distributed to the front and rear drive motors of the target vehicle according to the dynamic distribution result.

[0107] The vehicle torque distribution device provided in the embodiment of the present invention can execute the vehicle torque distribution method provided in any embodiment of the present invention mentioned above, and has the corresponding functions and beneficial effects of executing the vehicle torque distribution method. For detailed process, please refer to the relevant operations of the vehicle torque distribution method in the above embodiment.

[0108] Figure 41 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. The electronic device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0109] like Figure 4 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11. The memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0110] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0111] The processor 11 may be any general-purpose and / or specialized processing component with processing and computing capabilities. Examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any other suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the vehicle torque distribution method.

[0112] In some embodiments, the vehicle torque distribution method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the vehicle torque distribution method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to execute the vehicle torque distribution method in any other suitable manner (e.g., via firmware).

[0113] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0114] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0115] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0116] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0117] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0118] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0119] It should be understood that the various forms of flow shown above can be reordered, added to, or have steps deleted. For example, the steps described in the present application can be performed in parallel, in series, or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0120] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle torque distribution method, characterized in that: The method comprises: Acquire driving parameter information of the target vehicle, and perform statistical analysis on the driving parameter information to determine the driving motor torque and driving motor speed that are used more frequently by the target vehicle in each driving mode; determine at least one first motor efficiency and at least one first zero-torque loss power of the front driving motor, and at least one second motor efficiency and at least one second zero-torque loss power of the rear driving motor by performing bench tests on each driving motor; wherein, the driving modes include a comfort mode, an economy mode, and a sport mode; the driving parameter information includes a reducer transmission ratio, the front and rear driving motor torques, and the front and rear driving motor speeds; the motor efficiency is used to characterize the motor efficiency at different torques and speeds; the first zero-torque loss power is used to characterize the torque loss power of the front driving motor when the subsequent driving motor rotates at different speeds, and the second zero-torque loss power is used to characterize the torque loss power of the rear driving motor when it rotates with the front driving motor at different speeds; According to different driving conditions, different front and rear drive motor torque distribution coefficients are pre-set; according to the required torque and the driving speed, the driving efficiency of at least one motor of the target vehicle under different required torques, different driving speeds and different torque distribution coefficients is determined; wherein the torque distribution coefficient represents the driving ratio of the front and rear drive motors, and the torque distribution coefficient includes the torque distribution coefficient when a single drive motor is driven and the torque distribution coefficient when a dual drive motor is driven; the different driving conditions include the front drive motor driving the rear drive motor and rotating with it, and the rear drive motor driving the front drive motor and disconnecting it; the rear drive motor driving the front drive motor and disconnecting it is used to represent that a disconnection device is installed at the front drive motor to disconnect the front drive motor from the rear drive motor, so that the rear drive motor is driven alone and the front drive motor does not rotate with it; determining a target motor driving efficiency and distributing a target torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors respectively; The step of determining the target motor driving efficiency and distributing the target torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors includes: Performing a drum test on a target torque distribution coefficient corresponding to a target motor drive efficiency to determine an economy test result of the target vehicle under different driving conditions; adjusting the target torque distribution coefficient corresponding to the target motor drive efficiency based on the economy test result to determine an adjusted target torque distribution coefficient; and distributing torque between the front and rear drive motors of the target vehicle based on the adjusted target torque distribution coefficient; Alternatively, if the driving mode of the target vehicle is a sports mode, the motion parameter information of the target vehicle is obtained; the motion parameter information includes the vehicle wheelbase, the distance between the vehicle center of mass and the front axle, the vehicle center of mass height and the vehicle acceleration; based on the motion parameter information of the target vehicle, the dynamic distribution result corresponding to the target vehicle's sports mode is determined; and dynamic torque is distributed to the front and rear drive motors of the target vehicle based on the dynamic distribution result.

2. The method according to claim 1, characterized in that Determining the target motor driving efficiency includes: determining a drive efficiency of at least one motor of the target vehicle; The at least one motor driving efficiency is arranged in descending order, and the motor driving efficiency that ranks first is used as the target motor driving efficiency.

3. The method according to claim 1, characterized in that The method of determining the target motor driving efficiency and distributing the target torque distribution coefficient corresponding to the target motor driving efficiency to the front and rear drive motors respectively includes: determining a target torque distribution coefficient corresponding to a target motor driving efficiency; Economic torque distribution is performed on the front and rear torque motors of the target vehicle in a target driving mode according to the target torque distribution coefficient; wherein the target driving mode includes a comfort mode and an economy mode.

4. A vehicle torque distribution device, characterized in that: The device comprises: A driving parameter information determination module is used to obtain driving parameter information of a target vehicle and perform statistical analysis on the driving parameter information to determine the driving motor torque and driving motor speed that are used more frequently by the target vehicle in each driving mode; by performing bench tests on each driving motor, at least one first motor efficiency and at least one first zero-torque loss power of the front driving motor, as well as at least one second motor efficiency and at least one second zero-torque loss power of the rear driving motor are determined; wherein, the driving modes include a comfort mode, an economy mode, and a sports mode; the driving parameter information includes a reducer transmission ratio, the front and rear driving motor torques, and the front and rear driving motor speeds; the motor efficiency is used to characterize the motor efficiency at different torques and speeds; the first zero-torque loss power is used to characterize the torque loss power of the front driving motor when the subsequent driving motor rotates at different speeds, and the second zero-torque loss power is used to characterize the torque loss power of the rear driving motor when it rotates with the front driving motor at different speeds; a motor drive efficiency determination module, configured to pre-set different front and rear drive motor torque distribution coefficients according to different driving conditions; and determine, based on the required torque and driving speed, the drive efficiency of at least one motor of the target vehicle under different required torques, different driving speeds, and different torque distribution coefficients; wherein the torque distribution coefficient represents the drive ratio of the front and rear drive motors, and the torque distribution coefficient includes the torque distribution coefficient when a single drive motor is driving and the torque distribution coefficient when a dual drive motor is driving; the different driving conditions include the front drive motor driving the rear drive motor and rotating with it, and the rear drive motor driving the front drive motor and disconnecting it; the rear drive motor driving the front drive motor and disconnecting it is used to represent that a disconnection coupling device is installed at the front drive motor to disconnect the front drive motor from the rear drive motor, so that the rear drive motor is driven alone and the front drive motor does not rotate with it; a vehicle torque distribution module, configured to determine a target motor drive efficiency and distribute a target torque distribution coefficient corresponding to the target motor drive efficiency to the front and rear drive motors, respectively; Wherein, the vehicle torque distribution module is specifically used to: Performing a drum test on a target torque distribution coefficient corresponding to a target motor drive efficiency to determine an economy test result of the target vehicle under different driving conditions; adjusting the target torque distribution coefficient corresponding to the target motor drive efficiency based on the economy test result to determine an adjusted target torque distribution coefficient; and distributing torque between the front and rear drive motors of the target vehicle based on the adjusted target torque distribution coefficient; Alternatively, if the driving mode of the target vehicle is a sports mode, the motion parameter information of the target vehicle is obtained; the motion parameter information includes the vehicle wheelbase, the distance between the vehicle center of mass and the front axle, the vehicle center of mass height and the vehicle acceleration; based on the motion parameter information of the target vehicle, the dynamic distribution result corresponding to the target vehicle's sports mode is determined; and dynamic torque is distributed to the front and rear drive motors of the target vehicle based on the dynamic distribution result.

5. An electronic device, characterized in that: include: one or more processors; a storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the vehicle torque distribution method described in any one of claims 1-3.

6. A storage medium containing computer-executable instructions, characterized in that: When the computer executable instructions are executed by a computer processor, they are used to perform the vehicle torque distribution method according to any one of claims 1 to 3.

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