Torque distribution methods, torque distribution devices and vehicles

Abstract

This application discloses a torque distribution method, a torque distribution device, and a vehicle, belonging to the field of vehicle technology. The torque distribution method includes: acquiring the vehicle's current total required torque and current vehicle speed; based on the current total required torque and current vehicle speed, searching in a torque distribution ratio mapping relationship to obtain the vehicle's target torque distribution ratio; and, if it is determined that the vehicle's allowable driving power consumption is less than a target power consumption threshold, distributing torque to the vehicle according to the target torque distribution ratio; wherein, the torque distribution ratio mapping relationship is used to characterize the correspondence between total required torque, vehicle speed, and a first torque distribution ratio, the first torque distribution ratio being obtained through driving simulation based on the vehicle's total required torque and vehicle speed, resulting in the torque distribution ratio that minimizes the vehicle's total drive loss. This method can achieve more economical torque distribution, effectively reduce the vehicle's system energy consumption, and help increase driving range.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, and particularly relates to a torque distribution method, torque distribution device and vehicle. Background Technology

[0002] Electric vehicles can rationally distribute power, or torque, among the drive wheels according to driving conditions and vehicle needs, in order to improve the vehicle's driving performance and energy efficiency.

[0003] Currently, most torque distribution is based on motor efficiency, which is the factory-calibrated bench data. This data differs from the actual driving conditions of the vehicle. Furthermore, the highest point of motor efficiency differs from the lowest point of system energy consumption, making it difficult to achieve economical torque distribution. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a torque distribution method, a torque distribution device, and a vehicle, which can achieve more economical torque distribution and help improve vehicle mileage.

[0005] In a first aspect, this application provides a torque distribution method, the method comprising:

[0006] Obtain the vehicle's current total torque demand and current speed;

[0007] Based on the current total torque demand and the current vehicle speed, the target torque distribution ratio of the vehicle is obtained by searching in the torque distribution ratio mapping relationship.

[0008] If it is determined that the vehicle's permissible driving power consumption is less than the target power consumption threshold, then the torque is distributed to the vehicle according to the target torque distribution ratio;

[0009] The torque distribution ratio mapping relationship is used to characterize the correspondence between total demand torque, vehicle speed and first torque distribution ratio. The first torque distribution ratio is the torque distribution ratio that minimizes the total drive loss of the vehicle, obtained by driving simulation based on the total demand torque and vehicle speed of the vehicle.

[0010] According to the torque distribution method of this application, by searching in the torque distribution ratio mapping relationship based on the vehicle's current total demand torque and current vehicle speed, a target torque distribution ratio that minimizes the total drive loss of the vehicle is obtained. For vehicles with low battery power or high energy consumption sensitivity, using the target torque distribution ratio for torque distribution effectively improves the efficiency and performance of the drive device, achieves a more economical torque distribution, can effectively reduce the vehicle's system energy consumption, and helps to increase the vehicle's driving range.

[0011] According to one embodiment of this application, the first torque distribution ratio is determined by the following steps:

[0012] Based on the total required torque and vehicle speed of the vehicle, a simulation is performed using the digital twin model of the vehicle to obtain the total drive loss of the vehicle corresponding to different torque distribution ratios output by the digital twin model.

[0013] The torque distribution ratio corresponding to the minimum total drive loss of the vehicle is taken as the first torque distribution ratio.

[0014] According to one embodiment of this application, the total drive loss of the vehicle is equal to the sum of the drive losses of each drive device of the vehicle. The digital twin model is used to simulate the drive loss of the drive device corresponding to different torque distribution ratios based on the current and voltage parameters, drive requested torque and drive speed of the drive device.

[0015] According to one embodiment of this application, the drive request torque of the drive device is determined based on the torque distribution ratio and the total torque demand of the vehicle, and the drive speed of the drive device is determined based on the vehicle speed, tire radius and reduction ratio.

[0016] According to one embodiment of this application, determining that the permissible driving power consumption of the vehicle is less than a target power consumption threshold includes:

[0017] When the vehicle's current driving mode is economy mode, it is determined that the vehicle's permissible driving power consumption is less than the target power consumption threshold.

[0018] According to one embodiment of this application, determining that the permissible driving power consumption of the vehicle is less than a target power consumption threshold includes:

[0019] Obtain the historical driving data of the vehicle;

[0020] If the historical driving data meets the economic driving conditions, it is determined that the vehicle's allowable driving power consumption is less than the target power consumption threshold.

[0021] Secondly, this application provides a torque distribution method, the method comprising:

[0022] Obtain the vehicle's current total torque demand and current speed;

[0023] Based on the current total required torque and the current vehicle speed, a driving simulation is performed on the vehicle to obtain the target torque distribution ratio that minimizes the current total drive loss of the vehicle.

[0024] If it is determined that the vehicle's permissible driving power consumption is less than the target power consumption threshold, the torque is distributed to the vehicle according to the target torque distribution ratio.

[0025] According to the torque distribution method of this application, the current total torque demand of the vehicle and the current vehicle speed are simulated in real time to obtain the target torque distribution ratio that minimizes the total drive loss of the vehicle. For vehicles with low battery power or high energy consumption sensitivity, the target torque distribution ratio is used to distribute torque, which effectively improves the efficiency and performance of the drive device, achieves a more economical torque distribution, can effectively reduce the system energy consumption of the vehicle, and helps to increase the vehicle's driving range.

[0026] Thirdly, this application provides a torque distribution device, which includes:

[0027] The first acquisition module is used to acquire the vehicle's current total torque demand and current vehicle speed;

[0028] The first processing module is used to search in the torque distribution ratio mapping relationship based on the current total demand torque and the current vehicle speed to obtain the target torque distribution ratio of the vehicle;

[0029] The second processing module is used to distribute torque to the vehicle according to the target torque distribution ratio when it is determined that the vehicle's allowable driving power consumption is less than the target power consumption threshold.

[0030] The torque distribution ratio mapping relationship is used to characterize the correspondence between total demand torque, vehicle speed and first torque distribution ratio. The first torque distribution ratio is the torque distribution ratio that minimizes the total drive loss of the vehicle, obtained by driving simulation based on the total demand torque and vehicle speed of the vehicle.

[0031] Fourthly, this application provides a torque distribution device, which includes:

[0032] The second acquisition module is used to acquire the vehicle's current total torque demand and current vehicle speed;

[0033] The third processing module is used to perform driving simulation on the vehicle based on the current total demand torque and the current vehicle speed, and obtain the target torque distribution ratio that minimizes the current total drive loss of the vehicle.

[0034] The fourth processing module is used to distribute torque to the vehicle according to the target torque distribution ratio when it is determined that the vehicle's permissible driving power consumption is less than the target power consumption threshold.

[0035] Fifthly, this application provides a vehicle, comprising:

[0036] At least two drive units;

[0037] The torque distribution device as described in the third or fourth aspect above is connected to the at least two drive devices and is used to distribute the torque of the at least two drive devices.

[0038] According to the vehicle of this application, a target torque distribution ratio that minimizes the total drive loss of the vehicle is obtained by using the vehicle's current total required torque and current vehicle speed. For vehicles with low battery power or high sensitivity to power consumption, the target torque distribution ratio is used for torque distribution, which effectively improves the efficiency and performance of the drive unit, achieves a more economical torque distribution, can effectively reduce the vehicle's system energy consumption, and helps to increase the vehicle's driving range.

[0039] In a sixth aspect, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the torque distribution method as described in the first or second aspect above.

[0040] In a seventh aspect, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the torque distribution method as described in the first or second aspect above.

[0041] Eighthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the torque distribution method as described in the first or second aspect above.

[0042] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0043] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0044] Figure 1 This is one of the flowcharts illustrating the torque distribution method provided in the embodiments of this application;

[0045] Figure 2 This is a second schematic flowchart of the torque distribution method provided in the embodiments of this application;

[0046] Figure 3 This is one of the structural schematic diagrams of the torque distribution device provided in the embodiments of this application;

[0047] Figure 4 This is a second schematic diagram of the torque distribution device provided in the embodiments of this application;

[0048] Figure 5 This is a schematic diagram of the vehicle structure provided in the embodiments of this application;

[0049] Figure 6 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0050] Figure label:

[0051] First acquisition module 310, first processing module 320, second processing module 330

[0052] Second acquisition module 410, third processing module 420, fourth processing module 430

[0053] Vehicle 500, drive unit 510, wheels 520. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0055] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0056] The torque distribution method, torque distribution device, vehicle 500, electronic device, and readable storage medium provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0057] The torque distribution method can be applied to vehicle 500, and can be executed by hardware or software in vehicle 500.

[0058] Vehicle 500 can be a new energy vehicle, such as a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle. Vehicle 500 can have a battery device installed inside, which can be located at the bottom, front, or rear of vehicle 500. The battery device can be used to power vehicle 500.

[0059] The vehicle 500 may also include a controller and at least two drive units 510. The controller is used to control the battery device to supply power to the drive units 510. The drive units 510 are used to convert electrical energy into mechanical energy to drive the vehicle 500 to start and move. For example, the drive unit 510 may be an electric motor.

[0060] The controller can also be used to distribute torque between at least two drive units 510, and distribute power to the wheels 520 through the drive units 510. This allows the vehicle 500 to dynamically adjust the power distribution between the wheels 520 according to road conditions and driving needs, providing better traction and handling stability.

[0061] like Figure 1 As shown, the torque distribution method includes steps 110, 120 and 130.

[0062] Step 110: Obtain the current total torque demand and current speed of vehicle 500.

[0063] The total torque demand of vehicle 500 refers to the torque required to drive wheels 520 under certain driving conditions to achieve the expected power performance and driving status.

[0064] It is understandable that the total torque demand is related to the characteristics of the drive unit 510 (e.g., motor characteristics), driving conditions (e.g., throttle opening), driving status (e.g., coasting, braking, cruise control, hill start assist, etc.), and configuration information (e.g., vehicle 500 weight, tire size, etc.). The total torque demand of the vehicle 500 can be determined based on the characteristics of the drive unit 510, driving conditions, driving status, configuration information, etc.

[0065] In this step, the current speed of vehicle 500 is obtained, and the current total torque demand of vehicle 500 is obtained.

[0066] It should be noted that the vehicle 500 includes at least two drive units 510, and the total torque required by the vehicle 500 is equal to the sum of the torques required by each drive unit 510.

[0067] Step 120: Based on the current total torque demand and the current vehicle speed, find the target torque distribution ratio for vehicle 500 in the torque distribution ratio mapping relationship.

[0068] Among them, the torque distribution ratio mapping relationship is used to characterize the correspondence between total demand torque, vehicle speed and first torque distribution ratio. The first torque distribution ratio is the torque distribution ratio that minimizes the total drive loss of vehicle 500, obtained by driving simulation based on the total demand torque and vehicle speed of vehicle 500.

[0069] Understandably, the torque distribution ratio refers to the proportion of power distributed among the various drive units 510 or wheels 520 in the drive system of a vehicle 500, such as in a four-wheel drive vehicle 500 or a multi-axle drive vehicle 500. It is very important for the handling, stability and power performance of the vehicle 500.

[0070] For example, a four-wheel drive vehicle 500 may include three motors: one on the front axle and two on the rear axle. When driving on dry roads, 60% of the torque can be distributed to the rear axle and 40% to the front axle. When driving on wet roads, more torque can be distributed to the front axle to increase traction.

[0071] It should be noted that in the torque distribution ratio mapping relationship, the input is the total required torque and the vehicle speed, and the output is the first torque distribution ratio. Based on the current total required torque and the current vehicle speed of vehicle 500, the first torque distribution ratio corresponding to the current total required torque and the current vehicle speed can be found in the torque distribution ratio mapping relationship, and this first torque distribution ratio is used as the target torque distribution ratio of vehicle 500.

[0072] Understandably, with a fixed total torque demand and vehicle speed, when vehicle 500 distributes torque according to different torque distribution ratios, the drive loss generated by the drive unit 510 of vehicle 500 will be different. Drive loss is the energy loss generated by drive unit 510 during operation. Drive loss may lead to a reduction in drive efficiency and affect the performance and lifespan of drive unit 510.

[0073] Among them, the total torque demand of vehicle 500 is equal to the sum of the torque demand of each drive unit 510, and the total drive loss of vehicle 500 is equal to the sum of the drive losses of each drive unit 510.

[0074] It is understandable that the torque distribution ratio mapping relationship includes multiple input conditions of total demand torque and vehicle speed, corresponding to multiple first torque distribution ratios. A certain first torque distribution ratio represents the torque distribution ratio that minimizes the total drive loss of vehicle 500 under the corresponding total demand torque and vehicle speed conditions.

[0075] In actual implementation, driving simulation can be performed based on the total required torque and speed of vehicle 500. The simulation will show the total drive loss of vehicle 500 under a certain input condition when using different torque distribution ratios. The torque distribution ratio with the minimum total drive loss of vehicle 500 will be taken as the first torque distribution ratio.

[0076] For example, the total torque demand that vehicle 500 may have is {A1, A2, ..., An}, and the speed that vehicle 500 may have is {B1, B2, ..., Bn}.

[0077] For the total required torque A2 and vehicle speed B1, a driving simulation is performed to calculate the total drive loss corresponding to the torque distribution ratio {C1, C2, ..., Cn}. Among them, the total drive loss corresponding to C2 is the smallest, so C2 is the first torque distribution ratio corresponding to the input condition of total required torque A2 and vehicle speed B1.

[0078] Iterate through the total torque demand and speed of vehicle 500, calculate the first torque distribution ratio corresponding to each input condition, and obtain the torque distribution ratio mapping relationship.

[0079] In this embodiment, if the current total torque demand of vehicle 500 is equal to A2 and the current vehicle speed is equal to B1, the target torque distribution ratio of vehicle 500 can be obtained by searching in the torque distribution ratio mapping relationship. By distributing torque according to the target torque distribution ratio that minimizes the total drive loss of vehicle 500, the efficiency and performance of drive device 510 can be effectively improved, which helps to increase the driving range of vehicle 500.

[0080] Step 130: If the permissible driving power consumption of vehicle 500 is determined to be less than the target power consumption threshold, the torque of vehicle 500 is distributed according to the target torque distribution ratio.

[0081] Among them, the permissible driving power consumption of vehicle 500 refers to the amount of electricity that the drive unit 510 is allowed to consume during the driving process of vehicle 500.

[0082] It should be noted that the target energy consumption threshold can be a pre-set energy threshold used to judge the vehicle's energy level or energy consumption sensitivity.

[0083] If the permissible driving power consumption of vehicle 500 is less than the target power consumption threshold, it indicates that vehicle 500 has low power or high power consumption sensitivity. By distributing torque to vehicle 500 through the target torque distribution ratio, the efficiency and performance of drive unit 510 can be effectively improved, achieving a more economical torque distribution and helping to increase the driving range of vehicle 500.

[0084] Understandably, if the permissible driving power consumption of vehicle 500 is greater than or equal to the target power consumption threshold, it indicates that vehicle 500 has a large amount of power or low power consumption sensitivity. In this case, the target torque distribution ratio can be used to distribute torque to vehicle 500.

[0085] In actual implementation, the relationship between the allowable driving power consumption of vehicle 500 and the target power consumption threshold can be determined based on the driving mode, driving habits, or user parameter settings of vehicle 500. For vehicle 500 with low power or high power consumption sensitivity, the target torque distribution ratio can be found from the torque distribution ratio mapping relationship to distribute torque, thereby improving the efficiency and performance of drive unit 510, achieving more economical torque distribution, and helping to increase the driving range of vehicle 500.

[0086] In related technologies, torque distribution is based on motor efficiency. The motor efficiency is the bench calibration data provided by the manufacturer, which has a certain gap with the actual driving of the vehicle. In addition, the highest point of motor efficiency is different from the lowest point of system energy consumption, making it difficult to achieve economical torque distribution.

[0087] In this embodiment, the target torque distribution ratio that minimizes the total drive loss of vehicle 500 is obtained by searching the torque distribution ratio mapping relationship based on the current total demand torque and current vehicle speed of vehicle 500. The process of searching for the target torque distribution ratio in the torque distribution ratio mapping relationship is simple and fast. For vehicle 500 with low battery or high energy consumption sensitivity, a target torque distribution ratio that matches the current total demand torque and current vehicle speed can be used for torque distribution, which effectively improves the efficiency and performance of drive device 510, achieves more economical torque distribution, effectively reduces the system energy consumption of vehicle 500, and helps to increase the driving range of vehicle 500.

[0088] According to the torque distribution method provided in this application embodiment, by searching in the torque distribution ratio mapping relationship based on the current total demand torque and current vehicle speed of vehicle 500, a target torque distribution ratio that minimizes the total drive loss of vehicle 500 is obtained. For vehicle 500 with low battery or high energy consumption sensitivity, the target torque distribution ratio is used for torque distribution, which effectively improves the efficiency and performance of drive device 510, achieves more economical torque distribution, can effectively reduce the system energy consumption of vehicle 500, and helps to increase the driving range of vehicle 500.

[0089] In some embodiments, the first torque distribution ratio is determined by the following steps:

[0090] Based on the total required torque and speed of vehicle 500, a simulation is performed using a digital twin model of vehicle 500 to obtain the total drive loss of vehicle 500 corresponding to different torque distribution ratios output by the digital twin model.

[0091] The torque distribution ratio corresponding to the minimum total drive loss of vehicle 500 is taken as the first torque distribution ratio.

[0092] Understandably, digital twins utilize data such as physical models, sensors, and operational history to integrate simulation processes involving multiple physical quantities, scales, and probabilities, completing mapping in virtual space to reflect the entire lifecycle of the corresponding physical equipment.

[0093] The digital twin model of vehicle 500 is a virtual model that can reflect the entire life cycle of vehicle 500. It can be constructed using actual vehicle 500 data, driven by the digital twin model, to realize the processing and analysis of dynamic data and simulate the driving process of vehicle 500.

[0094] In this embodiment, based on the total required torque and speed of vehicle 500, a digital twin model is used to simulate the driving situation of vehicle 500 under a certain input conditions of total required torque and speed, using different torque distribution ratios to obtain the total drive loss corresponding to different torque distribution ratios. The digital twin model then outputs the torque distribution ratio corresponding to the minimum total drive loss of vehicle 500 as the first torque distribution ratio.

[0095] For example, the total torque demand that vehicle 500 may have is {A1, A2, ..., An}, and the speed that vehicle 500 may have is {B1, B2, ..., Bn}.

[0096] Using a digital twin model, the input conditions of A1B1, A1B2, ..., A1Bn, A2B1, A2B2, ..., AnBn are simulated sequentially. The simulation calculates the total drive loss corresponding to the torque distribution ratio {C1, C2, ..., Cn} under different input conditions. The torque distribution ratio corresponding to the minimum total drive loss of vehicle 500 is taken as the first torque distribution ratio output, and a torque distribution ratio mapping relationship is constructed.

[0097] It should be noted that by using the digital twin model of Vehicle 500, the Vehicle 500 system is accurately simulated through digital means. During the simulation, high-precision, real-time data feedback is provided, and the simulation results of the total drive loss of Vehicle 500 corresponding to different torque distribution ratios are closer to the actual situation.

[0098] In some embodiments, the total drive loss of vehicle 500 is equal to the sum of the drive losses of each drive device 510 of vehicle 500. The digital twin model is used to simulate the drive loss of drive device 510 corresponding to different torque distribution ratios based on the current and voltage parameters, drive request torque and drive speed of drive device 510.

[0099] The current and voltage parameters of the drive device 510 include the current and voltage of the drive device 510. For example, if the drive device 510 is a motor, the current and voltage parameters include the motor bus voltage and the motor bus current.

[0100] The drive request torque of drive unit 510 refers to the torque required for drive unit 510 to rotate. Vehicle 500 may include at least two drive units 510, and the sum of the drive request torques of these drive units 510 is equal to the total required torque of vehicle 500.

[0101] In this embodiment, based on the total required torque and vehicle speed of the vehicle 500, and combined with the current and voltage parameters, drive requested torque and drive speed of the drive device 510, the actual drive loss of the drive device 510 under different torque distribution ratios can be calculated through a digital twin model, and the first torque distribution ratio with the minimum total drive loss can be obtained.

[0102] Taking the drive device 510 as an example, which is a motor.

[0103] The vehicle 500 includes two motors: one motor located at the front, referred to as the front motor, and the other motor located at the rear, referred to as the rear motor.

[0104] Based on the drive request torque Tq of the front motor MotFrt The drive speed of the front motor (MotSpd) Frt The motor bus voltage Volt of the front motor MotFrt The motor bus current Curr of the front motor MotFrt Calculate the actual drive loss P of the front motor under different torque distribution ratios. LossFrt .

[0105] For example, the actual drive loss P of the front motor under different torque distribution ratios. LossFrt As shown in Table 1.

[0106] Table 1

[0107] <![CDATA[MotSpd Frt1 ]]> <![CDATA[MotSpd Frt2 ]]> … <![CDATA[MotSpd Frtj ]]> <![CDATA[Tq MotFrt1 ]]> <![CDATA[P LossFrt 1-1]]> <![CDATA[P LossFrt 1-2]]> … <![CDATA[P LossFrt 1-j]]> <![CDATA[Tq MotFrt2 ]]> <![CDATA[P LossFrt 2-1]]> <![CDATA[P LossFrt 2-2]]> … <![CDATA[P LossFrt 2-j]]> … … … … … <![CDATA[Tq MotFrti ]]> <![CDATA[P LossFrt i-1]]> <![CDATA[P LossFrt i-2]]> … <![CDATA[P LossFrt i-j]]>

[0108] Based on the drive request torque Tq of the rear motor MotRe The drive speed of the rear motor (MotSpd) Re The motor bus voltage Volt of the rear motor MotRe The motor bus current Curr of the rear motor MotRe Calculate the actual drive loss P of the motor under different torque distribution ratios. LossRe .

[0109] The actual drive loss P of the rear motor under different torque distribution ratios LossRe As shown in Table 2.

[0110] Table 2

[0111] <![CDATA[MotSpd Re1 ]]> <![CDATA[MotSpd Re2 ]]> … <![CDATA[MotSpd Rej ]]> <![CDATA[Tq MotRe1 ]]> <![CDATA[P LossRe 1-1]]> <![CDATA[P LossRe 1-2]]> … <![CDATA[P LossRe 1-j]]> <![CDATA[Tq MotRe2 ]]> <![CDATA[P LossRe 2-1]]> <![CDATA[P LossRe 2-2]]> … <![CDATA[P LossRe 2-j]]> … … … … … <![CDATA[Tq MotRei ]]> <![CDATA[P LossRe i-1]]> <![CDATA[P LossRe i-2]]> … <![CDATA[P LossRe i-j]]>

[0112] In actual implementation, the drive loss of the motor can be calculated using the following formula:

[0113] P Loss =Volt*Curr / 1000 – Tq*N / 9550

[0114] Among them, P Loss The unit is kW, Volt is the motor bus voltage, Curr is the motor bus current, Tq is the drive torque demand, and N is the drive speed.

[0115] It is understandable that the total drive loss of vehicle 500 is the sum of the drive losses of each drive unit 510, that is, the total drive loss P of vehicle 500. LossTot =P LossFrt +P LossRe .

[0116] In some embodiments, the drive request torque of the drive unit 510 is determined based on the torque distribution ratio and the total required torque of the vehicle 500, and the drive speed of the drive unit 510 is determined based on the vehicle speed, tire radius and reduction ratio of the vehicle 500.

[0117] In actual operation, the total torque demand of vehicle 500 is allocated according to the torque distribution ratio. The torque allocated to a certain drive device 510 is the drive request torque of that drive device 510.

[0118] For example, the drive request torque Tq of the front motor MotFrt It can be calculated using the following formula:

[0119] Tq MotFrt =Tq Whl (1-η) / GearRatio Re

[0120] Among them, Tq Whl For total required torque, GearRatio Re η is the rear reduction ratio, and η is the torque distribution ratio.

[0121] In this embodiment, as shown in Table 3, by changing the torque distribution ratio, the drive request torque of the front motor and the drive request torque of the rear motor under different torque distribution ratios can be obtained.

[0122] It is understandable that the drive unit 510 is used to drive the wheels 520 to rotate. The drive speed refers to the speed at which the drive unit 510 rotates during operation. The vehicle speed of the vehicle 500 is related to the drive speed of the drive unit 510. The conversion between vehicle speed and drive speed can be realized according to parameters such as vehicle speed and tire size.

[0123] Table 3

[0124]

[0125] For example, the drive speed of the drive unit 510 can be calculated using the following formula:

[0126] WhlSpd=MotSpd*3.6*0.1047*TireRadius / GearRatio

[0127] Wherein, WhlSpd is the vehicle speed, TireRadius is the tire radius, GearRatio is the reduction ratio, and MotSpd is the drive speed of the drive unit 510.

[0128] In actual implementation, the digital twin model can simulate the drive loss of the drive device 510 corresponding to different torque distribution ratios based on the current and voltage parameters, drive request torque and drive speed of the drive device 510.

[0129] For example, the minimum drive loss of the drive unit 510 corresponding to different torque distribution ratios is shown in Table 4.

[0130] Table 4

[0131] <![CDATA[WhlSpd1]]> <![CDATA[WhlSpd2]]> … <![CDATA[WhlSpd j ]]> <![CDATA[Tq Whl1 ]]> <![CDATA[P LossTot 1-1]]> <![CDATA[P LossTot 1-2]]> … <![CDATA[P LossTot 1-j]]> <![CDATA[Tq Whl2 ]]> <![CDATA[P LossTot 2-1]]> <![CDATA[P LossTot 2-2]]> … <![CDATA[P LossTot 2-j]]> … … … … … <![CDATA[Tq Whli ]]> <![CDATA[P LossTot i-1]]> <![CDATA[P LossTot i-2]]> … <![CDATA[P LossTot i-j]]>

[0132] Different P values ​​can be obtained based on different torque distribution ratios. LossTot The lowest P LossTot The corresponding torque distribution ratio is the first torque distribution ratio. By integrating the first torque distribution ratios under different vehicle speeds and total torque demand, a torque distribution ratio mapping relationship is constructed.

[0133] For example, the torque distribution ratio mapping relationship is shown in Table 5.

[0134] Table 5

[0135] <![CDATA[WhlSpd1]]> <![CDATA[WhlSpd2]]> … <![CDATA[WhlSpd j ]]> <![CDATA[Tq Whl1 ]]> η1-1 η1-2 … η1-j <![CDATA[Tq Whl2 ]]> η2-1 η2-2 … η2-j … … … … … <![CDATA[Tq Whli ]]> ηi-1 ηi-2 … ηi-j

[0136] It should be noted that the vehicle data required for the digital twin model simulation includes, but is not limited to, data such as the bus voltage, bus current, actual torque, drive speed, reduction ratio, driving mode, vehicle speed, throttle opening signal, and tire radius of each motor.

[0137] In some embodiments, determining that the permissible driving power consumption of vehicle 500 is less than a target power consumption threshold includes:

[0138] Given that the current driving mode of vehicle 500 is economy mode, the allowable driving power consumption of vehicle 500 is determined to be less than the target power consumption threshold.

[0139] Understandably, the economy mode is a driving mode that reduces the vehicle's power consumption. When a driver sets the vehicle to economy mode, it indicates that the vehicle has low battery power or is highly sensitive to power consumption.

[0140] In this embodiment, when the driving mode currently set for the vehicle 500 is the economy mode (e.g., ECO), it is determined that the allowable driving power consumption of the vehicle 500 is less than the target power consumption threshold. At this time, torque is distributed according to the target torque distribution ratio found, thereby improving the efficiency and performance of the drive device 510 and achieving a more economical torque distribution.

[0141] In some embodiments, determining that the permissible driving power consumption of vehicle 500 is less than a target power consumption threshold includes:

[0142] Obtain historical driving data for vehicle 500;

[0143] If historical driving data meets the economic driving conditions, determine that the vehicle's permissible driving power consumption is less than the target power consumption threshold.

[0144] Among them, the historical driving data of vehicle 500 can include data such as accelerator pedal opening and vehicle speed.

[0145] Understandably, by statistically analyzing the historical driving data of vehicle 500, one can obtain the driver's driving habits and thus determine the driver's sensitivity to energy consumption.

[0146] In this embodiment, if the historical driving data meets the economic driving conditions, it is determined that the allowable driving power consumption of vehicle 500 is less than the target power consumption threshold. At this time, torque distribution is performed according to the found target torque distribution ratio to improve the efficiency and performance of drive device 510 and achieve a more economical torque distribution.

[0147] Among them, the economic driving conditions are pre-set conditions used to judge driving habits. For example, when the vehicle speed in historical driving data is in the economical and low power consumption speed range for a long time, it can be judged that the power consumption sensitivity is high, and the target torque distribution ratio can be used to distribute torque.

[0148] This application also provides a torque distribution method.

[0149] like Figure 2 As shown, the torque distribution method includes steps 210, 220 and 230.

[0150] Step 210: Obtain the current total torque demand and current speed of vehicle 500.

[0151] The total torque demand of vehicle 500 refers to the torque required to drive wheels 520 under certain driving conditions to achieve the expected power performance and driving status.

[0152] In this step, the current speed of vehicle 500 is obtained, and the current total torque demand of vehicle 500 is obtained.

[0153] It should be noted that the vehicle 500 includes at least two drive units 510, and the total torque required by the vehicle 500 is equal to the sum of the torques required by each drive unit 510.

[0154] Step 220: Based on the current total required torque and the current vehicle speed, perform a driving simulation on vehicle 500 to obtain the target torque distribution ratio that minimizes the current total drive loss of vehicle 500.

[0155] Understandably, the torque distribution ratio refers to the proportion of power distributed among the various drive units 510 or wheels 520 in the drive system of a vehicle 500, such as in a four-wheel drive vehicle 500 or a multi-axle drive vehicle 500. It is very important for the handling, stability and power performance of the vehicle 500.

[0156] For example, a four-wheel drive vehicle 500 may include three motors: one on the front axle and two on the rear axle. When driving on dry roads, 60% of the torque can be distributed to the rear axle and 40% to the front axle. When driving on wet roads, more torque can be distributed to the front axle to increase traction.

[0157] Among them, the total torque demand of vehicle 500 is equal to the sum of the torque demand of each drive unit 510, and the total drive loss of vehicle 500 is equal to the sum of the drive losses of each drive unit 510.

[0158] In this step, based on the current total required torque and the current vehicle speed, the driving loss generated by the drive unit 510 of the simulated vehicle 500 when the vehicle 500 distributes torque according to different torque distribution ratios is taken as the target torque distribution ratio corresponding to the current total required torque and the current vehicle speed.

[0159] It is understandable that by distributing torque according to the target torque distribution ratio that minimizes the total drive loss of vehicle 500, the efficiency and performance of drive unit 510 can be effectively improved, which helps to increase the driving range of vehicle 500.

[0160] Step 230: If the permissible driving power consumption of vehicle 500 is determined to be less than the target power consumption threshold, the torque of vehicle 500 is distributed according to the target torque distribution ratio.

[0161] Among them, the permissible driving power consumption of vehicle 500 refers to the amount of electricity that the drive unit 510 is allowed to consume during the driving process of vehicle 500.

[0162] It should be noted that the target energy consumption threshold can be a pre-set energy threshold used to judge the vehicle's energy level or energy consumption sensitivity.

[0163] If the permissible driving power consumption of vehicle 500 is less than the target power consumption threshold, it indicates that vehicle 500 has low power or high power consumption sensitivity. By distributing torque to vehicle 500 through the target torque distribution ratio, the efficiency and performance of drive unit 510 can be effectively improved, achieving a more economical torque distribution and helping to increase the driving range of vehicle 500.

[0164] Understandably, if the permissible driving power consumption of vehicle 500 is greater than or equal to the target power consumption threshold, it indicates that vehicle 500 has a large amount of power or low power consumption sensitivity. In this case, the target torque distribution ratio can be used to distribute torque to vehicle 500.

[0165] In actual implementation, the relationship between the allowable driving power consumption of vehicle 500 and the target power consumption threshold can be determined based on the driving mode, driving habits, or user parameter settings of vehicle 500. For vehicle 500 with low power or high power consumption sensitivity, the target torque distribution ratio can be found from the torque distribution ratio mapping relationship to distribute torque, thereby improving the efficiency and performance of drive unit 510, achieving more economical torque distribution, and helping to increase the driving range of vehicle 500.

[0166] According to the torque distribution method provided in this application embodiment, the current total torque demand of vehicle 500 and the current vehicle speed are simulated in real time to obtain the target torque distribution ratio that minimizes the total drive loss of vehicle 500. For vehicle 500 with low battery or high power consumption sensitivity, the target torque distribution ratio is used to distribute torque, which effectively improves the efficiency and performance of drive device 510, achieves more economical torque distribution, effectively reduces the system energy consumption of vehicle 500, and helps to increase the driving range of vehicle 500.

[0167] In some embodiments, step 220, performing a driving simulation on vehicle 500 based on the current total required torque and the current vehicle speed to obtain a target torque distribution ratio that minimizes the current total drive loss of vehicle 500, may include:

[0168] Based on the current total torque demand and the current vehicle speed, a simulation is performed using a digital twin model of vehicle 500 to obtain the total drive loss of vehicle 500 corresponding to different torque distribution ratios output by the digital twin model.

[0169] The torque distribution ratio corresponding to the minimum total drive loss of vehicle 500 is taken as the target torque distribution ratio.

[0170] The digital twin model of vehicle 500 is a virtual model that can reflect the entire life cycle of vehicle 500. It can be constructed using actual vehicle 500 data, driven by the digital twin model, to realize the processing and analysis of dynamic data and simulate the driving process of vehicle 500.

[0171] In this embodiment, based on the current total torque demand and current speed of vehicle 500, a digital twin model is used to simulate the driving situation of vehicle 500 under the input conditions of current total torque demand and current speed, using different torque distribution ratios to obtain the total drive loss corresponding to different torque distribution ratios. The digital twin model then outputs the torque distribution ratio corresponding to the minimum total drive loss of vehicle 500 as the target torque distribution ratio.

[0172] It should be noted that by using the digital twin model of Vehicle 500, the Vehicle 500 system is accurately simulated through digital means. During the simulation, high-precision, real-time data feedback is provided, and the simulation results of the total drive loss of Vehicle 500 corresponding to different torque distribution ratios are closer to the actual situation.

[0173] In some embodiments, the total drive loss of vehicle 500 is equal to the sum of the drive losses of each drive device 510 of vehicle 500. The digital twin model is used to simulate the drive loss of drive device 510 corresponding to different torque distribution ratios based on the current and voltage parameters, drive request torque and drive speed of drive device 510.

[0174] In some embodiments, the drive request torque of the drive unit 510 is determined based on the torque distribution ratio and the total required torque of the vehicle 500, and the drive speed of the drive unit 510 is determined based on the vehicle speed, tire radius and reduction ratio of the vehicle 500.

[0175] In some embodiments, determining that the permissible driving power consumption of vehicle 500 is less than a target power consumption threshold includes:

[0176] Given that the current driving mode of vehicle 500 is economy mode, the allowable driving power consumption of vehicle 500 is determined to be less than the target power consumption threshold.

[0177] In some embodiments, determining that the permissible driving power consumption of vehicle 500 is less than a target power consumption threshold includes:

[0178] Obtain historical driving data for vehicle 500;

[0179] If historical driving data meets the economic driving conditions, determine that the vehicle's permissible driving power consumption is less than the target power consumption threshold.

[0180] This application also provides a torque distribution device.

[0181] like Figure 3 As shown, the torque distribution device includes:

[0182] The first acquisition module 310 is used to acquire the current total torque demand and current speed of vehicle 500;

[0183] The first processing module 320 is used to search in the torque distribution ratio mapping relationship based on the current total demand torque and the current vehicle speed to obtain the target torque distribution ratio of vehicle 500.

[0184] The second processing module 330 is used to distribute torque to the vehicle 500 according to the target torque distribution ratio when it is determined that the allowable driving power consumption of the vehicle 500 is less than the target power consumption threshold.

[0185] Among them, the torque distribution ratio mapping relationship is used to characterize the correspondence between total demand torque, vehicle speed and first torque distribution ratio. The first torque distribution ratio is the torque distribution ratio that minimizes the total drive loss of vehicle 500, obtained by driving simulation based on the total demand torque and vehicle speed of vehicle 500.

[0186] According to the torque distribution device provided in the embodiments of this application, by searching in the torque distribution ratio mapping relationship based on the current total torque demand and current vehicle speed of the vehicle 500, a target torque distribution ratio that minimizes the total drive loss of the vehicle 500 is obtained. For the vehicle 500 with low battery power or high power consumption sensitivity, the target torque distribution ratio is used for torque distribution, which effectively improves the efficiency and performance of the drive device 510, achieves a more economical torque distribution, can effectively reduce the system energy consumption of the vehicle 500, and helps to increase the driving range of the vehicle 500.

[0187] In some embodiments, the first torque distribution ratio is determined by the following steps:

[0188] Based on the total required torque and speed of vehicle 500, a simulation is performed using a digital twin model of vehicle 500 to obtain the total drive loss of vehicle 500 corresponding to different torque distribution ratios output by the digital twin model.

[0189] The torque distribution ratio corresponding to the minimum total drive loss of vehicle 500 is taken as the first torque distribution ratio.

[0190] In some embodiments, the total drive loss of vehicle 500 is equal to the sum of the drive losses of each drive device 510 of vehicle 500. The digital twin model is used to simulate the drive loss of drive device 510 corresponding to different torque distribution ratios based on the current and voltage parameters, drive request torque and drive speed of drive device 510.

[0191] In some embodiments, the drive request torque of the drive unit 510 is determined based on the torque distribution ratio and the total required torque of the vehicle 500, and the drive speed of the drive unit 510 is determined based on the vehicle speed, tire radius and reduction ratio of the vehicle 500.

[0192] In some embodiments, the second processing module 330 is configured to determine that the permissible driving power consumption of the vehicle 500 is less than a target power consumption threshold, including:

[0193] Given that the current driving mode of vehicle 500 is economy mode, the allowable driving power consumption of vehicle 500 is determined to be less than the target power consumption threshold.

[0194] In some embodiments, the second processing module 330 is configured to determine that the permissible driving power consumption of the vehicle 500 is less than a target power consumption threshold, including:

[0195] Obtain historical driving data for vehicle 500;

[0196] If historical driving data meets the economic driving conditions, determine that the vehicle's permissible driving power consumption is less than the target power consumption threshold.

[0197] The torque distribution device in the embodiments of this application can be an electronic device or a component in an electronic device, such as an integrated circuit or a chip.

[0198] The torque distribution device provided in this application embodiment can realize the various processes implemented in the above torque distribution method embodiment, and will not be described again here to avoid repetition.

[0199] This application also provides a torque distribution device.

[0200] like Figure 4 As shown, the torque distribution device includes:

[0201] The second acquisition module 410 is used to acquire the current total required torque and current vehicle speed of vehicle 500;

[0202] The third processing module 420 is used to perform driving simulation on vehicle 500 based on the current total demand torque and the current vehicle speed, and obtain the target torque distribution ratio that minimizes the current total drive loss of vehicle 500.

[0203] The fourth processing module 430 is used to distribute torque to the vehicle 500 according to the target torque distribution ratio when it is determined that the allowable driving power consumption of the vehicle 500 is less than the target power consumption threshold.

[0204] According to the torque distribution device provided in the embodiments of this application, the current total required torque and current speed of vehicle 500 are simulated in real time to obtain the target torque distribution ratio that minimizes the total drive loss of vehicle 500. For vehicle 500 with low battery or high power consumption sensitivity, the target torque distribution ratio is used to distribute torque, which effectively improves the efficiency and performance of drive device 510, achieves more economical torque distribution, effectively reduces the system energy consumption of vehicle 500, and helps to increase the driving range of vehicle 500.

[0205] In some embodiments, the third processing module 420 is configured to perform driving simulation on the vehicle 500 based on the current total demand torque and the current vehicle speed, to obtain a target torque distribution ratio that minimizes the current total drive loss of the vehicle 500, including:

[0206] Based on the current total torque demand and the current vehicle speed, a simulation is performed using a digital twin model of vehicle 500 to obtain the total drive loss of vehicle 500 corresponding to different torque distribution ratios output by the digital twin model.

[0207] The torque distribution ratio corresponding to the minimum total drive loss of vehicle 500 is taken as the target torque distribution ratio.

[0208] In some embodiments, the total drive loss of vehicle 500 is equal to the sum of the drive losses of each drive device 510 of vehicle 500. The digital twin model is used to simulate the drive loss of drive device 510 corresponding to different torque distribution ratios based on the current and voltage parameters, drive request torque and drive speed of drive device 510.

[0209] In some embodiments, the drive request torque of the drive unit 510 is determined based on the torque distribution ratio and the total required torque of the vehicle 500, and the drive speed of the drive unit 510 is determined based on the vehicle speed, tire radius and reduction ratio of the vehicle 500.

[0210] In some embodiments, the fourth processing module 430 is configured to determine that the permissible driving power consumption of the vehicle 500 is less than a target power consumption threshold, including:

[0211] Given that the current driving mode of vehicle 500 is economy mode, the allowable driving power consumption of vehicle 500 is determined to be less than the target power consumption threshold.

[0212] In some embodiments, the fourth processing module 430 is configured to determine that the permissible driving power consumption of the vehicle 500 is less than a target power consumption threshold, including:

[0213] Obtain historical driving data for vehicle 500;

[0214] If historical driving data meets the economic driving conditions, determine that the vehicle's permissible driving power consumption is less than the target power consumption threshold.

[0215] The torque distribution device in the embodiments of this application can be an electronic device or a component in an electronic device, such as an integrated circuit or a chip.

[0216] The torque distribution device provided in this application embodiment can realize the various processes implemented in the above torque distribution method embodiment, and will not be described again here to avoid repetition.

[0217] This application also provides a vehicle 500.

[0218] like Figure 5 As shown, the vehicle 500 includes at least two drive units 510, which are used to convert electrical energy into mechanical energy to drive the vehicle 500 to start and move. For example, the drive unit 510 can be an electric motor.

[0219] The vehicle 500 also includes any of the torque distribution devices described above, the torque distribution device being connected to at least two drive units 510, the torque distribution device being used to distribute the torque of the at least two drive units 510.

[0220] According to the vehicle 500 provided in the embodiments of this application, the target torque distribution ratio that minimizes the total drive loss of the vehicle 500 is obtained by using the current total required torque and the current vehicle speed of the vehicle 500. For the vehicle 500 with low battery power or high power consumption sensitivity, the target torque distribution ratio is used to distribute torque, which effectively improves the efficiency and performance of the drive device 510, achieves a more economical torque distribution, can effectively reduce the system energy consumption of the vehicle 500, and helps to increase the driving range of the vehicle 500.

[0221] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0222] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0223] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0224] In some embodiments, such as Figure 6 As shown, this application embodiment also provides an electronic device 600, including a processor 601, a memory 602, and a computer program stored in the memory 602 and executable on the processor 601. When the program is executed by the processor 601, it implements the various processes of the above-described torque distribution method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0225] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0226] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described torque distribution method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0227] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0228] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described torque distribution method.

[0229] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0230] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above torque distribution method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0231] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0232] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0233] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0234] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0235] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0236] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A torque distribution method, characterized in that, include: Obtain the vehicle's current total torque demand and current speed; Based on the current total torque demand and the current vehicle speed, the target torque distribution ratio of the vehicle is obtained by searching in the torque distribution ratio mapping relationship. If it is determined that the vehicle's permissible driving power consumption is less than the target power consumption threshold, then the torque is distributed to the vehicle according to the target torque distribution ratio; The torque distribution ratio mapping relationship is used to characterize the correspondence between total demand torque, vehicle speed and first torque distribution ratio. The first torque distribution ratio is the torque distribution ratio that minimizes the total drive loss of the vehicle, obtained by driving simulation based on the total demand torque and vehicle speed of the vehicle.

2. The torque distribution method according to claim 1, characterized in that, The first torque distribution ratio is determined through the following steps: Based on the total required torque and vehicle speed of the vehicle, a simulation is performed using the digital twin model of the vehicle to obtain the total drive loss of the vehicle corresponding to different torque distribution ratios output by the digital twin model. The torque distribution ratio corresponding to the minimum total drive loss of the vehicle is taken as the first torque distribution ratio.

3. The torque distribution method according to claim 2, characterized in that, The total drive loss of the vehicle is equal to the sum of the drive losses of each drive device of the vehicle. The digital twin model is used to simulate the drive loss of the drive device corresponding to different torque distribution ratios based on the current and voltage parameters, drive requested torque and drive speed of the drive device.

4. The torque distribution method according to claim 3, characterized in that, The drive request torque of the drive unit is determined based on the torque distribution ratio and the total torque demand of the vehicle, and the drive speed of the drive unit is determined based on the vehicle speed, tire radius and reduction ratio.

5. The torque distribution method according to any one of claims 1-4, characterized in that, Determining that the vehicle's permissible driving power consumption is less than the target power consumption threshold includes: When the vehicle's current driving mode is economy mode, it is determined that the vehicle's permissible driving power consumption is less than the target power consumption threshold.

6. The torque distribution method according to any one of claims 1-4, characterized in that, Determining that the vehicle's permissible driving power consumption is less than the target power consumption threshold includes: Obtain the historical driving data of the vehicle; If the historical driving data meets the economic driving conditions, it is determined that the vehicle's allowable driving power consumption is less than the target power consumption threshold.

7. A torque distribution method, characterized in that, include: Obtain the vehicle's current total torque demand and current speed; Based on the current total required torque and the current vehicle speed, a driving simulation is performed on the vehicle to obtain the target torque distribution ratio that minimizes the current total drive loss of the vehicle. If it is determined that the vehicle's permissible driving power consumption is less than the target power consumption threshold, the torque is distributed to the vehicle according to the target torque distribution ratio.

8. A torque distribution device, characterized in that, include: The first acquisition module is used to acquire the vehicle's current total torque demand and current vehicle speed; The first processing module is used to search in the torque distribution ratio mapping relationship based on the current total demand torque and the current vehicle speed to obtain the target torque distribution ratio of the vehicle; The second processing module is used to distribute torque to the vehicle according to the target torque distribution ratio when it is determined that the vehicle's allowable driving power consumption is less than the target power consumption threshold. The torque distribution ratio mapping relationship is used to characterize the correspondence between total demand torque, vehicle speed and first torque distribution ratio. The first torque distribution ratio is the torque distribution ratio that minimizes the total drive loss of the vehicle, obtained by driving simulation based on the total demand torque and vehicle speed of the vehicle.

9. A torque distribution device, characterized in that, include: The second acquisition module is used to acquire the vehicle's current total torque demand and current vehicle speed; The third processing module is used to perform driving simulation on the vehicle based on the current total demand torque and the current vehicle speed, and obtain the target torque distribution ratio that minimizes the current total drive loss of the vehicle. The fourth processing module is used to distribute torque to the vehicle according to the target torque distribution ratio when it is determined that the vehicle's permissible driving power consumption is less than the target power consumption threshold.

10. A vehicle, characterized in that, include: At least two drive units; The torque distribution device as described in claim 8 or 9, wherein the torque distribution device is connected to the at least two drive devices, and the torque distribution device is used to distribute the torque of the at least two drive devices.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the torque distribution method as described in any one of claims 1-7.

12. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the torque distribution method as described in any one of claims 1-7.

13. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the torque distribution method as described in any one of claims 1-7.

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