A torque distribution method, device, equipment and medium of a dual electric drive axle vehicle

Abstract

The application discloses a torque distribution method, device, equipment and medium of a double electric drive axle vehicle. The method comprises the following steps: acquiring performance parameter information corresponding to a front electric drive axle and a rear electric drive axle; determining torque high-efficiency interval parameters corresponding to the front electric drive axle and the rear electric drive axle respectively through a preset electric drive axle torque bench test; acquiring a driver demand torque; and determining distribution torques corresponding to the front electric drive axle and the rear electric drive axle respectively based on the driver demand torque, the performance parameter information, the torque high-efficiency interval parameters and a torque distribution rule. According to the application, the performance parameter information corresponding to the front electric drive axle and the rear electric drive axle, the torque high-efficiency interval parameters and the torque distribution rule are used to determine the distribution torques required to be distributed on the front electric drive axle and the rear electric drive axle respectively, so that the reasonable distribution of the driving torques of the double electric drive axles can be realized without reducing the driver demand torque, the driving efficiency of each electric drive axle is improved, and the economy of the vehicle is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle axle torque distribution technology, and more particularly to a torque distribution method, apparatus, device, and medium for a dual-electric-drive axle vehicle. Background Technology

[0002] With the development of vehicle electrification, electric drive axles, as one of the important forms of distributed drive, are appearing more and more frequently in electric vehicles. Vehicles with dual electric drive axles, unlike traditional vehicles, do not have a mechanical driveshaft connection between the front and rear axles. Therefore, there is no torque coupling between the front and rear axles, and the torque on each axle can be controlled independently.

[0003] In existing technologies, torque distribution strategies for vehicles typically employ proportional or average allocation methods. These methods often result in irrational torque distribution and low driving efficiency for each electric drive axle, leading to extremely poor vehicle fuel economy. Therefore, for vehicles with dual electric drive axles, a torque distribution method is urgently needed to rationally distribute driving torque, which is crucial for improving vehicle fuel economy. Summary of the Invention

[0004] In view of this, the present invention provides a torque distribution method, device, equipment and medium for a dual electric drive axle vehicle, which can, without exceeding the upper limit of performance parameter information, ensure that the torque distributed to each axle falls within its respective high-efficiency range as much as possible, thereby achieving a reasonable distribution of driving torque of the dual electric drive axles without reducing the torque required by the driver, improving the driving efficiency of each electric drive axle, and thus improving the vehicle's economy.

[0005] According to one aspect of the present invention, an embodiment of the present invention provides a torque distribution method for a dual-electric drive axle vehicle, applied to a vehicle comprising: a front electric drive axle and a rear electric drive axle; the torque distribution method comprising:

[0006] Obtain the performance parameter information corresponding to the front electric drive bridge and the rear electric drive bridge respectively;

[0007] The torque efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle were determined by a preset electric drive axle torque bench test.

[0008] The required torque for the driver is obtained, and the allocated torque on the front electric drive axle and the rear electric drive axle is determined based on the required torque for the driver, the performance parameter information, the torque efficiency range parameter and the pre-configured torque allocation rule.

[0009] The principle of the torque distribution rule is that the torque distributed to the front electric drive axle and the rear electric drive axle is within their respective torque efficiency range parameters.

[0010] According to another aspect of the present invention, embodiments of the present invention also provide a torque distribution device for a dual-electric drive axle vehicle, comprising:

[0011] The first information acquisition module is used to acquire the performance parameter information corresponding to the front electric drive bridge and the rear electric drive bridge.

[0012] The second information acquisition module is used to determine the torque high-efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle respectively through a preset electric drive axle torque bench test;

[0013] The torque distribution module is used to obtain the torque required by the driver, and determine the corresponding distributed torque on the front electric drive axle and the rear electric drive axle based on the torque required by the driver, the performance parameter information, the torque high efficiency range parameter and the pre-configured torque distribution rules.

[0014] The principle of the torque distribution rule is that the torque distributed to the front electric drive axle and the rear electric drive axle is within their respective torque efficiency range parameters.

[0015] According to another aspect of the present invention, embodiments of the present invention also provide a torque distribution device for a dual-electric drive axle vehicle, the torque distribution device for the dual-electric drive axle vehicle comprising:

[0016] At least one processor; and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the torque distribution method for a dual-electric drive axle vehicle according to any embodiment of the present invention.

[0019] According to another aspect of the present invention, embodiments of the present invention also provide a computer-readable storage medium storing computer instructions for causing a processor to execute and implement the torque distribution method for a dual-electric drive axle vehicle according to any embodiment of the present invention.

[0020] The technical solution of this invention determines the torque to be allocated to the front and rear electric drive axles by using the performance parameter information, torque efficiency range parameters, and pre-configured torque distribution rules corresponding to the front and rear electric drive axles. This allows the torque allocated to each axle to fall within its respective efficiency range as much as possible without exceeding the upper limit of the performance parameter information. This achieves a reasonable distribution of the driving torque of the dual electric drive axles without reducing the torque required by the driver, thereby improving the driving efficiency of each electric drive axle and ultimately improving the vehicle's economy.

[0021] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A flowchart illustrating a torque distribution method for a dual-electric drive axle vehicle according to an embodiment of the present invention;

[0024] Figure 2 A flowchart illustrating another torque distribution method for a dual-electric drive axle vehicle according to an embodiment of the present invention;

[0025] Figure 3 This is a structural block diagram of a torque distribution device for a dual-electric drive axle vehicle according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the torque distribution device for a dual-electric drive axle vehicle provided in an embodiment of the present invention. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] In one embodiment, Figure 1 This is a flowchart of a torque distribution method for a dual-electric drive axle vehicle according to an embodiment of the present invention. This embodiment is applicable to situations where the torque of a dual-electric drive axle vehicle is reasonably distributed. The method can be executed by a torque distribution device of the dual-electric drive axle vehicle. The torque distribution system of the dual-electric drive axle vehicle can be implemented in hardware and / or software. The torque distribution system of the dual-electric drive axle vehicle can be configured in the torque distribution equipment of the dual-electric drive axle vehicle.

[0030] like Figure 1 As shown, the torque distribution method for a dual-electric drive axle vehicle in this embodiment is applied to a vehicle including a front electric drive axle and a rear electric drive axle; the specific steps of the torque distribution method include:

[0031] S110: Obtain the performance parameter information corresponding to the front electric drive bridge and the rear electric drive bridge respectively.

[0032] The performance parameters, also known as upper and lower torque limits, refer to the maximum and minimum torque values ​​specified by the electric drive axle manufacturer during production. The front and rear electric drive axles each have their own corresponding maximum and minimum torque values. This can be understood as the front electric drive axle having its own maximum and minimum torque values, and the rear electric drive axle having its own maximum and minimum torque values. It should be noted that the upper and lower torque limits for the front and rear electric drive axles are generally parameters with the same absolute value.

[0033] In one embodiment, the performance parameter information includes: a first torque upper limit value corresponding to the front electric drive axle, and a second torque upper limit value corresponding to the rear electric drive axle; wherein, the first torque upper limit value refers to the maximum torque value of the corresponding front electric drive axle; and the second torque upper limit value refers to the maximum torque value of the corresponding rear electric drive axle.

[0034] In this embodiment, the performance parameter information corresponding to the front electric drive axle and the rear electric drive axle is the standard performance parameter information set by the electric drive axle equipment manufacturer after the electric drive axle is manufactured. The first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle can be directly obtained through the electric drive axle controller. In some embodiments, the stored performance parameter information can also be read through other methods, which is not limited in this embodiment.

[0035] S120. Determine the torque efficiency range parameters for the front and rear electric drive axles respectively through a preset electric drive axle torque bench test.

[0036] The preset electric drive axle torque bench test can be understood as a torque bench for electric drive axles constructed by the user according to their needs, in order to conduct required experiments. In this embodiment, the main parameters of the electric axle test bench may include, but are not limited to, speed measurement accuracy, speed control accuracy, differential control accuracy, torque measurement accuracy, torque control accuracy, and temperature control accuracy.

[0037] In this embodiment, the torque efficiency range parameter refers to the efficiency range within the torque operating range of the electric drive axle. This torque efficiency range has upper and lower limits. The torque efficiency range parameter includes: the upper and lower limits of the torque efficiency range for the front electric drive axle, and the upper and lower limits of the torque efficiency range for the rear electric drive axle. Specifically, the upper limit of the torque efficiency range for the front electric drive axle refers to the upper limit of the efficiency range corresponding to the front electric drive axle operating within a certain torque range; the upper limit of the torque efficiency range for the rear electric drive axle refers to the upper limit of the efficiency range corresponding to the rear electric drive axle operating within a certain torque range; the lower limit of the torque efficiency range for the front electric drive axle refers to the lower limit of the efficiency range corresponding to the front electric drive axle operating within a certain torque range; the interpretation of the lower limit of the torque efficiency range for the rear electric drive axle is similar.

[0038] In this embodiment, the torque efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle can be obtained by simulating the test conditions under different working conditions in the electric drive axle torque bench test. In other embodiments, the torque efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle can also be obtained by other methods in the prior art. This embodiment does not impose any restrictions on these methods.

[0039] S130: Obtain the torque required by the driver, and determine the corresponding torque distribution on the front electric drive axle and the rear electric drive axle based on the torque required by the driver, performance parameter information, torque efficiency range parameters and pre-configured torque distribution rules.

[0040] The principle of the torque distribution rule is that the torque distributed to the front electric drive axle and the rear electric drive axle is within their respective torque efficiency range parameters.

[0041] The driver's required torque can be understood as the target torque obtained by pressing the accelerator pedal and considering the vehicle's own state; this target torque is the torque the driver expects. In this embodiment, the driver's required torque is related to parameters such as vehicle speed and temperature. For example, before the vehicle enters forward gear after power-on, it defaults to a dual-axle drive mode, and both axles of the dual-axle electric drive axle are already in gear. The driver's required torque is obtained based on the depth to which the driver presses the accelerator pedal.

[0042] In one embodiment, the pre-configured torque distribution rules are formulated by the user based on the principle of ensuring that the torque distributed to each axle falls within its respective efficient range, without exceeding the torque upper limit of each electric drive axle. In this embodiment, the torque distribution rules include a first distribution rule, a second distribution rule, a third distribution rule, a fourth distribution rule, and a fifth distribution rule. Accordingly, the first distribution rule includes: when the driver's required torque is greater than or equal to the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, the torque distributed on the front electric drive axle is determined to be the first torque upper limit value, and the torque distributed on the rear electric drive axle is determined to be the second torque upper limit value. The second distribution rule includes: when the driver's required torque is less than the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle... The first allocation rule is as follows: when the sum of the upper limits of the torque, and the driver's required torque is greater than or equal to the sum of the upper limits of the high-efficiency torque range of the front electric drive axle and the upper limits of the high-efficiency torque range of the rear electric drive axle, the torque allocated to the front electric drive axle is determined to be the upper limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the upper limit of the high-efficiency torque range of the front electric drive axle; the second allocation rule is as follows: when the driver's required torque is less than the sum of the upper limits of the high-efficiency torque range of the front electric drive axle and the upper limits of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the lower limits of the high-efficiency torque range of the front electric drive axle and the lower limits of the high-efficiency torque range of the rear electric drive axle, the torque allocated to the front electric drive axle is determined to be the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the front electric drive axle.

[0043] In this embodiment, the fourth allocation rule includes: when the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the first condition, if the lower limit of the high-efficiency torque range of the front electric drive axle in the first condition is the minimum high-efficiency torque range lower limit, then the torque allocated to the front electric drive axle is determined to be the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle; if the lower limit of the high-efficiency torque range of the rear electric drive axle in the first condition is the minimum high-efficiency torque range lower limit, then the torque allocated to the front electric drive axle is determined to be the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque allocated to the rear electric drive axle is the lower limit of the high-efficiency torque range of the rear electric drive axle; wherein, the first condition is expressed as: Min(lower limit of the high-efficiency torque range of the front electric drive axle, lower limit of the high-efficiency torque range of the rear electric drive axle), Min(lower limit of the high-efficiency torque range of the front electric drive axle). The lower limit of the high-efficiency torque range of the rear electric drive axle is represented as the minimum lower limit of the high-efficiency torque range between the lower limits of the high-efficiency torque ranges of the front and rear electric drive axles. Specifically, when the driver's required torque is less than the sum of the lower limits of the high-efficiency torque ranges of the front and rear electric drive axles, and the driver's required torque is greater than or equal to the lower limit of the high-efficiency torque range of the front electric drive axle, the torque allocated to the front electric drive axle is determined to be the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle. When the driver's required torque is less than the sum of the lower limits of the high-efficiency torque ranges of the front and rear electric drive axles, and the driver's required torque is greater than or equal to the lower limit of the high-efficiency torque range of the rear electric drive axle, the torque allocated to the front electric drive axle is determined to be the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque allocated to the rear electric drive axle is determined to be the lower limit of the high-efficiency torque range of the rear electric drive axle.

[0044] In this embodiment, the fifth allocation rule includes: when the driver's required torque is less than any of the lower limits in the second condition, the torque allocated to the front electric drive axle and the torque allocated to the rear electric drive axle are both (driver's required torque) / 2; wherein, the second condition is expressed as: Min(lower limit of the high-efficiency range of the front electric drive axle torque, lower limit of the high-efficiency range of the rear electric drive axle torque).

[0045] In this embodiment, the driver's required torque, the first and second upper torque limits in the performance parameter information, and the upper, lower, and rear electric drive axle torque efficiency range limits in the torque efficiency range parameters can be compared. The comparison results, along with pre-configured torque distribution rules, determine the corresponding allocated torque on the front and rear electric drive axles. Specifically, the first and second upper torque limits in the performance parameter information, and the upper, lower, and rear electric drive axle torque efficiency range limits in the torque efficiency range parameters can be sorted sequentially, for example, starting from the maximum value, to obtain a sorting result. Then, the driver's required torque is compared according to the sorting result with the first and second upper torque limits in the performance parameter information, and the upper, lower, and rear electric drive axle torque efficiency range limits in the torque efficiency range parameters to obtain a comparison result. This can be understood as follows: First, the driver's required torque is compared with the sum of the first and second torque upper limits. Then, based on this, the upper limits of the torque efficiency range of the front electric drive axle and the rear electric drive axle are determined. Next, the driver's required torque is compared with the sum of the first and second torque upper limits. Finally, it is compared with the lower limit of the torque efficiency range of the front electric drive axle to obtain the corresponding comparison results.

[0046] In other embodiments, an electric drive axle test bench can be constructed, and under test conditions of a certain vehicle speed and driver-demanded torque, different torque distribution ratios of the dual-axle electric drive axle can be set to perform simulation iteration calculations on the constructed electric drive axle test bench. The distribution ratio that makes the system optimal can be selected as the optimal dual-axle electric drive axle torque distribution ratio corresponding to that vehicle speed and driver-demanded torque. In some embodiments, the linear motor of the vehicle can be controlled to push the friction plate of the vehicle's clutch based on the torque demand value to obtain the control result. Based on the control result, the actual torque value of the vehicle is determined, and the actual torque value is distributed to the front axle and the rear axle of the vehicle respectively.

[0047] The technical solution of this invention determines the torque to be allocated to the front and rear electric drive axles by using the performance parameter information, torque efficiency range parameters, and pre-configured torque distribution rules corresponding to the front and rear electric drive axles. This allows the torque allocated to each axle to fall within its respective efficiency range as much as possible without exceeding the upper limit of the performance parameter information. This achieves a reasonable distribution of the driving torque of the dual electric drive axles without reducing the torque required by the driver, thereby improving the driving efficiency of each electric drive axle and ultimately improving the vehicle's economy.

[0048] In one embodiment, Figure 2 This is a flowchart of another torque distribution method for a dual-electric drive axle vehicle provided in an embodiment of the present invention. Based on the above embodiments, this embodiment further refines the following steps: obtaining the performance parameter information corresponding to the front electric drive axle and the rear electric drive axle; determining the torque efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle respectively through a preset electric drive axle torque bench test; and determining the corresponding distributed torque on the front electric drive axle and the rear electric drive axle based on the driver's required torque, performance parameter information, torque efficiency range parameters, and pre-configured torque distribution rules.

[0049] like Figure 2 As shown, the torque distribution method for the dual-electric drive axle vehicle in this embodiment may specifically include the following steps:

[0050] S210. Obtain the first torque upper limit value corresponding to the front electric drive axle through the first electric drive axle controller.

[0051] Among them, the first torque upper limit value is the maximum torque upper limit parameter of the front electric drive axle corresponding to the front electric drive axle.

[0052] In this embodiment, the first electric drive axle controller is connected to the front electric drive axle, and the maximum torque limit parameter of the front electric drive axle can be obtained through the first electric drive axle controller. In this embodiment, the maximum torque limit of the front electric drive axle can be defined as Torque_Max_Front.

[0053] S220: Obtain the second torque upper limit value corresponding to the rear electric drive axle through the second electric drive axle controller.

[0054] Among them, the second torque upper limit value is the maximum torque upper limit parameter of the rear electric drive axle corresponding to the rear electric drive axle.

[0055] In this embodiment, the second electric drive axle controller is connected to the rear electric drive axle, and the maximum torque limit parameter of the rear electric drive axle corresponding to the front and rear drive axles can be obtained through the second electric drive axle controller. In this embodiment, the maximum torque limit of the rear electric drive axle can be defined as Torque_Max_Rear.

[0056] S230, The first torque upper limit value and the first torque upper limit value are used as the performance parameter information corresponding to the front electric drive axle and the rear electric drive axle respectively.

[0057] In this embodiment, the maximum torque limit parameter of the front electric drive axle corresponding to the front electric drive axle and the maximum torque limit parameter of the rear electric drive axle corresponding to the rear electric drive axle are used to form the performance parameter information of the front electric drive axle and the rear electric drive axle.

[0058] S240. Test the torque of the electric drive axle on the preset electric drive axle torque bench test according to the preset test conditions under different working conditions, so as to obtain the torque high efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle respectively.

[0059] Among them, the preset different operating conditions include at least: low speed and high torque, high speed and low torque, periodic alternating operation and non-periodic alternating operation.

[0060] In this embodiment, under different operating conditions such as low speed and high torque, high speed and low torque, periodic alternating operation, and non-periodic alternating operation, the torque of the electric drive axle can be tested on a preset electric drive axle torque bench test to obtain the upper limit, lower limit, and upper and lower limits of the high-efficiency torque range for the front and rear electric drive axles, respectively. In this embodiment, the preset electric drive axle torque bench test is a torque bench test in the prior art, and will not be described in detail here.

[0061] S250, determine the sum of the first torque upper limit and the second torque upper limit in the performance parameter information, the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle in the torque efficiency range parameters, and the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle in the torque efficiency range parameters.

[0062] In this embodiment, it is necessary to determine the sum of the first torque upper limit and the second torque upper limit in the performance parameter information, the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle in the torque efficiency range parameters, and the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle in the torque efficiency range parameters.

[0063] S260. Select the lower limit of the high-efficiency torque range between the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle.

[0064] Among them, the lower limit of the minimum torque high-efficiency range is one of the lower limit of the torque high-efficiency range of the front electric drive axle and the lower limit of the torque high-efficiency range of the rear electric drive axle.

[0065] In this embodiment, the minimum torque efficiency range lower limit is selected between the lower limit of the front electric drive axle torque efficiency range and the lower limit of the rear electric drive axle torque efficiency range. In this embodiment, the minimum torque efficiency range lower limit is the minimum value selected between the lower limits of the front and rear electric drive axle torque efficiency ranges. This minimum value can be either the lower limit of the front or rear electric drive axle torque efficiency range, and can be obtained by comparing the two.

[0066] S270. The driver's required torque is compared with one or at least two of the following: the sum of the first torque upper limit and the second torque upper limit, the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, and the lower limit of the minimum torque efficiency range, to obtain the comparison result.

[0067] In this embodiment, the driver's required torque is compared with the sum of the first and second torque upper limits, the sum of the upper limits of the front and rear electric drive axle torque efficiency ranges, the sum of the lower limits of the front and rear electric drive axle torque efficiency ranges, and the lower limit of the minimum torque efficiency range to obtain a comparison result. Specifically, the driver's required torque can be compared with the sum of the first and second torque upper limits; the driver's required torque can be compared with the sum of the first and second torque upper limits, and the sum of the upper limits of the front and rear electric drive axle torque efficiency ranges; the driver's required torque can be compared with the sum of the lower limits of the front and rear electric drive axle torque efficiency ranges; and the driver's required torque can be compared with the lower limit of the minimum torque efficiency range selected between the lower limits of the front and rear electric drive axle torque efficiency ranges.

[0068] S280. Based on the comparison results and the pre-configured torque distribution rules, determine the corresponding torque distribution on the front electric drive axle and the rear electric drive axle respectively.

[0069] In this embodiment, the allocated torque on the front and rear electric drive axles is determined by comparing the driver's required torque with the first and second torque upper limits in the performance parameter information, as well as the upper limit, lower limit, and lower limit of the torque efficiency range parameters for the front electric drive axle, and the torque efficiency range parameters for the rear electric drive axle, and by using pre-configured torque allocation rules. Specifically, if the comparison result shows that the driver's required torque is greater than or equal to the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, then the first allocation rule is satisfied, and torque is allocated according to the first allocation rule. If the comparison result shows that the driver's required torque is less than the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the upper limit of the high-efficiency torque range of the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle, then the second allocation rule is satisfied, and torque is allocated according to the second allocation rule. If the comparison result shows that the driver's required torque is less than the sum of the upper limit of the high-efficiency torque range of the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the upper limit of the high-efficiency torque range of the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle, then the second allocation rule is satisfied, and torque is allocated according to the second allocation rule. If the required torque is greater than or equal to the sum of the lower limits of the high-efficiency torque ranges of the front and rear electric drive axles, the third allocation rule is satisfied, and torque is allocated according to the third allocation rule. If the comparison result shows that the driver's required torque is less than the sum of the lower limits of the high-efficiency torque ranges of the front and rear electric drive axles, and the driver's required torque is greater than or equal to either the lower limit of the high-efficiency torque range of the front or rear electric drive axles, the fourth allocation rule is satisfied, and torque is allocated according to the fourth allocation rule. If the comparison result shows that the driver's required torque is less than either the lower limit of the high-efficiency torque range of the front or rear electric drive axles, the fifth allocation rule is satisfied, and torque is allocated according to the fifth allocation rule.

[0070] In one embodiment, S280 may include S2801-S2806:

[0071] S2801. If the comparison result shows that the driver's required torque is greater than or equal to the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, it is determined that the first allocation rule is met, and the torque allocated to the front electric drive axle is the first torque upper limit value, and the torque allocated to the rear electric drive axle is the second torque upper limit value.

[0072] In this embodiment, when the driver's requested torque is greater than or equal to the sum of the first upper limit torque value corresponding to the front electric drive axle and the second upper limit torque value corresponding to the rear electric drive axle, it is determined that the first allocation rule is satisfied. In this case, torque is allocated to the front and rear electric drive axles according to the first allocation rule, i.e., the torque allocated to the front electric drive axle is the first upper limit torque value, and the torque allocated to the rear electric drive axle is the second upper limit torque value. For example, when Torque_Request_Driver (driver's requested torque) ≥

[0073] When (Torque_Max_Front (maximum torque limit of the front electric drive axle) + Torque_Max_Rear (maximum torque limit of the rear electric drive axle)), Torque_Command_Front (torque allocated to the front electric drive axle) = Torque_Max_Front (maximum torque limit of the front electric drive axle); Torque_Command_Rear (torque allocated to the rear electric drive axle) = Torque_Max_Rear (maximum torque limit of the rear electric drive axle).

[0074] S2802. If the comparison result shows that the driver's required torque is less than the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the upper limit of the high-efficiency torque range of the front electric drive axle corresponding to the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle corresponding to the rear electric drive axle, then the second allocation rule is satisfied. The torque allocated to the front electric drive axle is the upper limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the upper limit of the high-efficiency torque range of the front electric drive axle.

[0075] In this embodiment, if the driver's required torque is less than the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the upper limit of the high-efficiency torque range of the front electric drive axle corresponding to the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle corresponding to the rear electric drive axle, then the second allocation rule is satisfied. The torque allocated to the front electric drive axle is the upper limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the upper limit of the high-efficiency torque range of the front electric drive axle. For example, when Torque_Request_Driver (driver's required torque) < (Torque_Max_Front (maximum torque limit of the front electric drive axle) + Torque_Max_Rear (maximum torque limit of the rear electric drive axle)) and Torque_Request_Driver (driver's required torque) ≥ (Torque_High_Efficient_Front (maximum torque efficiency range limit of the front electric drive axle) + Torque_High_Efficient_Rear (maximum torque efficiency range limit of the rear electric drive axle)), Torque_Command_Front (torque allocated to the front electric drive axle) = Torque_High_Efficient_Front (maximum torque efficiency range limit of the front electric drive axle) Torque_Command_Rear (torque allocated to the rear electric drive axle) = Torque_Request_Driver (driver's required torque) - Torque_High_Efficient_Front (maximum torque efficiency range limit of the front electric drive axle).

[0076] S2803. If the comparison result shows that the driver's required torque is less than the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, then the third allocation rule is satisfied. The torque allocated to the front electric drive axle is the lower limit of the torque efficiency range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the torque efficiency range of the front electric drive axle.

[0077] In this embodiment, the sum of the upper limit of the high-efficiency torque range of the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle is determined. If the comparison result shows that the driver's required torque is less than the sum of the upper limits of the high-efficiency torque ranges of the front and rear electric drive axles, and the driver's required torque is greater than or equal to the sum of the lower limits of the high-efficiency torque ranges of the front and rear electric drive axles, then the third allocation rule is satisfied. The torque allocated to the front electric drive axle is the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the front electric drive axle. For example, when Torque_Request_Driver (driver's required torque) < (Torque_High_Efficient_Front (upper limit of the high-efficiency torque range of the front electric drive axle) + Torque_High_Efficient_Rear (... When the upper limit of the high-efficiency torque range of the rear electric drive axle is met and Torque_Request_Driver (driver's required torque) ≥ (Torque_Low_Efficient_Front (lower limit of the high-efficiency torque range of the front electric drive axle) + Torque_Low_Efficient_Rear (lower limit of the high-efficiency torque range of the rear electric drive axle)), Torque_Command_Front (torque allocated to the front electric drive axle) = Torque_Low_Efficient_Front (lower limit of the high-efficiency torque range of the front electric drive axle); Torque_Command_Rear (torque allocated to the rear electric drive axle) = Torque_Request_Driver (driver's required torque) - Torque_Low_Efficient_Front (lower limit of the high-efficiency torque range of the front electric drive axle).

[0078] S2804. If the comparison result shows that the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the lower limit of the high-efficiency torque range of the front electric drive axle, then the case where the lower limit of the high-efficiency torque range of the front electric drive axle is the minimum high-efficiency torque range lower limit is satisfied in the first condition of the fourth allocation rule is determined. The torque allocated to the front electric drive axle is the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle.

[0079] In this embodiment, if the comparison result shows that the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the lower limit of the high-efficiency torque range of the front electric drive axle, then the first condition in the fourth allocation rule is satisfied. The torque allocated to the front electric drive axle is the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle.

[0080] S2805. If the comparison result shows that the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the lower limit of the high-efficiency torque range of the rear electric drive axle, then the lower limit of the high-efficiency torque range of the rear electric drive axle is determined to be the minimum high-efficiency torque range lower limit in the first condition of the fourth allocation rule. In this case, the torque allocated to the front electric drive axle is determined to be the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque allocated to the rear electric drive axle is determined to be the lower limit of the high-efficiency torque range of the rear electric drive axle.

[0081] In this embodiment, if the comparison result shows that the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the lower limit of the high-efficiency torque range of the rear electric drive axle, then the second condition in the fourth allocation rule is satisfied. The torque allocated to the front electric drive axle is determined to be the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque allocated to the rear electric drive axle is determined to be the lower limit of the high-efficiency torque range of the rear electric drive axle.

[0082] For example, when Torque_Request_Driver (driver's required torque) < Torque_Low_Efficient_Front (lower limit of the efficient torque range of the front electric drive axle) + Torque_Low_Efficient_Rear (lower limit of the efficient torque range of the rear electric drive axle)), and Torque_Request_Driver (driver's required torque) ≥ Min(Torque_Low_Efficient_Front (lower limit of the efficient torque range of the front electric drive axle), Torque_Low_Efficient_Rear (lower limit of the efficient torque range of the rear electric drive axle)), there are two cases:

[0083] One approach is (when Torque_Low_Efficient_Front (lower limit of the high-efficiency torque range of the front electric drive axle) ≤ Torque_Low_Efficient_Rear (lower limit of the high-efficiency torque range of the rear electric drive axle)), Torque_Command_Front (torque distributed on the front electric drive axle) = Torque_Low_Efficient_Front (lower limit of the high-efficiency torque range of the front electric drive axle); Torque_Command_Rear (torque distributed on the rear electric drive axle) = Torque_Request_Driver (driver's required torque) - Torque_Low_Efficient_Front (lower limit of the high-efficiency torque range of the rear electric drive axle);

[0084] Another option is: (when Torque_Low_Efficient_Rear (lower limit of the high-efficiency range of the rear electric drive axle torque) ≤ Torque_Low_Efficient_Front (lower limit of the high-efficiency range of the front electric drive axle torque)), Torque_Command_Front (torque distributed on the front electric drive axle) = Torque_Request_Driver (driver's required torque) - Torque_Low_Efficient_Rear (lower limit of the high-efficiency range of the rear electric drive axle torque), Torque_Command_Rear (torque distributed on the rear electric drive axle torque) = Torque_Low_Efficient_Rear (lower limit of the high-efficiency range of the rear electric drive axle torque).

[0085] S2806. If the comparison result shows that the driver's required torque is less than any of the lower limits in the second condition, it is determined that the fifth allocation rule is met, and the torque allocated on the front electric drive axle and the torque allocated on the rear electric drive axle are both (driver's required torque) / 2.

[0086] In this embodiment, if the torque demanded by the driver is less than either the lower limit of the high-efficiency torque range of the front electric drive axle or the lower limit of the high-efficiency torque range of the rear electric drive axle, it is determined that the fifth allocation rule is met, and the torque allocated to the front electric drive axle and the torque allocated to the rear electric drive axle are both (driver demanded torque) / 2.

[0087] The technical solution of this invention compares the driver's required torque with the first and second torque upper limits in the performance parameter information, as well as the upper limit, lower limit, and lower limit of the torque efficiency range of the front electric drive axle, and the torque efficiency range parameters of the rear electric drive axle, to obtain the comparison results. The torque distribution rule corresponding to the comparison results is then determined, thereby determining the allocated torque on the front and rear electric drive axles. This further achieves torque distribution between the front and rear electric drive axles with the goal of improving economy, without increasing hardware costs, solely by comparing the driver's required torque with the characteristic torque boundary of the electric drive axle, using simple rules.

[0088] For example, to better understand the torque distribution on the front and rear electric drive axles, this embodiment, without increasing hardware costs, uses only a comparison between the driver's required torque and the characteristic torque boundaries of the electric drive axles. A simple rule is then used to achieve torque distribution between the front and rear electric drive axles with the goal of improving fuel economy. The characteristic torque boundaries of the electric drive axles include: the upper limit of the maximum torque of the front electric drive axle (i.e., the first torque upper limit value in the above embodiment), the upper limit of the maximum torque of the rear electric drive axle (i.e., the second torque upper limit value in the above embodiment), the upper limit of the high-efficiency torque range of the front electric drive axle, the lower limit of the high-efficiency torque range of the front electric drive axle, the upper limit of the high-efficiency torque range of the rear electric drive axle, and the lower limit of the high-efficiency torque range of the rear electric drive axle. These characteristic torque boundary values ​​are readily available, reliable, and efficient for torque distribution in dual-electric drive axle vehicles. The torque distribution method for dual-electric drive axle vehicles may specifically include the following steps:

[0089] a1. Obtain the maximum torque limit of the front electric drive axle corresponding to the front electric drive axle and the maximum torque limit of the rear electric drive axle corresponding to the rear electric drive axle.

[0090] a2. Determine the upper limit of the high-efficiency torque range of the front electric drive axle, the lower limit of the high-efficiency torque range of the front electric drive axle, the upper limit of the high-efficiency torque range of the rear electric drive axle, and the lower limit of the high-efficiency torque range of the rear electric drive axle respectively through a pre-set electric drive axle torque bench test.

[0091] a3. Select the lower limit of the high-efficiency torque range between the front electric drive axle and the rear electric drive axle.

[0092] Among them, the lower limit of the minimum torque high-efficiency range is one of the lower limit of the torque high-efficiency range of the front electric drive axle and the lower limit of the torque high-efficiency range of the rear electric drive axle.

[0093] a4. Compare the driver's required torque with the sum of the first and second torque upper limits, the sum of the upper limits of the high-efficiency torque range of the front and rear electric drive axles, the sum of the lower limits of the high-efficiency torque range of the front and rear electric drive axles, and the lower limit of the minimum torque high-efficiency range to obtain the corresponding comparison results.

[0094] a5. Determine whether the comparison result satisfies the first allocation rule. If it does, execute a6; otherwise, execute a7. The first allocation rule is that the driver's required torque is greater than or equal to the sum of the maximum torque limit of the front electric drive axle and the maximum torque limit of the rear electric drive axle.

[0095] a6. The torque distributed on the front electric drive axle is determined to be the upper limit of the maximum torque of the front electric drive axle, and the torque distributed on the rear electric drive axle is determined to be the upper limit of the maximum torque of the rear electric drive axle.

[0096] a7. Continue to determine whether the comparison result satisfies the second allocation rule. If it does, execute a8; otherwise, execute a9. The second allocation rule is: the driver's required torque is less than the sum of the maximum torque limit of the front electric drive axle and the maximum torque limit of the rear electric drive axle, and the driver's required torque is greater than or equal to the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle.

[0097] a8. Determine that the torque distributed on the front electric drive axle is equal to the upper limit of the high-efficiency torque range of the front electric drive axle, and the torque distributed on the rear electric drive axle is equal to the upper limit of the high-efficiency torque range of the front electric drive axle.

[0098] a9. Continue to determine whether the comparison result satisfies the third allocation rule. If it does, execute a10; otherwise, execute a11. The third allocation rule is: the driver's required torque is less than the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle.

[0099] a10. Determine that the torque distributed on the front electric drive axle is the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque distributed on the rear electric drive axle is the lower limit of the high-efficiency torque range of the front electric drive axle.

[0100] a11. Continue to determine whether the comparison result satisfies the fourth allocation rule. If it does, execute a10; otherwise, execute a11. The fourth allocation rule is as follows: when the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the first condition, if the lower limit of the high-efficiency torque range of the front electric drive axle in the first condition is the minimum high-efficiency torque range lower limit, then the torque allocated to the front electric drive axle is determined to be the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle; if the lower limit of the high-efficiency torque range of the rear electric drive axle in the first condition is the minimum high-efficiency torque range lower limit, then the torque allocated to the front electric drive axle is determined to be the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque allocated to the rear electric drive axle is the lower limit of the high-efficiency torque range of the rear electric drive axle; where the first condition is expressed as: Min(lower limit of the high-efficiency torque range of the front electric drive axle, lower limit of the high-efficiency torque range of the rear electric drive axle).

[0101] a12. Determine that the torque distributed on the front electric drive axle is the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque distributed on the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle; or, determine that the torque distributed on the front electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque distributed on the rear electric drive axle is the lower limit of the high-efficiency torque range of the rear electric drive axle.

[0102] a13. Continue to determine whether the comparison result satisfies the fifth allocation rule. If it does, then execute a14. The fifth allocation rule is: the driver's required torque is less than either Min (lower limit of the high-efficiency torque range of the front electric drive axle or the lower limit of the high-efficiency torque range of the rear electric drive axle).

[0103] a14. Determine that the torque distributed on the front electric drive axle and the torque distributed on the rear electric drive axle are both: (driver's required torque) / 2.

[0104] In one embodiment, Figure 3 This is a structural block diagram of a torque distribution device for a dual-electric-drive axle vehicle according to an embodiment of the present invention. This device is suitable for the rational distribution of torque in a dual-electric-drive axle vehicle and can be implemented in hardware or software. It can be configured in the torque distribution equipment of a dual-electric-drive axle vehicle to implement a torque distribution method for a dual-electric-drive axle vehicle according to an embodiment of the present invention.

[0105] like Figure 3 As shown, the device is applied to a vehicle and includes: a first information acquisition module 310, a second information acquisition module 320, and a torque distribution module 330.

[0106] The first information acquisition module 310 is used to acquire the performance parameter information corresponding to the front electric drive bridge and the rear electric drive bridge respectively.

[0107] The second information acquisition module 320 is used to determine the torque high-efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle respectively through a preset electric drive axle torque bench test;

[0108] The torque distribution module 330 is used to acquire the torque required by the driver, and determine the corresponding distributed torque on the front electric drive axle and the rear electric drive axle based on the torque required by the driver, the performance parameter information, the torque high efficiency range parameter and the pre-configured torque distribution rules.

[0109] The principle of the torque distribution rule is that the torque distributed to the front electric drive axle and the rear electric drive axle is within their respective torque efficiency range parameters.

[0110] In this embodiment of the invention, the torque distribution module determines the torque to be allocated to the front and rear electric drive axles by using the performance parameters, torque efficiency range parameters, and pre-configured torque distribution rules corresponding to the front and rear electric drive axles. This allows the torque allocated to each axle to fall within its respective efficiency range as much as possible, without exceeding the upper limit of the performance parameters. This achieves a reasonable distribution of the driving torque of the dual electric drive axles without reducing the torque required by the driver, thereby improving the driving efficiency of each electric drive axle and ultimately enhancing the vehicle's economy.

[0111] In one embodiment, the performance parameter information includes: a first torque upper limit value corresponding to the front electric drive axle, and a second torque upper limit value corresponding to the rear electric drive axle;

[0112] The torque efficiency range parameters include: the upper limit and lower limit of the torque efficiency range of the front electric drive axle corresponding to the front electric drive axle, and the upper limit and lower limit of the torque efficiency range of the rear electric drive axle corresponding to the rear electric drive axle.

[0113] In one embodiment, the front electric drive bridge is connected to a first electric drive bridge controller, and the rear electric drive bridge is connected to a second electric drive bridge controller; correspondingly, the first information acquisition module 310 includes:

[0114] The first acquisition unit is used to acquire the first torque upper limit value corresponding to the front electric drive axle through the first electric drive axle controller;

[0115] The second acquisition unit is used to acquire the second torque upper limit value corresponding to the rear electric drive axle through the second electric drive axle controller;

[0116] The information determination unit is used to use the first torque upper limit value and the first torque upper limit value as the performance parameter information corresponding to the front electric drive axle and the rear electric drive axle, respectively.

[0117] In one embodiment, the second information acquisition module 320 includes:

[0118] The third information acquisition unit is used to test the torque of the electric drive axle on a preset electric drive axle torque bench test according to the preset test condition modes under different working conditions, so as to obtain the torque high efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle respectively. The preset different working conditions include at least: low speed and high torque, high speed and low torque, periodic alternating operation and non-periodic alternating operation.

[0119] In one embodiment, the torque distribution rules include a first distribution rule, a second distribution rule, a third distribution rule, a fourth distribution rule, and a fifth distribution rule;

[0120] Accordingly, the first allocation rule includes: when the driver's required torque is greater than or equal to the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, the torque allocated to the front electric drive axle is determined to be the first torque upper limit value, and the torque allocated to the rear electric drive axle is determined to be the second torque upper limit value.

[0121] The second allocation rule includes: when the driver's required torque is less than the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the upper limit of the high-efficiency torque range of the front electric drive axle corresponding to the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle corresponding to the rear electric drive axle, the torque allocated to the front electric drive axle is determined to be the upper limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the upper limit of the high-efficiency torque range of the front electric drive axle;

[0122] The third allocation rule includes: when the driver's required torque is less than the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, the torque allocated to the front electric drive axle is determined to be the lower limit of the torque efficiency range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the torque efficiency range of the front electric drive axle;

[0123] The fourth allocation rule includes: when the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the first condition, if the lower limit of the high-efficiency torque range of the front electric drive axle in the first condition is the minimum high-efficiency torque range lower limit, then the torque allocated to the front electric drive axle is determined to be the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle; if the lower limit of the high-efficiency torque range of the rear electric drive axle in the first condition is the minimum high-efficiency torque range lower limit, then the torque allocated to the front electric drive axle is determined to be the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque allocated to the rear electric drive axle is the lower limit of the high-efficiency torque range of the rear electric drive axle; wherein, the first condition is expressed as: Min(lower limit of the high-efficiency torque range of the front electric drive axle, lower limit of the high-efficiency torque range of the rear electric drive axle);

[0124] The fifth allocation rule includes: when the driver's required torque is less than any of the lower limits in the second condition, the torque allocated to the front electric drive axle and the torque allocated to the rear electric drive axle are both (driver's required torque) / 2; wherein, the second condition is expressed as: Min(lower limit of the high-efficiency range of the front electric drive axle torque, lower limit of the high-efficiency range of the rear electric drive axle torque).

[0125] In one embodiment, the torque distribution module 330 includes:

[0126] The determining unit is used to determine the sum of the first torque upper limit value and the second torque upper limit value in the performance parameter information, the sum of the upper limit of the torque high efficiency range of the front electric drive axle and the upper limit of the torque high efficiency range of the rear electric drive axle in the torque high efficiency range parameters, and the sum of the lower limit of the torque high efficiency range of the front electric drive axle and the lower limit of the torque high efficiency range of the rear electric drive axle in the torque high efficiency range parameters.

[0127] The selection unit is used to select the minimum torque high-efficiency range lower limit between the lower limit of the torque high-efficiency range of the front electric drive axle and the lower limit of the torque high-efficiency range of the rear electric drive axle; wherein, the minimum torque high-efficiency range lower limit is one of the lower limit of the torque high-efficiency range of the front electric drive axle and the lower limit of the torque high-efficiency range of the rear electric drive axle;

[0128] The comparison unit is used to compare the driver's required torque with the sum of the first torque upper limit and the second torque upper limit, the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, and the lower limit of the minimum torque efficiency range, and obtain the comparison result.

[0129] A torque distribution unit is used to determine the corresponding distributed torque on the front electric drive axle and the rear electric drive axle based on the comparison result and a pre-configured torque distribution rule.

[0130] In one embodiment, the torque distribution unit includes:

[0131] The first torque distribution subunit is used to determine that the first distribution rule is met when the comparison result is that the torque required by the driver is greater than or equal to the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, wherein the torque distributed on the front electric drive axle is the first torque upper limit value and the torque distributed on the rear electric drive axle is the second torque upper limit value.

[0132] The second torque distribution subunit is used to determine that the second distribution rule is satisfied when the comparison result is that the driver's required torque is less than the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the upper limit of the high-efficiency torque range of the front electric drive axle corresponding to the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle corresponding to the rear electric drive axle. The torque distributed on the front electric drive axle is the upper limit of the high-efficiency torque range of the front electric drive axle, and the torque distributed on the rear electric drive axle is the difference between the driver's required torque and the upper limit of the high-efficiency torque range of the front electric drive axle.

[0133] The third torque distribution subunit is used to determine that the third distribution rule is satisfied when the comparison result is that the driver's required torque is less than the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle. The torque distributed on the front electric drive axle is the lower limit of the torque efficiency range of the front electric drive axle, and the torque distributed on the rear electric drive axle is the difference between the driver's required torque and the lower limit of the torque efficiency range of the front electric drive axle.

[0134] The fourth torque distribution subunit is used to determine, under the condition that the lower limit of the torque efficiency range of the front electric drive axle is the minimum torque efficiency range lower limit in the first condition of the fourth distribution rule, when the comparison result is that the driver's required torque is less than the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the lower limit of the torque efficiency range of the front electric drive axle, the torque distributed on the front electric drive axle is the lower limit of the torque efficiency range of the front electric drive axle, and the torque distributed on the rear electric drive axle is the difference between the driver's required torque and the lower limit of the torque efficiency range of the rear electric drive axle;

[0135] The fifth torque distribution subunit is configured to, when the comparison result is that the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the lower limit of the high-efficiency torque range of the rear electric drive axle, determine that the lower limit of the high-efficiency torque range of the rear electric drive axle is the minimum lower limit of the high-efficiency torque range in the first condition of the fourth distribution rule, and determine that the torque distributed on the front electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque distributed on the rear electric drive axle is the lower limit of the high-efficiency torque range of the rear electric drive axle;

[0136] The sixth torque distribution subunit is used to determine that the fifth distribution rule is met when the comparison result is that the driver's required torque is less than any of the lower limits in the second condition, and the torque distributed on the front electric drive axle and the torque distributed on the rear electric drive axle are both (driver's required torque) / 2.

[0137] The torque distribution device for a dual-electric drive axle vehicle provided in this embodiment of the invention can execute the torque distribution processing method for a dual-electric drive axle vehicle provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0138] In one embodiment, Figure 4 This is a schematic diagram of a torque distribution device for a dual-electric-drive axle vehicle provided in an embodiment of the present invention. The torque distribution device 10 for the dual-electric-drive axle vehicle is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The torque distribution device for the dual-electric-drive axle vehicle can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, 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 illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0139] like Figure 4As shown, the torque distribution device 10 of the dual-electric-drive axle vehicle includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer programs stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the torque distribution device 10 of the dual-electric-drive axle vehicle. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0140] Multiple components in the torque distribution device 10 of the dual-electric-drive axle vehicle are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless transceiver, etc. The communication unit 19 allows the torque distribution device 10 of the dual-electric-drive axle vehicle to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0141] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the torque distribution method of a dual-drive axle vehicle.

[0142] In some embodiments, the torque distribution method for a dual-electric-drive axle vehicle can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded into and / or installed onto the torque distribution device 10 of the dual-electric-drive axle vehicle 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 torque distribution method for the dual-electric-drive axle vehicle described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the torque distribution method for the dual-electric-drive axle vehicle by any other suitable means (e.g., by means of firmware).

[0143] Various embodiments of the systems and techniques described above 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), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0144] Computer programs used to implement the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable dual-electric-drive axle vehicle torque distribution method, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The computer programs can be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0145] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0146] To provide user interaction, the systems and techniques described herein can be implemented in the torque distribution device of a dual-electric-drive axle vehicle, which includes: 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 provides input to the torque distribution device. Other types of devices can also be used to provide user interaction; for example, 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 sound input, voice input, or tactile input).

[0147] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0148] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0149] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0150] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. 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 substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A torque distribution method for a dual-electric drive axle vehicle, characterized in that, Applied to a vehicle, the vehicle comprising: a front electric drive axle and a rear electric drive axle; the torque distribution method comprising: Obtain the performance parameter information corresponding to the front electric drive bridge and the rear electric drive bridge respectively; The torque efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle were determined by a preset electric drive axle torque bench test. The required torque for the driver is obtained, and the allocated torque on the front electric drive axle and the rear electric drive axle is determined based on the required torque for the driver, the performance parameter information, the torque efficiency range parameter and the pre-configured torque allocation rule. The step of determining the allocated torque on the front and rear electric drive axles based on the driver's required torque, the performance parameter information, the torque efficiency range parameter, and a pre-configured torque allocation rule includes: The sum of the first torque upper limit and the second torque upper limit in the performance parameter information, the sum of the upper limit of the torque high efficiency range of the front electric drive axle and the upper limit of the torque high efficiency range of the rear electric drive axle in the torque high efficiency range parameters, and the sum of the lower limit of the torque high efficiency range of the front electric drive axle and the lower limit of the torque high efficiency range of the rear electric drive axle in the torque high efficiency range parameters; The minimum torque high-efficiency range lower limit is selected from the lower limit of the torque high-efficiency range of the front electric drive axle and the lower limit of the torque high-efficiency range of the rear electric drive axle; wherein, the minimum torque high-efficiency range lower limit is one of the lower limit of the torque high-efficiency range of the front electric drive axle and the lower limit of the torque high-efficiency range of the rear electric drive axle; The driver's required torque is compared with one or at least two of the following: the sum of the first torque upper limit and the second torque upper limit, the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, and the lower limit of the minimum torque efficiency range, to obtain the comparison result. Based on the comparison results and the pre-configured torque distribution rules, the corresponding torque distribution on the front electric drive axle and the rear electric drive axle is determined respectively.

2. The method according to claim 1, characterized in that, The performance parameter information includes: the first torque upper limit value corresponding to the front electric drive axle, and the second torque upper limit value corresponding to the rear electric drive axle; The torque efficiency range parameters include: the upper limit and lower limit of the torque efficiency range of the front electric drive axle corresponding to the front electric drive axle, and the upper limit and lower limit of the torque efficiency range of the rear electric drive axle corresponding to the rear electric drive axle.

3. The method according to claim 1, characterized in that, The front electric drive bridge is connected to a first electric drive bridge controller, and the rear electric drive bridge is connected to a second electric drive bridge controller; correspondingly, obtaining the performance parameter information corresponding to the front and rear electric drive bridges respectively includes: The first torque upper limit value corresponding to the front electric drive axle is obtained through the first electric drive axle controller; The second torque upper limit value corresponding to each of the rear electric drive axles is obtained through the second electric drive axle controller; The first torque upper limit value and the first torque upper limit value are used as the performance parameter information corresponding to the front electric drive axle and the rear electric drive axle, respectively.

4. The method according to claim 1, characterized in that, The step of determining the torque efficiency range parameters for the front and rear electric drive axles respectively through a preset electric drive axle torque bench test includes: The torque of the electric drive axle is tested on a preset electric drive axle torque bench test according to the preset test conditions under different working conditions, so as to obtain the torque high efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle respectively. The preset different operating conditions include at least: low speed and high torque, high speed and low torque, periodic alternating operation and non-periodic alternating operation.

5. The method according to claim 1, characterized in that, The torque distribution rules include a first distribution rule, a second distribution rule, a third distribution rule, a fourth distribution rule, and a fifth distribution rule; correspondingly, the first distribution rule includes: when the driver's required torque is greater than or equal to the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, the torque distributed on the front electric drive axle is determined to be the first torque upper limit value, and the torque distributed on the rear electric drive axle is determined to be the second torque upper limit value; The second allocation rule includes: when the driver's required torque is less than the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the upper limit of the high-efficiency torque range of the front electric drive axle corresponding to the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle corresponding to the rear electric drive axle, the torque allocated to the front electric drive axle is determined to be the upper limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the upper limit of the high-efficiency torque range of the front electric drive axle; The third allocation rule includes: when the driver's required torque is less than the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, the torque allocated to the front electric drive axle is determined to be the lower limit of the torque efficiency range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the torque efficiency range of the front electric drive axle; The fourth allocation rule includes: when the driver's required torque is less than the sum of the lower limit of the high-efficiency torque range of the front electric drive axle and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the driver's required torque is greater than or equal to the first condition, if the lower limit of the high-efficiency torque range of the front electric drive axle in the first condition is the minimum high-efficiency torque range lower limit, then the torque allocated to the front electric drive axle is determined to be the lower limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle; if the lower limit of the high-efficiency torque range of the rear electric drive axle in the first condition is the minimum high-efficiency torque range lower limit, then the torque allocated to the front electric drive axle is determined to be the difference between the driver's required torque and the lower limit of the high-efficiency torque range of the rear electric drive axle, and the torque allocated to the rear electric drive axle is the lower limit of the high-efficiency torque range of the rear electric drive axle; wherein, the first condition is expressed as: Min(lower limit of the high-efficiency torque range of the front electric drive axle, lower limit of the high-efficiency torque range of the rear electric drive axle); The fifth allocation rule includes: when the driver's required torque is less than any of the lower limits in the second condition, the torque allocated to the front electric drive axle and the torque allocated to the rear electric drive axle are both (driver's required torque) / 2; wherein, the second condition is expressed as: Min(lower limit of the high-efficiency range of the front electric drive axle torque, lower limit of the high-efficiency range of the rear electric drive axle torque).

6. The method according to claim 1, characterized in that, Based on the comparison results and pre-configured torque distribution rules, the corresponding torque distribution on the front electric drive axle and the rear electric drive axle is determined, including: If the comparison result shows that the driver's required torque is greater than or equal to the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, it is determined that the first allocation rule is met, the torque allocated to the front electric drive axle is the first torque upper limit value, and the torque allocated to the rear electric drive axle is the second torque upper limit value. If the comparison result shows that the driver's required torque is less than the sum of the first torque upper limit value corresponding to the front electric drive axle and the second torque upper limit value corresponding to the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the upper limit of the high-efficiency torque range of the front electric drive axle corresponding to the front electric drive axle and the upper limit of the high-efficiency torque range of the rear electric drive axle corresponding to the rear electric drive axle, then the second allocation rule is satisfied. The torque allocated to the front electric drive axle is the upper limit of the high-efficiency torque range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the upper limit of the high-efficiency torque range of the front electric drive axle. If the comparison result shows that the driver's required torque is less than the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, then the third allocation rule is satisfied. The torque allocated to the front electric drive axle is the lower limit of the torque efficiency range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the torque efficiency range of the front electric drive axle. If the comparison result shows that the driver's required torque is less than the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the lower limit of the torque efficiency range of the front electric drive axle, then it is determined that the lower limit of the torque efficiency range of the front electric drive axle is the minimum torque efficiency range lower limit in the first condition of the fourth allocation rule. In this case, the torque allocated to the front electric drive axle is the lower limit of the torque efficiency range of the front electric drive axle, and the torque allocated to the rear electric drive axle is the difference between the driver's required torque and the lower limit of the torque efficiency range of the rear electric drive axle. If the comparison result shows that the driver's required torque is less than the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, and the driver's required torque is greater than or equal to the lower limit of the torque efficiency range of the rear electric drive axle, then if the lower limit of the torque efficiency range of the rear electric drive axle is determined to be the minimum torque efficiency range lower limit in the first condition of the fourth allocation rule, then the torque allocated to the front electric drive axle is determined to be the difference between the driver's required torque and the lower limit of the torque efficiency range of the rear electric drive axle, and the torque allocated to the rear electric drive axle is the lower limit of the torque efficiency range of the rear electric drive axle. If the comparison result is that the driver's required torque is less than any of the lower limits in the second condition, it is determined that the fifth allocation rule is met, and the torque allocated to the front electric drive axle and the torque allocated to the rear electric drive axle are both (driver's required torque) / 2.

7. A torque distribution device for a dual-electric drive axle vehicle, characterized in that, include: The first information acquisition module is used to acquire the performance parameter information corresponding to the front electric drive bridge and the rear electric drive bridge respectively. The second information acquisition module is used to determine the torque high-efficiency range parameters corresponding to the front electric drive axle and the rear electric drive axle respectively through a preset electric drive axle torque bench test; The torque distribution module is used to obtain the torque required by the driver, and determine the corresponding distributed torque on the front electric drive axle and the rear electric drive axle based on the torque required by the driver, the performance parameter information, the torque high efficiency range parameter and the pre-configured torque distribution rules. The principle of the torque distribution rule is that the torque distributed to the front electric drive axle and the rear electric drive axle is within their respective torque efficiency range parameters. The torque distribution module includes: The determining unit is used to determine the sum of the first torque upper limit value and the second torque upper limit value in the performance parameter information, the sum of the upper limit of the torque high efficiency range of the front electric drive axle and the upper limit of the torque high efficiency range of the rear electric drive axle in the torque high efficiency range parameters, and the sum of the lower limit of the torque high efficiency range of the front electric drive axle and the lower limit of the torque high efficiency range of the rear electric drive axle in the torque high efficiency range parameters. The selection unit is used to select the minimum torque high-efficiency range lower limit between the lower limit of the torque high-efficiency range of the front electric drive axle and the lower limit of the torque high-efficiency range of the rear electric drive axle; wherein, the minimum torque high-efficiency range lower limit is one of the lower limit of the torque high-efficiency range of the front electric drive axle and the lower limit of the torque high-efficiency range of the rear electric drive axle; The comparison unit is used to compare the driver's required torque with the sum of the first torque upper limit and the second torque upper limit, the sum of the upper limit of the torque efficiency range of the front electric drive axle and the upper limit of the torque efficiency range of the rear electric drive axle, the sum of the lower limit of the torque efficiency range of the front electric drive axle and the lower limit of the torque efficiency range of the rear electric drive axle, and the lower limit of the minimum torque efficiency range, and obtain the comparison result. A torque distribution unit is used to determine the corresponding distributed torque on the front electric drive axle and the rear electric drive axle based on the comparison result and a pre-configured torque distribution rule.

8. A torque distribution device for a dual-electric drive axle vehicle, characterized in that, The torque distribution device of the dual-electric drive axle vehicle includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the torque distribution method for the dual-electric drive axle vehicle according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the torque distribution method of the dual-electric drive axle vehicle as described in any one of claims 1-6.

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