A power distribution method, device, equipment and medium of a vehicle power system

Abstract

Embodiments of the present application disclose a power distribution method, device, equipment and medium of a vehicle power system, which is applied to a vehicle including a tractor and a trailer; the power distribution method first acquires the total vehicle load and the total vehicle demand torque; then, according to the total vehicle load, and based on the preset mapping relationship between the energy consumption and the torque of the tractor, and based on the preset mapping relationship between the energy consumption and the torque of the trailer, the total vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum. By using the above method, the power distribution result of the tractor and the trailer corresponding to the lowest total vehicle energy consumption is determined, the power performance of the vehicle is improved, the fuel efficiency and the vehicle life are improved, and the energy consumption economy potential and the maximum endurance of the vehicle power system are excavated.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of new energy vehicles, and in particular to a power distribution method, device, equipment and medium of a vehicle power system. BACKGROUND

[0002] With the demand for complying with the energy economy of the whole vehicle running, new energy commercial vehicle technology has become an inevitable development trend. Among them, the driving range of pure electric commercial vehicles mainly depends on the capacity of the power battery. However, as a combination of a tractor and a trailer for freight use, the capacity of the power battery is limited by the load and volume of the vehicle, resulting in problems such as short driving range and long charging time of the vehicle.

[0003] In order to solve the range anxiety, an electrically driven trailer with an additional power battery can be combined with a tractor, that is, the power battery and / or the engine in the tractor can provide driving force or braking force for the whole vehicle, and the power battery in the electrically driven trailer can also provide driving force or braking force for the whole vehicle. However, for the combination of a tractor and a trailer for freight use, there is no technical research on power distribution between the tractor and the trailer based on the goal of meeting the optimal energy economy during the whole vehicle running. SUMMARY

[0004] Embodiments of the present application provide a power distribution method, device, equipment and medium of a vehicle power system to determine the power distribution result of the tractor and the trailer corresponding to the lowest energy consumption of the whole vehicle, and further to tap the energy economy potential and maximum endurance of the vehicle power system.

[0005] In a first aspect, embodiments of the present application provide a power distribution method of a vehicle power system, which is applied to a vehicle including a tractor and a trailer;

[0006] The power distribution method includes:

[0007] obtaining the load of the whole vehicle and the demand torque of the whole vehicle;

[0008] According to the load of the whole vehicle, and based on a preset mapping relationship between the energy consumption and the torque of the tractor, and based on a preset mapping relationship between the energy consumption and the torque of the trailer, the demand torque of the whole vehicle is distributed to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum.

[0009] In a second aspect, embodiments of the present application also provide a power distribution device of a vehicle power system, which is applied to a vehicle including a tractor and a trailer;

[0010] The power distribution device comprises:

[0011] An information acquisition module is configured to acquire a total vehicle load and a total vehicle demand torque;

[0012] A power distribution module is configured to distribute the total vehicle demand torque according to the total vehicle load, based on a preset mapping relationship between energy consumption and torque of the tractor, and based on a preset mapping relationship between energy consumption and torque of the trailer, to determine a first target demand torque of the tractor and a second target demand torque of the trailer; wherein the sum of energy consumption of the tractor corresponding to the first target demand torque and energy consumption of the trailer corresponding to the second target demand torque is minimum.

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

[0014] One or more processors;

[0015] A storage device configured to store one or more programs;

[0016] When the one or more programs are executed by the one or more processors, the one or more processors implement the power distribution method of the vehicle power system according to any one of the first aspect.

[0017] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium having a computer program stored thereon, which is executed by a processor to implement the power distribution method of the vehicle power system according to any one of the first aspect.

[0018] The embodiment of the present application provides a power distribution method, device, equipment and medium of a vehicle power system, which is applied to a vehicle including a tractor and a trailer; the power distribution method first acquires the whole vehicle load and the whole vehicle demand torque; then, according to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque and the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum. By using the above method, based on the optimal energy consumption economy of the whole vehicle in the whole running process, the whole vehicle demand torque is distributed under the premise of ensuring the driving safety of the tractor and the trailer according to the whole vehicle load, the power distribution result of the tractor and the trailer corresponding to the lowest whole vehicle energy consumption is determined, and the reasonable distribution ratio of the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer can effectively realize the demand of the lowest energy consumption, reduce the power of the tractor, improve the power performance and economy of the whole vehicle, improve the fuel saving rate and the whole vehicle life, and further tap the energy consumption economy potential and the maximum endurance of the vehicle power system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of a vehicle applying a vehicle power system provided by the embodiment of the present application;

[0020] Figure 2 is a flow schematic diagram of a power distribution method of a vehicle power system provided by the embodiment of the present application;

[0021] Figure 3 is a flow schematic diagram of another power distribution method of a vehicle power system provided by the embodiment of the present application;

[0022] Figure 4 is a flow schematic diagram of still another power distribution method of a vehicle power system provided by the embodiment of the present application;

[0023] Figure 5 is a flow schematic diagram of still another power distribution method of a vehicle power system provided by the embodiment of the present application;

[0024] Figure 6 is a universal characteristic schematic diagram of an engine provided by the embodiment of the present application;

[0025] Figure 7 is a flow schematic diagram of still another power distribution method of a vehicle power system provided by the embodiment of the present application;

[0026] Figure 8This is a schematic diagram of the structure of a power distribution device for a vehicle power system provided in an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of a terminal device provided in an embodiment of the present invention. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0029] Figure 1 This is a structural schematic diagram of a vehicle using a vehicle powertrain system according to an embodiment of the present invention. Figure 2 This is a flowchart illustrating a power distribution method for a vehicle powertrain system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, this vehicle powertrain system is applied to a vehicle including a tractor 10 and a trailer 20. This power distribution method is applicable to the power distribution process between the tractor and trailer when considering the lowest overall vehicle energy consumption. This power distribution method can be executed by a power distribution device of the vehicle powertrain system, which can be implemented in hardware and / or software and can be configured in a control panel. Figure 2 As shown, the power distribution method includes:

[0030] S110: Obtain the total vehicle load capacity and the required torque for the vehicle.

[0031] Specifically, please refer to Figure 1 This vehicle power system is applied to a vehicle including a tractor unit 10 and a trailer unit 20. During the vehicle's operation, both the tractor unit 10 and the trailer unit 20 can provide driving or braking force to the entire vehicle to ensure normal driving or stopping. For example, the tractor unit 10 can be a fuel-powered tractor unit, a pure electric tractor unit, or a hybrid tractor unit. For example, the trailer unit 20 can be an electric full trailer or an electric semi-trailer. Thus, different combinations of tractor units 10 and trailer units 20 result in different torque requirements for the entire vehicle under various driving conditions. It is understandable that different load capacities, i.e., different load distributions of the tractor unit 10 and trailer unit 20, will result in different driving or braking forces provided by the tractor unit 10 and trailer unit 20, and thus different driving or braking torque requirements.

[0032] The whole vehicle load is obtained. For example, a load detection element can be additionally provided to detect the load of the tractor 10 and the trailer 20 in real time or at a timing, and the sum of the load of the tractor 10 and the load of the trailer 20 is the whole vehicle load. Alternatively, the load of the tractor 10 and the trailer 20 can be determined by human judgment, and the user converts the whole vehicle load determined into an electrical signal and sends it to the corresponding central processor. The whole vehicle demand torque is obtained. For example, the central processor can detect the whole vehicle information such as the driving speed, the accelerator pedal opening degree information, and the brake pedal opening degree information of the whole vehicle in real time or at a timing, and analyze and process these whole vehicle information to determine the corresponding whole vehicle demand torque during the driving of the vehicle.

[0033] In addition, the vehicle power system is applied to the vehicle, which can also include a tractor power battery 30, a tractor engine 40, a tractor drive motor 50, a trailer power battery 60, and a trailer drive motor 70. For example, the tractor engine 40 can be a diesel engine, a gasoline engine, a hydrogen engine, a natural gas engine, or a fuel cell engine. For example, the tractor power battery 30 and / or the tractor engine 40 can power the tractor drive motor 50 to ensure that the tractor drive motor 50 provides driving force or braking force for the tractor 10 part of the whole vehicle. In addition, the trailer power battery 60 can power the trailer drive motor 70 to ensure that the trailer drive motor 70 provides driving force or braking force for the trailer 20 part of the whole vehicle. The trailer power battery 60 can also achieve auxiliary driving and braking energy recovery of the trailer 20 to the tractor 10, control the trailer drive motor 70 to convert excess energy into electrical energy and store it in the trailer power battery 60, thereby effectively increasing the cruising range of the whole vehicle and achieving the purpose of energy saving and emission reduction.

[0034] S120, according to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is power distributed to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum.

[0035] It can be understood that the whole vehicle load is different, that is, the load distribution of the tractor and the trailer is different, the driving force or braking force provided by the tractor and the trailer for the whole vehicle is different, and the driving demand torque or braking demand torque borne by the tractor and the trailer is different. And whether it is the driving process or the braking process of the whole vehicle, the greater the demand torque borne by the tractor, the greater the energy consumption of the tractor, and the greater the demand torque borne by the trailer, the greater the energy consumption of the trailer. Therefore, in the embodiment, based on the energy consumption economy optimization target of the whole vehicle in the whole running process, the driving demand torque of the whole vehicle is distributed under the premise of ensuring the driving safety of the tractor and the trailer, and the power distribution result of the tractor and the trailer corresponding to the lowest energy consumption of the whole vehicle is determined, so that in the corresponding driving process or braking process of the tractor and the trailer, the sum of the energy consumption corresponding to the demand torque borne by the tractor and the demand torque borne by the trailer is minimum.

[0036] Specifically, according to the obtained whole vehicle demand torque, and based on the energy consumption economy optimization target of the whole vehicle in the whole running process, the power distribution of the whole vehicle demand torque is performed, and the sum of the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer is finally determined as the whole vehicle demand torque. And the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum. Exemplarily, the preset mapping relationship between the tractor energy consumption and the torque can be drawn on the graph according to the engine universal characteristic map and / or the universal characteristic map of the driving motor in the tractor, with the speed as the horizontal coordinate and the torque or power as the vertical coordinate, a plurality of equal energy consumption rate curves or equal power curves, etc. are drawn, and the most economical working area of the engine and / or driving motor is determined by monitoring the changes of the main parameters of the engine and / or driving motor in the whole working range. And the preset mapping relationship between the trailer energy consumption and the torque can be drawn on the graph according to the universal characteristic map of the driving motor in the trailer, with the speed as the horizontal coordinate and the torque or power as the vertical coordinate, a plurality of equal energy consumption rate curves or equal power curves, etc. are drawn, and the most economical working area of the driving motor is determined by monitoring the changes of the main parameters of the driving motor in the whole working range.

[0037] The technical scheme in the embodiment of the application is applied to a vehicle including a tractor and a trailer; the power distribution method first acquires the whole vehicle load and the whole vehicle demand torque; then, according to the whole vehicle load, and based on a preset mapping relationship between the energy consumption and the torque of the tractor and a preset mapping relationship between the energy consumption and the torque of the trailer, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum. By using the above method, based on the optimal energy consumption economy of the whole vehicle in the whole running process, the whole vehicle demand torque is distributed on the premise of ensuring the driving safety of the tractor and the trailer according to the whole vehicle load, the power distribution result of the tractor and the trailer corresponding to the minimum energy consumption of the whole vehicle is determined, and the reasonable distribution ratio of the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer can effectively realize the demand of the minimum energy consumption, reduce the power of the tractor, improve the power performance and the economy of the whole vehicle, improve the fuel saving rate and the service life of the whole vehicle, and further tap the energy consumption economy potential and the maximum endurance of the vehicle power system.

[0038] Optionally, the tractor and / or the trailer is provided with a load detection unit; the whole vehicle load is acquired by collecting the electric signal generated when the load detection unit performs load detection; the whole vehicle load is determined as an empty load state, a half load state or a full load state according to the electric signal generated by the load switch.

[0039] Specifically, with continuous reference to Figure 1The load detection unit is arranged in the tractor 10 and / or the trailer 20. For example, the load detection unit in the tractor 10 can detect the load of the tractor 10 in real time or at a timing, and the load detection unit in the trailer 20 can detect the load of the trailer 20 in real time or at a timing. For example, the load detection unit in the tractor 10 can convert the detected load of the tractor 10 into an electric signal and send the electric signal to a corresponding central processor, and the load detection unit in the trailer 20 can also convert the detected load of the trailer 20 into an electric signal and send the electric signal to a corresponding central processor. The central processor can receive the electric signal generated by the load detection unit in the tractor 10 and the electric signal generated by the load detection unit in the trailer 20, and determine the sum of the load of the tractor 10 and the load of the trailer 20, i.e., the total load of the vehicle. It can be understood that the total load of the vehicle can be a specific value, and the total load of the vehicle can also be a load state divided into intervals. For example, if the sum of the load of the tractor 10 and the load of the trailer 20 is less than or equal to a first threshold value, the total load of the vehicle can be determined as an empty load state, if the sum of the load of the tractor 10 and the load of the trailer 20 is greater than the first threshold value and less than a second threshold value, the total load of the vehicle can be determined as a half load state, and if the sum of the load of the tractor 10 and the load of the trailer 20 is greater than or equal to the second threshold value, the total load of the vehicle can be determined as a full load state. It should be noted that the first threshold value is less than the second threshold value, and the specific value of the first threshold value and the second threshold value is not limited and specially required in this embodiment.

[0040] Optionally, the total vehicle demand torque includes a total vehicle driving demand torque and a total vehicle braking demand torque; the total vehicle demand torque is obtained by: obtaining a total vehicle speed, an accelerator pedal opening degree information and a brake pedal opening degree information; determining whether the tractor and the trailer are in an acceleration state or a deceleration state according to the total vehicle speed, the accelerator pedal opening degree information and the brake pedal opening degree information; determining the total vehicle driving demand torque according to at least the accelerator pedal opening degree information when the tractor and the trailer are in the acceleration state; and determining the total vehicle braking demand torque according to at least the brake pedal opening degree information when the tractor and the trailer are in the deceleration state.

[0041] Specifically, the vehicle information such as the vehicle running speed, the accelerator pedal opening degree information and the brake pedal opening degree information can be detected in real time or at a timing, and the vehicle information is analyzed and processed, so as to accurately obtain the running state of the vehicle. For example, when the vehicle running speed is not zero, the accelerator pedal opening degree information has a valid value, and the brake pedal opening degree information has an invalid value, that is, during the running of the vehicle, the user steps on the accelerator pedal and does not step on the brake pedal, it can be judged that the vehicle (including the tractor and the trailer) is in an acceleration state. Then, the vehicle driving demand torque can be determined at least according to the accelerator pedal opening degree information and a preset mapping relationship between the accelerator pedal opening degree and the demand torque, that is, the tractor and the trailer can provide driving force for the vehicle to ensure normal running of the vehicle. For example, when the vehicle running speed is not zero, the accelerator pedal opening degree information has an invalid value, and the brake pedal opening degree information has a valid value, that is, during the running of the vehicle, the user steps on the brake pedal and does not step on the accelerator pedal, it can be judged that the vehicle (including the tractor and the trailer) is in a deceleration state. Then, the vehicle braking demand torque can be determined at least according to the brake pedal opening degree information and a preset mapping relationship between the brake pedal opening degree and the demand torque, that is, the tractor and the trailer can provide braking force for the vehicle to ensure normal braking of the vehicle. For example, the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer can be respectively the driving demand torque in the driving process of the vehicle, or the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer can be respectively the braking demand torque in the braking process of the vehicle.

[0042] Optionally, after the vehicle demand torque is power distributed according to the vehicle load and based on the preset mapping relationship between the tractor energy consumption and the torque and the preset mapping relationship between the trailer energy consumption and the torque to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer, the method further comprises: controlling the tractor by the first target demand torque and controlling the trailer by the second target demand torque.

[0043] Specifically, it is ensured that the sum of the energy consumption of the tractor and the energy consumption of the trailer is the lowest during the whole running process of the vehicle, and the tractor can be better controlled by the first target demand torque and the trailer can be better controlled by the second target demand torque, so as to realize the main-hitch collaborative power distribution strategy of the tractor and the trailer, improve the driving effect and the braking effect of the tractor and the trailer, and improve the power performance and the economy of the vehicle.

[0044] Figure 3is a flow diagram of another power distribution method of a vehicle power system provided by an embodiment of the present application, and the embodiment is optimized on the basis of the above-mentioned embodiment. Optionally, according to the vehicle load, and based on a preset mapping relationship between the tractor energy consumption and the torque, and a preset mapping relationship between the trailer energy consumption and the torque, the vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer, including:

[0045] According to the vehicle load, the vehicle demand torque is distributed to determine the first initial demand torque corresponding to the tractor and the second initial demand torque corresponding to the trailer.

[0046] Based on the preset mapping relationship between the tractor energy consumption and the torque, the first initial demand torque is numerically fine-tuned to determine the first target demand torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the second initial demand torque is numerically fine-tuned to determine the second target demand torque; wherein the sum of the first initial demand torque and the second initial demand torque is equal to the sum of the first target demand torque and the second target demand torque.

[0047] For the details of the embodiment not described above, please refer to the above-mentioned embodiments, as shown in the Figure 3 The power distribution method includes:

[0048] S210, obtaining the vehicle load and the vehicle demand torque.

[0049] S220, according to the vehicle load, the vehicle demand torque is distributed to determine the first initial demand torque corresponding to the tractor and the second initial demand torque corresponding to the trailer.

[0050] Specifically, according to the obtained whole vehicle load, the whole vehicle demand torque can be preliminarily power distributed under the premise of ensuring that the tractor and the trailer are safely driven, that is, the whole vehicle demand torque is distributed to the tractor and the trailer according to a certain proportion to determine a first initial demand torque distributed to the tractor and a second initial demand torque distributed to the trailer. The whole vehicle load can be an interval divided load state. For example, the whole vehicle load can be any one of an empty load state, a half load state and a full load state. It can be understood that the power distribution results corresponding to different interval load states of the whole vehicle load are different, that is, the proportion of the first initial demand torque distributed to the tractor and the second initial demand torque distributed to the trailer is different, and a reasonable proportion can effectively realize the power performance of the whole vehicle. For example, when the whole vehicle load is in the half load state, the proportion of the first initial demand torque corresponding to the tractor and the second initial demand torque corresponding to the trailer can be 5:5, and when the whole vehicle load is in the full load state, the proportion of the first initial demand torque corresponding to the tractor and the second initial demand torque corresponding to the trailer can be 6:4. The embodiment herein is only an example and is not limited.

[0051] In S230, the first initial demand torque is numerically fine-tuned based on a preset mapping relationship between the tractor energy consumption and the torque to determine a first target demand torque, and the second initial demand torque is numerically fine-tuned based on a preset mapping relationship between the trailer energy consumption and the torque to determine a second target demand torque; wherein the sum of the first initial demand torque and the second initial demand torque is equal to the sum of the first target demand torque and the second target demand torque.

[0052] It can be understood that the acquisition of the whole vehicle load can detect the load of the tractor and the trailer in real time or timing according to the load detection unit, and can also determine the load state to which the load of the tractor and the trailer belongs according to the interval division. However, due to the error in the process of acquiring the whole vehicle load, the specific value of the load of the tractor and the trailer cannot be accurately obtained, and the distribution ratio of the first initial demand torque and the second initial demand torque obtained by distributing the whole vehicle demand torque according to the whole vehicle load is also determined according to the preset mapping relationship between the load state and the power distribution ratio. The preset mapping relationship between the load state and the power distribution ratio is determined according to historical experience, which may not adapt to various driving conditions and various types of vehicles. Therefore, based on the preset mapping relationship between the tractor energy consumption and the torque, the first initial demand torque is numerically adjusted to determine the first target demand torque. The first target demand torque is determined according to the first initial demand torque, the value of the first target demand torque is related to the value of the first initial demand torque, and the energy consumption of the tractor corresponding to the first target demand torque is lower than that of the tractor corresponding to the first initial demand torque. In addition, based on the preset mapping relationship between the trailer energy consumption and the torque, the second initial demand torque is numerically adjusted to determine the second target demand torque. The second target demand torque is determined according to the second initial demand torque, the value of the second target demand torque is related to the value of the second initial demand torque, and the energy consumption of the trailer corresponding to the second target demand torque is lower than that of the trailer corresponding to the second initial demand torque. Further, the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is more in line with the requirement of the lowest whole vehicle energy consumption.

[0053] Further, the first target demand torque is determined according to the first initial demand torque, and the second target demand torque is determined according to the second initial demand torque. The sum of the first initial demand torque and the second initial demand torque is equal to the sum of the first target demand torque and the second target demand torque, that is, the sum of the first initial demand torque and the second initial demand torque is equal to the whole vehicle demand torque, and the sum of the first target demand torque and the second target demand torque is equal to the whole vehicle demand torque. In other words, the first initial demand torque and the second initial demand torque are obtained by initially distributing the whole vehicle demand torque, the first target demand torque and the second target demand torque are obtained by accurately distributing the whole vehicle demand torque, the energy consumption of the whole vehicle corresponding to the first target demand torque and the second target demand torque is the lowest, and the energy consumption of the whole vehicle corresponding to the first target demand torque and the second target demand torque is lower than that of the whole vehicle corresponding to the first initial demand torque and the second initial demand torque.

[0054] Figure 4is a flowchart of a power distribution method of a vehicle power system provided by an embodiment of the application, and the embodiment is an optimization based on the above-mentioned embodiments. Optionally, according to the vehicle load, and based on a preset mapping relationship between the tractor energy consumption and the torque, and based on a preset mapping relationship between the trailer energy consumption and the torque, the vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer, including:

[0055] According to the vehicle load, the vehicle demand torque is distributed to determine the first initial demand torque corresponding to the tractor and the second initial demand torque corresponding to the trailer.

[0056] Based on the preset mapping relationship between the tractor energy consumption and the torque, the first initial demand torque is numerically fine-tuned to determine the first target demand torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the second initial demand torque is numerically fine-tuned to determine the second target demand torque; wherein the sum of the first initial demand torque and the second initial demand torque is equal to the sum of the first target demand torque and the second target demand torque.

[0057] Further, according to the vehicle load, the vehicle demand torque is distributed to determine the first initial demand torque corresponding to the tractor and the second initial demand torque corresponding to the trailer, including:

[0058] According to the vehicle load, and a preset mapping relationship between the vehicle load and the vehicle torque distribution weight, the first torque distribution weight corresponding to the tractor and the second torque distribution weight corresponding to the trailer are determined.

[0059] According to the vehicle demand torque, the first torque distribution weight and the second torque distribution weight, the first initial demand torque and the second initial demand torque are determined.

[0060] For details not yet described in this embodiment, please refer to the above-mentioned embodiments, such as Figure 4 As shown in the figure, the power distribution method includes:

[0061] S310, obtaining the vehicle load and the vehicle demand torque.

[0062] S320, according to the vehicle load, and a preset mapping relationship between the vehicle load and the vehicle torque distribution weight, the first torque distribution weight corresponding to the tractor and the second torque distribution weight corresponding to the trailer are determined.

[0063] Specifically, according to the obtained vehicle load, the vehicle demand torque can be preliminarily distributed under the premise of ensuring that the tractor and the trailer are safely driven, that is, the vehicle demand torque is distributed to the tractor and the trailer according to a certain proportion. It can be understood that, based on the preset mapping relationship between the vehicle load and the vehicle torque distribution weight, different vehicle loads correspond to different vehicle torque distribution weights, that is, different proportions of the demand torque distributed to the tractor and the demand torque distributed to the trailer. In addition, the sum of the first torque distribution weight and the second torque distribution weight is 1. For example, different vehicle loads correspond to different first torque distribution weights of the tractor and different second torque distribution weights of the trailer. In this way, the vehicle torque value can be distributed to the tractor according to the first torque distribution weight, and the vehicle torque value can be distributed to the trailer according to the second torque distribution weight.

[0064] In S330, the first initial demand torque and the second initial demand torque are determined according to the vehicle demand torque, the first torque distribution weight, and the second torque distribution weight.

[0065] Specifically, the first initial demand torque corresponding to the tractor can be calculated according to the product of the vehicle demand torque and the first torque distribution weight. The second initial demand torque corresponding to the trailer can be calculated according to the product of the vehicle demand torque and the second torque distribution weight.

[0066] In S340, the first initial demand torque is numerically adjusted based on the preset mapping relationship between the tractor energy consumption and the torque to determine the first target demand torque, and the second initial demand torque is numerically adjusted based on the preset mapping relationship between the trailer energy consumption and the torque to determine the second target demand torque. The sum of the first initial demand torque and the second initial demand torque is equal to the sum of the first target demand torque and the second target demand torque.

[0067] Figure 5 is a flowchart of another power distribution method of a vehicle power system provided by an embodiment of the application. The embodiment is optimized on the basis of the above-mentioned embodiment. Alternatively, according to the vehicle load, the vehicle demand torque is distributed based on the preset mapping relationship between the tractor energy consumption and the torque and based on the preset mapping relationship between the trailer energy consumption and the torque to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer, including:

[0068] According to the vehicle load, the vehicle demand torque is distributed to determine the first initial demand torque corresponding to the tractor and the second initial demand torque corresponding to the trailer.

[0069] The first initial demand torque is finely adjusted based on the preset mapping relationship between the energy consumption and the torque of the towing vehicle to determine a first target demand torque, and the second initial demand torque is finely adjusted based on the preset mapping relationship between the energy consumption and the torque of the trailer to determine a second target demand torque; wherein the sum of the first initial demand torque and the second initial demand torque is equal to the sum of the first target demand torque and the second target demand torque.

[0070] Further, the first initial demand torque is finely adjusted based on the preset mapping relationship between the energy consumption and the torque of the towing vehicle to determine a first target demand torque, and the second initial demand torque is finely adjusted based on the preset mapping relationship between the energy consumption and the torque of the trailer to determine a second target demand torque, comprising:

[0071] A first numerical fine adjustment range is determined according to the first initial demand torque, and a second numerical fine adjustment range is determined according to the second initial demand torque; wherein the first numerical fine adjustment range includes the first initial demand torque, and the second numerical fine adjustment range includes the second initial demand torque;

[0072] A plurality of first intermediate demand torques are obtained within the first numerical fine adjustment range, and a plurality of second intermediate demand torques are obtained within the second numerical fine adjustment range, and the first intermediate demand torque and the second intermediate demand torque whose sum is equal to the sum of the first initial demand torque and the second initial demand torque are defined as a group of intermediate demand torques; wherein the number of the first intermediate demand torque and the second intermediate demand torque is the same;

[0073] The sum of the energy consumption of the towing vehicle and the energy consumption of the trailer corresponding to each group of intermediate demand torques is obtained based on the preset mapping relationship between the energy consumption and the torque of the towing vehicle, and based on the preset mapping relationship between the energy consumption and the torque of the trailer;

[0074] A group of intermediate demand torques corresponding to the minimum value of the sum of the energy consumption of the towing vehicle and the energy consumption of the trailer is determined, and the first intermediate demand torque in the group of intermediate demand torques is defined as the first target demand torque, and the second intermediate demand torque in the group of intermediate demand torques is defined as the second target demand torque.

[0075] The details of the embodiment not described above can refer to the above embodiment, as shown in the above embodiment, the power distribution method comprises: Figure 5

[0076] S410, obtaining the whole vehicle load and the whole vehicle demand torque.

[0077] S420, distributing power according to the whole vehicle load and the whole vehicle demand torque to determine the first initial demand torque corresponding to the towing vehicle and the second initial demand torque corresponding to the trailer.

[0078] ​S430, determining a first numerical fine-tuning range according to the first initial demand torque, and determining a second numerical fine-tuning range according to the second initial demand torque; wherein the first numerical fine-tuning range includes the first initial demand torque, and the second numerical fine-tuning range includes the second initial demand torque.

[0079] Specifically, according to the first initial demand torque, a corresponding first numerical fine-tuning range can be determined, wherein the first numerical fine-tuning range includes the first initial demand torque. For example, the first initial demand torque can be the minimum value, the maximum value or any value between the maximum value and the minimum value in the first numerical fine-tuning range. For example, the first initial demand torque can be F1, and the corresponding first numerical fine-tuning range can be [F1, F1+△F1], [F1-△F2, F1] or [F1-△F2, F1+△F1]. It can be understood that △F1 and △F2 are the changeable conditions of the first initial demand torque F1 in the corresponding first numerical fine-tuning range, and the embodiment does not make specific requirements and special limitations on the values and sizes of △F1 and △F2.

[0080] In addition, according to the second initial demand torque, a corresponding second numerical fine-tuning range can be determined, wherein the second numerical fine-tuning range includes the second initial demand torque. For example, the second initial demand torque can be the minimum value, the maximum value or any value between the maximum value and the minimum value in the second numerical fine-tuning range. For example, the second initial demand torque can be F2, and the corresponding second numerical fine-tuning range can be [F2, F2+△F3], [F2-△F4, F2] or [F2-△F4, F2+△F3]. It can be understood that △F3 and △F4 are the changeable conditions of the second initial demand torque F2 in the corresponding second numerical fine-tuning range, and the embodiment does not make specific requirements and special limitations on the values and sizes of △F3 and △F4.

[0081] S440, obtaining a plurality of first intermediate demand torques in the first numerical fine-tuning range, and obtaining a plurality of second intermediate demand torques in the second numerical fine-tuning range, and defining the first intermediate demand torque and the second intermediate demand torque whose sum is equal to the sum of the first initial demand torque and the second initial demand torque as a group of intermediate demand torques; wherein the number of the first intermediate demand torque and the second intermediate demand torque is the same.

[0082] Specifically, in the first numerical fine-tuning range, a plurality of first intermediate demand torques can be obtained, and in the second numerical fine-tuning range, a plurality of second intermediate demand torques can be obtained, wherein the number of the first intermediate demand torques is the same as that of the second intermediate demand torques. In a specific embodiment, during the driving of the vehicle, the first initial demand torque can be F1 (unit: N), △F1 can be 20 N (unit: N), and the corresponding first numerical fine-tuning range can be [F1, F1+20]; the second initial demand torque can be F2 (unit: N), △F4 can be 20 N (unit: N), and the corresponding second numerical fine-tuning range can be [F2-20, F2]. In this way, the first intermediate demand torque can be obtained discretely in the first numerical fine-tuning range, that is, the first intermediate demand torque can be F1, F1+2, F1+4, …, F1+18, F1+20. Similarly, the second intermediate demand torque can be obtained discretely in the second numerical fine-tuning range, that is, the second intermediate demand torque can be F2, F2-2, F2-4, …, F2-18, F2-20. It should be noted that the present embodiment obtains a plurality of first intermediate demand torques and a plurality of second intermediate demand torques at a discrete distance of 2 N, which is only an example, and other discrete distances can also be reasonably selected. Then, the first intermediate demand torque and the second intermediate demand torque whose sum is equal to the sum of the first initial demand torque and the second initial demand torque can be defined as a group of intermediate demand torques. For example, F1+2 in the first intermediate demand torque and F2-2 in the second intermediate demand torque can be combined into a group of intermediate demand torques, F1+4 in the first intermediate demand torque and F2-4 in the second intermediate demand torque can be combined into a group of intermediate demand torques, and so on. Here, it is not necessary to list all examples. In this way, it is ensured that the sum of the first intermediate demand torque and the second intermediate demand torque of each group is equal to the whole vehicle demand torque.

[0083] In another specific embodiment, during braking of the vehicle, the first initial demand torque can be F1, △F2 can be 20 N, and the corresponding first numerical fine-tuning range can be [F1-20, F1]; the second initial demand torque can be F2, △F3 can be 20 N, and the corresponding second numerical fine-tuning range can be [F2, F2+20]. In this way, the first intermediate demand torque can be obtained discretely in the first numerical fine-tuning range, i.e., the first intermediate demand torque can be F1-20, F1-18, …, F1-4, F1-2, F1. Similarly, the second intermediate demand torque can be obtained discretely in the second numerical fine-tuning range, i.e., the second intermediate demand torque can be F2, F2+2, F2+4, …, F2+18, F2+20. It should be noted that the present embodiment takes 2 N as the discrete distance to obtain a plurality of first intermediate demand torques and a plurality of second intermediate demand torques, which is only an example, and other discrete distances can also be reasonably selected. Then, the first intermediate demand torque and the second intermediate demand torque whose sum is equal to the sum of the first initial demand torque and the second initial demand torque can be defined as a group of intermediate demand torques. For example, F1-2 in the first intermediate demand torque and F2+2 in the second intermediate demand torque can be combined as a group of intermediate demand torques, F1-4 in the first intermediate demand torque and F2+4 in the second intermediate demand torque can be combined as a group of intermediate demand torques, and so on. In this way, it is ensured that the sum of the first intermediate demand torque and the second intermediate demand torque of each group is equal to the whole vehicle demand torque.

[0084] In yet another specific embodiment, whether during driving or braking of the vehicle, the first intermediate demand torque is greater than the second intermediate demand torque in each group of intermediate demand torques. For example, (F1+2)>(F2-2) in a group of intermediate demand torques composed of F1+2 in the first intermediate demand torque and F2-2 in the second intermediate demand torque; (F1-2)>(F2+2) in a group of intermediate demand torques composed of F1-2 in the first intermediate demand torque and F2+2 in the second intermediate demand torque. In this way, the trailer cannot push the tractor forward, avoiding dangerous phenomena such as folding and loss of steering control, and effectively ensuring the driving safety of the tractor and the trailer.

[0085] S450, based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, obtaining the sum of the energy consumption of the tractor and the energy consumption of the trailer corresponding to each group of intermediate demand torques.

[0086] Optionally, based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the sum of the energy consumption of the tractor and the energy consumption of the trailer corresponding to each group of intermediate demand torques is obtained, including: in each group of intermediate demand torques, based on the preset mapping relationship between the tractor power and the torque, the first intermediate demand power corresponding to the first intermediate demand torque is determined, and based on the preset mapping relationship between the trailer power and the torque, the second intermediate demand power corresponding to the second intermediate demand torque is determined; according to the first intermediate demand power and the preset mapping relationship between the tractor energy consumption and the power, the corresponding energy consumption of the tractor is determined, and according to the second intermediate demand power and the preset mapping relationship between the trailer energy consumption and the power, the corresponding energy consumption of the trailer is determined, and the sum of the energy consumption of the tractor and the energy consumption of the trailer is calculated.

[0087] Specifically, after determining the values of the first intermediate demand torque and the second intermediate demand torque in each group of intermediate demand torques, the sum of the energy consumption of the tractor and the energy consumption of the trailer corresponding to each group of intermediate demand torques is determined respectively, so as to find the power distribution strategy with the lowest sum of the energy consumption of the tractor and the energy consumption of the trailer. In other words, in each group of intermediate demand torques, the first intermediate demand power corresponding to the first intermediate demand torque can be determined based on the preset mapping relationship between the tractor power and the torque, and the second intermediate demand power corresponding to the second intermediate demand torque can be determined based on the preset mapping relationship between the trailer power and the torque. Further, the energy consumption of the tractor corresponding to the first intermediate demand power can be determined based on the preset mapping relationship between the tractor energy consumption and the power, and the energy consumption of the trailer corresponding to the second intermediate demand power can be determined based on the preset mapping relationship between the trailer energy consumption and the power. Then, the energy consumption of the tractor and the energy consumption of the trailer can be added to determine the sum of the energy consumption of the whole vehicle corresponding to the group of intermediate demand torques.

[0088] Further, the preset mapping relationship between the tractor power and the torque, and the preset mapping relationship between the tractor energy consumption and the power can be obtained according to the engine universal characteristic map and / or the universal characteristic map of the driving motor in the tractor, to draw many equal energy consumption rate curves or equal power curves on the map with the speed as the horizontal coordinate and the torque or power as the vertical coordinate, and to determine the most economical working area of the engine and / or the driving motor by monitoring the changes of the main parameters of the engine and / or the driving motor in the whole working range. For example, when the tractor is a fuel-driven tractor, the universal characteristic map of the engine can be obtained, and then the energy consumption area of the engine matched with the gearbox is determined. Figure 6 is a universal characteristic diagram of an engine provided by an embodiment of the application, as Figure 6As shown, the size of the energy consumption of the tractor corresponding to the related first intermediate demand torque can be determined in the universal characteristic map of the engine. When the tractor is a pure electric drive tractor, the universal characteristic map of the motor can be obtained, and then the energy consumption area of the motor matched with the gearbox is determined. When the tractor is a hybrid tractor, the universal characteristic map of the engine and the universal characteristic map of the motor can be obtained, and then the energy consumption area of the engine matched with the gearbox and the energy consumption area of the motor matched with the gearbox are determined. In this way, the effect of determining the energy consumption of the tractor in the universal characteristic map is realized. Similarly, the preset mapping relationship between the trailer power and the torque, and the preset mapping relationship between the trailer energy consumption and the power, can be obtained according to the universal characteristic map of the driving motor in the trailer, and a plurality of equal energy consumption rate curves or equal power curves are drawn on the graph with the rotational speed as the horizontal coordinate and the torque or power as the vertical coordinate. The most economical working area of the driving motor is determined by monitoring the changes of the main parameters of the driving motor in the whole working range. When the trailer is an electric drive trailer, the universal characteristic map of the motor can be obtained, and then the energy consumption area of the motor matched with the gearbox is determined. In this way, the effect of determining the energy consumption of the trailer in the universal characteristic map is realized.

[0089] S460, determine a set of intermediate demand torques corresponding to the minimum value of the sum of the energy consumption of the tractor and the energy consumption of the trailer, and define the first intermediate demand torque in the set of intermediate demand torques as the first target demand torque, and define the second intermediate demand torque in the set of intermediate demand torques as the second target demand torque.

[0090] Specifically, the sum of the energy consumption of the tractor and the energy consumption of the trailer can be understood as the energy consumption of the whole vehicle. After determining the sum of the energy consumption of the whole vehicle corresponding to each set of intermediate demand torques, it is necessary to compare the sum of the energy consumption of the whole vehicle corresponding to each set of intermediate demand torques, find the values of the first intermediate demand torque and the second intermediate demand torque in the set of intermediate demand torques corresponding to the minimum value of the energy consumption of the whole vehicle, and define the first intermediate demand torque in the set of intermediate demand torques as the first target demand torque, and define the second intermediate demand torque in the set of intermediate demand torques as the second target demand torque. In this way, the accurate conversion of the first initial demand torque of the tractor part to the first target demand torque, and the accurate conversion of the second initial demand torque of the trailer part to the second target demand torque are realized, and under the control of the first target demand torque on the tractor and under the control of the second target demand torque on the trailer, the optimal energy consumption economy in the whole running process of the whole vehicle is achieved.

[0091] Figure 7 is a flow diagram of another power distribution method of a vehicle power system provided by an embodiment of the application, like Figure 7As shown, when the whole vehicle driving speed is not zero, the throttle pedal opening degree information has a valid value, and the brake pedal opening degree information has an invalid value, that is, in the driving process of the vehicle, the user steps on the throttle pedal and does not step on the brake pedal, it can be judged that the vehicle (including the tractor and the trailer) is in an acceleration state, which also indicates that the vehicle (including the tractor and the trailer) is in a driving process. According to the whole vehicle load, the whole vehicle demand torque can be power distributed to determine the first initial demand torque F1 corresponding to the tractor and the second initial demand torque F2 corresponding to the trailer. Further, the first initial demand torque F1 corresponds to the first numerical fine adjustment range [F1, F1+△F1], and the first intermediate demand torque can be obtained discretely in [F1, F1+△F1]. The second initial demand torque F2 corresponds to the second numerical fine adjustment range [F2-△F4, F2], and the second intermediate demand torque can be obtained discretely in [F2-△F4, F2]. Then, the first intermediate demand torque and the second intermediate demand torque whose sum is equal to the sum of the first initial demand torque and the second initial demand torque are defined as a group of intermediate demand torques, and the sum of the energy consumption of the tractor and the energy consumption of the trailer corresponding to each group of intermediate demand torques is calculated. Finally, the group of intermediate demand torques corresponding to the minimum value of the sum of the energy consumption of the tractor and the energy consumption of the trailer is determined, and the power distribution ratio of the first intermediate demand torque and the second intermediate demand torque in the group of intermediate demand torques is the power distribution result that meets the optimal energy consumption economy. The corresponding first target demand torque and second target demand torque are the driving force distribution result that meets the optimal energy consumption economy.

[0092] Similarly, when the vehicle speed is not zero, the accelerator pedal opening information contains invalid values, and the brake pedal opening information contains valid values—that is, when the user presses the brake pedal but not the accelerator pedal during vehicle operation—it can be determined that the vehicle (including the tractor and trailer) is decelerating, indicating that the vehicle (including the tractor and trailer) is in the braking process. Based on the vehicle's load capacity, the required torque can be distributed to determine the first initial required torque F1 for the tractor and the second initial required torque F2 for the trailer. Furthermore, the first numerical fine-tuning range for the first initial required torque F1 is [F1-△F2, F1], and the first intermediate required torque can be discretely obtained within [F1-△F2, F1]. The second numerical fine-tuning range for the second initial required torque F2 is [F2, F2+△F3], and the second intermediate required torque can be discretely obtained within [F2, F2+△F3]. Next, the first and second intermediate demand torques, whose sum equals the sum of the first and second initial demand torques, are defined as a set of intermediate demand torques. The energy consumption of the tractor and trailer corresponding to each set of intermediate demand torques is then calculated. Finally, a set of intermediate demand torques corresponding to the minimum sum of the tractor and trailer energy consumption is determined. The power distribution ratio of the first and second intermediate demand torques in this set represents the power distribution result that satisfies optimal energy efficiency. The corresponding first and second target demand torques represent the braking force distribution result that satisfies optimal energy efficiency.

[0093] Figure 8 This is a schematic diagram of the structure of a power distribution device for a vehicle power system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, this vehicle powertrain is applied to a vehicle including a tractor unit 10 and a trailer unit 20. This power distribution device is suitable for the power distribution process between the tractor and trailer when considering the lowest overall vehicle energy consumption. This power distribution device can be implemented in hardware and / or software and is generally located in a control panel. For example... Figure 8 As shown, the power distribution device includes:

[0094] The information acquisition module 510 is used to acquire the total vehicle load capacity and the total vehicle torque requirement; the power distribution module 520 is used to distribute power to the total vehicle torque requirement based on the total vehicle load capacity and a preset mapping relationship between the energy consumption and torque of the tractor and the trailer, so as to determine the first target torque requirement corresponding to the tractor and the second target torque requirement corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target torque requirement and the energy consumption of the trailer corresponding to the second target torque requirement is minimized.

[0095] The technical scheme in the embodiment of the application is applied to a vehicle including a tractor and a trailer; the power distribution method first acquires the total vehicle load and the total vehicle demand torque; then, according to the total vehicle load, and based on the preset mapping relationship between the energy consumption and the torque of the tractor and the preset mapping relationship between the energy consumption and the torque of the trailer, the total vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum. By using the above method, based on the optimal energy consumption economy in the whole running process of the vehicle, the total vehicle demand torque is distributed under the premise of ensuring the driving safety of the tractor and the trailer according to the total vehicle load, the power distribution result of the tractor and the trailer corresponding to the lowest energy consumption of the vehicle is determined, and the reasonable distribution ratio of the first target demand torque corresponding to the tractor and the second target demand torque corresponding to the trailer can effectively realize the demand of the lowest energy consumption, reduce the power of the tractor, improve the power performance and economy of the vehicle, improve the fuel saving rate and the service life of the vehicle, and further tap the energy consumption economy potential and the maximum endurance of the vehicle power system.

[0096] Based on the above technical scheme, the power distribution module 520 can specifically include an initial torque distribution unit and a target torque distribution unit, the initial torque distribution unit is configured to distribute the total vehicle demand torque according to the total vehicle load to determine the first initial demand torque corresponding to the tractor and the second initial demand torque corresponding to the trailer; the target torque distribution unit is configured to finely adjust the value of the first initial demand torque based on the preset mapping relationship between the energy consumption and the torque of the tractor to determine the first target demand torque, and finely adjust the value of the second initial demand torque based on the preset mapping relationship between the energy consumption and the torque of the trailer to determine the second target demand torque; wherein the sum of the first initial demand torque and the second initial demand torque is equal to the sum of the first target demand torque and the second target demand torque.

[0097] Optionally, the initial torque distribution unit can specifically include a distribution weight determination subunit and an initial torque distribution subunit, the distribution weight determination subunit is configured to determine the first torque distribution weight corresponding to the tractor and the second torque distribution weight corresponding to the trailer according to the total vehicle load and the preset mapping relationship between the total vehicle load and the total vehicle torque distribution weight; the initial torque distribution subunit is configured to determine the first initial demand torque and the second initial demand torque according to the total vehicle demand torque, the first torque distribution weight and the second torque distribution weight.

[0098] Optionally, the target torque distribution unit can specifically include a fine adjustment range determination subunit, an intermediate torque acquisition subunit, an energy consumption sum determination subunit, and a target torque determination subunit. The fine adjustment range determination subunit is configured to determine a first numerical fine adjustment range according to the first initial demand torque, and determine a second numerical fine adjustment range according to the second initial demand torque. The first numerical fine adjustment range includes the first initial demand torque, and the second numerical fine adjustment range includes the second initial demand torque. The intermediate torque acquisition subunit is configured to acquire a plurality of first intermediate demand torques within the first numerical fine adjustment range, and acquire a plurality of second intermediate demand torques within the second numerical fine adjustment range. The first intermediate demand torques and the second intermediate demand torques are defined as a group of intermediate demand torques, and the sum of the first intermediate demand torques and the second intermediate demand torques is equal to the sum of the first initial demand torque and the second initial demand torque. The number of the first intermediate demand torques is the same as that of the second intermediate demand torques. The energy consumption sum determination subunit is configured to acquire the sum of the energy consumption of the tractor and the energy consumption of the trailer corresponding to each group of intermediate demand torques based on a preset mapping relationship between the energy consumption of the tractor and the torque, and a preset mapping relationship between the energy consumption of the trailer and the torque. The target torque determination subunit is configured to determine a group of intermediate demand torques corresponding to the minimum value of the sum of the energy consumption of the tractor and the energy consumption of the trailer, and define the first intermediate demand torque in the group of intermediate demand torques as the first target demand torque, and define the second intermediate demand torque in the group of intermediate demand torques as the second target demand torque.

[0099] Optionally, the energy consumption sum determination subunit can be specifically configured to determine a first intermediate demand power corresponding to the first intermediate demand torque based on a preset mapping relationship between the power of the tractor and the torque in each group of intermediate demand torques, and determine a second intermediate demand power corresponding to the second intermediate demand torque based on a preset mapping relationship between the power of the trailer and the torque. The energy consumption of the tractor corresponding to the first intermediate demand power is determined based on a preset mapping relationship between the energy consumption of the tractor and the power, and the energy consumption of the trailer corresponding to the second intermediate demand power is determined based on a preset mapping relationship between the energy consumption of the trailer and the power. The sum of the energy consumption of the tractor and the energy consumption of the trailer is calculated.

[0100] Optionally, a load detection unit is arranged in the tractor and / or the trailer. The information acquisition module 510 can specifically include a load signal acquisition unit and a load amount determination unit. The load signal acquisition unit is configured to acquire an electric signal generated when the load detection unit performs load detection. The load amount determination unit is configured to determine the load amount of the whole vehicle as an empty state, a half-loaded state, or a full-loaded state according to the electric signal generated by the load switch.

[0101] Optionally, the whole vehicle demand torque comprises a whole vehicle driving demand torque and a whole vehicle braking demand torque; the information acquisition module 510 specifically comprises a whole vehicle information acquisition unit, a whole vehicle state judgment unit, a driving demand determination unit and a braking demand determination unit, the whole vehicle information acquisition unit is used for acquiring a whole vehicle running speed, an accelerator pedal opening degree information and a brake pedal opening degree information; the whole vehicle state judgment unit is used for judging that the tractor and the trailer are in an acceleration state or a deceleration state according to the whole vehicle running speed, the accelerator pedal opening degree information and the brake pedal opening degree information; the driving demand determination unit is used for determining the whole vehicle driving demand torque according to at least the accelerator pedal opening degree information when the tractor and the trailer are in the acceleration state; and the braking demand determination unit is used for determining the whole vehicle braking demand torque according to at least the brake pedal opening degree information when the tractor and the trailer are in the deceleration state.

[0102] Optionally, the power distribution device further comprises a power control module, the power control module is used for controlling the tractor through the first target demand torque and controlling the trailer through the second target demand torque.

[0103] The power distribution device of the vehicle power system provided by the embodiment of the application can execute the power distribution method of the vehicle power system provided by any embodiment of the application, has the function modules and beneficial effects corresponding to the execution method.

[0104] Figure 9 is a structural schematic diagram of a terminal device provided by an embodiment of the application. The terminal device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The terminal device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, smart phones, wearable devices (such as helmets, glasses, watches, and the like), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not intended to limit the implementations of the applications described and / or claimed in this document.

[0105] As Figure 9As shown, the terminal device 100 includes one or more processors 110, and storage devices, such as a read-only memory (ROM) 120, a random access memory (RAM) 130, and the like, which are communicatively connected to the processor 110. The storage devices store computer programs that are executable by the one or more processors. The processor 110 can perform various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 120 or loaded from the storage unit 180 into the random access memory (RAM) 130. Various programs and data required for the operation of the terminal device 100 can also be stored in the RAM 130. The processor 110, the ROM 120, and the RAM 130 are connected to each other through a bus 140. An input / output (I / O) interface 150 is also connected to the bus 140.

[0106] Various components in the terminal device 100 are connected to the I / O interface 150, including an input unit 160, such as a keyboard, a mouse, and the like, an output unit 170, such as various types of displays, a speaker, and the like, a storage unit 180, such as a magnetic disk, an optical disk, and the like, and a communication unit 190, such as a network card, a modem, a wireless communication transceiver, and the like. The communication unit 190 allows the terminal device 100 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0107] The processor 110 can be various general and / or special purpose processing components with processing and computing capabilities. Some examples of the processor 110 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 appropriate processor, controller, microcontroller, and the like. The processor 110 performs various methods and processes described above, such as the power distribution method of the vehicle power system.

[0108] In some embodiments, the power distribution method of the vehicle power system can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 180. In some embodiments, part or all of the computer program can be loaded and / or installed onto the terminal device 100 via the ROM 120 and / or the communication unit 190. When the computer program is loaded into the RAM 130 and executed by the processor 110, one or more steps of the power distribution method of the vehicle power system described above can be performed. Alternatively, in other embodiments, the processor 110 can be configured to perform the power distribution method of the vehicle power system by any other appropriate means, such as by means of firmware.

[0109] The various embodiments of the systems and techniques described above can be implemented in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a load programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0110] Computer programs used to implement the processes of the application 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, special purpose computer, or other programmable data processing apparatus, such that the computer program, when executed, can cause instructions defined in the flow charts and / or block diagrams to be implemented. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a standalone software package and partially on a remote machine or entirely on a remote machine or server.

[0111] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store computer programs for use by or in connection with an instruction execution system, apparatus, or device. Computer-readable storage media can include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium will include one or more lines of electrical connections, portable computer disks, hard disk drives, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or Flash memory), optical fibers, portable compact disc read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0112] To provide for interaction with a user, the systems and techniques described here can be implemented on a terminal device having a display, e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor, for displaying information to the user and a keyboard and a pointing device, e.g., a mouse or a trackball, by which the user can provide input to the terminal device. Other kinds of devices can be used to provide for interaction with a user as well; 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 acoustic, speech, or tactile input.

[0113] The systems and techniques described here can be implemented in a computing system that includes a back end component, e.g., as a data server, or that includes a middleware component, e.g., an application server, or that includes a front end component, e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here, or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication, e.g., a communication network. Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0114] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. A server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0115] It should be understood that the various forms of flow shown above can be re-ordered, added to, or deleted from without departing from the scope of the present application. For example, the steps recited in the present application can be executed in parallel, executed in sequence, or executed in different orders, as long as the desired results of the technical solutions of the present application can be achieved, and the present application is not limited herein.

[0116] Note that the above merely describes preferred embodiments of the present application and the principles of the technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, modifications, combinations and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A power distribution method of a vehicle powertrain, characterized by, The vehicle power system is applied to a vehicle including a tractor and a trailer; The power distribution method comprises: Obtaining the whole vehicle load and the whole vehicle demand torque; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and the torque, and based on the preset mapping relationship between the trailer energy consumption and the torque, the whole vehicle demand torque is distributed to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and the torque is determined according to the engine universal characteristic map in the tractor and / or the universal characteristic map of the drive motor; the preset mapping relationship between the trailer energy consumption and the torque is determined according to the universal characteristic map of the drive motor in the trailer; According to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and obtaining the sum of the energy consumption of the tractor and the energy consumption of the trailer corresponding to each group of the intermediate demand torque based on the preset mapping relationship between the energy consumption and the torque of the tractor and based on the preset mapping relationship between the energy consumption and the torque of the trailer; determining a group of intermediate demand torques corresponding to the minimum sum of the energy consumption of the tractor and the energy consumption of the trailer, and defining the first intermediate demand torque in the group of intermediate demand torques as the first target demand torque and defining the second intermediate demand torque in the group of intermediate demand torques as the second target demand torque.

2. The power distribution method of claim 1, wherein, performing power distribution on the whole vehicle demand torque according to the whole vehicle load to determine a first initial demand torque corresponding to the tractor and a second initial demand torque corresponding to the trailer, including: determining a first torque distribution weight corresponding to the tractor and a second torque distribution weight corresponding to the trailer according to the whole vehicle load and a preset mapping relationship between the whole vehicle load and the whole vehicle torque distribution weight; determining the first initial demand torque and the second initial demand torque according to the whole vehicle demand torque, the first torque distribution weight, and the second torque distribution weight.

3. The power distribution method of claim 1, wherein, obtaining the sum of the energy consumption of the tractor and the energy consumption of the trailer corresponding to each group of the intermediate demand torque based on the preset mapping relationship between the energy consumption and the torque of the tractor and based on the preset mapping relationship between the energy consumption and the torque of the trailer, including: determining a first intermediate demand power corresponding to the first intermediate demand torque based on a preset mapping relationship between the tractor power and the torque and determining a second intermediate demand power corresponding to the second intermediate demand torque based on a preset mapping relationship between the trailer power and the torque in each group of the intermediate demand torque; determining the energy consumption of the tractor corresponding to the first intermediate demand power and the energy consumption of the trailer corresponding to the second intermediate demand power according to the preset mapping relationship between the energy consumption and the power of the tractor and according to the preset mapping relationship between the energy consumption and the power of the trailer, and calculating the sum of the energy consumption of the tractor and the energy consumption of the trailer.

4. The power distribution method of claim 1, wherein, In each group of the intermediate demand torque, the first intermediate demand torque is greater than the second intermediate demand torque.

5. The power distribution method of claim 1, wherein, The tractor and / or the trailer is provided with a load detection unit; obtaining the whole vehicle load, including: collecting an electric signal generated when the load detection unit performs load detection; determining the whole vehicle load to be in an empty state, a half-loaded state, or a full-loaded state according to the electric signal generated by the load switch.

6. The power distribution method of claim 1, wherein, The whole vehicle demand torque includes a whole vehicle driving demand torque and a whole vehicle braking demand torque; obtaining the whole vehicle demand torque, including: obtaining a whole vehicle driving speed, an accelerator pedal opening degree information, and a brake pedal opening degree information; determining that the tractor and the trailer are in an acceleration state or a deceleration state according to the whole vehicle driving speed, the accelerator pedal opening degree information, and the brake pedal opening degree information; determining the whole vehicle driving demand torque according to at least the accelerator pedal opening degree information when the tractor and the trailer are in the acceleration state; Determine the whole vehicle braking demand torque according to the brake pedal opening information when the tractor and the trailer are in deceleration state.

7. The power distribution method of claim 1, wherein, Distribute the whole vehicle demand torque according to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and torque, and the preset mapping relationship between the trailer energy consumption and torque, to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer, and further comprising: Control the tractor by the first target demand torque, and control the trailer by the second target demand torque.

8. A power distribution device of a vehicle powertrain, characterized by comprising: The vehicle power system is applied to a vehicle including a tractor and a trailer; The power distribution device includes: An information acquisition module for acquiring the whole vehicle load and the whole vehicle demand torque; A power distribution module for distributing the whole vehicle demand torque according to the whole vehicle load, and based on the preset mapping relationship between the tractor energy consumption and torque, and the preset mapping relationship between the trailer energy consumption and torque, to determine the first target demand torque corresponding to the tractor, and the second target demand torque corresponding to the trailer; wherein the sum of the energy consumption of the tractor corresponding to the first target demand torque and the energy consumption of the trailer corresponding to the second target demand torque is minimum; the preset mapping relationship between the tractor energy consumption and torque is determined according to the engine universal characteristic map and / or the universal characteristic map of the driving motor in the tractor; the preset mapping relationship between the trailer energy consumption and torque is determined according to the universal characteristic map of the driving motor in the trailer; The power distribution module specifically can include: An initial torque distribution unit and a target torque distribution unit, the initial torque distribution unit is used for distributing the whole vehicle demand torque according to the whole vehicle load, to determine the first initial demand torque corresponding to the tractor, and the second initial demand torque corresponding to the trailer; the target torque distribution unit is used for numerically adjusting the first initial demand torque based on the preset mapping relationship between the tractor energy consumption and torque, to determine the first target demand torque, and numerically adjusting the second initial demand torque based on the preset mapping relationship between the trailer energy consumption and torque, to determine the second target demand torque; wherein the sum of the first initial demand torque and the second initial demand torque is equal to the sum of the first target demand torque and the second target demand torque; The target torque distribution unit specifically can include: The fine adjustment range determining subunit, the intermediate torque obtaining subunit, the energy consumption sum determining subunit, and the target torque determining subunit, the fine adjustment range determining subunit is configured to determine a first numerical fine adjustment range corresponding to the first initial demand torque, and determine a second numerical fine adjustment range corresponding to the second initial demand torque; the first numerical fine adjustment range includes the first initial demand torque, and the second numerical fine adjustment range includes the second initial demand torque; the intermediate torque obtaining subunit is configured to obtain a plurality of first intermediate demand torques in the first numerical fine adjustment range, and obtain a plurality of second intermediate demand torques in the second numerical fine adjustment range, and define the first intermediate demand torques and the second intermediate demand torques whose sum is equal to the sum of the first initial demand torque and the second initial demand torque as a group of intermediate demand torques; the number of the first intermediate demand torques is the same as the number of the second intermediate demand torques; the energy consumption sum determining subunit is configured to obtain the sum of the energy consumption of the tractor and the energy consumption of the trailer corresponding to each group of intermediate demand torques based on a preset mapping relationship between the energy consumption and the torque of the tractor, and based on a preset mapping relationship between the energy consumption and the torque of the trailer; the target torque determining subunit is configured to determine a group of intermediate demand torques corresponding to the minimum value of the sum of the energy consumption of the tractor and the energy consumption of the trailer, and define a first intermediate demand torque in the group of intermediate demand torques as a first target demand torque, and define a second intermediate demand torque in the group of intermediate demand torques as a second target demand torque.

9. A terminal device, comprising: comprising: one or more processors; a memory device for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the power distribution method of the vehicle power system according to any one of claims 1-7.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the power distribution method of the vehicle power system according to any one of claims 1-7.

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