Method, device and equipment for testing mechanical resistance generated by wheel transmission system

Abstract

The invention provides a method, device and equipment for testing mechanical resistance generated by a wheel transmission system, and belongs to the technical field of tire resistance test.Before and after a standard inertia disc is not installed on a to-be-tested wheel, the average deceleration of each wheel at the test speed is measured, so that the mechanical resistance generated by the to-be-tested wheel is measured; the first wheel average deceleration and the second wheel average deceleration are obtained; determining the system rotational inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration and the rotational inertia of the standard inertia disc; based on the system rotational inertia of each wheel and the first wheel average deceleration, the transmission system mechanical resistance torque of each wheel is determined; the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel is calculated as the mechanical resistance generated by the transmission system of each wheel to the rotation of the wheel, and due to the zero load of the vehicle in the measurement process, the mechanical resistance of the transmission system of each wheel is effectively obtained through the wheel deceleration measurement before and after the installation of the standard inertia disc.

Description

Technical Field

[0001] The present invention relates to the technical field of tire resistance testing, and in particular to a method, device and equipment for testing the mechanical resistance generated by a wheel transmission system. Background Art

[0002] Wheel rolling resistance testing assesses the resistance encountered by a wheel during rolling, including internal friction within the wheel material, friction between the wheel and the road or trail, and the aerodynamic effects of the wheel's shape and structure. Rolling resistance is a key factor affecting vehicle performance and fuel economy. The test method requires loading the vehicle, and the measured resistance includes the mechanical resistance of the vehicle's drivetrain and the rolling resistance of the wheels—the combined force of these two forces. This lacks effective guidance for technical analysis and research.

[0003] Therefore, how to accurately test the mechanical resistance of an automobile transmission system has become a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The present invention provides a method, device and equipment for testing the mechanical resistance generated by a wheel transmission system, so as to solve the defect in the prior art that the mechanical resistance of the wheel transmission system cannot be accurately measured.

[0005] In a first aspect, the present invention provides a method for testing mechanical resistance generated by a wheel transmission system, comprising: Before the standard inertia disc is installed on the wheel to be tested, the average deceleration of each wheel at the test speed is measured to obtain the first average wheel deceleration; After the standard inertia disc is installed on the wheel to be tested, the average deceleration of each wheel at the test speed is measured to obtain the second wheel average deceleration; determining a system moment of inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration, and the moment of inertia of the standard inertia disk; determining a driveline mechanical resistance torque of each wheel based on the system rotational inertia of each wheel and the first average wheel deceleration; The ratio of the mechanical resistance torque to the wheel rolling radius of each wheel is calculated as the mechanical resistance generated by the transmission system of each wheel to the wheel rotation.

[0006] According to a method for testing mechanical resistance generated by a wheel transmission system provided by the present invention, measuring the average deceleration of each wheel at a test speed includes: Place the vehicle on the chassis dynamometer and keep the wheels aligned with the vertical line of the drum; Put the vehicle in neutral gear, accelerate the chassis dynamometer drum to a speed higher than the test speed, and measure the rolling radius of each wheel; Lift the vehicle horizontally so that the wheels leave the ground and the drum surface. When the wheels are in a zero-load free state, measure the deceleration of each wheel. Determine the average deceleration of each wheel at the test speed.

[0007] A method for testing mechanical resistance generated by a wheel transmission system according to the present invention further includes: When the average deceleration is obtained before the wheel to be tested is installed with a standard inertia disc, the average deceleration is determined to be the average deceleration of the first wheel; When the average deceleration is obtained after the wheel to be tested is installed with a standard inertia disc, the average deceleration is determined to be the second wheel average deceleration.

[0008] According to a method for testing mechanical resistance generated by a wheel transmission system provided by the present invention, measuring the deceleration of each wheel includes: The non-contact wheel speed sensor measures the real-time rotation data of each wheel during rotation; Based on the rotational data, the deceleration of each wheel is determined.

[0009] According to a method for testing mechanical resistance generated by a wheel transmission system provided by the present invention, before measuring the average deceleration of each wheel at a test speed, the method further includes: Determine the wheel radius, hub diameter, rim width, individual wheel mass and mass distribution of the wheel to be tested; determining a wheel moment of inertia based on the wheel radius, hub diameter, rim width, individual wheel mass, and mass distribution; According to the wheel rotational inertia, a standard inertia disk of target size and structure is designed.

[0010] According to a method for testing the mechanical resistance generated by a wheel transmission system provided by the present invention, the method includes designing a standard inertia disk of target size and structure according to the rotational inertia of the wheel, comprising: determining a moment of inertia of the inertia disc that is in a predetermined ratio to the moment of inertia of the wheel; If the structure of the standard inertia disk is a solid disk, the mass and radius of the inertia disk are determined according to the rotational inertia of the inertia disk.

[0011] A method for testing mechanical resistance generated by a wheel transmission system according to the present invention further includes: When the mass of the standard inertia disc exceeds a preset mass, the structure of the standard inertia disc is adjusted to a combined design of a central shaft and an outer ring counterweight.

[0012] A method for testing mechanical resistance generated by a wheel transmission system according to the present invention further includes: Determine the total wheel drag for each wheel; The rolling resistance of each wheel is obtained by subtracting the mechanical resistance of the corresponding wheel from the total wheel resistance.

[0013] In a second aspect, the present invention further provides a device for testing mechanical resistance generated by a wheel transmission system, comprising: a measuring module configured to measure the average wheel deceleration of each wheel at a test speed before the wheel to be tested is installed with a standard inertia disc to obtain a first average wheel deceleration; and to measure the average wheel deceleration of each wheel at the test speed after the wheel to be tested is installed with a standard inertia disc to obtain a second average wheel deceleration; a determination module, configured to determine a system moment of inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration, and the moment of inertia of the standard inertia disk; and determine a transmission system mechanical resistance torque of each wheel based on the system moment of inertia of each wheel and the first wheel average deceleration; The calculation module is used to calculate the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel as the mechanical resistance generated by the transmission system of each wheel to the wheel rotation.

[0014] In a third aspect, the present invention further provides an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for testing the mechanical resistance generated by a wheel transmission system as described in any one of the above is implemented.

[0015] In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for testing the mechanical resistance generated by a wheel transmission system as described in any one of the above.

[0016] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, which implements any one of the above-mentioned XXXX methods when executed by a processor.

[0017] The present invention provides a method, device, and apparatus for testing the mechanical resistance generated by a wheel transmission system. The method comprises the following steps: measuring the average wheel deceleration of each wheel at a test speed before a standard inertia disc is installed on the wheel to be tested to obtain a first wheel average deceleration; measuring the average wheel deceleration of each wheel at a test speed after the standard inertia disc is installed on the wheel to be tested to obtain a second wheel average deceleration; determining the system rotational inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration, and the rotational inertia of the standard inertia disc; determining the mechanical resistance torque of the transmission system of each wheel based on the system rotational inertia of each wheel and the first wheel average deceleration; and calculating the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel as the mechanical resistance generated by the transmission system of each wheel to wheel rotation. Since the vehicle is zero-loaded during the measurement process, the mechanical resistance of the transmission system of each wheel is effectively obtained by measuring the wheel deceleration before and after the standard inertia disc is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 1 is a flow chart of a method for testing mechanical resistance generated by a wheel transmission system provided in this embodiment; Figure 2 Schematic diagram of the structure of the automobile resistance test device provided in this embodiment; Figure 3 is a schematic structural diagram of a tire rim assembly provided in this embodiment; Figure 4 This is a schematic structural diagram of a standard inertia disc mounted on a wheel provided in this embodiment; Figure 5 2 is a schematic structural diagram of a testing device for mechanical resistance generated by a wheel transmission system provided in this embodiment; Figure 6 Schematic diagram of the structure of the electronic device provided in this embodiment. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] Figure 1 FIG. 1 is a flow chart of a method for testing the mechanical resistance generated by a wheel transmission system provided in this embodiment. Figure 2 is a structural diagram of the automobile resistance test device provided in this embodiment, Figure 3 is a schematic structural diagram of the tire rim assembly provided in this embodiment, Figure 4 It is a structural schematic diagram of the standard inertia disc installed on the wheel provided in this embodiment.

[0022] like Figure 1 As shown, the method for testing the mechanical resistance generated by the wheel transmission system provided by the embodiment of the present invention mainly includes the following steps: 101. Before the wheel to be tested is installed with a standard inertia disc, the average wheel deceleration of each wheel at the test speed is measured to obtain a first average wheel deceleration.

[0023] In a specific implementation process, such as Figure 2 As shown, a wheel speed sensor, such as a non-contact type, is installed on the outside of each wheel. This sensor is then connected to a computer to record wheel speed and acceleration and deceleration in real time. Using the deceleration method with a standard inertia disc, the deceleration before and after the standard inertia disc is installed is measured at zero load. The rotational inertia and mechanical resistance of the drivetrain at each wheel are then calculated.

[0024] Therefore, before the standard inertia disc is installed, a wheel test is performed to obtain the first wheel average deceleration, which is recorded as ω1.

[0025] After the standard inertia disc is installed on the wheel to be tested, the average deceleration of each wheel at the test speed is measured to obtain the second average deceleration of the wheel.

[0026] After obtaining ω1, Figure 3 and Figure 4 As shown, a standard inertia disc is installed on the wheel, and then the test is performed again to obtain the average deceleration of the second wheel after the standard inertia disc is installed, which is recorded as ω2.

[0027] The specific implementation method for measuring the average wheel deceleration at the test speed follows the same process before and after installing the standard inertia disc: The vehicle is placed on a chassis dynamometer, with the wheels aligned perpendicular to the drum, and loaded. The vehicle is shifted into neutral, and the chassis dynamometer drum is accelerated to a speed higher than the test speed, for example, 80 km / h + 5 km / h. The rolling radius r and resistance of each wheel are measured. The vehicle is then lifted horizontally using a lift, lifting the wheels off the ground and the drum surface. When the wheels are in a free state with zero load, the deceleration of each wheel is measured.

[0028] Determine the average deceleration of each wheel at the test speed (e.g., 80 km / h). This means that if the average deceleration is obtained before the standard inertia disc is installed on the test wheel, the first wheel average deceleration is ω1. If the average deceleration is obtained after the standard inertia disc is installed, the second wheel average deceleration is ω2.

[0029] 103. Determine the system moment of inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration, and the moment of inertia of the standard inertia disk.

[0030] Specifically, after obtaining the average deceleration of the first wheel ω1 and the average deceleration of the second wheel ω2, since the rotational inertia of the standard inertia disk is known and recorded as I, the system rotational inertia of each wheel can be calculated using formula (1): I0=I*ω2 / (ω1-ω2)(1) Where I0 represents the system rotational inertia of the wheel, including the tire, rim, bolts, brake disc, and all transmission system linkage components such as axles, gears, and bearings; I represents the rotational inertia of the standard inertia disc; ω1 represents the first average wheel deceleration, that is, the average wheel deceleration when the standard inertia disc is not installed; ω2 represents the second average wheel deceleration, that is, the average wheel deceleration when the standard inertia disc is installed.

[0031] 104. Determine the transmission system mechanical resistance torque of each wheel based on the system rotational inertia of each wheel and the first wheel average deceleration.

[0032] Specifically, after obtaining the system rotational inertia of each wheel, the mechanical resistance torque of the transmission system of each wheel is calculated using formula (2); T0=I0*ω1(2) Wherein, T0 represents the mechanical resistance torque of the wheel transmission system.

[0033] 105. Calculate the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel as the mechanical resistance generated by the transmission system of each wheel to the wheel rotation.

[0034] Specifically, by using formula (3), the mechanical resistance of the transmission system of each wheel position to the tire rotation can be calculated: F0=T0 / r(3) Among them, F0 represents the mechanical resistance generated by the wheel transmission system to the rotation of the tire; r represents the rolling radius of the tire.

[0035] The method of this embodiment uses the deceleration method in conjunction with a standard inertia disk. By measuring the deceleration of the wheels before and after the standard inertia disk is installed when the vehicle is zero-loaded, the rotational inertia and mechanical resistance of the transmission system of each wheel position when the vehicle is zero-loaded are calculated using a formula, effectively separating the mechanical resistance from the rolling resistance.

[0036] Furthermore, based on the above embodiment, this embodiment also includes: determining the total wheel resistance of each wheel; and subtracting the mechanical resistance of the corresponding wheel from the total wheel resistance to obtain the rolling resistance of each wheel.

[0037] Specifically, since the mechanical resistance has been successfully calculated, the wheel rotational resistance of each wheel position of the car can be measured using equipment such as a chassis dynamometer. The rolling resistance of the tire can be obtained by subtracting the mechanical resistance of the transmission system of that wheel position.

[0038] Furthermore, before measuring the average deceleration of each wheel at the test speed, this embodiment also includes how to set corresponding standard inertia discs for different wheels.

[0039] Specifically, first clarify the goals and requirements. The goal: to match a standard inertia disc for wheel speed testing to simulate the inertial loads experienced by actual vehicle driving, ensuring that test results reflect real-world operating conditions. Requirements include: wheel parameters: including mass, radius, moment of inertia, and hub size; test conditions: speed range (e.g., 0-120 km / h), acceleration requirements, and test equipment (e.g., chassis dynamometer); and standard inertia disc characteristics: inertia value, material, dimensions, and installation compatibility.

[0040] Then the wheel information is collected and analyzed. Specifically, key parameters are first obtained, including geometric parameters: wheel radius R, hub diameter, and rim width; mass parameters: single wheel mass m, and mass distribution (the moment of inertia can be estimated through 3D modeling or experimental measurement).

[0041] Once the wheel radius, hub diameter, rim width, single wheel mass and mass distribution are obtained, the moment of inertia can be calculated.

[0042] In the simplified model, the wheel can be regarded as a homogeneous ring or solid disk, and the moment of inertia I is calculated as: Torus Model: ; Solid disk model: ; When the mass distribution is non-uniform, the actual moment of inertia must be measured through experiments (such as the torsion pendulum method).

[0043] Example: The mass of a wheel is m=15kg, and the radius is R=0.3m. According to the torus model, the inertia is I=15* =1.35kg·m².

[0044] After obtaining the target wheel moment of inertia, it is necessary to design a standard inertia disk of target size and structure based on the wheel moment of inertia.

[0045] Specifically, determine the inertia of the inertia disc at a preset ratio to the wheel's moment of inertia. This means the disc's moment of inertia must be consistent with or proportional to the wheel's moment of inertia (e.g., to simulate the equivalent inertia of the entire vehicle). If the test system requires full vehicle inertia simulation (e.g., a chassis dynamometer), the equivalent inertia must be calculated based on the vehicle's mass and wheel radius.

[0046] Then, the inertia disk is designed. The material selection is usually cast iron or steel (high density, which can reduce the volume). For the size calculation, it needs to be determined according to the specific structure of the inertia disk. If the standard inertia disk structure is a solid disk, the mass and radius of the inertia disk are determined based on the inertia of the inertia disk, as shown in (4): (4) in, represents the moment of inertia of the designed inertia disk, represents the mass of the solid disk, Represents the radius of the solid disk.

[0047] If you need to set the radius =0.2m, then: (5) It was determined that the designed inertia disk is a solid circular disk with a radius of 0.2m and a mass of 67.5kg. The design of the inertia disk meets the rotational inertia test design of wheel mass m=15kg and radius R=0.3m.

[0048] Through calculation, it is found that if the mass of the inertia disc is too large, when the mass of the standard inertia disc exceeds the preset mass, the structure of the standard inertia disc is adjusted to a combined design of a central shaft and an outer ring counterweight block.

[0049] After the inertia disc design is complete, it can be verified and tested, which can be divided into empirical verification and dynamic testing. Static verification includes measuring the actual rotational inertia of the inertia disc (such as through a torsion pendulum test or the three-wire pendulum method) and checking the dynamic balance after installation to avoid vibration during high-speed testing. Dynamic testing involves replacing the wheel with the inertia disc, installing it on a dynamometer, running speed tests (such as 0-120 km / h acceleration and constant-speed energy consumption tests), recording torque, power, and other data, comparing the theoretical inertia with the actual load, and adjusting the inertia disc parameters if necessary.

[0050] Finally, errors are analyzed and corrected. Potential error sources include: simplified wheel inertia models (actual non-uniformity), inertia plate mounting clearance or friction loss, and dynamometer control accuracy (e.g., inertia compensation algorithm). Correction methods include: calibrating actual inertia through experiments (e.g., step response method), using sensors (e.g., encoders) to monitor speed and torque in real time, and dynamically adjusting inertia simulation.

[0051] For example, the wheel mass is 12kg, the radius is 0.28m, the measured moment of inertia, and the test speed range is: 0-100km / h.

[0052] Inertia disc design: Choose cast iron (7800kg / ), designed as a solid disk with an outer diameter of 0.25m and a thickness of 0.05m:

[0053] Therefore, the mass of the inertia disc is 76.54 kg. You can choose to stack multiple inertia discs or add counterweights to meet your needs.

[0054] Based on the same general inventive concept, the present invention also protects a testing device for the mechanical resistance generated by a wheel transmission system. The testing device for the mechanical resistance generated by a wheel transmission system described below and the testing method for the mechanical resistance generated by a wheel transmission system described above can refer to each other.

[0055] Figure 5 Schematic diagram of the structure of the testing device for the mechanical resistance generated by the wheel transmission system provided in this embodiment.

[0056] like Figure 5 As shown, this embodiment provides a testing device for mechanical resistance generated by a wheel transmission system, comprising: The measuring module 501 is configured to measure the average wheel deceleration of each wheel at a test speed before the standard inertia disc is installed on the wheel to be tested, to obtain a first average wheel deceleration; and to measure the average wheel deceleration of each wheel at the test speed after the standard inertia disc is installed on the wheel to be tested, to obtain a second average wheel deceleration; a determination module 502 for determining a system moment of inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration, and the moment of inertia of the standard inertia disk; and determining a transmission system mechanical resistance torque of each wheel based on the system moment of inertia of each wheel and the first wheel average deceleration; The calculation module 503 is used to calculate the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel as the mechanical resistance generated by the transmission system of each wheel to the wheel rotation.

[0057] Figure 6Schematic diagram of the structure of the electronic device provided in this embodiment.

[0058] like Figure 6 As shown, the electronic device may include: a processor (processor) 610, a communication interface (Communications Interface) 620, a memory (memory) 630 and a communication bus 640, wherein the processor 610, the communication interface 620, and the memory 630 communicate with each other through the communication bus 640. The processor 610 can call the logic instructions in the memory 630 to execute a test method for the mechanical resistance generated by the wheel transmission system, the method comprising: before the wheel to be tested is installed with a standard inertia disk, measuring the average wheel deceleration of each wheel at a test speed to obtain a first wheel average deceleration; after the wheel to be tested is installed with a standard inertia disk, measuring the average wheel deceleration of each wheel at the test speed to obtain a second wheel average deceleration; determining the system rotational inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration and the rotational inertia of the standard inertia disk; determining the mechanical resistance torque of the transmission system of each wheel based on the system rotational inertia of each wheel and the first wheel average deceleration; and calculating the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel as the mechanical resistance generated by the transmission system of each wheel on the wheel rotation.

[0059] Furthermore, the logic instructions in the aforementioned memory 630 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0060] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the test method for the mechanical resistance generated by the wheel transmission system provided by the above methods, the method including: before the standard inertia disc is installed on the wheel to be tested, measuring the average wheel deceleration of each wheel at the test speed to obtain a first wheel average deceleration; after the standard inertia disc is installed on the wheel to be tested, measuring the average wheel deceleration of each wheel at the test speed to obtain a second wheel average deceleration; determining the system rotational inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration and the rotational inertia of the standard inertia disc; determining the mechanical resistance torque of the transmission system of each wheel based on the system rotational inertia of each wheel and the first wheel average deceleration; and calculating the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel as the mechanical resistance generated by the transmission system of each wheel to the wheel rotation.

[0061] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the test method for the mechanical resistance generated by the wheel transmission system provided by the above-mentioned methods, the method comprising: before the standard inertia disc is installed on the wheel to be tested, measuring the average wheel deceleration of each wheel at the test speed to obtain a first wheel average deceleration; after the standard inertia disc is installed on the wheel to be tested, measuring the average wheel deceleration of each wheel at the test speed to obtain a second wheel average deceleration; determining the system rotational inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration and the rotational inertia of the standard inertia disc; determining the mechanical resistance torque of the transmission system of each wheel based on the system rotational inertia of each wheel and the first wheel average deceleration; and calculating the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel as the mechanical resistance generated by the transmission system of each wheel to the wheel rotation.

[0062] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0063] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for testing the mechanical resistance generated by a wheel transmission system, characterized in that: include: Before the standard inertia disc is installed on the wheel to be tested, the average deceleration of each wheel at the test speed is measured to obtain the first average wheel deceleration; After the standard inertia disc is installed on the wheel to be tested, the average deceleration of each wheel at the test speed is measured to obtain the second wheel average deceleration; determining a system moment of inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration, and the moment of inertia of the standard inertia disk; determining a driveline mechanical resistance torque of each wheel based on the system rotational inertia of each wheel and the first average wheel deceleration; The ratio of the mechanical resistance torque to the wheel rolling radius of each wheel is calculated as the mechanical resistance generated by the transmission system of each wheel to the wheel rotation.

2. The method for testing the mechanical resistance generated by the wheel transmission system according to claim 1, characterized in that: The measuring of the average deceleration of each wheel at the test speed includes: Place the vehicle on the chassis dynamometer and keep the wheels aligned with the vertical line of the drum; Put the vehicle in neutral gear, accelerate the chassis dynamometer drum to a speed higher than the test speed, and measure the rolling radius of each wheel; Lift the vehicle horizontally so that the wheels leave the ground and the drum surface. When the wheels are in a zero-load free state, measure the deceleration of each wheel. Determine the average deceleration of each wheel at the test speed.

3. The method for testing the mechanical resistance generated by the wheel transmission system according to claim 2, characterized in that: Also includes: When the average deceleration is obtained before the wheel to be tested is installed with a standard inertia disc, the average deceleration is determined to be the average deceleration of the first wheel; When the average deceleration is obtained after the wheel to be tested is installed with a standard inertia disc, the average deceleration is determined to be the second wheel average deceleration.

4. The method for testing the mechanical resistance generated by the wheel transmission system according to claim 2, characterized in that: The measuring of the deceleration of each wheel includes: The non-contact wheel speed sensor measures the real-time rotation data of each wheel during rotation; Based on the rotational data, the deceleration of each wheel is determined.

5. The method for testing the mechanical resistance generated by the wheel transmission system according to claim 1, characterized in that: Before measuring the average deceleration of each wheel at the test speed, the method further includes: Determine the wheel radius, hub diameter, rim width, individual wheel mass and mass distribution of the wheel to be tested; determining a wheel moment of inertia based on the wheel radius, hub diameter, rim width, individual wheel mass, and mass distribution; According to the wheel rotational inertia, a standard inertia disk of target size and structure is designed.

6. The method for testing the mechanical resistance generated by the wheel transmission system according to claim 5, characterized in that: The method of designing a standard inertia disk of target size and structure according to the wheel rotational inertia comprises: determining a moment of inertia of the inertia disc that is in a predetermined ratio to the moment of inertia of the wheel; If the structure of the standard inertia disk is a solid disk, the mass and radius of the inertia disk are determined according to the rotational inertia of the inertia disk.

7. The method for testing the mechanical resistance generated by the wheel transmission system according to claim 6, characterized in that: Also includes: When the mass of the standard inertia disc exceeds a preset mass, the structure of the standard inertia disc is adjusted to a combined design of a central shaft and an outer ring counterweight.

8. The method for testing the mechanical resistance generated by a wheel transmission system according to any one of claims 1 to 7, characterized in that: Also includes: Determine the total wheel drag for each wheel; The rolling resistance of each wheel is obtained by subtracting the mechanical resistance of the corresponding wheel from the total wheel resistance.

9. A device for testing the mechanical resistance generated by a wheel transmission system, characterized in that: include: a measuring module, configured to measure the average wheel deceleration of each wheel at a test speed before the standard inertia disc is installed on the wheel to be tested, to obtain a first average wheel deceleration; After the standard inertia disc is installed on the wheel to be tested, the average deceleration of each wheel at the test speed is measured to obtain the second wheel average deceleration; a determining module, configured to determine a system moment of inertia of each wheel based on the first wheel average deceleration, the second wheel average deceleration, and the moment of inertia of the standard inertia disk; determining a driveline mechanical resistance torque of each wheel based on the system rotational inertia of each wheel and the first average wheel deceleration; The calculation module is used to calculate the ratio of the mechanical resistance torque to the wheel rolling radius of each wheel as the mechanical resistance generated by the transmission system of each wheel to the wheel rotation.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for testing the mechanical resistance generated by the wheel transmission system according to any one of claims 1 to 8 is implemented.

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