Four-wheel drive transmission system torsional strength test experiment method and evaluation method
A technology of torsional strength and testing experiments, which is applied in vehicle testing, force/torque/power measuring instruments, machine/structural component testing, etc., can solve problems such as no special verification, improve product quality, and reduce user complaints Effect
Pending Publication Date: 2022-07-12
CHINA FIRST AUTOMOBILE
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Problems solved by technology
In the new product development process of various domestic OEMs, there is no special verification test method for the development and verification of the torsional strength of the cyclic torque that occurs when the off-road vehicle is engaged in low-speed four-wheel drive and large turn.
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Embodiment Construction
[0070] In order to better understand the purpose and content of the present invention, a method for testing the torsional strength of a four-wheel drive vehicle drive train and an evaluation method of the present invention will be described in further detail below with reference to the accompanying drawings.
[0071] (1) Main objects of assessment
[0072] The present invention mainly examines the torsional strength of the cyclic torque that occurs when the off-road vehicle is mounted on a low-speed four-wheel drive to make a big turn.
[0073] (2) Preparation of experimental conditions
[0074] Usually, a set of four-wheel drive transmission system will be equipped with multiple models, of which the total vehicle mass, wheel radius, and differential speed ratio are three important parameters that affect the strength. Choose W when experimenting r The vehicle with the largest ×r / i can achieve a more enveloping assessment effect. of which: W r Represents the total mass of t...
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The invention relates to a four-wheel drive transmission system torsional strength test experiment method and an evaluation method. The device is used for simulating the use of a real user to test and evaluate the torsional strength of the four-wheel-drive vehicle transmission system in the research and development stage of a vehicle factory before the vehicle is put on the market. The vehicle with the maximum Wr * r / i is selected in the testing process, Wr represents the total mass of the vehicle, r represents the wheel radius, i represents the rear axle speed ratio, and the vehicle needs to be fully loaded. After the test system is constructed, driving is performed according to the set driving working condition, and the obtained corresponding data and the automobile condition are evaluated, so that the evaluation on the torsional strength of the four-wheel-drive transmission system is obtained. According to the method, the use working condition of a user can be truly simulated, problems can be effectively identified and fully exposed when the test is carried out in the vehicle research and development stage, and unqualified items identified in the test are rectified and optimized. The purpose of accurately verifying and evaluating the torsional strength of the four-wheel drive transmission system in the research and development stage is achieved, the product quality is improved, and user complaints are reduced.
Description
technical field [0001] The invention relates to the field of vehicle quality inspection, and provides an experimental method and an evaluation method for testing the torsional strength of a four-wheel drive drive train. Background technique [0002] Four-wheel drive (4WD, Four Wheel Drive) means that the front and rear wheels of the car have power, and the output torque of the engine can be distributed to all the front and rear wheels in different proportions according to the different road conditions to improve the driving ability of the car. [0003] The main functions of the four-wheel drive system are: [0004] (1) Improve passability [0005] The four-wheel drive off-road vehicle can distribute the engine power to the four wheels, and offset the speed difference between the different wheels through the differential. . [0006] (2) Improve the ability to get out of trouble [0007] In the face of some rough and muddy roads, the four-wheel drive system can bring a mor...
Claims
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IPC IPC(8): G01L5/00G01M17/007
CPCG01L5/00G01M17/007Y02T90/00
Inventor 刘占国王世英张立博
Owner CHINA FIRST AUTOMOBILE