Method of testing vehicle electric appliance system reliability

Abstract

A reliability test method for automobile electrical systems is characterized in that an automotive electrical appliance is connected with the automobile's original wire harnesses according to the actual application condition, thereby generating an automobile electrical system which can be tested in the actual working condition on the test stand just like the system is installed in a running automobile. The automobile electrical system is taken as the test subject; a vibration controller with the time domain signal replication function is used to implement the reliability test; the road spectrum data of vibration severity of the automobile on a road is taken as the input data for the vibration controller in order to have the electromagnetic vibration stand to produce vibration excitation and simulate the road excitation occurred in the process of automobile road test; and the automobile electrical system is monitored, the reliability test is finished, and the test result can be evaluated. The invention has the advantages that the uncontrollable factors during the process of a road test can be avoided and the reliable and complete test date can be obtained. The invention is of great importance to the system development of automobile products, the related quality control and the design improvement.

Description

technical field [0001] The invention relates to a method for testing reliability of an automobile electrical system. Background technique [0002] In the automobile manufacturing industry, the performance of automobile electrical appliances plays a vital role in the quality of the whole vehicle. Before assembly, automobile manufacturers must conduct a series of strict inspections on various electrical components and assemblies produced by supporting manufacturers. To ensure that the technical indicators of components and assemblies meet the relevant national and enterprise technical standards. [0003] The current status of the domestic auto industry in terms of product development and quality control testing is as follows: [0004] First, the main way to conduct reliability tests for the entire vehicle and subsystems is the actual vehicle road test. This kind of test is the test method closest to the real working conditions of the car. It is simple and easy to implement, ...

AI Technical Summary

Problems solved by technology

This kind of test is the test method closest to the real working conditions of the car. It is simple and easy to implement, but there are many uncontrollable factors. The test process is easily affected by factors such as weather, road conditions, and the quality of the test personnel; Lack of completeness and consistency; costly and lengthy trials

[0005] Second, as far as the bench test is concerned, the existing bench test methods and equipment for automotive electrical appliances are mainly aimed at a single component or subsystem. Compared with the whole vehicle electrical system, its essence is an offline test method. Single and unable to assess the reliability of the system as a whole

At present, there is still a lack of methods and equipment that can conduct reliability tests on the electrical system of the vehicle without the actual vehicle

[0006] Third, the existing road test methods and bench test methods all lack corresponding monitoring methods and equipment to monitor and record the test process in the process of testing the automotive electrical system; it is impossible to obtain sufficient and reliable information from the test. Data is used as the basis for product failure mechanism analysis, which is not conducive to design improvement and product quality control

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