Preventive Maintenance Strategy Of Automobile Detection System

Comprehensive performance testing automotive transportation sector at all levels to implement Comprehensive performance testing automotive transportation sector at all levels to implement an important aspect of vehicle management. Vehicle detection is the state of automotive technology to determine the ability of the inspection or work. Vehicles after a long-term use, the gradual deterioration of the situation of its technical, economic and variation, power is reduced and the reliability of the less poor. If a certain cycle in accordance with the laws of the state of technology to test the vehicle and take the appropriate maintenance measures to extend the service life of motor vehicles, automotive technology to improve performance, improve security, the prevention of traffic accidents, reduce environmental pollution, the protection of people's lives and property security, enhance people's health are of great significance.Vehicle detection system is a large and complex system of mechanical and electrical integration, testing process often can not be adjusted down to repair the system would lead to breakdown of the change detection data so as to accuracy and notarization of the loss. And have asked the system must have high reliability, if the system broke down in a short period of time also have to make it back to normal.This article on how to advance through the appropriate maintenance to improve the reliability of vehicle detection system is studied. The work of the main contents and conclusions are summarized as follows:1. Vehicle detection systems, functions, a brief classification. In order to meet the thesis behind the needs of the development of maintenance plan, car detection system This article is divided into 10 sub-systems. Detection system performance, including braking, wheel (axle) load detection system, headlamp detection system, the speed table detection system, exhaust pollutants (noise) detection system, the wheel position detection system, vehicle sideslip detection system, car hanging performance test aircraft systems, space vehicle detection system chassis, automobile chassis dynamometer systems.2. Vehicle detection system failure data collection.Drawing a unified fault detection system automotive data collection sheet to determine the data collection requirements, collection methods and classification methods, the establishment of a database failure.3. A brief account of the failure of several common distribution function, in this based on the established distribution model of time between failures, vehicle detection systems to establish where the fault current period, the analysis of failure occurred in the frequency and severity of consequences, based on reliable and maximum availability of the principle of minimum maintenance cycle.In this paper, based on fault analysis and maintenance of the law, combined with vehicle inspection system structure and principle, the principle of the system maintenance and availability based on the maximum principle and the principle of establishing the reliability of the system maintenance strategy for pre-detection system. The three northeastern provinces in the actual operation of automobile testing line data analysis of a large number of failures to deal with on the basis of the preliminary estimate of vehicle time between failure detection system consistent with the Weibull distribution model, and the distribution of time between failures fitting model studies, using the least square method for parameter estimation. Analysis and Comparison of test and d test, the final choice d test Weibull distribution model of hypothesis testing to determine the time between failures of the system in line with the Weibull distribution model. At the same time, under the Weibull shape parameter of the system to determine where the fault period. Analysis to determine the optimum maintenance cycle in three ways: based on the principle of maximum effectiveness, based on the principle of minimum cost, based on the principle of the greatest reliability, and ultimately the most effective degree of adoption of the principle of the best maintenance cycle of the system.4. The first time established a pre-maintenance program to develop the theory and principles.In determining the maintenance interval to take into account both the seriousness of the consequences of failure and ease of maintenance and vehicle chassis dynamometer as an example of how the development of pre-maintenance program. For the realization of the pre-rational and effective maintenance program provides a theoretical basis.5. The first time the establishment of pre-maintenance vehicle detection system database so that testing station staff in accordance with established maintenance program in accordance with the vehicle detection system of the pre-maintenance, resource sharing, so that the pre-automotive testing equipment maintenance has played its due role.