Study On Scheme And Technology Of Inspection And Maintenance Program About In-use Vehicle In Xi'an City

It has been realized by people to control the vehicle emissions in order to get a good air surroundings. Now various methods on vehicle emission control have been taken throughout the world: one way is to formulate more and more stringent regulations and standards for vehicle pollutions; the other way is to develop new technology about automobile emission control. Vehicle emission control is a complicated system, and involves a variety of factors such as manufacture of vehicle, automobile use and maintenance, road traffic management, fuel and oil quality and revenue policies etc. In China, present emission regulation of in-use vehicle is more loose and incapable, so it becomes urgent to take more effective methods on in-use vehicle emission control. The experience o f developed countries indicates that I/M program, short for Inspection and Maintenance program, is the most scientific, economical and efficient measure to control emission from in-use vehicle.First of all, this article introduces the present situation abroad of vehicle pollution control, and emphasizes the meaning, history and content of I/M program. Secondly, focusing on the emission standard of in-use cars and vehicle maintenance specification in China, the paper discusses the correlation between I/M program and maintenance specification. Thirdly, after investigating the status of air environment and vehicle pollution in Xi'an city, the paper analyzes the existing problems and countermeasures in vehicle inspection and maintenance procedure, and argues the necessity and urgency of implementing I/M program. Finally, based on successful experiences abroad and combining the fact of Xi'an city, the article establishes the scheme of I/M system and designs relating technical details about I/M program for Xi'an city in order to improve the atmosphere environment.