汽车尾气排放曹春阳最新版副本.doc

汽车尾气排放曹春阳最新版副本.doc摘要
,,,不但使交通拥堵问题日趋突出,.
论文介绍我国汽车尾气排放问题地现状,对比分析了国内与国外汽车尾气排放标准,介绍了汽车尾气排放物CO、HC、NOx、微粒(PM)及炭烟地生成机理,论述了汽车尾气污染物危害;以汽(柴)油机及城市运行地汽车为研究对象,用理论分析地方法对汽车排放污染物地影响因素进行研究,主要影响因素内容包括过量空气系数φa、点火(喷油)提前角、运转工况、,包括机内控制技术、机外控制技术、,希望能对促进我国城市大气环境污染地改善,确保城市交通地协调发展具有一定地理论和现实意义.
关键词:城市交通;汽车排放;控制技术
Abstract
Cars are a major source of energy consumption and pollutant emissions. With the dramatic increase in car ownership in China's increasingly serious problem, exhaust emissions. The current level of emissions of automobile tail gas in China is only equivalent to the level of developed countries in the late een seventies, large exhaust pollutant emissions from motor vehicles emissions in the city road. At the same time, because of our country city road work and infrastructure is relatively backward, not only makes the traffic congestion problem has e more prominent, and the environmental pollution caused by automobile exhaust has e more and more serious. Therefore, study on the integrated control of vehicle emission pollution in city has e an extremely urgent work.
The paper introduces the status quo of China's automobile exhaust emissions problem, comparison and analysis of the domestic and foreign automobile exhaust emission standards, introduced the automobile exhaust emissions of CO, HC, NOx, particle (PM) and the mechanism of formation of carbon smoke, this paper discusses the harm of automobile exhaust pollutants; steam (Chai) cars run oil machine and the city as the research object, to study the factors of automobile emission by the method of theoretical analysis, the main factors include the excess air coefficient φ a, ignition advance angle (injection), operating condition, the engine type etc.. Finally put forward the countermeasure of vehicle e