影响汽车尾气排放因素及解决措施.doc

摘  要
车尾气排放就汽是通过汽车一系列冲程压缩做工后，所排出的无用“废气”气体。　汽车排发污染对人类生存环境和生活用水造成了极大的危害。汽车的排放污染主要来源于发动机排出的废气（约占65%以上）曲轴箱窜气（约占20%）和燃料供给系统中蒸发的燃油蒸气（约占10-20%），汽油机主要排放污染物是ＣＯ　ＨＣ　ＮＯＸ。
而　影响　汽车尾气的排放量的因素众多。三元催转化器大多与排气管制成，其内部由陶瓷体和一些贵重物金属催化剂组成。如果汽车在较差的路况上行驶时，极易造成底盘刮撞，导致三元催转化器陶瓷体的破碎。破碎的陶瓷体会随着废气进入消声器中，最终“影响”汽车的排放量。如果使用的汽油和机油质量不好，含有过多的的胶体都是极易造成三元催化器的堵塞而“影响”汽车的排放。影响汽车排放因素等一系列解决的措施等等。

关键词： 废气、三元催化转化器、影响。　　　　　　　　　　　　

Abstract
Motor vehicle exhaust emissions on the compression stroke stroke by car after work the emission of useless waste gas .auto row made pollution on the human environment and the domestic water caused great harm. Pollution comes mainly from vehicleemissionsengine emissions(about65%)crankcase blow-by gases(about20%)and fuel supply system in the fuel vapor evaporated(about10-20%),major emission gasoline engine pollution material is CO HC  NOX.
  The impact of vehicle exhaust emissions of many factors .three yuan catalytic converter and exhaust control as most of its internal by the ceramic body and some of the precious metal catalyst material composition.if the car when driving on poor road conditions can easily result in the chassis scratch hit.leading to three yuan catalytic converter ceramic body broken .experienec with broken ceramic exhaust into the muffler ,the ultimate impact automobile emissions if you use poor quality gasoline and oil,contain too much colloidal are vulnerable to blockage of catalytic converters ,impact automobile emissions .factors that affect vehicle emissions and a series of measures to address and so on.

Keywords：exhaust、catalyticconverter、impact.

目录
摘  要 2
1．排放控制系统 6
1.1燃油蒸发排放（EUAP）控制系统。 6
1.2活性炭罐的影响： 6
1.3废气再循环系统 6
1.4三元催化转化器与空燃比反馈控制系统 7
1.5二次空气喷射系统 8
1.6空气泵系统: 8
1.7脉冲空气系统: 8
2.电子节气门控制系统概述 9
2.1电子节气门控制系统的结构组成及工作原理 9
2.2电子节气门控制系统常见故障分析 9
2.3电子节气门控制系统控制的检修 10
3.影响汽车尾气排放不良诊断步骤方法案例分析 11
3.1汽车尾气排放不达标的诊断步骤 11
3.2案例分析 12
谢辞 13
参考文献 14
附录 15
一、 汽车排放系统的检查保养。 15
二、 检查方法。 15