汽车尾气.doc

文档介绍：浙江科技学院
本科毕业论文
(2010届)
题目汽车发动机尾气检测与故障诊断的研究
学院机械与汽车工程学院
专业车辆工程
班级车辆(专升本)081班
学号 308015025
学生姓名余洪志
指导教师梁晓娟
完成日期 2010年6月4日
汽车发动机尾气检测与故障诊断的研究
学生姓名:余洪志指导老师:梁晓娟
浙江科技学院机械与汽车工程学院
摘要
众所周知,民用汽车的增长,尤其是私家车的高速膨胀,给人们的日常生活带来了极大的便利,同时也带来了严峻的环境问题,其产生的尾气已经构成公害。科学分析发现,汽车尾气中有水蒸气、02、H2、N2、C02、CO、HC化合物、NOx、S02、微粒物质等,其中把对人体有害和影响自然环境增长的成分称为污染物,有C02、CO、HC化合物、NO x、S02、微粒物质等。据统计,一辆轿车一年排出尾气比自身重量大3倍。
汽车尾气成分与发动机的故障存在着一些必然的联系,通过废气分析仪检测出汽车的尾气成分及含量,和标准值进行比较,从而分析和推断出汽车性能的好坏、确定发动机的故障部位,进而排除故障、恢复其良好的性能、提高汽车的动力性、经济性和减少排放。通过对实车(桑塔娜2000GSI)做模拟故障实验,验证理论,以更好的利用尾气分析来诊断故障。
关键词:汽车尾气排放检测燃烧分析故障诊断
The research of vehicle emission diagnosis and fault diagnosis
Student:Yu Hongzhi Advisor: Niang Xiaojuan
School of Mechanical and Automotive Engineering
Zhejiang University of Science and Technology
Abstract
As we all know that the civilian vehicle growth,Particularly in the fast-growing private cars has brought great convenience to people ' s daily life,but also leads to a serious environmental problems arising from its exhaust and it es a hazard now. Scientific analysis discovers that vapour O2,H2,N2,CO2,CO,hydrocarbons,NOx,SO2,Particulate matter etc are all included in the automobile exhaust. Those ingredients harmful to human beings and impacting on the natural growth are called pollutants,such as CO2,CO,hydrocarbons, NOx, SO2, particulate matter. According to statistics,one car exhaust emission in a year is larger 3 times than the weight of its own.
There were some necessary links between Automobile ponents and engine failure. Through the position and its content tested by vehicle exhaust gas analyzer, and make the standard value parison, so as to analyze and infer the vehicle performance is good or bad, determine the location of engine failure, further troubleshooting to restore their good performance, increase vehicle power, economy and reduce emissions. Through the real vehicle (Santana 2000GSI) failure to do simulation experiments can verify the theory, in order to