汽车服务工程毕业论文

北京化工大学北方学院毕业设计论文

1 NORTH COLLEGE OF BEIJING UNIVERSITY OF
CHEMICAL TECHNOLOGY



毕业论文
论文题目电喷发动机故障诊断技术研究

学院理工学院
专业汽车服务工程
学号
姓名
指导教师


2011年5月 北京化工大学北方学院毕业设计论文

I
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北京化工大学北方学院毕业设计论文

II 电喷发动机故障诊断技术研究 汽车服务工程专业
指导教师 摘 要
发动机是汽车的重要组成是车辆运行的动力来源。随着其自动化程度的不
断提高工作性能的不断完善其结构也变得越来越复杂外加工作环境十分恶
劣因此发动机故障发生频率很大并且其诊断难度也在不断提高。这样就使发
动机成为汽车故障诊断与检测的重点对象。为了迅速诊断故障情况提高维修的
效率世界各国的汽车公司和研究机构纷纷投入大量资金和精力研究汽车发动机
电控系统的故障诊断。而我国汽车工业发展较晚汽车电子与发达国家差距很大
所以进行汽车故障诊断技术究对于改善和提高我国汽车检测诊断技术非常重要
具有重要的现实意义。
汽车发动机自研制成功以来。经过一个多世纪的改进和完善从化油器式发
动机发展到电子控制燃油喷射系统发动机发动机系统已成为集电子技术、计算
机技术、信息技术于一体的智能控制系统。由于发动机结构复杂工作条件恶劣
使得发动机故障率较高。维修保养费用很大如何对发动机的故障进行及时、高
效的诊断和维修日益成为一
个突出的问题。
本文主要是对汽车发动机故障诊断技术进行研究分类并且对各种方法进行
总结分析。首先确定排除故障的思路然后再参照文章中的各种诊断方法进行故
障诊断最后总结出几种方法的实用范围这样就可以使得故障诊断变得简单明
了。 关键词汽车 电喷发动机 故障诊

断 诊断方法

北京化工大学北方学院毕业设计论文

III Abstract
The engine is the important composition, car is powered vehicle operation. With
its automation degree unceasing enhancement, the working performance of the
constantly improve, its structure is also becoming more and more complex. Plus
working environment is very abominable, therefore engine failure occurred frequency
is very big, and its diagnostic difficulty also constantly improving. This makes the
engine become auto fault diagnosis and the detection of major object. In order to
quickly diagnosis fault, improve the efficiency of maintenance, world automobile
companies and research institutes have invested a great deal and energy research
automotive engine control system fault diagnosis. While China's auto industry
development later, automobile electronics and developed countries, because of the
large gap for auto fault diagnosis technology to improve and enhance lao-zhuang
China's automobile detection and diagnosis technology is very important, have
important practical significance.
Since the successful development of automobile engine. After more than a century
of improving and perfecting from carburetor type engine development to the
electronic control fuel injection system engine, engine system has become the
collection of electronic technology, computer technology and information technology
in the integration of intelligent control system. Because the engine complicated
structure, working conditions and makes the engine failure rate is higher.
Maintenance is costly, how to automotive engine fault timely, efficient diagnosis and
maintenance is increasingly becoming a prominent problem.
This paper is mainly to the automobile engine fault diagnosis technique to study
various methods, and classification of the analysis. First make sure that remove the
faults ideas, then refer to article in fault diagnosis of diagnosis method, and finally
summarizes the practical limits several methods, so that they can make fault diagnosis
become simple and clear. Key words: Car Efi engine Fault diagnosis Diagnostic method 北京化工大学北方学院毕业设计论文

IV
目 录
前 言 ................................................... 1
第1章 发动机故障诊断概况 ................................ 2
第1.1节 现代电喷发动机概况 ........................... 2
第1.2节 电喷发动机故障诊断意义 ....................... 3
第1.3节 发动机故障诊断技术 ........................... 4
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