汽车发动机故障检测课题论文.docVIP

摘 要 汽油发动机，是以汽油作为燃料的发动机。其特点是转速高，结构简单，质量轻，造价低廉， 运转平稳，使用维修方便。因此，从1886年第一辆汽车开始，汽油机就在汽车上，特别是小型汽车上大量使用，至今不衰。近年来，汽油发动机技术不断升级，对汽车维修人员提出了更高的要求，因此，汽油发动机故障诊断系统的研究变得尤为重要。 本文针对国内几款主流车型的常见故障进行了阐述与分析，结合汽车故障诊断理论和技术、传统诊断系统的原理和优点，提出了汽油发动机故障诊断系统的研究方案、建立了故障树、设计了基于故障树的汽油发动机故障诊断系统。 汽油发动机故障诊断系统以Windows XP为操作平台，Visual Basic、Access为编程工具进行开发，具有简明、易操作的人机界面，实现了故障诊断，数据库管理等模块功能，具有较强的实用性。 关键词：汽油发动机；故障；诊断系统 Abstract Gasoline engine, gasoline is used as fuel engine. It features high speed, simple structure, light weight, low cost, stable operation, convenient repair. Therefore, the first in 1886 to start a car, gasoline engine in the car, especially a large number of small car use, has not changed. In recent years, escalating gasoline engine technology, vehicle maintenance staff to a higher demand, the gasoline engine fault diagnosis system has become particularly important. In this paper, several mainstream domestic common fault models are described and analysis, combining theory and fault diagnosis of automobile technology, the principles of the traditional diagnostic system and the advantages of a gasoline engine fault diagnosis system for research programs, the establishment of a fault tree, the design of fault-tree based on the gasoline engine fault diagnosis system. In this paper, several mainstream domestic common fault models are described and analysis, combining theory and fault diagnosis of automobile technology, the principles of the traditional diagnostic system and the advantages of a gasoline engine fault diagnosis system for research programs, the establishment of a fault tree, the design of fault-tree based on the gasoline engine fault diagnosis system. Key word：Gasoline engineFault；Diagnosis System 目 录 1 绪 论 1 1.1 发展汽车检测诊断技术的意义 1 1.2 汽车诊断与诊断学 2 1.3 汽车故障诊断系统概况 2 1.3.1 国外汽车诊断系统的发展概况 2 1.3.2 国内汽车检测诊断系统的现状与发展 3 1.3.3 故障诊断面临的困难 3 1.3.4 故障诊断的未来展望 4 1.4 本文主要研究内容 4 2 汽油发动机的工作原理及常见故障分类 6 2.1 汽油发动机的工作原理 6 2.1.1 汽油发动机的组成 6 2.1.2 汽油发动机的工作原理 7 2.2 汽油发动机的总体结构 9 2.3 汽油发动机常见故障的分类 11