1、 毕业设计说明书(论文) 索纳塔发动机的电控系统的检修 系 部: 汽车工程系 专 业: 汽车制造与装配技术 班 级: 学生姓名: 学 号: 指导教师: 2012 年 11 月 22 日 I 摘 要 摘要:由于汽油能源正在日趋衰竭,环境保护日益迫切,人们对现代汽车发 动机提出了更严格的要求,要具有满足法规要求的低排放,良好的经济性和足够 的动力性,实现这个目标的核心技术就是发动机的电控系统,通过对发动机电控 系统的组成和原理的分析总结来更好的处理一些常见故障,终掌握一些日常维护 方最法。并且随着现在的先进技术,电控发动机在结构和功能上均有了较大的改 进。主要有:(1)结构的层次性、复杂性从系统论
2、的观点,电控发动机是由有限个 “元素”通过各种“联系”构成的多层次系统。(2)功能控制的集中性。电控发 动机系统主要由电控燃油喷射系统、电控点火装置、怠速控制、排放控制、进气 控制、增压控制、警告提示、自我诊断与报警系统等子系统组成,电控燃油喷射 系统又包括了燃油系统、进气系统和电控系统三个组成部分。其中电控系统作为 整个发动机系统的控制核心,用来协调各平行和上级系统的工作。发动机电控系 统其结构的层次性、复杂性,其控制功能的集中性,导致其故障表现形式的多样 性、复杂性。,在分析电控系统的故障时,一定要了解电器、电子设备的结构、 功能和特点,各电控系统的组成、功用和工作原理,以及各种常见故障的
3、现象、 原因和排除方法等。 关键词:发动机电控系统的构造和基本功能,电控单元,传感器,故障,检修。 ABSTRACT English summary: Failure due to gas energy is increasing, environmental protection increasingly urgent, it is the modern automobile engine made more stringent requirements, to meet the regulatory requirements with low emissions, good economy
4、 and sufficient power, the core technology to achieve this goal is the engines electronic control system, through the electronic engine control system components and II principles of analysis summary to better deal with some common faults.And now with the advanced technology, electronic controlled e
5、ngine in structure and function has greatly improved.Mainly include: (1) structure of the levels of complexity, from the viewpoint of system theory, electronic control engine is limited by a “elements“ through various “links“ constitute multilevel system.(2) the functional control of concentration.E
6、ngine electronic control system consists of electronic control fuel injection system, electronic ignition device, idle speed control, emission control, air control, pressure control, warning, self diagnosis and alarm system of subsystems, electronically controlled fuel injection system includes a fuel system, air inlet system and electric control system of three components.The electric control system of the engine as the core control system, t