电喷发动机动力不足因分析及排除方法.doc

电喷发动机动力不足原因分析及排除方法 摘要 所谓发动机动力不足，就是发动机输出的扭矩不足以克服外界因素对发动机的阻力。反映在车上就是加速性和爬坡能力差，怠速时开空调或低速转向使易造成发动机熄火，加大油门时车子反应迟缓，行驶中很难在规定时间内达到较高车速，或者完全达不到最高车速。引起发动机动力不足的具体原因很多，主要有燃油压力不足、喷油器堵塞、进气管漏气或堵塞、排气管堵塞、空气流量计或者进气压力传感器故障、节气门位置传感器故障、点火系统故障、电控系统故障、气缸压力不足以及其它人为因素造成的风阻过大等。本文通过以下几个故障实例，来分析发动机动力不足的原因分析以及故障的排除。 关键词：发动机动力不足；故障分析；故障排除 Abstract The so-called power of the engine, the engine output torque is not sufficient to overcome the resistance of external factors on the engine. Reflected in the vehicle acceleration and climbing ability is poor, idle, or when the air conditioning turned so easily lead to low-speed engine stalling, throttle when the car is slow to respond, moving within the prescribed time is difficult to achieve higher speed, or totally less than maximum speed. The specific power of the engine caused by many reasons, mainly lack of fuel pressure, injector clogging, leakage or blockage of the intake pipe, exhaust pipe blocked, air flow meter or the intake pressure sensor failure, throttle position sensor fault, ignition system failure , electric control system failure, lack of cylinder pressure, and other human factors such as excessive wind resistance. In this paper, several failure example, to analyze the reasons for lack of engine power analysis and trouble shooting. 朗读 显示对应的拉丁字符的拼音 ? 字典 - 查看字典详细内容 Keyword：The engine power is insufficient ； Fault analysis ； Trouble shooting 目 录 1发动机的基本概念与工作循环……………………………………………………1 1.1发动机基本概念…………………………………………………………………1 1.2四冲程发动机的工作循环………………………………………………………2 1.3电喷发动机的工作原理………………………………………………………3 2影响电喷发动机气缸压力不足的因素……………………………………………3 3电喷发动机气缸压力不足的故障原因检测分析及排除…………………………4 3.1气缸磨损严重…………………………………………………………………4 3.1.1气缸磨损严重具体案例……………………………………………………4 3.1.2故障原因分析及排除…………………………………………………………4 3.2电瓶负极线故障……………………………………………………………8 3.2.1电瓶负极线故障具体案例………………………………………………8 3.2.2故障原因分析及排除………………………………………………………8 3.3气门与气门座接触不良而漏气…………………………………………………9 3.3.1气门与气门座接触不良而漏气具体案例……………………………………9 3.3.2故障原因分析及排除…………………………………………………………9 3.4活塞环装配不当…………………………………………………………………11 3.4.1活塞环装配不当