中 文 摘 要怠速的任务只是用于使发动机不熄火，而不是对外做功，怠速转速越低越好，但转速太低，则会导致怠速不稳定，容易熄火。本文对怠速不稳的原因进行分析，主要针对丰田汽车怠速不稳的原因：丰田轿车的怠速控制系统故障；ECU 故障；进气系统故障；花塞、高压线、喷油器等故障进行分析。对丰田汽车怠速进行诊断与排除。关键词 怠速 丰田 故障 分析 诊断和排除AbstractThe idle task is just used to make the engine does not stall, rather than external work, idle speed as low as possible, but the speed is too low will lead to unstable idle speed, easy flameout. This paper analyzes the causes of unstable idle speed, mainly for Toyota car: Toyota car idling control system malfunction; fault ECU; intake system fault; spark plugs, high tension lines, fuel injector, and so on. Diagnosis and remedies of TOYOTA.Key words idle speed TOYOTA malfunction analysis Diagnosis and elimination目 录1.绪论........................................................................................................................................12.丰田汽车怠速不稳的原因分析..............................................22.1 原因分析............................................................................................................................................22.2 本章小结............................................................................................................................................23.怠速控制系统的故障诊断与排除............................................33.1 怠速转速控制的实质.....................................................................................................................33.2 怠速控制系统组成..........................................................................................................................33.3 怠速控制过程...................................................................................................................................33...
