汽车熄火
摘 要:本文针对马自达5轿车怠速熄火的故障,论述了该故障的有关影响因素,通过故障诊断,到故障是由废气再循环系统(EGR)工作不正常造成的,并经检测修复,彻底排除故障。
关键词:马自达5 发动机 怠速熄火 EGR
Trouble Diagnosis and Elimination of Mazda 5 Engine Idling Stop
Zhou Yongpeng
Abstract:This article focuses on the failure of Mazda 5 car's idling stop and discusses the related factors of the failure. Through fault diagnosis, it is found that the failure is caused by the abnormal operation of the exhaust gas re-circulation system (EGR), and the fault is completely eliminated after inspection and repair.
Key words:Mazda 5, engine, idling stop, EGR
废气再循环系统(EGR)是属于发动机的一种机内净化技术,它将发动机排出小部分废气重新引入发动机进气系统,与可燃气混合后,进入气缸内燃烧,从而降低气缸内最高温度,减少NOx的生成,进而达到保护环境的目的。
1 故障现象
一辆2011年款马自达5轿车,2.0L,行驶里程12万公里,在怠速运转时,发动机经常熄火,但汽車在低、中、高速行驶时无异常,松开油门后,发动机抖动剧烈或马上熄火。
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