汽车教学仪器设备中发动机行驶途中自动熄火

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　　故障诊断

　　取车后，首先用汽车教学仪器读取故障代码，故障代码如图所一示(但没有故障代码45)。根据故障代码，检查进气管路，无泄漏或堵塞现象。检查NGP传感器和相关线束，未发现异常。考虑到点火能量不足也会引起故障代码75的出现，检查点火系统，检查点火线圈和线束，一切正常，然后取下火花塞进行检查，找到第三个气缸与第五气缸的火花塞头氧化严重，如图二所示，导致点火不良。

　　故障排除

　　QUDAIDISANGANGHUOHUASAIHEDIWUGANGCESHIHOU,YOUSHIHUIGUANGYINQINGGUZHANG,ERYINQINGJIANGZIDONGGUANBI,KAOLVSHIFOUYOUGAOYAQIEDUANDIANCIFAKAZHU,DAOZHIJINQIZUSAI,YINGXIANGJINQIYALI,DAOZHIFADONGJIZIDONGGUANBI。ZAIJIANCHAGAOYAQIEGEDIANCIFASHI，FAXIANGAOYAQIEGEDIANCIFAXIANSHUMODUANSHOUSUO，RUTUSANSUOSHI，JIECHUBULIANG。JIANGDIANCIFAXIANSHUDUANZIZHONGXINPAILIE，GAOYAQIEDUANHOU，JIANGXIANSHUJIETOUJIAJINBINGCESHI。YISHANGGUZHANGWEIPAICHU。

　　错误总结

　　GENJUGUZHANGDAIMAFENXI，GUZHANGDAIMA44HE75SHIYOUGUZHANGDAIMA43YINQIDE，YINCIYOUBIYAOGUANZHUDAOZHITIANRANQIYALIDIYUYUQIDEGUZHANGMOSHI。ZAIJIEJUELEGUZHANGMA43ZHIHOU，YOUJIEJUELEGUZHANGMA44HEGUZHANGMA75。QUEDIAN,TIANRANQIYALIDIYUYUQI,YOUBIYAOKAOLVSHIFOUYOUXIELOUHUOTIANRANQIJINQIGUANDAODUSAI,YIJIJIANCHAGAOYAQIEDUANDIANCIFASHIFOUGONGZUOZHENGCHANG,SHIFOUNGPCHUANGANQICELIANGDECANSHUSHIZHENGQUEDE,ERQIEXIANSHULIANJIESHIFOUKEKAO。JIEJUELEQILUWENTIHOU，KEYIKAOLVDIANHUONENGLIANGSHIFOUBUZU，BINGDUIXIANGYINGDEDIANHUOXITONGJINXINGJIANCHA。

　　YISHANGJIUSHIJIANGJIEDEQICHEJIAOXUEYIQISHEBEI：http://sol-arq.com/qa-al/459.html，QICIXIAOBIANHAIZONGJIELEGAISHEBEIZHONGFADONGJIXINGSHITUZHONGZIDONGXIHUODEGUZHANGZHENDUAN、GUZHANGPAICHUDENGNEIRONG，XIAOBIANKENENGJIANGJIEDENEIRONGBIJIAOJIANDAN，XIANGYAOXIANGXINEIRONGDEPENGYOUKEGUANGZHOUSHIYIXUAN5WEIXINGUANGZHOUSHIYIXUAN5，YEGUANGZHOUSHIYIXUAN5XUYAODINGGOUDEPENGYOULAIDINGZHI，GUANGZHOUSHIYIXUAN5GEWEIJINGXIAOSHANGYUYUANXIAOLAISHIDIKAOCHA!