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故障现象一辆2010款2.0 L途安轿车,搭载CGZ发动机,行驶里程约为50万km,因动力不足进厂检修。故障诊断经试车,发现怠速正常,但一接通A/C开关,发动机严重抖动,并且一起步就熄火;慢慢加速,发动机转速能勉强上升;急加速,发动机立即熄火。连接故障检测仪,查看发动机数据流,怠速时发动机负荷为23%(正常值为19.5%),异常;检查01-08-33组数据,发现1区氧传感器调节值为+23%,2区氧传感器电压为0.12 V,这2个数据均反映混合气偏稀;加速试车,数据仍反映混合气偏稀。由上述诊
Trouble A 2010 2.0L Touran sedan, equipped with CGZ engine, driving range of about 500000 km, due to insufficient power into the plant overhaul. Fault diagnosis After the test run, found idle normal, but a switch on the A / C switch, the engine was a serious jitter, and a step to turn off; slowly accelerating, the engine speed can barely rise; rapid acceleration, the engine immediately turn off. Connect the fault detector, check the engine data flow, the engine load at idle is 23% (normal value is 19.5%), abnormal; check 01-08-33 group data and found that the oxygen sensor in Zone 1 is adjusted to + 23%, Zone 2 Oxygen sensor voltage is 0.12 V, these two data reflect the lean mixture; accelerated test, the data still reflect the lean mixture. By the above consultation