论文部分内容阅读
故障现象一辆2009年6月生产的金杯海狮车,装配4G20D4 2.0L电控汽油发动机和五速手动变速器,行驶里程约为7万km。该车因发动机加速不畅,排气管冒黑烟而进厂检修。据驾驶人反映,该车此前曾在快修店维修过,曾更换了火花塞、点火线圈、进气歧管绝对压力和温度传感器,清洗过喷油器,发动机电控系统相关线束也检查了,但故障依旧,车辆行驶时发动机故障灯有时还会点亮。故障诊断分析可知,造成发动机加速不畅,排气管冒黑烟的原因可能是空气流量传感器及其线路故障,氧传感器
Fault phenomenon A June 2009 production of gold sea lion car, equipped with 4G20D4 2.0L electric gasoline engine and five-speed manual transmission, mileage of about 70,000 km. The car due to poor acceleration of the engine, black smoke exhaust pipe into the factory overhaul. According to the driver, the car had been repaired in the fast repair shop, had replaced the spark plug, ignition coil, intake manifold absolute pressure and temperature sensors, cleaning the fuel injector, the engine control system wiring harness also checked, But the fault remains the same, the engine fault light sometimes lit when the vehicle is running. Fault diagnosis analysis shows that caused by poor acceleration of the engine exhaust black smoke may be due to air flow sensor and its line failure, oxygen sensor