论文部分内容阅读
故障现象 一辆荣威350轿车,因发动机无法起动而进厂检修。据驾驶人反映,车辆停放一夜后,就出现发动机无法起动的故障现象。故障诊断 接车后,试车验证故障,故障确实存在。接通点火开关至ON位置,燃油泵不工作;将点火开关转至起动位置,起动机电磁离合器断续工作,工作时间间隔约2 s,类似起动时蓄电池亏电的症状,但仪表显示正常,且喇叭声音响亮,同时伴随车门解锁及危险警示灯闪烁等异常现象。根据上述故障现象分析,初步排除了蓄电池电压过低,起动机及其控制部分故障的可能性。因为如果是蓄电池电
Failure phenomenon A Roewe 350 sedan, because the engine can not start into the factory overhaul. According to the driver reflected, the vehicle parked overnight, the engine failed to start the phenomenon. Troubleshooting After receiving the car, test to verify the fault, the fault does exist. The ignition switch to the ON position, the fuel pump does not work; the ignition switch to the starting position, the starter electromagnetic clutch intermittent work about 2 s, similar to starting the battery power loss symptoms, but the instrument showed normal, And loud speaker sound, at the same time with the door to unlock and hazard warning lights flashing and other anomalies. According to the analysis of the above symptoms, initially ruled out the battery voltage is too low, the starter and control part of the possibility of failure. Because if it is battery power