有一辆CA1091型汽车的起动机工作时好时坏,有时能起动发动机,有时则根本不转。为此驾驶员认真地进行了多次修理,先后几次更换起动机开关,几次清洁起动机内部,铆紧了松动的碳刷架,更换了磨损的铜套,等等。也奇怪,每次修理保养后都能工作一段时间,多则几天,少则几次。根据过去多次修理的情况,在排除了外部主电路(包括发动机与车架的过桥线)及控制电路可能引起该故障后,重点 There is a CA1091 car starter working good times and bad, sometimes starting the engine, and sometimes do not turn. To this end the driver conducted a number of serious repairs, has several times to replace the starter switch, clean the starter several times inside, riveting the loose brush holder, replace worn copper sleeve, and so on. Also strange, can work for a period of time after each repair and maintenance, as many days, as few as few. According to several repairs in the past, the exclusion of external main circuit (including the engine and the frame of the bridge) and the control circuit may cause the failure, the focus