康明斯柴油机PT燃油系统是依靠电路系统中启动开关的关闭来熄火停机的。当启动开关旋至关闭位置后,柴油机应在7～10s内熄火停机,若熄火时间超过10s,则视为熄火困难。引起熄火困难的原因较多,但其实质则是燃油系统中喷油器计量孔前的油压偏高,超过了熄火油压所致。根据笔者20多年的实践经验知,导致喷油器计量孔前的油压偏高的原因有以下几点。 Cummins diesel PT fuel system is to rely on the shutdown of the start-up switch in the circuit system to shut down. When the start switch to the closed position, the diesel engine should be shut down in 7 ~ 10s shut down, if the shut-off time exceeds 10s, it is considered as flameout difficulties. The cause of flameout difficulties are many, but its essence is that the oil pressure in the fuel injection system before metering hole is too high, which is more than the oil pressure of the flameout. According to the author of more than 20 years of practical experience, leading to the fuel injector metering hole high in the following reasons.