车用柴油机故障排除(2例)

TWO Cases Study of Failure Recovery of Diesel Engine

柴油机周期性“游车” 1．故障现象及危害 商用车广泛使用柴油机。柴油机出现“游车”故障，实际是运行时转速不稳的一种表现。其现象是柴油机在怠速或中速运转时（加速踏板停留在一定位置不动），呈现出周期性、有规律的忽快忽慢的变化，而且加减油门时变化不及时，发动机无力，其声音有节奏地忽高忽低，转速大幅度地波动，声音清晰可辨。柴油机出现此故障亦称为其周期性“游车”。

The article analyzed the failures of so-called, two common faults periodically happened to the diesel engine, and explained various reasons causing the problem. In addition, the article also put forward several measures for emergency and prevention.