发动机窜油故障因机油窜入燃烧室，导致机油与可燃混合气不正常燃烧。

Oil leaking in combustion chamber of an engine leads to abnormal combustion of oil and mixture.

youdao

试验结果显示，正常燃烧与部分燃烧的离子电流信号在数值上差异较大。

The results show that the value of the ion current is different between the normal combustion and partial burning.

youdao

因混合气过浓、点火系统有故障、发动机内压力损失、冷机等导致的不正常燃烧都会形成气门积炭。

Improper combustion, due to a rich mixture, defective ignition system, loss of compression in the engine, a cold engine, and so forth, will result in carbon deposits on the exhaust valves.

youdao