柴油机自行熄火一台小四轮拖拉机,作业中柴油机突然自行熄火,随后摇车再起动极为困难。摇车时感到气缸压缩力很小。拆下气缸盖,发现燃烧室积碳严重,气门和气门座由于积碳过多已不能密封。从而引起燃烧室严重漏气,造成气缸无压缩力,再次起动困难。研磨气门和气门座后装复试车,发动机起动容易,运转正常。 Diesel self-extinguishing a small four-wheel tractor, diesel engine suddenly self-extinguishing operation, followed by rocking the restart very difficult. When the car was feeling the cylinder compression force is small. Remove the cylinder head and found that the combustion chamber coke serious valve and valve seat due to too much carbon can not be sealed. Causing a serious gas leak in the combustion chamber, resulting in no compression of the cylinder, starting again difficult. Grinding valve and valve seat after the trial rebuilt the car, the engine starts easily, the normal operation.