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问:缸垫烧损为什么能造成起动困难? 答:一台铁牛55A型拖拉机发动机,突然起动困难,经检查起动装置及油路各部件都很正常。只是缸垫的三、四缸处烧损。当三缸压缩时,四缸正是吸气行程,大量可燃混合气由三缸窜入四缸,并通过四缸吸气门一部分气体又返回空气滤清器。 而当四缸压缩时,三阳正处于膨胀行程爆发段,活塞下行,但由于气门关闭的延迟,也能造成向滤清器返气现象,一部分混合气窜入三缸。这样往复循环,导致压力不足,混合气
Q: Why does the cylinder head burn cause start-up difficulties? A: A tractor engine Tractor 55A, sudden start-up difficulties, after checking the starter and the oil components are normal. Just cylinder pad of three or four cylinder at the burning. When the three-cylinder compression, the four-cylinder is the inhalation stroke, a large number of combustible mixture from the three-cylinder into the four-cylinder, and through the four-cylinder suction valve part of the gas and returned to the air filter. When the four-cylinder compression, Sanyang is in the expansion stroke explosion, the piston down, but because of the delay valve closure, but also can cause the return air filter phenomenon, part of the mixture fleeing into the three-cylinder. This cycle of reciprocation, resulting in lack of pressure, the mixture