喷油泵供油时间的早晚直接影响着发动机的工作。过早喷油使混合气提前形成,并在活塞到达上止点前爆发燃烧,给正在上行的活塞造成一个短时间的阻力,并产生“敲缸”现象。过迟喷油在活塞下行时才形成混合气和燃烧,结果燃烧空间 Fuel pump fuel supply time sooner or later directly affect the work of the engine. Premature fuel injection to the formation of the gas ahead of schedule, and the piston reaches the top dead center before the combustion broke, to the piston is causing a short-term resistance, and have a “knock cylinder” phenomenon. Late fuel injection in the piston down when the formation of a mixture and combustion, resulting in combustion space