要保证汽油发动机正常运行,须满足4个基本要素(图1):足够的压缩;足够的点火能量;良好的燃油供给和喷射;正确的时间。“正确的时间”即指发动机正时。在维修过程中,大多维修人员认为,只要对准凸轮轴链轮和曲轴链轮之间的那些正时记号,发动机正时就不 To ensure the normal operation of gasoline engines, to meet the four basic elements (Figure 1): adequate compression; sufficient ignition energy; good fuel supply and injection; the right time. “Correct time ” means engine timing. During maintenance, most service personnel believe that as long as those timing markings are aligned between the camshaft sprocket and the crankshaft sprocket, the engine timing is not