目前,大多数发动机采用60-2齿(60个信号齿的位置只有58个齿,还有1个大齿缺)的曲轴信号盘(图1)。一般定义在曲轴信号盘大缺齿后的第1个齿为信号起始点。发动机的运转靠活塞的上下运动转化为曲轴的旋转运动。发动机1个循环有4个行程,曲轴旋转2圈,经过120个齿,每个行程要经历30个齿。其中做功行程是发动机的动力来源,发动机在每次做功行程时对曲轴进行加速,使发动机持续运转,就像陀螺,抽1次加速1次,但在车上,人却感觉不到这种突兀的加速,这是由于飞轮的存在。飞轮一 Currently, most engines use a crankshaft dial (Figure 1) with 60-2 teeth (58 teeth on 60 signal teeth and 1 large tooth missing). The general definition of the signal in the crankshaft big teeth after the first tooth for the signal starting point. Engine operation by the piston up and down movement into crankshaft rotation. The engine has 4 cycles for 1 cycle, 2 cycles for the crankshaft, 120 gears for each stroke and 30 gears for each stroke. One of the work trip is the engine power source, the engine crankshaft in each work trip to accelerate, so that the engine continues to operate, like a gyro, pumping 1 times to accelerate 1, but in the car, but people do not feel unexpected This is due to the presence of the flywheel. Flywheel one