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1.油门电动机工作原理JCM922型挖掘机柴油机电动油门机构由油门电动机和限位开关等组成,如图1所示。限位开关N1和N2通过连线连接在一起,油门电动机通过接收控制器发出的控制信号,控制喷油泵调速杆行程,以此控制柴油机转速。当油门电动机停止在中间位置时,电流不经过油门电动机,油门电动机无动作;当限位开关N1连接电源正极、接线端子M连接电源负极(接地)时,电流从限位开关N1经过滑片流入油门电动机,并从接线端子M流出,此时油门电动机逆时针旋转,柴油机油门加大、转速提高;当限位开关N2连接电源负极(接地)、
1. Throttle motor works JCM922 excavator diesel engine electric throttle body by the throttle motor and limit switches and other components, as shown in Figure 1. Limit switches N1 and N2 are connected by a wire. The throttle motor controls the diesel engine speed by receiving the control signal from the controller and controlling the stroke of the fuel injection speed control rod. When the throttle motor stops at the middle position, the current does not flow through the throttle motor and the throttle motor does not operate. When the limit switch N1 is connected to the positive pole of the power supply and the terminal M is connected to the negative pole of the power supply (ground), current flows from the limit switch N1 through the sliding plate Throttle motor, and from the terminal M outflow, then the throttle motor counterclockwise rotation, diesel engine throttle increased speed increased; when the limit switch N2 connected to the negative power supply (ground)