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1.故障现象2010年7月份,1台正在湖北省赤壁市施工的徐工XM200型路面铣刨机柴油机出现无法提速故障,只能维持低速运转。2.柴油机控制原理该路面铣刨机柴油机油门控制系统由电控单元(ECU)、控制器、手油门开关(S85)、CAN总线及GPS(卫星定位系统)组成,如图1所示。该柴油机转速由手油门开关控制,分为中、低、高速3个挡位,分别与控制器输入端子(262)连接。手油门
1. Symptom In July 2010, a XCMG XM200 pavement milling machine under construction in Chibi, Hubei Province failed to raise speed and failed to maintain its low speed operation. 2. Diesel engine control principle The road milling machine diesel engine throttle control system consists of ECU, controller, hand throttle switch (S85), CAN bus and GPS (satellite positioning system), as shown in Figure 1. The diesel engine speed by the hand throttle switch control, divided into medium, low, high-speed 3 gear, respectively, with the controller input terminal (262) connection. Hand throttle