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1.故障现象将1台23t级液压挖掘机发动机油门旋钮旋到高挡位并加快工作装置动作速度时,发动机会突然出现自动熄火故障。但是将发动机油门旋钮旋到低挡位且工作装置动作缓慢时,发动机不会自动熄火。2.启动电路组成与原理(1)组成该挖掘机启动电路主要由启动开关1、电磁式电源总开关2、蓄电池3、启动机4、发电机5、保护继电器6、启动控制继电器7、启动继电器8、
1. Symptom When a 23t hydraulic excavator engine throttle knob is rotated to a high gear and the speed of the working device is increased, the engine suddenly starts to malfunction automatically. However, when the engine throttle knob is rotated to the low gear and the working device is moving slowly, the engine does not automatically turn off. 2. Startup Circuit Composition and Principle (1) Composition The excavator start-up circuit mainly consists of start switch 1, electromagnetic power switch 2, battery 3, starter 4, generator 5, protection relay 6, start control relay 7, start Relay 8,