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1.故障现象1台52t级港口专用大型液压挖掘机,在使用过程中发现开启其发动机自动怠速功能后,在工作装置无动作的情况下会突然提升转速,运转一段时间后,又重新回到自动怠速状态。在挖掘机工作装置没有动作的情况下,这种现象反复发生,且故障时间间隔不确定。2.自动怠速工作原理该挖掘机设置自动怠速功能的目的是在挖掘机工作装置无动作时降低发动机转速,以减小
1. Fault phenomenon A Taiwan 52t-class port dedicated large hydraulic excavator found in the process of using its engine idle speed function, the working device in the case of no action will suddenly increase speed, after a period of operation, and back to Automatic idle state. This phenomenon occurs repeatedly when there is no action on the working equipment of the excavator, and the time interval of the fault is indefinite. 2. Automatic idle working principle The purpose of the excavator to set the automatic idle function is to reduce the engine speed when the excavator working device is inoperative to reduce