The invention discloses an engineering machinery hydraulic steering system and a control method. The system comprises a hydraulic oil tank, a steering pump, an emergency steering pump, a controller, a steering operation device, a steering valve, a hydraulic lock, a displacement sensor, a pressure sensor, an emergency steering valve and a steering oil cylinder. Signals from the steering operation device, the displacement sensor and the pressure sensor are received through the controller, different signals are logically processed, and then different instructions are output to the steering pump, the emergency steering pump, the steering valve and the emergency steering valve. The steering pump, the emergency steering pump, the steering valve and the emergency steering valve are controlled to act correspondingly so as to meet the requirement for the steering function of the whole machine. And after receiving a pressure abnormity feedback signal of the pressure sensor or a displacement abnormity feedback signal of the displacement sensor, the controller immediately sends an instruction to the emergency steering pump and the emergency steering valve, so that the emergency steering pump and the emergency steering valve immediately intervene, and a normal steering function is ensured.

    本发明公开了一种工程机械液压转向系统及控制方法,所述系统包括液压油箱,转向泵,应急转向泵,控制器,转向操作装置,转向阀,液压锁,位移传感器,压力传感器,应急转向阀,转向油缸;本发明通过控制器接收来自转向操作装置、位移传感器及压力传感器的信号,对不同信号逻辑处理,然后输出不同指令给到转向泵、应急转向泵、转向阀、应急转向阀,分别控制转向泵、应急转向泵、转向阀、应急转向阀相应动作以满足整机转向功能需求,当发动机或者转向泵或者转向阀故障,控制器收到压力传感器的压力异常反馈信号或位移传感器的位移异常反馈信号后立即发出指令给到应急转向泵和应急转向阀,使得应急转向泵和应急转向阀立即介入,保证正常转向功能。


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    Title :

    Engineering machinery hydraulic steering system and control method


    Additional title:

    一种工程机械液压转向系统及控制方法


    Contributors:
    LI JIANYANG (author) / FAN XIAOTONG (author) / LIU BENBEN (author) / ZHANG GAOFEI (author) / ZHOU ZHONGLIANG (author)

    Publication date :

    2023-09-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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