SPEED CHANGER OF HYDRAULIC DRIVING DEVICE AND CONTROL METHOD THEREOF
    2.
    发明公开
    SPEED CHANGER OF HYDRAULIC DRIVING DEVICE AND CONTROL METHOD THEREOF 失效
    DREHZAHLÄNDEREREINER HYDRAULISCHEN ANTRIEBSVORRICHTUNG UND STEUERUNGSVERFAHRENDAFÜR

    公开(公告)号:EP0781947A2

    公开(公告)日:1997-07-02

    申请号:EP95930704.2

    申请日:1995-09-06

    申请人: KOMATSU LTD.

    IPC分类号: F16H61/42

    摘要: The present invention relates to a speed changing device for a hydraulic driving apparatus and a speed change control method thereof which provide excellent controllability, running efficiency and reliability without occurrence of cavitation. To this end, the device comprises a shifter selected position sensor (63a) for detecting a shift lever change, a motor rotation speed sensor (52) for detecting a rotation speed of a hydraulic motor (50), and a control device (60), and the control device (60) judges and controls either a powering control or a brake control based on the change of the shift lever selection and on the comparison of the detected motor rotation speed with a memorized motor rotation speed. In addition, a two-stage back pressure valve (23) may be provided between a directional control valve (21) and an oil tank.

    摘要翻译: 速度变化appts。 包括用于向可变容量液压马达(50)供电的液压泵。 泵和电机通过闭合中心的切换阀连接。 传感器(63a)检测变速杆的选定位置。 另一传感器(52)确定液压马达的转速。 控制装置(6)基于变速杆的位置变化以及电动机速度与存储在存储器中的速度之间的比较来确定车辆是制动还是被供电。