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    • 10. 发明公开
    • WORKS VEHICLE AND METHOD FOR CONTROLLING WORKS VEHICLE
    • 工作车辆和控制工作车辆的方法
    • EP2716939A1
    • 2014-04-09
    • EP12850732.4
    • 2012-09-04
    • Komatsu, Ltd.
    • SHIRAO, AtsushiOASA, TakahisaKITAO, Shinichi
    • F16H61/438F16H61/4061F16H61/431
    • F15B15/20F16H61/4061F16H61/431F16H61/438
    • A pump displacement control cylinder is configured to control the displacement of a hydraulic pump according to pressure of hydraulic fluid which is supplied to the pump displacement control cylinder. The pump displacement control cylinder is configured to switch the discharge direction of the hydraulic fluid from the hydraulic pump according to the supply direction of the hydraulic fluid to the pump displacement control cylinder. A forward and backward progression switching valve is configured to switch the supply direction of the hydraulic fluid to the pump displacement control cylinder. A pressure control valve is configured to control the pressure of the hydraulic fluid which is supplied to the pump displacement control cylinder according to a command value which is input to the pressure control valve. A forward and backward progression operation member is configured to be operated in order to switch forward and backward progression of the vehicle. A control section is configured to execute pump shuttle control which reduces the command value to the pressure control valve when switching between forward and backward progression using the forward and backward progression operation member.
    • 泵容量控制缸构造成根据供应到泵容量控制缸的液压流体的压力来控制液压泵的排量。 泵容量控制缸被构造成根据液压流体的供应方向将来自液压泵的液压流体的排出方向切换到泵容量控制缸。 前进和后退切换阀构造成将液压流体的供应方向切换到泵容量控制缸。 压力控制阀构造成根据输入到压力控制阀的指令值来控制供应到泵​​容量控制气缸的液压流体的压力。 前进和后退前进操作构件被配置为操作以切换车辆的向前和向后行进。 控制部分被配置为执行泵梭动控制,其在使用前进和后退前进操作部件在向前和向后前进之间切换时减小到压力控制阀的命令值。