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    • 107. 发明授权
    • Hydraulic vehicle control system
    • 液压车辆控制系统
    • US4570441A
    • 1986-02-18
    • US506984
    • 1983-06-23
    • Kazuhiro YoshidaTakashi Murakami
    • Kazuhiro YoshidaTakashi Murakami
    • B62D11/04B60K17/10B62D11/18F15B13/09F16H39/46
    • B62D11/18
    • A control system for a hydraulic vehicle having a pair of bidirectional travel motors driven by respective pumps via respective travel valves, and implement actuators, including a swing motor, driven by the pumps via two parallel connections of pilot-operated implement valves. For making possible the straight travel of the vehicle, either forwardly or rearwardly, while any of the implement actuators is being driven by either pump, a straight travel valve is provided for the on-off control of communication between the forward travel ports, and between the rearward travel ports, of the two travel motors. Normally held closed under spring pressure, the straight travel valve is pilot opened by a series connection of two straight travel control valves, which delivers pilot control fluid to the straight travel valve when the travel valves are both hand operated to set the two travel motors into rotation in the same direction. The straight travel control valves receive the pilot control fluid from implement control valves provided for the pilot actuation of the implement valves. Thus the two travel motors when set into rotation in the same direction are driven by the combined power fluid from the two pumps if then any of the implement control valves is being operated for activating the corresponding implement actuator or actuators.
    • 一种用于液压车辆的控制系统,其具有通过相应的行程阀由相应泵驱动的一对双向行驶马达,并且实现包括由所述泵经由两个先导操作的工具阀的并联连接的回转马达的致动器。 为了使车辆可以向前或向后直线行进,而任何工具致动器都由任一个泵驱动,提供直行程阀,用于开启前进行驶口之间的通信的开关控制,以及在 两个行驶马达的向后行程端口。 通常在弹簧压力下保持关闭,直行程阀由两个直行程控制阀的串联连接引导开启,当行程阀均手动操作以将两个行驶马达设置成直行程控制阀时,将先导控制流体输送到直行程阀 旋转方向相同。 直行程控制阀从为器具阀的先导操作提供的工具控制阀接收先导控制流体。 因此,当两个行进电动机在相同方向上旋转时由来自两个泵的组合的动力流体驱动,如果然后任何一个工具控制阀被操作以启动相应的工具致动器或致动器。