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热词
    • 47. 发明授权
    • Hydraulic control means, especially a steering means
    • 液压控制装置,特别是转向装置
    • US4006663A
    • 1977-02-08
    • US564278
    • 1975-04-02
    • Johannes Vagn BaatrupThorkild Christensen
    • Johannes Vagn BaatrupThorkild Christensen
    • B62D5/08B62D5/09F15B11/02F15B13/042
    • F15B11/02B62D5/08B62D5/09F15B2211/20538F15B2211/30505F15B2211/3051F15B2211/30525F15B2211/3054F15B2211/327F15B2211/329F15B2211/50518F15B2211/5151F15B2211/55F15B2211/6054F15B2211/61F15B2211/613F15B2211/6355F15B2211/7054
    • The invention relates to a hydraulic control apparatus of the type used in vehicle steering systems. In all such systems there is a reversible type hydraulic motor connected to the steering linkage. The motor has complementary expansible chambers. With the use of control means pressurized fluid is selectively delivered to one chamber which is caused to expand concomitantly with the collapsing of the other chamber from which fluid is returned to a sump. Forces transmitted to the hydraulic motor through the steering linkage by reason of the wheels striking objects such as stones or curbs cause an objectionable effect by reason of fluid being forced out of the motor back into the system. This effect is avoided by providing two valve assemblies for the two ports of the reversible motor which function in the absence of a steering command as ordinary one way check valves which prevent the undesired flow of fluid from either of the motor ports. Each of the valve assemblies has pressure responsive means and is openable when the pressure responsive means is acted upon by pressure. The pressure responsive means of each valve assembly is fluidly connected to the upstream side of the other valve assembly so that both valve assemblies will be open during the normal power steering operation wherein pressurized fluid is admitted to one side of the actuating motor and withdrawn from the other side thereof.
    • 本发明涉及一种用于车辆转向系统的液压控制装置。 在所有这样的系统中,存在连接到转向连杆的可逆式液压马达。 电动机具有互补的可膨胀室。 通过使用控制装置,加压流体被选择性地输送到一个室,该腔室被引起与另一个腔室的塌缩同时膨胀,从该腔室将流体返回到贮槽。 由于车轮撞击物体如石块或路缘石,通过转向连杆传递给液压马达的力,由于流体被迫从电机返回到系统中,造成令人不快的影响。 通过为可逆电动机的两个端口提供两个阀组件来避免这种效果,该两个阀组件在没有转向指令的情况下起作为普通单向止回阀的作用,其防止来自任何一个电动机端口的不期望的流体流动。 每个阀组件都具有压力响应装置,并且当压力响应装置通过压力作用时可以打开。 每个阀组件的压力响应装置流体地连接到另一个阀组件的上游侧,使得在正常动力转向操作期间两个阀组件都将打开,其中加压流体被允许到致动马达的一侧并从 的另一面。