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    • 48. 发明申请
    • Power Steering Device and Method of Controlling the Power Steering Device
    • 动力转向装置及控制动力转向装置的方法
    • US20080006469A1
    • 2008-01-10
    • US10567829
    • 2004-08-09
    • Mitsuo SasakiTadaharu YokotaToshimitsu SakakiMichiya Hiramoto
    • Mitsuo SasakiTadaharu YokotaToshimitsu SakakiMichiya Hiramoto
    • B62D5/00B62D6/00
    • B62D5/0481B62D5/065B62D5/30
    • A steering system includes a hydraulic power cylinder 5 that assists a steering force of a rack-and-pinion mechanism 4, and a first hydraulic pressure supply mechanism 8 having a first trochoid pump 23 selectively supplying hydraulic pressure to two hydraulic pressure chambers 15a and 15b of the hydraulic power cylinder via first and second fluid passages 6 and 7, and a first electric motor 24 for the first trochoid pump. When the first hydraulic pressure supply mechanism becomes failed, a second hydraulic pressure supply mechanism 11 is operated responsively to a command signal from a control unit 14 to selectively supply hydraulic pressure via third and fourth fluid passages to either one of the hydraulic pressure chambers.Thus, it is possible to positively apply a steering assist force by means of the second hydraulic pressure supply mechanism 11, thereby reducing a driver's operating force applied to a steering wheel.
    • 转向系统包括:辅助齿条齿轮机构4的转向力的液压动力缸5和具有选择性地向两个液压室15a供给液压的第一副摆动泵23的第一液压供给机构8;以及 15b的第一和第二流体通道6和7的液压动力缸,以及用于第一次摆线泵的第一电动机24。 当第一液压供给机构发生故障时,响应于来自控制单元14的指令信号响应于第二液压供给机构11,通过第三和第四流体通路选择性地供给液压到任一个液压室。 因此,可以通过第二液压供给机构11积极地施加转向辅助力,从而降低驾驶员施加到方向盘的操作力。