发明授权
- 专利标题： Hydraulic system for variable assist power steering system
- 专利标题（中）： 可变辅助动力转向系统液压系统
-
申请号： US213022申请日： 1988-06-29
-
公开(公告)号： US4875542A公开(公告)日： 1989-10-24
- 发明人: Koh Uchida , Takashi Kurihara , Makoto Miyoshi
- 申请人： Koh Uchida , Takashi Kurihara , Makoto Miyoshi
- 申请人地址： JPX Yokohama
- 专利权人： Nissan Motor Co., Ltd.
- 当前专利权人： Nissan Motor Co., Ltd.
- 当前专利权人地址： JPX Yokohama
- 优先权： JPX62-161576 19870629
- 主分类号： B62D6/02
- IPC分类号： B62D6/02 ; B62D6/00
摘要：
A variable assist power steering system employing a fluid distributor circuit of the open center type is disclosed. The fluid distributor circuit includes two parallel fluid flow paths connected to both chambers of a power cylinder respectively to produce a pressure differential between the both cylinder chambers in response to steering torque. For modulating the valve characteristics, two additional variable flow restrictors are arranged in series with two main variable flow restrictors and two bypass paths are arranged to bypass the main variable flow restrictors, respectively. The bypass paths are provided with variable flow orifice valves, respectively, which valves are controlled in response to a turning direction of a steering wheel and also to some external signal, such as vehicle speed.
公开/授权文献
信息查询
IPC分类:
