发明授权
- 专利标题: Hydraulic circuit system for a vehicle height control device
- 专利标题(中): 液压回路系统用于车辆高度控制装置
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申请号: US316918申请日: 1989-02-28
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公开(公告)号: US4958850A公开(公告)日: 1990-09-25
- 发明人: Shuuichi Buma , Hiroyuki Ikemoto
- 申请人: Shuuichi Buma , Hiroyuki Ikemoto
- 申请人地址: JPX
- 专利权人: Toyota Jidosha Kabushiki Kaisha
- 当前专利权人: Toyota Jidosha Kabushiki Kaisha
- 当前专利权人地址: JPX
- 优先权: JPX63-50167 19880303; JPX63-284278 19881110
- 主分类号: B60G17/04
- IPC分类号: B60G17/04
摘要:
A hydraulic circuit system for a vehicle height control device is provided comprising actuators for increasing and decreasing vehicle heights as respective results of the supply and the discharge of working fluid to and from their working fluid chambers, a supply passage means and a discharge passage means for supplying and discharging working fluid to and from the chambers, respectively, control valve means for controlling the supply and the discharge of working fluid, cut-off valve means provided in the supply and discharge passage means and adapted to remain in their closed position so long as the pressure within the supply passage means is not more than a predetermined value. The system further comprises a bypass valve means for selectively communicating the supply and the discharge passage means with each other so that the pressure within the supply passage means may be controlled. The opening and closing of the cut-off valve means can be performed by solely controlling the bypass valve means, thereby reducing the electric power required to operate the system. Undesired decrease in vehicle height can positively be prevented by the cut-off valve means even in the event where the control valve means is shifted for supplying the working fluid to the chambers under the condition where the pressure within the supply passage means is relatively low.
公开/授权文献
- US5421149A Eccentric oscillating system 公开/授权日:1995-06-06