发明授权
- 专利标题： Vehicle steering systems
- 专利标题（中）： 车辆转向系统
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申请号： US96163申请日： 1987-09-11
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公开(公告)号： US4878556A公开(公告)日： 1989-11-07
- 发明人: David L. Wells
- 申请人： David L. Wells
- 申请人地址： TX Houston
- 专利权人： Stewart & Stevenson Services, Inc.
- 当前专利权人： Stewart & Stevenson Services, Inc.
- 当前专利权人地址： TX Houston
- 主分类号： B62D7/15
- IPC分类号： B62D7/15
摘要：
A steering system for a tow tractor having steerable front and rear road wheels is disclosed. The steering system comprises a steering wheel for turning the front road wheels and a hydrauclic servo valve for turning the rear road wheels through an angle proportional to the turning of the front road wheels.A rear mechanical push-pull cable is used for signaling a feedback angular quantity of the turning of the rear road wheels to the servo valve. A front mechanical push-pull cable is used for signaling an input angular quantity of the turning of the front road wheels to the servo valve. A hydraulic clutch is used for remotely engaging and disengaging the front mechanical system having at least two steering modes for the front and rear road wheels.A method of operating a vehicle having mechanical controls for steerable front and rear road wheels is disclosed that eliminates the dangers of a failure mode inherent in an electronic control over hydraulic four-wheel steering device.
公开/授权文献
- US6024557A Extrusion head for blow-molding apparatus 公开/授权日：2000-02-15
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