Vehicle car steering system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 8, 1987
Grant Date -
N/A
app pub date -
Oct 20, 1986
filing date -
Oct 19, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydraulic power assisted vehicle steering system having an input member connected with a manual steering wheel to be rotated thereby, an output member coaxial with the input member and connected with a vehicle steering mechanism, a torsion bar connecting the input member with the output member, a hydraulic power assist cylinder provided in the vehicle steering mechanism, a control valve for selectively applying a hydraulic pressure to the cylinder to produce a hydraulic assist force. The control valve includes a valve member connected with the output member for limited axial displacements. A locking device is provided to lock the vlave member at a position offset from a neutral position to hydraulically bias the cylinder when the input member is steered beyond a predetermined value so that a centering or restoring force is produced to provide a self centering function.
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