Patent · US Active

Hydraulic power steering system

US7942230B2 · kind B2 · utility

5Cited by

12References

10Claims

0Family size

Assignee

ZF Lenksysteme GmbH · DE

Inventors

Walter Kogel · Abtsgmünd, DE
Michael Haegele · Aalen, DE
Manfred Heintschel · Schwäbisch Gmünd, DE

Key dates

Filing date	Feb 10, 2005
Grant date	May 17, 2011
Priority date	—
Expiry date	Oct 17, 2026

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB62D5/092
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A hydraulic power steering system for a vehicle, e.g., an electrohydraulic power steering system for a motor vehicle, includes a servo valve, the relative movement of whose control parts actuates a piston rod of a servo cylinder and changes at least one steering angle of a wheel which is operatively connected to the piston rod, and additionally has an electric servo motor which drives a rack with the servo cylinder for adjusting the steering angle of the wheel in the same direction. In order to provide an electrohydraulic power steering system which is as compactly arranged as possible in the region of its actuator and may be used flexibly for different classes of vehicle, the action of the rack and the piston rod of the servo cylinder is combined, in a parallel arrangement with one another, on an addition member for jointly adjusting the steering angle of the wheel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.