Patent · US Expired

Hydraulic servo-assisted steering system for vehicles and a controlling method for a steering system of this type

US7044046B2 · kind B2 · utility

3Cited by

12References

19Claims

0Family size

Assignee

ZF Lenksysteme GmbH · DE

Inventors

Uwe Wietzel · Schechingen, DE
Rainer Schaenzel · Oberkochen, DE
Andreas Kruttschnitt · Heidenheim, DE

Key dates

Filing date	Nov 21, 2002
Grant date	May 16, 2006
Priority date	—
Expiry date	Nov 21, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B19/002
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

For a hydraulic servo-assisted steering system for motor vehicles, classifying storage of the respectively measured, actual valve characteristic curves is provided and, corresponding to this, energization characteristic curves for the magnetic actuator of the converter are provided, which may be paired in a classified manner in order to compensate for deviations from a predefined set valve characteristic curve, and a testing method for such a hydraulic servo-assisted steering system is provided, in which the loading pressure of the servo actuator is influenced as a function of an input steering torque and in a speed-dependent manner, the speed-dependent influence being effected via the electro-hydraulic converter, whose energization may be set in a manner superimposed on the speed-dependent definition with regard to the correction of tolerances.

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