Patent ID: 6352016
Filing Date: 2002-03-05
Classification: B62D,F15B,F16F,Y10T

Abstract:
A hydraulic power steering system, comprising a servo valve, a servomotor configured as one of a hydrostatic motor assembly and a hydraulic displacer assembly and arranged to act as a steering damper, damper-valve arrangements operatively provided on hydraulic lines between the servomotor and the servo valve, the damper-valve arrangements having a circular disc carrier part, with axial bores and with a central bolt which holds circular disc spring plates for controlling some of the axial bores and, on a side of the carrier part facing away from the spring plates, guiding an annular disc for controlling other of the axial bores, a bypass duct hydraulically connecting spaces on sides of the carrier part and arranged in the central bolt, and in that there is arranged axially displaceably, and a piston-like slide within a diametrically widened region of the bypass duct to cooperate with an annular step in the bypass duct in a valve-body-like manner and to be loaded in directions opposite to one another by two helical compression springs, one of the compression springs operating as a function of temperature, so that, below a predetermined temperature, the slide is lifted off from the annular step and simultaneously opens the bypass duct.