Patent ID: 6068077
Filing Date: 2000-05-30
Classification: B62D

Abstract:
A power steering system, suitable for motor vehicles, having the following characteristics:a steering valve, for controlling a pressure medium for a servomotor, is provided with two inlet seat valves and two outlet seat valves, each with one closing body, wherein the closing bodies of the outlet seat valves are actuatable via an actuating device as a function of a rotary motion of a steering-wheel shaft connected to an input member of the steering system;the closing bodies of the inlet seat valves are hydraulically pressure balanced with reference to a pressure of a pressure source, and by the force of locking springs they keep the inlet seat valves closed in the neutral position of the steering valve;each locking spring is supported at one end on a closing body of one of the inlet seat valves and on the other on the actuating device;the outlet seat valves are open in the neutral position of the steering valve;one inlet seat valve and one outlet seat valve, respectively, are disposed coaxially relative to one another;the effective cross section of the closing bodies of the outlet seat valves is smaller than the effective cross section of the closing bodies of the inlet seat valves,the improvement comprisingthe steering valve is disposed between the input member and an output member of the steering system;the actuating device has at least one actuating lever for actuating the outlet seat valves; andeach locking spring is operatively connected to the actuating lever.