Hydraulic power steering system

Claim 1

A hydraulic power steering parking system for motor vehicles including wheels thereon and provided with power steering means comprising a multiple-position final valve control element; a hydraulic brake system having means connected for supplying amplified energy impulses thereof coupled to said multiple-position final valve control element, said multiple-position final valve control element having a plurality of final control elements and a slide valve for control of each of the plurality of final control elements, two of said final control elements receiving pressure medium selectively from said slide valves for actuation of the final control elements, a plurality of sensors for detecting the rotational speed of said wheels, a power steering transducer for sending out signals in accordance with the rotational position of a steering mechanism, a magnetic valve for controlling anti-lock means for the wheels, an electronic control means responsive to signals received from said plurality of sensors and said power steering transducer effective for sending signals only during predetermined speed ranges to said magnetic valve which controls by means of said slide valve one of the two final control elements, at least four of said plurality of final valve control elements constituting an anti-lock control valve means for each wheel brake, and said electronic control means, said magnetic valve and said two final control elements jointly performing control of said power steering means.