B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
180/55
B62D 5/08 (2006.01) B62D 5/09 (2006.01) B62D 5/22 (2006.01)
Patent
CA 1113016
ABSTRACT OF THE DISCLOSURE A hydraulically operated steering system for vehicles has an actuating means and an adjusting motor for the steered vehicle parts. The actuating means is constituted by a rack of a rack and pinion steering gear. The adjusting motor has two working chambers with which are respectively associated pairs of spring-loaded seated valves. Inlet valves are provided which are connected to a hydraulic pressure accumulator, via hy- draulic lines and to the respective working chambers of the adjusting motor via further lines. Each inlet valve comprises a valve seat, a valve member constituted by a ball and a compression spring which is located in a spring chamber of each inlet valve and which urges the ball against its seat. The two inlet valves are connected via springs in opposite directions to the actuating means. Outlet valves are connected to the respective working chambers of the adjusting motor via hydraulic lines and via a common return flow connec- tion to a reservoir. Each outlet valve comprises a valve seat, a valve member and a tension spring which urges the valve member against its seat. The outlet valves are connected via springs to the actuating means. A piston rod and piston of the adjusting motor are arranged fixed on the vehicle, while the cylinder casing thereof is movable in relation to them. The valve seats are rigidly connected to the cylinder casing of the adjusting motor. In the neutral position of the steering system in which the actuating means is free from force the inlet valves are closed. They are adjusted to a pressure which is somewhat higher than the pressure in the accumulator. Both outlet valves are open. Both working chambers of the adjusting motor are un- pressurised.
332731
Swabey Ogilvy Renault
Zahnradfabrik Friedrichshafen Ag
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