Hydraulic system for power steering of motor vehicle, has pump to deliver medium into accumulator by check valve that branches runback provided with bypass valve, which is selectively closed or opened to adjust pressure value in accumulator

摘要

The system has a pump to deliver hydraulic medium into an accumulator (13) by a check valve. The check valve branches a runback provided with a bypass valve (20) into a tank for the medium. The bypass valve is selectively closed or opened to adjust the pressure value in the accumulator. A pressure control valve is assigned as steering valve to operating chambers of a steering cylinder, which are connected together by a fail-safe-valve.