Hydraulic power steering for motor vehicle, has two electrically controllable valve units connected parallel to servo valve and communicating with pressure line and respective feed line, where servo valve is valve with closed center

摘要

The steering has a servo valve (4) connected directly or indirectly with a steering handle (5), and a servo pump (1) supplying hydraulic fluid into a pressure line (3). A servo motor has two workspaces pressurized by the valve, where the valve is a valve with closed center. Two electrically controllable valve units (8a, 8b) are connected parallel to the valve and communicate with the pressure line and respective feed line.