Hydraulic power steering control device for motor vehicle, has sealing joint moving between outer wall of air slide wall and separation portion of hydraulic fluid inlet opening and outlet opening of case

摘要

The device has a cylindrical case (4) in which an air slide valve (2) is slidingly mounted in an axial direction and moved according to the speed of a vehicle by a motor (3). An annular recess (2a) is formed on an outer wall of the valve. A sealing joint (7) made of deformable elastic material moves between the outer wall and a separation portion (4b) of a hydraulic fluid inlet opening (4a) and an outlet opening (4c) of the case.