Controllable hydraulic vibration damper for vehicle bodywork - has damping piston at piston rod in cylinder which has valve discs for variable passage openings and by=pass controlled by electromagnet

摘要

The bypass for tension and compression operation of the vibration damper is controlled by the electromagnet (5) across a valve slide (6), so that the bypass flow results thorugh the throttle valve body, with the spring (32) pressing the valve slider downwards, and the opening (29) frees the pressure stage bypass duct (21). The valve slider (6) is designed as a tube, and the piston rod (2) or a piston rod extension (3) is arranged longitudinally movable inside a longitudinal bore (3). The switching position with no current supplied to the electromagnet (5), effects the shock absorber characteristic hard extension stage, soft compression stage. With current supplied to electromagnet (5), corresp. extension stage is soft and compression stage is hard. ADVANTAGE - Developed as small unit, which ensures that large flow cross section is attained for bypass.