Vehicle suspension systems
Suspension and steering control of motor vehicles
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Anti-lock braking system for the front wheel of a motorcycle
Vibration damper for motor vehicles having an arrangement for varying damping thereof Patent #: 4749069
ApplicationNo. 402009 filed on 09/01/1989
US Classes:188/266.2, Condition actuates valve or regulator188/266.8, With failure or malfunction detection188/282.2Valve actuated by electrical system
ExaminersPrimary: Halvosa, George E. A.
Attorney, Agent or Firm
Foreign Patent References
International ClassF16F 009/46
Foreign Application Priority Data1987-09-17 DE
AbstractA controllable vibration damper for automotive vehicles is disclosed having a damping piston which is axially slidably and sealedly guided in a damping tube, and which subdivides the damping tube filled with a damping medium into two working chambers. The connection between the two working chambers is provided with at least one non-regulated first valve and at least one controllable second valve, which valves are arranged acting hydraulically in parallel in respect to one another. In order to be able to regulate the effective damping force continuously in wide ranges, for the adjustment of damping hardness, the controllable valve will periodically open and close in rapid sequence in dependence upon pulsed control signals.