Adjustable damping valve with a fail-safe damping force characteristic
AssigneeZF Friedrichshafen AG
InventorsSteffen Heyn, Bernd Zeissner
Life of this patent
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Abstract
An adjustable damping valve including an actuator, which exerts an actuating force on a valve body against the force of a spring to influence the throttle cross section which determines the damping force, where an emergency valve is connected in parallel with the throttle cross section with respect to the flow direction of the damping medium, where the two control surfaces of the valve body move in the axial direction and can thus can come to rest alternately on the two valve seating surfaces, and where the valve body is divided into two parts in the longitudinal direction, and each valve body assembly has its own control surface.
Claims10
An adjustable damping valve comprising:
- a housing comprising a first valve seating surface and a second valve seating surface;
- a valve body in the housing, the valve body being divided axially into a first valve body assembly comprising a first control surface and a second valve body assembly comprising a second control surface, said valve body and housing defining a cross-section of a throttle therebetween;
- a spring acting on the valve body;
- an actuator configured to exert an adjusting force on the valve body against a force of the spring to influence the cross section of the throttle which determines a damping force;
- and
- an emergency valve connected in parallel with the cross section of the throttle with respect to a flow direction of the damping medium,
- wherein when the valve body moves axially, the first control surface and the second control surface can alternately contact the first valve seating surface and the second vale seating surface.
Dependencies are inferred from the claim text.