Adjustable damping valve device
AssigneeZF Friedrichshafen AG
InventorAndreas Förster
Life of this patent
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Abstract
An adjustable damping valve device (27), in particular for a vibration damper, comprises a first valve (47) and an emergency operation valve (61), both of which are actuated by magnetic force. The emergency operation has a valve body (61) which is preloaded in a closed position by at least one valve spring. A pressure-relief valve (85) is connected hydraulically in parallel with the emergency operation valve (61) so that the damping force is determined by the pressure-relief valve (85) when the emergency operation valve (61) is closed. The pressure-relief valve (85) is arranged in the valve body (63) of the emergency operation valve.
Claims5
An adjustable damping valve device for a vibration damper comprising:
- a main stage valve (73);
- a first valve (47) and an emergency operation valve (61), both said first valve and said emergency valve being actuated by magnetic force, said the emergency operation valve (61) comprising an axially moveable valve body (63) preloaded in a closed position by at least one valve spring;
- a pressure relief valve (85) connected hydraulically in parallel with said emergency operation valve (61) so that a damping force is determined by said pressure-relief valve (85) when said emergency operation valve (61) is closed, said pressure-relief valve (85) being arranged in said axially moveable valve body (63) of said emergency operation valve (61);
- wherein said main stage valve (73) is controlled by said first valve (47);
- and said emergency valve (61) is arranged hydraulically in series with said first valve (47).
Dependencies are inferred from the claim text.