Adjustable damping valve device

Patent metadata

Field	Value
Publication number	US-9310810-B2
Application number	US-201113993748-A
Country	US
Kind code	B2
Filing date	Nov 18, 2011
Priority date	Dec 17, 2010
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

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.

First claim

The invention claimed is:

1. 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 ).

2. The adjustable damping valve device according to claim 1 , wherein said pressure-relief valve ( 85 ) is arranged in a receiving channel ( 87 ) extending parallel to the movement direction of said valve body ( 63 ).

3. The adjustable damping valve device according to claim 1 , additionally comprising a common flow-off opening ( 99 ); and wherein said emergency operation valve ( 61 ) and said pressure-relief valve ( 85 ) is connected to said common flow-off opening ( 99 ).

4. The adjustable damping valve device according to claim 1 , additionally comprising a pressure compensation channel ( 95 ) within said valve body ( 63 ) of said emergency valve ( 61 ); a valve seat surface ( 67 ) and an exit orifice ( 97 ) for said pressure-relief valve ( 95 ) within said emergency valve ( 61 ); wherein said emergency operation valve ( 61 ) is constructed as a seat valve; and wherein said pressure compensation channel ( 95 ) of said valve body ( 63 ) of said emergency operation valve ( 61 ) is separated radially by said valve seat surface ( 67 ) from said exit orifice ( 97 ) of said pressure-relief valve ( 85 ).

5. The adjustable damping valve device according to claim 4 , wherein an inflow to said pressure-relief valve ( 85 ) takes place via said pressure compensation channel ( 95 ) of said valve body ( 63 ).

Assignees

• Förster Andreas
• Zahnradfabrik Friedrichshafen

Inventors

• Förster Andreas

Classifications

• F16F2222/06

  Magnetic or electromagnetic · CPC title

• F16F15/023

  using fluid means · CPC title

• F16F2222/12

  Fluid damping · CPC title

• Y10T137/7793

  With opening bias [e.g., pressure regulator] · CPC title

• F16F15/03

  using {magnetic or} electromagnetic means (F16F9/53, {F16F15/005} take precedence) · CPC title