Valve arrangement, valve device, shock absorber and method of regulating pressure in a fluid flow

A shock absorber comprising a valve device for electrically regulating a pressure in a hydraulic fluid flow in the valve device in response to an actuating force during a normal operation and mechanically regulating said pressure during a fail-safe operation when no actuating force is present, the valve device comprising:

• a valve chamber;
• a valve seat arranged in said valve chamber;
• a first spring member arranged in the valve chamber to be moveable within the valve chamber in an axial direction to interact with the valve seat to provide a first restriction by which the hydraulic fluid flow is restricted during active control operation;
• and
• a second spring member arranged in the valve chamber such that the second spring member with the first spring member provides a second restriction by which the hydraulic fluid flow is restricted during fail-safe operation, the second spring member further arranged in the valve chamber to define a first fluid flow space, a second fluid flow space, and an active control flow channel that fluidly connects the first fluid flow space with the second fluid flow space, wherein the second spring member is further adapted with a through-hole through which an actuating member is adapted to control the interaction between the first spring member and the valve seat, and the second spring member is adapted so that the active control flow channel extends between the actuating member and a boundary of said through-hole of the second spring member,
• wherein during active controlled operation, the active control flow channel is open, and during fail-safe operation, the active control flow channel is substantially closed by the first spring member.

A valve arrangement for regulating a pressure in a hydraulic fluid flow in a valve device in response to an actuating force during an active control operation and for mechanically regulating said pressure during a fail-safe operation when no actuating force is present, the valve arrangement comprising:

• a first spring member adapted to be arranged in a valve chamber of the valve device to be at least partly moveable within the valve chamber in an axial direction to interact with a valve seat to provide a first restriction by which the hydraulic fluid flow is restricted during active control operation, and
• a second spring member comprising two or more support members adapted with an inclined geometry relative a major surface of the second spring member so that they extend at least partly away from the first spring member, the second spring member adapted to be arranged in the valve chamber to provide a second restriction by which the hydraulic fluid flow is restricted during fail-safe operation, the second spring member further adapted to be arranged in the valve chamber to define a first fluid flow space and a second fluid flow space, and further adapted to be arranged so that an active control flow channel fluidly connects the first fluid flow space with the second fluid flow space,
• wherein during active control operation, the active control flow channel is open, and during fail-safe operation, the active control flow channel is substantially closed by the first spring member.