Patent ID: 10655702

Abstract:
A controllable vibration damper may include a cylinder tube with hydraulic fluid, a piston movable axially within the cylinder tube along an axis and that divides the cylinder tube into two working spaces, a piston rod parallel to the cylinder tube axis and connected at one end to the piston, fluid passages from one working space into another working space, a first valve subassembly on a first fluid passage for damping piston movement in a first direction, and a second valve subassembly on a second fluid passage for damping piston movement in a second direction. Each valve subassembly may include a valve disk seated on a valve seat in a closed position and spaced apart from the valve seat in an open position, as well as a pilot chamber containing an adjustable pressure that pushes the valve disk into the closed position. One of the pilot chambers may be delimited by a base, a cylindrical side wall fixed relative to the base and arranged coaxially with the cylinder tube axis, and a dimensionally stable cover that is held radially within the cylindrical side wall and can be moved parallel to the cylinder tube axis.