Abstract: An end-stop control valve includes a piston assembly, a valve disc stack-up, and a catch piston, wherein the piston assembly is configured such that, when a contact surface of the piston assembly contacts a contact surface of the catch piston such that hydraulic fluid cannot flow around the piston assembly during an end-of-stroke damping event, the end-stop control valve is configured to operate, first, such that hydraulic fluid flows through the piston assembly and bypasses the valve disc stack-up, and second, such that hydraulic fluid flows through the piston assembly and deflects the valve disc stack-up.

Abstract: A hydraulic vibration damper includes a housing assembly and a rod assembly. The housing assembly includes a main housing, an end cap and a rebound cut off (RCO) assembly. The rod assembly includes a hollow piston rod coupled to a main piston assembly. The main piston assembly includes a main piston that is displaced along the main housing between extension and compression directions. The RCO assembly is disposed between the main housing and the hollow piston rod and includes an RCO piston and an RCO flask. The RCO flask has a flask body including at least one flask passage defined therein that communicates hydraulic fluid along the flask body.

Abstract: A hydraulic vibration damper comprises a damper tube having a hollow main body, a first end, and a second end opposite to the first end, a piston rod that extends into the damper tube through the second end of the damper tube, a primary piston mounted on the piston rod inside the damper tube, a secondary piston mounted on the piston rod inside the damper tube, and a two-stage jounce cut off assembly mounted directly to, and in direct contact with, an inner surface of the hollow main body of the damper tube, wherein the jounce cut off assembly is located between the first end of the damper tube and the secondary piston, and wherein the jounce cut off assembly is configured to increase a hydraulic resistance to movement of the piston rod through the damper tube when the secondary piston engages the jounce cut off assembly.

Abstract: A hydraulic vibration damper includes a housing assembly and a rod assembly. The housing assembly includes a main housing, an end cap and a rebound cut off (RCO) assembly. The rod assembly includes a hollow piston rod coupled to a main piston assembly. The main piston assembly includes a main piston that is displaced along the main housing between extension and compression directions. The RCO assembly is disposed between the main housing and the hollow piston rod and includes an RCO piston and an RCO flask. The RCO flask has a flask body including at least one flask passage defined therein that communicates hydraulic fluid along the flask body.

Abstract: An end-stop control valve can progressively add end-of-stroke damping resistance to complement the damping force provided by a main piston in a damper tube. The end-stop control valve may include a piston that selectively engages with a catch piston, both of which are longitudinally movable within the damper tube. To reduce bypass around the piston, a piston band wrapped at least partially around the piston may engage with a sidewall of the catch piston just prior to engagement of the catch piston and the piston, although at least some hydraulic fluid can flow through a pathway of the piston band. A spring disc that moves with the piston may also engage with the catch piston just prior to engagement between the catch piston and the piston. The spring disc may elastically deform to contribute end-of-stroke resistance leading up to engagement of the piston and the catch piston.

Abstract: An end-stop control valve can progressively add end-of-stroke damping resistance to complement the damping force provided by a main piston in a damper tube. The end-stop control valve may include a piston that is secured on a piston rod and selectively engages a catch piston, both of which are longitudinally movable within the damper tube. As the piston approaches the catch piston, an annular pocket of hydraulic fluid is created longitudinally and radially between the piston and the catch piston. As the piston continues to approach the catch piston, a cross-sectional area through which hydraulic fluid exits the pocket decreases, thereby gradually increasing the resistance of the end-stop control valve. In addition, a spring disc secured on the piston rod may contact a valve seat on the catch piston and provide resistance by elastically deforming in a longitudinal direction before the contact surfaces of the piston and catch piston engage.