A damper assembly includes a cylinder defining a chamber. The damper assembly includes a body supported by the cylinder and having a first surface and a second surface opposite the first surface. The body defines a passage extending from the first surface to the second surface. One of the first surface or the second surface define a slope at the passage. The damper assembly includes a check disc at the slope, the check disc selectively restricting fluid flow through the passage.

A damper assembly includes a pressure tube defining a chamber. The damper assembly includes a body supported by the pressure tube. The body has a first surface and a second surface opposite and spaced from the first surface along an axis. The body defines a passage extending from the first surface to the second surface. The damper assembly includes an orifice disc movable from an unflexed position to a first flexed position and movable from the first flexed position to a second flexed position. The orifice disc in the unflexed position is spaced from the first surface radially outward and radially inward of the passage. The orifice disc in the first flexed position is spaced from the first surface radially outward of the passage and abuts the first surface radially inward of the passage. The orifice disc in the second flexed position abuts the first surface radially outward and radially inward of the passage.

Solar tracker systems include a torque tube, a column supporting the torque tube, a solar panel attached to the torque tube, and a damper assembly. The damper assembly includes an outer shell surrounding an inner shell and defining an outer fluid channel. A piston is positioned within the inner shell and moveable relative thereto. A locking valve of the damper assembly includes a shaft extending into a chamber and a seal attached to the shaft. The shaft is selectively moveable axially within the chamber along an extension axis between an unsealed position in which the seal is spaced from a chamber wall and a flow path is defined that extends from within the inner shell, through the chamber, and to the outer fluid channel, and a sealed position in which the seal contacts the chamber wall and the locking valve obstructs the flow path.

A spring for a check valve which can be used in particular in controllable vibration dampers, said spring comprising a flat main body with a first surface, a second surface and a centre point, and two or more spring arms, which cooperate resiliently with the main body and in the unloaded state protrude from the first surface or the second surface, the spring arms forming a free end and having a longitudinal axis that runs through the free end and tangentially to a circle about the centre point of the main body. The invention further relates to a check valve having a spring of this kind. In addition, the invention relates to a controllable vibration damper which comprises such a check valve, and to a motor vehicle having a controllable vibration damper of this kind.

A vibration damping device for a vehicle includes: a first attachment member attached to a first member; a second attachment member attached to a second member; a first liquid chamber and a second liquid chamber configured to change volumes according to relative displacement between the first attachment member and the second attachment member; and an orifice passage configured to cause a liquid to flow between the first liquid chamber and the second liquid chamber according to changes in the volumes of the first liquid chamber and the second liquid chamber. The liquid contains a non-Newtonian fluid whose viscosity decreases as a shear rate increases, the orifice passage includes a first communication port communicating with the first liquid chamber and a second communication port communicating with the second liquid chamber, and an opening area of the first communication port is different from an opening area of the second communication port.

One or more systems are disclosed for controlling dampening forces provided by a shock absorber by means of a piston face and an additional dampening shim underneath the piston face in the shock absorber. The piston face is coupled to a piston and the dampening shim is positioned beneath a bottom surface of the piston face. The piston face includes a first set of openings and a second set of openings on the piston face that have differing sizes and diameters. The dampening shim has a diameter that is less than the diameter of the piston face. When fluid pressure is applied against the underside of the dampening shim, the dampening shim partially blocks the first set of openings and fully blocks the second set of openings on the piston face from the bottom of the piston face, which thereby affects the overall dampening of the shock absorber.

Methods and systems for adjusting a tuning state of a pendulum damper are provided. In one example, an engine system is provided that includes a crankshaft coupled to a plurality of pistons in a plurality of cylinders. The crankshaft includes a plurality of pendulums coupled to a plurality of cheeks and a pendulum tuning mechanism coupled to an associated pendulum included in the plurality of pendulums or coupled to an associated pendulum in a torque converter and configured to tune damping characteristics of the associated pendulum based on an engine order.

The invention relates to a damper unit (40) comprising: a hydraulic cylinder (50) having a hydraulic piston (51) movably mounted therein, which hydraulic piston is coupled to a piston rod (70) and divides the hydraulic cylinder (50) into two hydraulic chambers (52, 53) which are fluidically interconnected via at least one hydraulic channel (54); and a pneumatic cylinder (60) having a pneumatic piston (61) movably mounted therein, which pneumatic piston is coupled to the piston rod (70) and divides the pneumatic cylinder (60) into two pneumatic chambers (62, 63) which are fluidically interconnected via at least one pneumatic channel (64); wherein the value of the volume change of the hydraulic chambers (52, 53) during a movement of the hydraulic piston (51) is different and the hydraulic chambers (52, 53) are fluidically coupled to an equalisation volume (80).

A fluid damping structure is provided that includes an inner and outer annular elements, first and second ring seals, first and second outer annular seals. The inner annular element has an outer radial surface and a plurality of annular grooves disposed in the outer radial surface. The outer annular element has an inner radial surface. A damping chamber is defined by the inner and outer annular elements, and the first and second inner ring seal. A first lateral chamber is disposed on a first axial side of the damping chamber. A second lateral chamber is disposed on a second axial side of the damping chamber. A plurality of fluid passages are disposed in at least one of the inner annular element or the inner ring seals. The fluid damping structure is configurable in an open configuration and a closed configuration.

The invention is so configured that a main valve is disposed under a piston valve, that a sub valve for varying the set load of the main valve is provided in a piston case located above the piston valve, and that a first valve element of the sub valve is slidably sealed onto a case member with a metallic seal only at a single place.