Hydraulic fluid in a cylinder's lower chamber is introduced into a back pressure chamber through the outer periphery of an extension-side main valve during a compression stroke of a piston rod. This eliminates the necessity of forming paths by arranging a plurality of discs and a check valve, the paths for introducing into the back pressure chamber the hydraulic fluid in the cylinder's lower chamber that becomes an upstream chamber during the compression stroke. This makes it possible to decrease the axial length of a shaft portion of the piston rod and therefore the entire length of a cylinder, and also downsize a shock absorber.

A suspension system including four dampers where each damper includes compression and rebound chambers. The suspension system has four hydraulic circuits, each including a cross-over hydraulic line that extends between dampers located at opposite corners of the vehicle (i.e., between the front left and back right dampers or between the front right and back left dampers). The suspension system further includes four electromechanical comfort valves that open and close four bridge hydraulic lines that extend between the cross-over hydraulic lines at each corner of the vehicle. Each cross-over hydraulic line is connected to a manifold assembly by a corresponding manifold hydraulic line. The manifold assembly includes four manifold valves that are connected to a pump assembly and two manifold comfort valves. All six comfort valves are electromechanical valves that can be actuated to control the roll and pitch of the vehicle during cornering, braking, and acceleration.

A suspension including a spring interposed between the body (B) of the vehicle and the wheel (W); a regenerative hydraulic shock-absorbing unit comprising a hydraulic shock-absorber arranged parallel to the spring, a motor and pump unit with a volumetric hydraulic machine and an electric machine coupled to the hydraulic machine), and an electronic control unit arranged to control the torque of the electric machine. A hydraulic actuator is arranged in series with the spring. A reservoir and a hydraulic circuit are connected to each other, the hydraulic shock-absorber, the hydraulic machine the hydraulic actuator and the reservoir. The hydraulic circuit includes a valve assembly for controlling the flow of a working fluid between the hydraulic shock-absorber, the hydraulic machine, the hydraulic actuator and the reservoir.

A vibration damper for a motor vehicle having at least one damper tube, which includes at least one damper fluid, a piston rod having a piston, which is guided axially in the damper tube, and at least one valve unit. The valve unit includes at least three flow paths for the damper fluid. The first flow path includes a first valve for a first damper setting. The second flow path includes a second valve for a second damper setting and a variable throttle. The third flow path includes a check valve, wherein the second damper setting is softer than the first damper setting and the cross section of the second flow path is adjustable at least partially by the variable throttle.

Some examples include a damper having an outer tube with a piston reciprocally mounted on an interior of the outer tube. A dampening force generating mechanism may be mounted on the outer tube within a threshold distance from a first end of the outer tube to control a dampening property of the piston. In addition, a vehicle interface adapter may seal the first end of the outer tube. The vehicle interface adapter may include an insertion portion extending outward from the first end of the outer tube. The insertion portion is able to be inserted into a cup-shaped portion of a vehicle attachment receptacle. The insertion portion may have a cylindrical wall forming a cylinder that is aligned coaxially with the outer tube.

A mechanical bypass for a shock assembly is disclosed herein. The assembly has a damper chamber having a compression portion and a rebound portion. There is further an external reservoir in fluid communication with the rebound portion of the damper chamber via a flow path. A valve is coupled with the flow path, the valve to meter a flow of the working fluid through the flow path. A bypass port to the external reservoir is provided in the flow path and bypasses the valve. A mechanical relief valve is provided in the bypass port to block a fluid flow though the bypass port until a blow-off pressure that is higher than a normal operating pressure and less than a burst pressure of the damping chamber is provided thereon.

A vehicle height adjustment device includes a rear suspension, an electromagnetic valve control unit, and a weight estimation unit. The rear suspension includes a support member. The electromagnetic valve control unit determines a target movement based on an interrelation between the target movement and a weight applied to a vehicle, under which the target movement is set to an upper limit when the weight is larger than a predetermined weight, so that an actual movement of the support member reaches the target movement. The electromagnetic valve control unit determines the target movement based on a temporary weight. The weight estimation unit increases the temporary weight, even when the actual movement reached the target movement. The electromagnetic valve control unit decreases the target length, even when the temporary weight increased. The weight estimation unit estimates as the weight the temporary weight when the actual length has finally reached the target length.

The present disclosure relates to a shock absorber with hydraulic load regulation with a rod ending in a pin, which incorporates a longitudinal channel such that the shock absorber includes a frequency amplifier which, in turn, includes a housing, a floating piston which slides along the inside of the housing achieving a seal, and a pressure control valve, wherein the pressure control valve is configured to open when the amplifier chamber reaches a certain pressure level, enabling the outlet of fluid from the amplifier chamber such that the pressure of the amplifier chamber acts on the floating piston, which moves to regulate the flow of fluid through the piston by means of an elastic element acting on valves.

A suspension device includes: a suspension including a damping device which damps a force generated between a vehicle body and a wheel; and a damping force control unit that increases a damping force of the damping device so as to be greater than the damping force generated when an acceleration of change in a stroke amount is less than a predetermined value determined in advance, when the acceleration of the change in the stroke amount is equal to or greater than the predetermined value, in which the stroke amount is an amount of displacement from a reference position of the wheel with respect to the vehicle body in an extension direction of the suspension.

A suspension device includes: a damping device that damps a force generated between a vehicle body and a wheel of a vehicle; a determination unit that determines whether the vehicle is jumping, using an acceleration of the vehicle in a front-rear direction, an acceleration of the vehicle in a left-right direction, and an acceleration of the vehicle in a vertical direction; and a damping force control unit that increases a damping force of the damping device so as to be greater than the damping force generated when the determination unit does not determine that the vehicle is jumping, when the determination unit determines that the vehicle is jumping.