A vehicle system is provided. The vehicle system includes a vehicle chassis with a plurality of elongated tubular members. The tubular members are structured to be configured in a configuration selected from the group consisting of a coup, a convertible, a truck, a transport vehicle, or a bus.

A shock-absorbing front fork assembly of a motorcycle includes a front fork, a pressure buffering cylinder and a control valve disposed between the front fork and the pressure buffering cylinder and electrically connected with a brake system to control the communication between the front fork and the pressure buffering cylinder according to the operation of the brake system. When the brake system is not actuated, the control valve is open to make the front fork communicate with the pressure buffering cylinder, thereby making the spring supporting force relatively smaller. When the brake system is actuated, the control valve is close to make the front fork not communicate with the pressure buffering cylinder, thereby making the spring supporting force relatively larger. Therefore, the spring supporting force is adjusted by the brake operation, that raises the riding comfort and safety.

A level control system for a vehicle, in particular a rail vehicle, includes at least one level control cylinder and one level control piston, the level control piston being movably guided in the level control cylinder in order to adjust the level of the rail vehicle, the level control piston having an outer piston sleeve and a piston main body at least partially accommodated in the piston sleeve, and the piston main body being slidable relative to the piston sleeve for wear readjustment and being lockable and/or fixable in at least two adjustment positions.

A suspension system for a vehicle and method for operating the same includes a shock absorber housing having a longitudinal axis, a spring disposed around the shock absorber housing and a retainer collar disposed around the shock absorber housing. An actuator coupled to the retainer housing moves at least a portion of the retainer housing to move the spring in a direction corresponding the longitudinal axis.

Adjustable spring support comprising a spring plate which is axially adjustable by an annular actuator, wherein the actuator is supplied with pressure medium via a pressure medium supply system, wherein the annular actuator has a pressure medium connection to the pressure medium supply system, and the housing of the actuator is connected directly to a housing of the pressure medium supply system.

A bearing spring/damper system of a vehicle wheel has a hydraulic vibration damper consisting of a damper cylinder and a damper piston guided therein, the piston rod of which hydraulic vibration damper is fastened to the vehicle body, whilst the damper cylinder is supported to a wheel guiding element. A pretension spring is clamped functionally between the damper piston and a pretension piston which can be displaced hydraulically in the longitudinal direction of the piston rod. The pretension piston is supported hydraulically with respect to the damper cylinder by a support chamber filled with the hydraulic medium of the vibration damper, and can be displaced by a conveying device, which conveys hydraulic medium into or out of the support chamber. The pretension spring is parallel-connected in every possible position of the pretension piston of a bearing spring ultimately clamped between the vehicle body and the wheel for force transmission.

A hydraulic flow adjuster includes a first hydraulic tank, a second hydraulic tank, and a piston actuator. A first piston operates within the first hydraulic tank and a second piston operates within the second hydraulic tank. The piston actuator adjusts a relative position of the first piston in the first hydraulic tank and a relative position of the second piston position in the second hydraulic tank, such that the relative position of the first piston in the first hydraulic tank is the same as the relative position of the second piston in the second hydraulic tank.

A suspension strut for a wheel suspension of a vehicle may have a vibration damper, a supporting spring that partially surrounds an outer tube of the vibration damper and is supported by a spring collar, and a lifting device for height adjustment of the vehicle. The lifting device may comprise a hollow piston and a cylinder that are arranged concentrically around the outer tube. The hollow piston may be guided axially between the outer tube and the cylinder and is connected to the spring collar to adjust a base point of the supporting spring. The hollow piston may comprise a stripping and sealing element that lies against the vibration damper.

Adjustable spring support includes a first spring plate and a second spring plate, wherein at least one of the spring plates is axially adjustable relative to the other spring plate by an actuator, wherein the actuator is supplied with pressure medium via a pump which is driven by a motor and which is connected to a supply receptacle, wherein the motor, the pump and the supply receptacle form a constructional unit, and the constructional unit provides a cylindrical surface of the actuator.

An actuator for level adjustment of a motor vehicle utilizes a ball screw and a locking unit provided for blocking the ball screw. The actuator has a spindle drive which can be actuated by an electric motor via a gear. The spindle may be fastened to a damper of the chassis of a motor vehicle, to a wheel carrier or to the body or a subframe of a motor vehicle. With the aid of a locking unit of the spindle drive, the rotation of the spindle nut can be optionally blocked or enabled. The locking unit includes a locking element which engages a locking contour attached to the end face of a rotatable element of the gear.