A vehicle height adjustment system includes: a cylinder housing part having an inner space configured to receive working fluid; a piston part positioned in the cylinder housing part, the piston part configured to move linearly, in response to a working fluid, in a moving direction along the cylinder housing part; and a rotation suppressing bracket coupled to the cylinder housing part and connected to a side surface of the piston part, the rotation suppressing bracket configured to suppress rotational movement with respect to the moving direction of the piston part.

A method and device utilizing pressure and/or height measurements across an axle of a vehicle to detect when the vehicle turns and, when a turn is detected, a control action is taken to avoid pneumatic pressure loss by inhibiting active leveling via the height adjustable suspension.

An apparatus for adjusting a height of a vehicle including a vehicle height adjustment unit configured to adjust a height of the vehicle; a hydraulic pressure supply unit configured to supply a hydraulic pressure supplied to a caliper from a braking device for braking of the vehicle to the vehicle height adjustment unit; and a control unit configured to control a hydraulic pressure supplied to the vehicle height adjustment unit from the braking device, by controlling the hydraulic pressure supply unit depending on whether a predetermined vehicle height adjustment condition is satisfied.

A vehicle height adjustment system includes: a cylinder housing part having an inner space configured to receive working fluid; a piston part positioned in the cylinder housing part, the piston part configured to move linearly in response to the working fluid transferred to the cylinder housing; a damper rod part positioned in the piston part; a protrusion part protruding outward from the damper rod part; and a guide part formed in the piston part facing the protrusion part, wherein the protrusion part is inserted into the guide part.

A vehicle height adjuster includes an actuator provided to form vertical linear displacement between a leaf spring and a suspension arm, a power source connected to the actuator and configured to provide power to drive the actuator, a vehicle height sensor provided to detect a change in a height of the suspension arm relative to a vehicle body, and a controller connected to the vehicle height sensor and the power source and configured to receive a signal from the vehicle height sensor and to control the power source to drive the actuator.

A vehicle height adjustment device includes: vehicle height adjustment actuators provided to at least a pair of front wheels or a pair of rear wheels of a vehicle, and configured to adjust a vehicle height defined by a distance between the wheels and a vehicle body; an actuator control device configured to control the vehicle height adjustment actuators such that the vehicle height approximates to a target vehicle height; and a detection device configured to detect a physical quantity which varies as upward or downward movement of the vehicle body is restricted due to contact with an external contacted object. The actuator control device stops upward or downward movement of the vehicle body, and switches to movement in an opposite direction based on a detected value of the detection device, when the determination that the movement of the vehicle body is restricted is made by the detection device.

An air management system for a vehicle having a first pneumatic circuit and a second pneumatic circuit, in which the first and second pneumatic circuits are pneumatically connected in a neutral position via a cross-flow mechanism. The first pneumatic circuit is configured to independently adjust air pressure of a first side of the vehicle. The second pneumatic circuit is configured to independently adjust air pressure of a second side of the vehicle. The system is configured to establish pneumatic communication between the first and second pneumatic circuits when the air management system is not independently adjusting the adjust air pressure of the first side of the vehicle and the air pressure of the second side of the vehicle in the cross-flow mode.

End members are supportable along a damper housing and dimensioned for securement to flexible spring member. End members include a wall with a side wall portion including an inner side surface portion. First projections extend toward a first inner edge with a first shoulder surface portion faces a second end. Second projections extend inward beyond the inner side surface portion toward a second inner edge with a second shoulder surface portion facing a first end. Second projections are spaced axially from first projections such that a groove is formed inward of the inner side surface portion between first and second shoulder surface portions. End member assemblies including such an end member as well as gas spring and damper assemblies and suspension systems are also included.

A vehicle height adjuster includes an actuator provided to form vertical linear displacement between a leaf spring and a suspension arm, a power source connected to the actuator and configured to provide power to drive the actuator, a vehicle height sensor provided to detect a change in a height of the suspension arm relative to a vehicle body, and a controller connected to the vehicle height sensor and the power source and configured to receive a signal from the vehicle height sensor and to control the power source to drive the actuator.

A highly reliable and highly efficient air suspension system for a vehicle is provided by improving the trackability of stroke control with respect to pressure fluctuations applied to a linear compressor, suppressing stroke increase due to pressure drop, preventing piston collision, and increasing a flow rate by reducing dead volume. To realize this, the air suspension system includes an air suspension that supplies and discharges compressed air to adjust a length, a compressor body in which a piston reciprocates in a cylinder to compress air, a linear motor that reciprocates the piston, a tank that is connected to the air suspension or the compressor body and stores compressed air, a solenoid valve that opens and closes the air suspension or the tank, and an inverter that changes power supplied to the linear motor according to an open and closed state of the solenoid valve to perform position control of the piston.