Abstract: An air suspension system for a motor vehicle and a method of operating thereof includes an air suspension device for adjusting a ride-height position of the motor vehicle by the feeding and removal of compressed air into a plurality of air springs. The system also includes a dryer supplied via a compressed-air supply unit which has a compressor driven by an electric motor. A control unit for performing a ride-height control function has instruction for: raising the ride-height position to a first ride-height position; subsequently lowering the ride-height position to a second ride-height position; checking a first condition whether a determined air quantity ratio is less than a first predetermined air quantity limit value; checking a second condition whether a saturation level of the dryer is greater than a saturation limit value, and activating the ride-height control function when either the first or the second condition is satisfied.

Abstract: A method and system for operating pneumatic suspension system including a plurality of air springs changing a ride height of the motor vehicle by the supply and extraction of compressed air, at least two first axle air springs, and two second axle air springs, an air spring valve, a first and further changeover valve are arranged in a compressed air path, an additional accumulator valve, the second compressed air path is connected to the first compressed air path via a third compressed air path in which a connecting valve is provided, for simultaneous adjustment of the ride height of the vehicle on both axles, the air spring valves, and the first and the further changeover valves and the additional accumulator valve are opened at the same time while the connecting valve remains closed.

Abstract: An air suspension system for a motor vehicle and a method of operating thereof includes an air suspension device for adjusting a ride-height position of the motor vehicle by the feeding and removal of compressed air into a plurality of air springs. The system also includes a dryer supplied via a compressed-air supply unit which has a compressor driven by an electric motor. A control unit for performing a ride-height control function has instruction for: raising the ride-height position to a first ride-height position; subsequently lowering the ride-height position to a second ride-height position; checking a first condition whether a determined air quantity ratio is less than a first predetermined air quantity limit value; checking a second condition whether a saturation level of the dryer is greater than a saturation limit value, and activating the ride-height control function when either the first or the second condition is satisfied.

Abstract: A method and system for operating pneumatic suspension system including a plurality of air springs changing a ride height of the motor vehicle by the supply and extraction of compressed air, at least two first axle air springs, and two second axle air springs, an air spring valve, a first and further changeover valve are arranged in a compressed air path, an additional accumulator valve, the second compressed air path is connected to the first compressed air path via a third compressed air path in which a connecting valve is provided, for simultaneous adjustment of the ride height of the vehicle on both axles, the air spring valves, and the first and the further changeover valves and the additional accumulator valve are opened at the same time while the connecting valve remains closed.