Features

• Load-independent level control at the four wheels
• Damper control according to the Skyhook algorithm
• Roll stabilization by controlled activation of the additional air volumes
• E-box control unit
• Application and diagnosis via CAN

Principle of operation

The semi-active air suspension is a fully functional suspension system which takes over the entire static and dynamic supportive elements by means of four air bellows located respectively at the wheels.

The level control for the ride-height control system is achieved with the help of air bellows: if the compressor supplies air to one of the air bellows, the vehicle height rises at the respective wheel. Conversely the height level decreases when air is released from one of the air bellows via the leveling discharge valve. The system is equipped with a central storage unit as compressed air resevoir. This increases the adjustment speed when the vehicle rises and allows for control even when the engine is at a standstill. Furthermore the air suspension system is combined with an automatic damper adjustment which works according to the Skyhook algorithm. Four control valves can be turned on or off per wheel for additional air volume, allowing for the semi-activity of the damper adjustment with simultaneous roll stabilization.

Furthermore the air suspension system is combined with an automatic damper adjustment which works according to the Skyhook algorithm.