Air Suspension

Air Suspension







All air-spring struts on the front and rear axles are weight-optimized -- the new design for connection to the chassis means that it was possible to omit the mounting saddle on the front axle. On the rear axle, axle mounting parts were integrated rigidly in the body (integrated wishbone) in order to improve torsional rigidity. This contributes to improved handling of the new Cayenne models.







The new air suspension is also designed as a closed system, where the air is stored temporarily in a pressure accumulator when the height level is changed. Intermediate storage of the air saves energy thanks to the use of a compressor that has been optimized for the new demands. In addition, changes in the height setting are performed more quickly after manual or automatic selection. The new air suspension system with PASM features new software programming to create a wider adjustment range for the three PASM modes Comfort, Normal and Sport.

In all Cayenne models, the driver can activate the different manually selectable levels by means of the separate rocker switch on the centre console. This makes it possible to further enhance the off-road suitability of the Cayenne by setting a greater fording depth as well as larger approach/departure angles.







Component overview







The Cayenne features a closed air suspension system with a compressor, solenoid block with integrated pressure sensor and a pressure accumulator. To raise the vehicle, air is pumped into the spring units by the electric compressor. When lowering the vehicle, the excess air is not released to the outside, but is fed back into the 5.2-liter pressure accumulator by the compressor. This system makes the Cayenne particularly energy-efficient and also ensures fast suspension control.

The adaptive air suspension system includes the following components:
- Closed air supply system for better energy utilization and faster level adjustment
- Electrically driven compressor with air drier, isolated from the interior
- Solenoid valves for controlling the air-spring volume
- Light-alloy pressure accumulator
- 2 fully load-bearing air springs with outer guide and integrated dampers on the front and rear axles
- 4 level sensors (spring travel sensors) for detecting body movements
- PASM and air control integrated in one control unit

Schematic diagram