PASM – Porsche Active Suspension Management
An active suspension that directly affects the position (stability) of a vehicle developed by Porsche.
PASM is an electronic damping control system. On the new Boxster models, the suspension has been improved to take into account the increased engine power. Active and constant PASM adjusts the damping force of each wheel according to road conditions and driving style. In addition, the suspension is lowered by 10 mm.
The driver can choose between two different modes:
- Normal: a combination of performance and comfort;
- Sports: the installation is much more solid.
The PASM control unit evaluates the driving conditions and modifies the damping force on each wheel in accordance with the selected mode. Sensors monitor the movement of the vehicle, for example, during hard acceleration and braking or on uneven roads. The ECU adjusts the dampers to the optimum stiffness in accordance with the selected mode to reduce roll and pitch, and even more to increase traction of each individual wheel to the road.
In Sport mode, the shock absorber is tuned for a stiffer suspension. On uneven roads, PASM immediately switches to a softer setting in the Sport setting, thereby improving traction. As road conditions improve, PASM automatically reverts to the original, hardest rating.
If "Normal" mode is selected and the driving style becomes more "decisive", PASM automatically switches to a more extreme mode within the "Normal" configuration range. Damping is enhanced, driving stability and safety are increased.
