PSM - Porsche Stability Control

It is an automatic adjustment system developed by Porsche to stabilize the vehicle under extreme dynamic driving conditions. Sensors continuously measure the direction of travel, vehicle speed, yaw rate and lateral acceleration. Porsche uses these values ​​to calculate the actual direction of travel. If this deviates from the optimal trajectory, PSM intervenes in targeted actions, braking individual wheels to stabilize the vehicle.

In the event of acceleration on a road surface with a different coefficient of friction, PSM improves traction thanks to the built-in ABD (Automatic Brake Differential) and ASR (Anti-Skid Device) functions. For greater agility. In Sport mode with the optional Sport Chrono Packages, the PSM has an adjustment that provides additional maneuvering room at speeds up to 70 km / h. Integrated ABS can further shorten stopping distances.

For highly dynamic driving, PSM can be deactivated. For your safety, it is reactivated as soon as at least one front wheel (in sport mode both front wheels) is within the ABS setting range. The ABD function remains permanently active.

The redesigned PSM has two new additional functions: brake pre-charging and emergency braking assistant. If the driver releases the accelerator pedal very abruptly, the PSM prepares the braking system more quickly: when the braking system is preloaded, the brake pads are slightly pressed against the brake discs. In this way, the maximum braking power can be reached faster. In the event of emergency braking, the Brake Assist intervenes to ensure the required force for maximum deceleration.

Source: Porsche.com