Parking Brake System: Description and Operation

Component arrangement - foot-operated parking brake
Information

A foot-operated parking brake is used in the Porsche Cayenne.
Special demands for a sporty, multi-purpose vehicle have been taken into account when designing the foot-operated parking brake. To achieve the required capabilities, it was designed as a foot-activated parking brake with an intermediate transmission ratio. The Cayenne can be parked reliably with a full load on gradients of 55%.
A cable is routed from the foot-operated lever to a deflection lever under the center console which transmits traction to a turnbuckle with a transmission ration of 3.1. Two cables are routed from the turnbuckle to the parking brakes on the rear axle.
The foot-operated parking brake is designed as a duo-servo drum brake and is integrated into the rear brake discs.