Parking Brake System: Description and Operation
WM 4600IN Component arrangement - foot-operated parking brakeComponent arrangement
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.
A - Parking brake release. Location: lower dashboard trim panel.
B - Parking brake pedal. Location: left side of driver's footwell.
C - Parking brake cable. Location: under carpet in driver's footwell.
D - Deflector. Location: under center console.
E - Brake cable, rear. Location: Each fitted from the console/deflector to a rear wheel brake