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Braking system

Cayenne S
Porsche - Braking system

Braking system

Porsche brakes are renowned worldwide as the benchmark in performance and durability. Equipped with larger and more powerful braking systems, the Cayenne models continue this tradition by offering excellent deceleration – even when the car is fully laden with five adult occupants, a full complement of luggage and a braked trailer load of up to 3,500 kg (Cayenne with manual gearbox: 2,700 kg).

All Cayenne models have internally vented discs all round, ensuring consistent performance during heavy use. The front disc dimensions (diameter/thickness) are 350 mm/34 mm on the Cayenne and Cayenne Diesel, 360 mm/36 mm on the Cayenne S, Cayenne S Hybrid and the new Cayenne GTS, and 390 mm/38 mm on the Cayenne Turbo. All models have six-piston monobloc aluminium brake calipers at the front and four-piston equivalents at the rear.

The calipers are black on the Cayenne and Cayenne Diesel and silver on the Cayenne S and Cayenne S Hybrid. On the new Cayenne GTS and the Cayenne Turbo, they feature a striking red paint finish.

Braking is assisted by a tandem booster and large brake master cylinder. Further assistance is provided by PSM.

For greater safety, the brake pads are equipped with wear sensors, alerting the driver when new pads are required.

Electric parking brake

Manually activated and deactivated, the electric parking brake releases automatically as you drive off.

Automatic hold function

With the automatic hold function, you can pull away on the flat or a slope without ever rolling back. The system automatically detects when the vehicle has come to a halt on an uphill gradient. PSM then maintains the brake pressure at all four wheels for a brief period to prevent the vehicle from moving in the opposite direction.

Recuperation

The electronic engine management system on the Cayenne S Hybrid controls the braking process so that, when the brake pedal is actuated, as much expended energy as possible can be harnessed by the electric machine in generator mode and stored in the 288-volt nickel metal hydride (NiMH) battery. This is referred to as recuperation. To do this, the engine management system adjusts the generator current depending on the brake pedal position, recovers part of the kinetic energy and stores it in the battery. When the pressure on the brake pedal exceeds a certain threshold, the brakes are applied.