Porsche Traction Management (PTM) is an active all-wheel drive system with an electronically variable, map-controlled multi-plate clutch, automatic brake differential (ABD) and anti-slip regulation (ASR).
Torque is distributed between the front and rear axles by means of the electronically variable multi-plate clutch. For the toughest off-road terrain, the differential can be locked using the PTM control on the centre console. With the aid of on-board sensors, the status of the car is continuously monitored and the front/rear split is adjusted to match changing driving conditions. The sensors are used to measure a range of values, including the rotational speed of all four wheels, the lateral and longitudinal acceleration of the car, and the current steering angle.
If, for example, the rear wheels threaten to lose traction under acceleration, a greater proportion of drive torque is automatically transmitted to the front axle by a more positive engagement of the multi-plate clutch. In addition, ASR minimises wheel spin. During cornering, the required level of engine torque is distributed to the front wheels to ensure excellent lateral stability.
In conjunction with advanced Porsche Stability Management (PSM), PTM ensures the perfect distribution of drive torque for optimum traction in all road scenarios, whether on long straights, through tight corners or on surfaces with different friction coefficients. If one of the wheels is about to lose traction, PTM uses the ABD function to apply the corresponding brake. As a result, more drive is automatically transferred to the opposite wheel. If both wheels on one axle are in danger of slipping, ASR immediately intervenes and modifies engine output to maintain drive. As well as enhancing traction and active safety, Porsche Traction Management (PTM) offers exceptional handling and driving dynamics.
Standard on the Cayenne, Cayenne S, Cayenne GTS and Cayenne Turbo.