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Cayenne

2010-2013 Panamera – Manual

2010-2013 Panamera – Manual

Page: 177

Driver Responsibility

Despite the advantages of transmission and chassis control systems, it is still the driver's responsibility to adapt his driving style and maneuvers in line with road and weather conditions, as well as the traffic situation.

The increased safety that is provided should not induce you to take greater risks with your safety. The limits set by the physics of driving cannot be overcome.

These systems cannot reduce the risk of accidents due to inappropriate speed.

  • Adapt your driving style, maneuvers and speed to the road and weather conditions, as well as the traffic situation.

Porsche Traction Management (PTM)
Porsche Traction Management is an active allwheel control system designed to influence longitudinal and lateral dynamics. It is closely linked with the Porsche Stability Management (PSM) system.

The permanently driven rear axle enhances the vehicle's sporty features. Drive power is distributed fully variably to the front axle, depending on the driving situation.

In conjunction with PSM, the PTM system ensures perfect distribution of power among all four wheels in every driving situation. This improves traction and driving stability and ensures the same high level of agility and dynamic response.

Advantages of PTM
– Clearly perceptible improvement in traction, driving stability and steering ability of the vehicle.
– Vehicle is more manageable when driven at its performance limits.
– Improved straight-ahead tracking and greater stability.
– More sporty vehicle setup while making full use of all the advantages of four-wheel drive.
– ASR and ABD further enhance traction for all wheels.

For information on ASR and ABD:

  • Please see the chapter "PORSCHE STABILITY MANAGEMENT (PSM)" on page 177.

Porsche Stability Management (PSM)
PSM is an active control system for stabilisation of the vehicle during extreme driving manoeuvres. It operates together with the Porsche Traction Management (PTM) system provided the vehicle is fitted with the relevant equipment.

PSM makes use of both the automatic brake differential (ABD) and anti-slip control (ASR) systems, as well as the known functions of the anti-lock brake system (ABS) and engine drag torque control system (MSR).

Advantages of PSM
– Best possible traction and lane-holding ability in all driving situations – even on road surfaces with varying friction.
– The system compensates for undesired vehicle reactions (Ferraria effect) when the driver releases the accelerator
pedal or brakes on bends. This compensation functions up to the maximum lateral acceleration.
– PSM actively stabilises the vehicle if necessary during dynamic driving manoeuvres (e.g. rapid steering movements, during
lane changes, or on alternating bends).
– Improved braking stability on bends and on different or varying road surfaces.
– Improved brake function and shorter stopping distance in the event of emergency braking.

Readiness for operation
PSM is switched on automatically every time you start the engine.

Function
Sensors at the wheels, brakes, steering system and engine continuously measure:
– Speed
– Direction of travel (steering angle)
– Lateral acceleration
– Axial acceleration
– Rate of turn about the vertical axis

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