Chassis

Porsche Torque Vectoring (PTV)

For the first time in a Porsche sportscar, the new 911 Turbo is optionally available with a system with variable torque distribution on the rear axle.

PTV contributes to an improvement in agility and driving stability with the following elements:

- Mechanical rear-axle differential lock
- Braking interventions based on driving dynamics for variable drive torque distribution on the rear axle

Porsche Torque Vectoring (PTV) is available in vehicles with manual transmission and Porsche Doppelkupplung (PDK).

Function

The mechanical rear-axle differential lock improves traction if the wheels start to spin, reduces load change reactions during fast cornering and improves driving stability at higher speeds. In addition, PTV improves steering behaviour and steering precision by selectively braking the rear right or rear left wheel. PTV also offers increased lateral acceleration potential and higher cornering speeds by using braking interventions with steering support on the rear axle.







The advantages of PTV can best be explained using the example of steering into a bend. When driving dynamically into a corner, the front wheels are normally turned by the steering wheel and the vehicle may steer into the bend with a slight delay and slight understeer in the limit range, taking into account the elasticity of elements such as suspension mounts and tyres. With PTV, the inside rear wheel is braked slightly as the steering is turned when driving dynamically. This gives the outside rear wheel a higher drive power. An additional force (yawing moment) is achieved in the steering direction by the difference in force created between the inside and outside wheels. The result is direct and dynamic steering into the bend.