Active Torque Biasing
| ITEM | DESCRIPTION |
|---|---|
| A | Accelerator pedal pressed - torque bias to outer wheel to reduce under steer |
| B | Accelerator pedal released - increased locking torque applied to both wheels to reduce over steer |
Torque biasing uses the Rear Drive Unit (RDU) and the vehicle brakes to constantly balance the distribution of engine torque between the 4 wheels. It results in improved grip and steering and a reduced level of understeer during cornering.
The system also uses the Anti-lock Brake System (ABS) control module, monitoring the vehicle speed 100 times per second. As the vehicle accelerates through a corner, the system uses yaw sensors to detect understeer. If understeer is detected, there is an increase in engine torque along with subtle levels of braking to correct the vehicle attitude. Transferring engine torque to the outside wheels which have more grip maintains traction and steering control.
The torque biasing is also active in off road conditions, with different settings according to the Terrain Response (TR) mode. It can be very effective in conditions such as sand, where it helps the vehicle turn in and avoid excessive understeer.