Overview
This document contains information on:
General
Function requirements
Function
General
The "Correct drive torque" function fulfills the following tasks in the case of dynamic cornering under load:
Avoid spinning the drive gear on the inside of the curve
Move the drive torque of the drive gear on the inside of the curve to the drive gear on the outside of the curve
Reduce steering angle during dynamic cornering
Increase lateral acceleration during cornering
Increase cornering speed
Function requirements
Cornering (steering angle present)
Accelerator operated
Lateral acceleration present
Function
During dynamic cornering, the wheel load of the drive gear on the inside of the curve decreases. As a result of the reduced wheel load, the drive gear can transfer less drive torque. The unburdened drive gear reaches the slip limit faster and begins to spin. The "Correct drive torque" function controls the targeted pressure buildup on the service break of the drive gear on the inside of the curve. This prevents the drive gear on the inside of the curve from spinning and moves the drive torque to the drive gear on the outside of the curve.
The wheel braking torque for the drive gear on the inside of the curve is calculated depending on the following factors:
Lateral acceleration
Drive torque
Steering angle
Accelerator pedal position
A higher total drive torque can be transferred by targeted brake application. A higher lateral acceleration and higher cornering speed are achieved.