Brake Temperature Model (BTM)

The BTM function determines by way of a calculation model integrated on a software basis in the DSC control unit the temperatures of all four brake discs as a function of the input variables:

• Wheel speed
• Individual wheel brake pressure
• Ambient temperature

If the critical brake-disc temperature is exceeded (t > 600 °C) at a wheel, DSC functions are limited as a function of the prevailing driving conditions:

• Locking interventions are reduced to zero for each individual wheel.
• Symmetrical braking torques on the corresponding axle are prohibited.
• The engine torque is limited temporarily via an algorithm for driving performance reduction.

The restrictions are lifted again when the temperature drops below a further threshold (t < 500 °C).