Quote:
Originally Posted by TheSt|G
Any chance you could post up the source material on that? I'd love to read more into it.  |
BEST I CAN DO...SOURCE IS AN ANCIENT CHINEESE SECRET
Fading Brake Support (FBS):
If the driver is unable to make use himself of full vehicle deceleration on account of poor
brake-pad friction coefficients, e.g. due to high thermal loads, he is supported by the FBS
function. The requirement is a high braking pressure with a simultaneously low vehicle
deceleration and high brake-disc temperature.
The FBS function compensates for the brake-force loss through an increase in temperature.
The diminishing braking effect when brakes are hot requires the driver to press the brake
pedal more firmly. This increase in pressure is now assumed by an activation of the
hydraulic pump.
The brake-disc temperature is not measured but rather calculated by means of the following
input variables:
• Wheel speed
• Individual wheel brake pressure
• Ambient temperature
• Number of brake applications over time
AND ALSO
Driving-Performance Reduction (FLR)
The FLR function protects the brakes against overloading in the event of misuse.
If a temperature in excess of 600 ºC is determined, the engine power is reduced to a
defined value (dependent on the type of vehicle) in order to limit the vehicle's accelerating
performance. When the temperature drops below a lower limit (typically 500 ºC), the
reduced engine torque is increased as a function of time on a ramp basis to the maximum
torque again. Driving-performance reduction should only be active from a speed of 60
km/h.
This reduction of the engine torque is stored as a fault (driving performance reduction
active). Should the customer find fault with the lack of engine power, this can be established
by the garage/workshop and explained as brake overloading.
AND ALSO
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 ºC) 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 ºC).