Control Module

Control Module: The parking brake control module (integral in the EMF) is linked to other control modules for communication by the PT-CAN and K-CAN Busses. Diagnostic communication is provide through the ZGM over the PT-CAN Bus.




When the parking brake push button is pressed with the engine running, a fixed brake pressure is built up by the DSC hydraulic unit and applied to the service brakes.

The force applied at the spindle is calculated in the parking brake control module. The control module first determines the current flow of the actuating motor accounting for the temperature of the motor coil (affecting resistance). Hall sensors are mounted on the motor to detect the speed and position. The actuating force is calculated by evaluating the speed reduction of the motor (speed is a function of torque).