Dynamic Brake Control (DBC)

The DBC function is designed to provide an increase in braking pressure up to the ABS threshold during rapid (emergency) braking situations. The MK60 control unit monitors the inputs from the brake light switch and the brake pressure sensors on the master cylinder. The triggering criteria for activation of DBC is, how rapidly is the brake pressure increasing with an application of the brake pedal. The triggering conditions are:

• Brake light switch on.
• Brake pressure in the master cylinder above threshold.
• Brake pressure build-up speed above threshold.
• Vehicle road speed above 3mph (5kmh).
• Pressure sensor self test completed and sensors not faulted.
• Vehicle traveling forward.
• Not all of the wheels in ABS regulation range.

If the threshold for DBC triggering is achieved, the MK60 control unit will activate a pressure build-up intervention by activating the return pump. The pressure at all wheels is increased up to the ABS regulation point. This ensures that the maximum brake force is applied to the vehicle.

During DBC the rear axle is controlled with Select-Low logic and the front wheels are regulated individually. DBC will continue until:

• The driver releases the brake pedal.
• Brake pressure falls below threshold.
• Vehicle road speed below 3mph.

DBC will also be switched off if a fault occurs in with any of the necessary input sensors.

A fault in DBC will illuminate the "BRAKE" (ABL) lamp yellow to warn the driver, depending on the type of failure the DSC lamp may be illuminated as well.