Corner Braking Control (CBC)

CORNER BRAKING CONTROL (CBC)

Corner Braking Control (CBC) was an additional feature first added to the ASC/5 system of the E39 at introduction. CBC improves stability control while braking through curves.

As the vehicle enters a curve, the weight of the car shifts to the outside of the curve. With non CBC equipped vehicles if the driver brakes while driving through a curve an equal hydraulic force is applied to each wheel. Though the pressure is equal, the braking effort is unequal at the tire footprint due to the increased weight of the vehicle on the outside curve.

With a CBC equipped system, the feature regulates the apply pressure to the wheels based on the turning angle (curve recognition). When the driver brakes in the same situation, an unequal hydraulic pressure is applied to each side of the vehicle. Though the apply pressure is unequal, the dynamic of the vehicle's weigh transfer compensates for the unequal apply pressure, as a result braking effort is equal at the tire footprint.

The ASC control module monitors the speed signals from all four wheels to determine when this regulation is required.

This is a feature found on vehicles equipped with the Dynamic Stability Control System (DSC), however this ASC/5 system does not incorporate full DSC control.