The Brake System of the New 7 Series BMW with Electronic Brake and Wheel Slip Control

Compared with its predecessor the chassis of the new 7-series BMW features a lot of technical changes [1]. As part of the chassis of the new car, the brake system and the wheel slip control systems are characterized by some new design solutions [2].

Different designs were chosen to fulfil the requirements of the respective versions of the 7-series. New aluminium calipers are used (730i) as well as 2-piston sliding calipers for the top model 750i. The actuation is designed in accordance with the long-stroke-principle. The same vacuum-booster and tandem master cylinder is used for all variants.

The wheel slip control systems range from conventional ABS, Automatic Stability Control ASC to Dynamic Stability Control DSC. Firstly introduced in '92 in the 850Ci the second generation of DSC in the new 750i features Cornering Brake Control CBC as an additional ‘active’ function.

All models of the new 7-series are equipped with Hall effect wheel speed sensors with wheel bearing integrated toothed wheels.