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The Brake System of the New 7 Series BMW with Electronic Brake and Wheel Slip Control
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English
Abstract
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.
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Authors
Citation
Leffler, H., "The Brake System of the New 7 Series BMW with Electronic Brake and Wheel Slip Control," SAE Technical Paper 950792, 1995, https://doi.org/10.4271/950792.Also In
References
- Matschinsky, W. Binkowski, B. Isenberg, F. Meyer, R. Komfortable Sicherheit - Das Fahrwerk der neuen 7er-Baureihe von BMW. ATZ 96 1994 11
- Leffler, H. Krusche, H. Böhm, J. Kühberger, J. Meisenzahl, J. Bremsanlage und Schlupf-Regelsysteme der neuen 7er-Reihe von BMW. ATZ 97 1995 1
- Leffler, H. Consideration of Lateral and Longitudinal Vehicle Stability by Function Enhanced Brake and Stability Control System SAE Technical Paper Series 940832 1994
- Riess, W. Hohm, D. Wagner, D. Hall Drehzahlsensoren für ABS und Motorsteuerungen, Haus der Technik 1993
- Leffler, H. Dynamical Stability Control DSC - A New BMW Control System to Improve Vehicle Stability and Handling Proceedings of the Institution of Mechanical Engineers, IMechE 1993-9, Vehicle Ride and Handling
- Krusche, H. Dynamische Stabilitäts Control DSC. Darstellung von Theorie, Funktion und Projektstand BMW Internal Report February 1991
- Leffler, H. Entwicklungsstand der ABS-integrierten BMW Schlupfregelsysteme ASC und DSC. ATZ 96 1994 2