New Redesigned Diesel Engines for the BMW 7 Series

Authors

Dipl.-Ing. W. Mattes, Dr.-Ing. P. Nefischer, Ing. F. Steinparzer, BMW Motoren GmbH, Steyr:

Year

2005

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 595

Summary

The trend to diesel engines with high performance and low consumption is continuing in the upper-range segment of passenger cars in Europe. To provide the customers in this class with the most recent available technology BMW fundamentally revised both engines of the 7 Series. Apart from improvement in efficiency and reduction of fuel consumption the con-version to exhaust stage EU4 and a significant weigth reduction of both engines was achieved. While the engine dimensions of the 6-cylinder engine remained essentially unchanged there was a considerable increase in the cubic capacity of the 8-cylinder engine. Beside a multiplicity of detailed measures to reduce weigth the emphasis of technical measures was placed on a conversion to an aluminium crank case, on the introduction of the third generation Common Rail Injection System with piezo technology and on the employment of catalytically coated particulate filters. These two profoundly revised engines secure the BMW 7 Series diesel models a competi-tive advantage in the upper-range segement.

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