The BMW Six-Cylinder-Diesel-Engine for Euro 4

Authors

Dr.-Ing. H. Kratochwill, Dipl.-Ing. W. Mattes, Ing. F. Steinparzer, BMW Motoren GmbH, Steyr

Year

2004

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 566

Summary

The new Euro 4 emissions level planned for introduction on 1.1.2006 demands a reduction of NOx and Particle emissions by 50 percent. BMW is beginning to successively adapt its volume fleet to meet this new emissions level. The following report describes the technical measures undertaken on the 3.0l six-cylinder engine for the introduction of Euro 4 in the 5 series. The main focus is on a clear reduction of pretreatment emissions through engine-internal measures and the implementation of a new particle filter system. The engine-internal measures include revised injection hydraulics, optimization of the combustion chamber and intake ports, and the development of an innovative, adaptive “compare and control” concept. A highlight of the Euro 4 package is the new particle filter. BMW uses a catalytic coated filter element in combination with an intelligent concept for continuous evaluation of condition and control of regeneration. As a result, a near total elimination of soot particles is possible without influencing other customer relevant characteristics. Even with the fulfillment of Euro 4, all the customer important characteristics such as fuel consumption, performance, and NVH remain at the expected highest standards.

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