Acoustics of New Gasoline Engine Gas Exchange and Combustion Process Concepts

Authors

Dr.-Ing. N. Alt, Dipl.-Ing. O. Lang, Dr.-Ing. S. Heuer, FEV Motorentechnik GmbH, Aachen

Year

2004

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 566

Summary

At present, the development of new gasoline engine technologies is making rapid progress. Some of these new technologies such as direct fuel injection, turbo charging and fully variable mechanical valve trains are already being applied in series production. Other new concepts such as the combination of the aforementioned technologies, or the use of variable compression ratio, high boost pressure or electrically activated valves are just under development. The new technologies aim at reducing fuel consumption while complying with the legal limits on noise and pollution. In this paper, the influence of various new gasoline engine concepts on noise and vibration behaviour is evaluated based on the predicted vehicle interior noise. The concepts are compared regarding their influence on mechanical excitation, combustion noise and orifice noise. Specific noise reduction measures for each concept are also discussed.

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