Sound Engineering for Diesel Engines

Authors

Dipl.-Ing. A. Enderich, Dipl.-Ing. R. Fischer, MAHLE Filtersysteme GmbH, Stuttgart

Year

2006

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 622

Summary

The strong acceptance for vehicles powered by turbocharged diesel engines encourages several manufacturers to think about sportive diesel concepts. The approach of suppressing unpleasant noise by the application of distinctive insulation steps is not adequate to satisfy sportive needs. The acoustics cannot follow the engine’s performance. This report documents, that it is possible to give dieselpowered vehicles a sportive sound characteristic by using an advanced MAHLE MotorSoundSystem with a pressureresistant membrane and an integrated load controlled flap. With this the specific acoustic disadvantages of the diesel engine, like the "diesel knock" or a rough engine running can be masked. However, by the application of a MotorSoundSystem you must not negate the original character of the diesel engine concept, but accentuate its strong torque characteristic in the middle engine speed range.

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