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Development of an active exhaust silencer for internal combustion engines using feedback control
Technical Paper
1999-01-1844
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A silencer to attenuate engine exhaust noise using active control methods has been developed. The device consists of an electrically driven valve, combined with a buffer volume, which is connected to the exhaust outlet. Using the mean flow through the valve and the pressure fluctuations in the volume, the valve regulates the flow in such a way that only the mean flow passes through the exhaust outlet. The fluctuations of the flow are temporally buffered in the volume.
To carry out optimization and validation experiments, a cold engine simulator has been developed. This device generates realistic exhaust noise as well as the matching gas flow using compressed air. The simulator allows quick and reliable acoustic and fluid dynamic experiments on exhaust prototypes.
The silencer is developed using electrical equivalent circuits, wherein at first instance a feedforward control is applied. The silencer has been built and the transfer function between electrical motor current of the valve and resulting acoustic pressure is measured. Based on these measurements, the feedback controller is developed and tested.
The active silencer is capable to reduce the exhaust noise with 13 dBA using feedforward and 16 dBA using feedback control, with a back pressure of 10 kPa to the engine.
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Authors
- René Boonen - K.U.Leuven, Faculty of Applied Sciences, Department of Mechanical Engineering, division PMA, Celestijnenlaan 300B, B-3001 Heverlee, Belgium e-mail: rene.boonen@mech.kuleuven.ac.be
- Paul Sas - K.U.Leuven, Faculty of Applied Sciences, Department of Mechanical Engineering, division PMA, Celestijnenlaan 300B, B-3001 Heverlee, Belgium e-mail: rene.boonen@mech.kuleuven.ac.be
Topic
Citation
Boonen, R. and Sas, P., "Development of an active exhaust silencer for internal combustion engines using feedback control," SAE Technical Paper 1999-01-1844, 1999, https://doi.org/10.4271/1999-01-1844.Also In
References
- Beranek Leo L. Acoustics Mc Graw-Hill 1954
- Davis, D.D. Jr. Stokes G.M. Moore D. Stevens, G.L. Jr. Theoretical and experimental investigation of mufflers with comments on engine exhaust design Langley Aeronautical Laboratory 1954
- Heckl M. Müller H. A. Taschenbuch der Technische Akustiek Springer Verlag 1975
- Baxa D.E. Noise control in internal combustion engines John Wiley & Sons 1982
- Prasard M. G. A four load method for evaluation of acoustical source impedance in a duct Journal of Sound and Vibration 114 2 347 356 1987
- Kergomard J. Garcia A. Tagui G. Dalmont J. P. Analysis of higher order mode effects in an expansion chamber using modal theory and equivalent electrical circuits Journal of Sound and Vibration 12 3 457 475 1989
- Snyder S. D. Hansen C. H. Active noise control in ducts: some physical insights Journal Acoust. Soc. Am. 86 1 184 1989
- Hutchins S. M. Cherqui J. Active Exhaust Noise Cancellation ISATA 91 conference May 1991
- Hall H. R. Brendt F. W. Bernhard R. J. Active control of radiated sound from ducts Transactions of the ASME 114 July 1992
- Hardouin L. Micheau P. Tartarin J. Laumonier L. An anti-pulsatory device used as an active noise control system in a duct acta acoustica 1 189 198 1993
- Bodén Hans Åbom Mats Modeling of fluid machines as sources of sound in duct and pipe systems acta acoustica 3 594 560 1995
- Selamet A. Dickey N.S. A time domain computational simulation of acoustic silencers Journal of vibration and acoustics 117 323 331 July 1995
- Arnold Everett Frazer Warner Development of a prototype active muffler for the Detroit diesel 6V-92 TA industrial engine Detroit Diesel Corporation
- Blair G. P. Spechko J. A. Sound pressure levels generated by internal combustion engines exhaust systems SAE 720155
- Tichy J. Applications for active control of sound and vibration Noise News International 73 86 June 1996
- Boonen R. Sas P. Determination of acoustic impedance of an IC-engine with validation on a cold engine simulator for exhaust noise Proceedings of the ISMA21 conference Leuven 1 389 400 1996
- Boonen R. Sas P. Design of an active noise cancellation device for internal combustion engines Proceedings of the ACTIVE97 conference Budapest 499 512 1997
- Blondel L.A. Elliot S.J. Subsonic compressed air sources for active noise control Proceedings of the ACTIVE97 conference Budapest 619 634 1997
- Obier Torsten Pfeifer Günther An alternative source for high sound pressures and low frequencies Proceedings of the ACTIVE97 conference Budapest 689 698 1997
- Hansen Colin H. Snyder Scott D. Active Control of Noise and Vibration E&FN SPON 1997
- Boonen R. Sas P. Development of an active exhaust silencer for internal combustion engines Proceedings of the ISMA23 conference Leuven 3 1245 1252 1998