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Sound damping device for heavy vehicle e.g. truck, has guide units dividing space in curved portion of pipe, where holes are so narrow that sound passes through holes between adjacent flow channels but only with certain resistance
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0002-3826-3055
Scania .
2006 (English)Patent (Other (popular science, discussion, etc.))
Resource type
Text
Abstract [en]

NOVELTY - The device has guide units (11a, 11b, 11c) that are arranged inside a pipe. The guide units divide an internal space in a curved portion (7`) of the pipe into two flow channels. The guide units comprise a set of holes running through, where the holes so narrow that sound passes through the holes between mutually adjacent flow channels but only with a certain resistance. The curved portion have curvature of such a magnitude that sound cannot pass through the flow channels without encountering a wall surface of the guide units.USE - Used for damping sound in a pipe (claimed) that supplies a gaseous medium e.g. compressed air, to a supercharged combustion engine e.g. diesel engine, that is utilized for powering a heavy vehicle e.g. truck.ADVANTAGE - The guide units divide the space in the curved portion of the pipe, where holes are so narrow that sound passes through the holes between the adjacent flow channels but only with certain resistance, thus providing a very effective damping of the sound from a turbo unit in relatively simple manner without disturbing the pattern of air flow and without auxiliary unit that would require more space.DESCRIPTION OF DRAWING(S) - The drawing shows a depiction of a sound damping device.Curved pipe portion (7`)Sound damping device (10)Guide units (11a, 11b, 11c)Flow channels (12a, 12b, 12c, 12d)

Place, publisher, year, edition, pages
2006.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-180753OAI: oai:DiVA.org:kth-180753DiVA: diva2:896894
Patent
WO2006115461-A1 (2006-11-02)
Note

QC 20170118

Available from: 2016-01-22 Created: 2016-01-22 Last updated: 2017-02-22Bibliographically approved

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