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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, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet.ORCID-id: 0000-0002-3826-3055
Scania .
2006 (engelsk)Patent (Annet (populærvitenskap, debatt, mm))
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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)

sted, utgiver, år, opplag, sider
2006.
HSV kategori
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URN: urn:nbn:se:kth:diva-180753OAI: oai:DiVA.org:kth-180753DiVA, id: diva2:896894
Patent
WO2006115461-A1 (2006-11-02)
Merknad

QC 20170118

Tilgjengelig fra: 2016-01-22 Laget: 2016-01-22 Sist oppdatert: 2017-02-22bibliografisk kontrollert

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