Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 2, 2013
Patent Application Number
13275830
Date Filed
October 18, 2011
Patent Citations Received
Patent Primary Examiner
Patent abstract
An attenuator for the air inlet tract of an internal combustion engine comprises an unobstructed tube (4) having a surrounding enclosure (9) divided into a primary chamber (11) in fluid communication with the inlet tube, and a secondary chamber (12) in fluid communication with the primary chamber. Two secondary chambers (12, 13) may be provided. The arrangement can be tuned to attenuate a wide range of frequencies.
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