Tube and chamber construction for an exhaust muffler

Details Tube and chamber construction for an exhaust muffler Tube and chamber construction for an exhaust muffler

F - Mech Eng,Light,Heat,Weapons

01

N

172/37

F01N 1/02 (2006.01) F01N 13/18 (2010.01) F01N 1/00 (2006.01) F01N 13/14 (2010.01)

Patent

CA 1274778

ABSTRACT A muffler is provided including a pair of internal plates formed to define an array of tubes. At least one exter- nal shell is formed to define at least one chamber which will surround and enclose a selected portion of the array of tubes. Selected portions of certain tubes will be formed to include perforations. Portions of certain tubes will further undergo cross-sectional changes to control the flow of exhaust gases through the muffler. Certain channels between adjacent chambers of the external shell will be disposed to extend substantially continuously from peripheral portions of the adjacent chambers formed in the external shell. In certain embodiments, a con- trolled communication is provided between a low frequency resonating chamber and an adjacent expansion chamber. In other embodiments, additional formed layers are provided to enhance either heat or noise insulation.

545816

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