Tube and chamber construction for an exhaust muffler
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United States of America Patent
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Jul 26, 1988
Grant Date -
N/A
app pub date -
Jun 11, 1987
filing date -
Jun 11, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A muffler is provided including a pair of internal plates formed to define an array of tubes. At least one external 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 controlled 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.
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