Multi-chamber muffler with selective sound absorbent material placement
First Claim
Patent Images
1. An attenuating apparatus comprising:
- a shell;
first and second spaced apart walls coupled to said shell so as to define a first chamber;
a sound absorbing material disposed in said first chamber;
an imperforate conduit supported by said first and second walls and extending through said first chamber;
a third wall coupled to said shell in spaced relation to said first wall so as to define a second chamber, said imperforate conduit communicating with said second chamber;
a fourth wall coupled to said shell in spaced relation to said second wall so as to define a third chamber, said imperforate conduit communicating with said third chamber;
a fifth wall coupled to said shell in spaced relation to said fourth wall so as to define a fourth chamber, said forth chamber communicating with said third chamber, anda perforated conduit supported by said first and second walls and extending through said first chamber.
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Abstract
The present invention provides an acoustic muffler for attenuating sound waves of the exhaust gas of an internal combustion engine including a shell, a plurality of walls closing both ends of the shell and dividing an interior of the shell into a plurality of chambers. The plurality of chambers include a first chamber having a sound absorbing material disposed therein. An imperforate pipe extends between the walls of the first chamber. Preferably, the plurality of chambers also include a second and a third chamber communicating with the imperforate pipe. Furthermore, a fourth chamber communicates with the second chamber.
88 Citations
13 Claims
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1. An attenuating apparatus comprising:
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a shell; first and second spaced apart walls coupled to said shell so as to define a first chamber; a sound absorbing material disposed in said first chamber; an imperforate conduit supported by said first and second walls and extending through said first chamber; a third wall coupled to said shell in spaced relation to said first wall so as to define a second chamber, said imperforate conduit communicating with said second chamber; a fourth wall coupled to said shell in spaced relation to said second wall so as to define a third chamber, said imperforate conduit communicating with said third chamber; a fifth wall coupled to said shell in spaced relation to said fourth wall so as to define a fourth chamber, said forth chamber communicating with said third chamber, and a perforated conduit supported by said first and second walls and extending through said first chamber. - View Dependent Claims (2, 3, 4)
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5. An acoustic muffler for attenuating sound waves comprising:
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a shell; a plurality of walls coupled to said shell, said plurality of walls closing both ends of said shell and dividing an interior of said shell into a plurality of chambers; said plurality of chambers including an attenuating chamber having a sound absorbing material disposed therein, an expansion chamber adjacent said attenuating chamber, a first tuning chamber adjacent said attenuating chamber on an opposite side as said expansion chamber, and a second tuning chamber adjacent said expansion chamber and communicating therewith; an imperforate pipe supported by a pair of said plurality of defining said attenuating chamber and extending therethrough, said imperforate pipe communicating with said expansion chamber and said first tuning chamber. - View Dependent Claims (6)
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7. An acoustic muffler for attenuating sound waves from exhaust gases of an internal combustion engine comprising:
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a shell; a front and a rear end plate coupled to said shell and closing both ends of said shell; at least three partition walls coupled to said shell interior of said front and rear end plates, said three partition walls dividing an inside space of said shell into a plurality of chambers including and attenuating chamber, a first helmholtz tuning chamber adjacent said attenuating chamber, an expansion chamber adjacent said attenuating chamber on an opposite side as said first tuning chamber and a second helmholtz tuning chamber adjacent said expansion chamber; an imperforate pipe supported by a pair of said at least three partition walls defining said attenuating chamber, said imperforate pipe communicating with said expansion chamber and said first tuning chamber; and a sound absorbing material disposed in said attenuating chamber. - View Dependent Claims (8, 9)
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10. An acoustic muffler for attenuating sound waves from exhaust gases of an internal combustion engine comprising:
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a shell; front and rear end plates coupled to said shell and closing both ends of said shell; at least three partition walls coupled to said shell interior of said front and rear end plates, said three partition walls dividing an inner volume of said shell into a plurality of chambers including an attenuating chamber and pair of helmholtz tuning chambers oppositely disposed on either side of said attenuating chamber; and a sound absorbing material disposed in said attenuating chamber. - View Dependent Claims (11, 12, 13)
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Specification