Exhaust muffler device for combustion engine
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United States of America Patent
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Jul 4, 2017
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N/A
app pub date -
Sep 15, 2015
filing date -
Sep 24, 2014
priority date (Note) -
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Abstract
An exhaust muffler device for an combustion engine includes: a first expansion chamber into which exhaust gas from a combustion engine flows; a second expansion chamber disposed downstream of the first expansion chamber; a resonance chamber that is disposed adjacent to the first expansion chamber and communicates with an exhaust passage; a discharge passage through which the exhaust gas that flows into the resonance chamber is discharged to the outside; and an exhaust valve disposed in a second partition wall between the first expansion chamber and the resonance chamber. The exhaust valve opens when pressure in the first expansion chamber attains a value greater than a predetermined value.
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