Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1986-03-07
1989-03-07
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181265, 181272, 181275, 181281, 181282, 181296, F01N 108
Patent
active
048098124
ABSTRACT:
A compact, sound-attenuating muffler for an internal combustion engine is disclosed in which the muffler includes a stream dividing partition positioned proximate the inlet of the muffler to divide the incoming exhaust gases into two streams of substantially equal volume. The stream dividing partition directs the streams laterally of the inlet in directions diverging from each other, and the muffler sound-attenuating assembly further includes corridor defining partitions receiving the streams from the stream dividing partition and maintaining the streams in corridors as coherent substantially eddy-free streams. The corridor defining partitions further direct the streams laterally to converge towards each other for discharge of the coherent streams against each other from opposed directions in a common volume inside the muffler casing. Further sound attenuation is accomplished by a common channel receiving the streams after they are intersected or discharged against each other. A method of attenuating the sound entrained in the exhaust gases of an internal combustion engine is also disclosed. The method includes dividing the gases into two streams, diverging the gases, converging the gases while maintaining them in substantially eddy-free coherent streams, and discharging the gases against each other to produce like-frequency sound attenuation without substantial back pressure increase.
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Flowmaster, Inc.
Fuller Benjamin R.
LandOfFree
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