Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1983-11-03
1986-03-11
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181275, 181281, F01N 108
Patent
active
045749140
ABSTRACT:
A compact, sound-attenuating muffler for a high-performance internal combustion engine is disclosed in which the muffler casing has an elongated transverse cross-section with a height dimension of only slightly larger than the height dimension of the inlet exhaust pipe and a width dimension in the range of about 2 to 41/2 times the height dimension. The muffler includes a divergently tapering planar first partition which causes gases to be expanded only in a horizontal plane toward the side walls of the muffler and further includes a second partition formed to contract or converge the gases in a horizontal plane toward a central opening. The first partition has a cup-shaped back surface so that contraction of the gases around the back side of the first partition is highly effective in attenuating sound, and both partitions are sloped in a direction toward the outlet from the muffler so as to minimize the generation of back pressure, which is not substantially greater than the back pressure in a straight pipe.
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Chickering Robert B.
Flowmaster, Inc.
Fuller Benjamin R.
Grunewald Glen R.
Warren Manfred M.
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