Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1994-06-06
1995-09-12
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181258, 181276, F01N 708
Patent
active
054498660
ABSTRACT:
The invention relates to a sound-damping arrangement in a passageway system or pipe system for flowing gases, in particular in an exhaust system for internal combustion engines. The arrangement comprising at least one pipe which communicates with at least two chambers or openings, for example in a form of a muffler and/or a passageway/pipe-outlet, in such a manner that multiples of standing waves can arise in the pipe between both the chambers or openings. At least one tube is arranged in the pipe, with one end of the tube serving as in inlet while the other end of the tube is totally or partially closed. The inlet of the tube is arranged in, or in the vicinity of, one of the maximum sound-pressure regions of the pipe so as to dampen at least one maximum sound pressure.
REFERENCES:
patent: 3117650 (1964-01-01), Ludlow et al.
patent: 3119459 (1964-01-01), Ludlow et al.
patent: 3145338 (1964-08-01), Downs
patent: 3396812 (1968-08-01), Wilcox et al.
patent: 3429397 (1969-02-01), Case
patent: 3752260 (1973-08-01), Heath
patent: 4228868 (1980-10-01), Raczuk
patent: 4537278 (1985-08-01), Okada et al.
patent: 4872528 (1989-10-01), Goplen et al.
patent: 4936413 (1990-06-01), Lee
patent: 4993512 (1991-02-01), Lescher
Abstract: SU 1437-517-A, Kochetov O. S., published Nov. 15, 1988.
AB Volvo
Dang Khanh
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