Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1997-09-24
1998-11-03
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181249, 181251, 181255, F01N 708
Patent
active
058312234
ABSTRACT:
An exhaust muffler for a motor vehicle includes a louver tube having an intake end and an exhaust end. An outer tube, consisting of a frustoconical portion and a cylindrical portion, is concentrically arranged around the louver tube. A plurality of louvers and associated louver holes in the louver tube scoop a portion of gasses from the louver tube into the outer tube. An end cap, which includes an exhaust exit hole in its center, fits into an exhaust end of the outer tube. A plurality of end cap holes are arranged so that gasses leaving the outer tube flow through them. A restrictor disk between the end cap and louver tube includes a central hole coaxial with the louver tube and the exhaust exit hole of the end cap. Restrictor disk holes are in the restrictor disk between the central hole and its perimeter so that gasses leaving the louver tube flow through the central hole and the restrictor disk holes as they leave the muffler. A spiral vane defining a helical passage around the louver tube and inside the outer tube extends the path length of the gasses in the outer tube. A series of fins on the spiral vane extend orthogonal to an axis of the louver tube. A series of inner reverse cones are inside the louver tube upstream of its exhaust end. An exhaust system with this muffler is characterized by moderate backpressure at low rpms and little or negative backpressure at high rpms.
REFERENCES:
patent: 2213614 (1940-09-01), Scarritt
patent: 3262516 (1966-07-01), Borgeson
patent: 3482648 (1969-12-01), Reeve
patent: 3786791 (1974-01-01), Richardson
patent: 3863733 (1975-02-01), Raudman, Jr. et al.
patent: 4149611 (1979-04-01), Taguchi
patent: 4234054 (1980-11-01), Chapin
patent: 4263982 (1981-04-01), Feuling
patent: 4354573 (1982-10-01), Tabata et al.
patent: 4589515 (1986-05-01), Omura
patent: 4595073 (1986-06-01), Thawani
patent: 4683978 (1987-08-01), Venter
patent: 4690245 (1987-09-01), Gregorich et al.
patent: 4705138 (1987-11-01), Reese
patent: 4715472 (1987-12-01), McKee
patent: 5109950 (1992-05-01), Lescher
patent: 5152366 (1992-10-01), Reitz
patent: 5183976 (1993-02-01), Plemons, Jr.
patent: 5246473 (1993-09-01), Harris
patent: 5633482 (1997-05-01), Erion et al.
LandOfFree
Self-tuning exhaust muffler does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self-tuning exhaust muffler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-tuning exhaust muffler will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-691834