Muffler with variable damping characteristics

Details Muffler with variable damping characteristics Muffler with variable damping characteristics

1996-10-25

1998-10-13

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

F01N 100

Patent

active

058214747

ABSTRACT:
A muffler and an actuating cell provided so that the acoustic properties of the muffler can be changed. The pressure drop in the muffler is fed to the actuating cell as a control pressure. The actuating cell has a plurality of chambers which are separated by diaphragms. Each diaphragm is supported by a spring and each chamber has a pressure connection. A first pressure line feeds the total gas pressure to the overpressure side of the first diaphragm. Another pressure line directs the static gas pressure to the low-pressure side of this diaphragm. Attached to the diaphragm is a piston rod which carries a valve closing element which closes or opens a gas feed pipe.

REFERENCES:
patent: 2072372 (1937-03-01), Kingsley
patent: 3620330 (1971-11-01), Hall
patent: 4484659 (1984-11-01), Buchwalder
patent: 5614699 (1997-03-01), Yashiro et al.

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