Variably tuned Helmholtz resonator with linear response controll

Details Variably tuned Helmholtz resonator with linear response controll Variably tuned Helmholtz resonator with linear response controll

1997-07-29

1998-06-30

Okonsky, David A.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 3510

Patent

active

057718512

ABSTRACT:
A variably tuned Helmholtz resonator which has a connection establishing fluid communication between fixed volume chamber and a duct of an induction system for an internal combustion engine. The tubular connection has a special configuration which affects changes in open area and length of the tubular connection so as to create a linear relationship between the resonant frequency and the angular position of the tuning plate. The tuning plate is positioned correspondingly to engine speed to provide noise attenuation over a wide range of engine speeds.

REFERENCES:
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patent: 4592311 (1986-06-01), Makino
patent: 5162621 (1992-11-01), Lee
patent: 5267543 (1993-12-01), Novak et al.
patent: 5377629 (1995-01-01), Brackett et al.
patent: 5492089 (1996-02-01), Hiraoka et al.
patent: 5572966 (1996-11-01), Doddy et al.

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