Resonator

Details Resonator Resonator

2008-06-12

2011-12-27

Cronin, Stephen K (Department: 3747)

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

Reexamination Certificate

active

08082898

ABSTRACT:
A resonator is provided with a neck portion and a resonator main body. The resonator main body includes a main volume chamber communicated with an air intake duct of an internal combustion engine for a vehicle via the neck portion, and at least one sub-volume chamber directly connected to the main volume chamber. The resonator main body is configured to have both a Helmholtz-resonator functional part whose resonance frequency is determined based on a total volumetric capacity of the resonator main body, substantially corresponding to a summed value of a volume of the main volume chamber and a volume of the sub-volume chamber, and a side-branch-resonator functional part whose resonance frequency is determined based on a longitudinal length of the sub-volume chamber.

REFERENCES:
patent: 6705267 (2004-03-01), Westerbeke et al.
patent: 2002/0195076 (2002-12-01), Nomizo et al.
patent: 2008/0236534 (2008-10-01), Mayer et al.
patent: 2009/0236172 (2009-09-01), Ross et al.
patent: 8-338330 (1996-12-01), None
patent: 11-294278 (1999-10-01), None

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