Resonator
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United States of America Patent
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Dec 27, 2011
Grant Date -
Dec 18, 2008
app pub date -
Jun 12, 2008
filing date -
Jun 14, 2007
priority date (Note) -
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status (Latency Note)
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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.
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