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US 7,350,496 B2Granted
Intake muffler
AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsToshiaki Nakayama, Sadahito Fukumori, Kazuhiro Hayashi, Naoya Katoh, Makoto Otsubo
Life of this patent
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Abstract
A resonator is connected with an intake air pipe and forms a resonant chamber therein. The resonator includes a diaphragm, which is generally planar and is disposed between an air passage of the intake air pipe and the resonant chamber. The diaphragm forms multiple oscillation sections, which have different eigenfrequencies, respectively.
Claims19
An intake muffler for an internal combustion engine, comprising:
- an air conductive member that forms an air passage therein to conduct intake air from an air cleaner to the engine;
- and
- a resonator that is connected with the air conductive member between the air cleaner and the engine and forms a closed resonant chamber therein, wherein:
- the resonator includes at least one diaphragm, which is generally planar and is disposed between the air passage and the resonant chamber;
- and
- the at least one diaphragm forms multiple oscillation sections, which have different eigenfrequencies, respectively.
3 more elements
An intake muffler comprising:
- an air conductive member that forms an air passage therein to conduct intake air;
- a resonator that is connected with the air conductive member and forms a resonant chamber therein, wherein:
- the resonator includes a diaphragm, which is generally planar and is disposed between the air passage and the resonant chamber;
- and
- the diaphragm includes a magnetic material;
- and
- an adjuster that adjusts an eigenfrequency of the diaphragm by applying a magnetic force to the diaphragm.
4 more elements
Dependencies are inferred from the claim text.