Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2011-04-12
2011-04-12
Phillips, Forrest M (Department: 2832)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S212000, C123S184530, C123S184540, C123S184550, C123S184560, C123S184570
Reexamination Certificate
active
07921963
ABSTRACT:
An intake system for an internal combustion engine has an intake silencer30provided with an expansion chamber33, and a connecting pipe40having an inlet46through which air from the expansion chamber flows, and an outlet47through which air flows toward combustion chambers. The connecting pipe40is made of an elastic material having rubber elasticity, and has a connecting part41connected to the intake silencer30, an inner tubular part42extending from the connecting part41into the expansion chamber33and having the inlet46, and an outer tubular part43connecting to a throttle device50. The wall42wof the inner tubular part42is provided with a communication opening44for connecting the expansion chamber33and the air passage45to make the expansion chamber33serve also as a resonance chamber. The outer tubular part43of the connecting pipe40is shorter than the inner tubular part42of the same. The intake silencer is compact and has a combined effect of expansion silencing and resonance silencing.
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Ishizaka Kazuhiro
Ishizuka Kunihiko
Blackman William D.
Carrier Joseph P.
Carrier Blackman & Associates P.C.
Honda Motor Co. Ltd.
Phillips Forrest M
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