Air intake silencer
AssigneeBombardier Inc.
InventorGeorge A. Gowing
Life of this patent
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Abstract
An air intake silencer for an internal combustion engine of the two-stroke cycle type, for example a snowmobile engine, comprising a housing for connection to the intake side of the engine carburetor, and a filter chamber and resonance chamber defined within the housing to filter out engine noise in high and low frequency ranges. An intake duct of smooth uninterrupted tubular configuration extends in an axial direction through the housing and has a perforate tube section through which the incoming air is smoothly distributed to the filter chamber. The resonance chamber is separated from the filter chamber by means of a perforated baffle plate, the dimensions and volume of the chambers being selected to correspond to the frequency ranges of the noises to be eliminated.
Claims11
An air intake silencer for an internal combustion engine of the two-stroke cycle type and having outlet means for connection to the intake side of engine carburetor means, comprising:
- a. a housing having said outlet means, said housing defining a first chamber of elongate form transversely of said outlet means, and having an inlet opening at one end,
- b. a tubular inlet duct extending through said inlet opening and having a perforate section extending within said first chamber transversely of said outlet means and terminating close to an end of said first chamber opposite to said inlet opening,
- c. one wall of said first chamber being defined by a perforate plate on an opposite side of which is a resonance chamber which communicates with the first chamber through perforations in said one wall but is otherwise closed.
Dependencies are inferred from the claim text.