Idle air bypass valve acoustic diverter passage
AssigneeVisteon Global Technologies, Inc.
InventorsChristopher Edward Shaw, James T. Dumas, James John Kempf
Life of this patent
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Abstract
An arrangement for reducing noise produced by an engine idle air bypass valve and passage includes positioning an acoustic diverter at the end of the air bypass passage to force the noise away from exterior surfaces of a downstream chamber and toward the internal cavities of the engine such as a cylinder head. The diverter of the present invention reduces noise without causing restriction of air flow through the air bypass passage.
Claims11
A noise reduction arrangement for an idle air bypass passage used to supply air to an engine, the idle air bypass passage having an air inlet for receiving a flow of air from an air intake duct and an air outlet coupled to a manifold on the engine to selectively allow a flow of air to bypass a throttle valve assembly connected to the engine, wherein the noise reduction arrangement comprises:
- an acoustic diverter positioned at the idle air bypass passage air outlet and arranged to limit sound waves generated by the air flowing through the bypass passage from traveling directly toward any exterior walls proximate the air outlet.
A method for reducing noise generated by air flowing through an idle air bypass passage used to supply air to an engine, the idle air bypass passage having an air inlet for receiving a flow of air from an air intake duct and an air outlet coupled to a manifold on the engine to selectively allow a flow of air to bypass a throttle valve assembly connected to the engine, the method comprising:
- diverting sound waves generated by air exiting the idle air bypass passage air outlet and to limit the sound waves from traveling directly toward any exterior walls proximate the air outlet.
Dependencies are inferred from the claim text.