Patent ID: 8459225

Claim:
An intake system of an internal combustion engine, comprising: an intake manifold ( 12 ) including: a plenum chamber ( 15 ); a plurality of feed pipes ( 14 ) having one end secured to said plenum chamber, said plurality of feed pipes ( 14 ) including an interior volume in flow communication with said plenum chamber, said plurality of feed pipes ( 14 ) having an opposing end connected to and with said interior volume in flow communication with respective intake ports of a cylinder head of the internal combustion engine, each of said plurality of feed pipes ( 14 ) including: a.) a casing ( 28 ) covering over an intermediate chamber ( 30 ) within, said casing ( 28 ) having a connection duct ( 34 ) arranged in its interior, said connection duct ( 34 ) fluidically connected to said interior volume ( 24 ) of a respective one of said plurality of feed pipes ( 14 ); b.) an intake control valve ( 49 ) arranged interior to said casing and operable to fluidically open or close said connection duct ( 34 ) to flow between said intermediate chamber ( 30 ) and said interior volume ( 24 ) of said respective one of said plurality of feed pipes ( 14 ), said intake control valve including: i.) a switch chamber ( 48 ) which includes pressure communicating passages or connections ( 60 , 62 ) for communicating an overpressure or subpressure from a means of creating said overpressure or subpressure into said switch chamber ( 48 ); ii.) a flexible diaphragm ( 50 ) arranged between and separating said switch chamber ( 48 ) from said interior volume ( 24 ) and from said intermediate chamber ( 30 ); wherein said connection duct ( 34 ) between the interior volume ( 24 ) of the respective one of said plurality of feed pipes ( 14 ) and its intermediate chamber ( 30 ) is opened or closed by action of said overpressure or subpressure acting on said diaphragm ( 50 ).