Patent ID: 7249585

Claim:
An intake manifold ( 3 ) with a swirl system ( 14 ) for an internal combustion engine ( 1 ) having a number of cylinders ( 2 ); the intake manifold ( 3 ) comprises, for each cylinder ( 2 ), an intake conduit ( 9 ) connecting the intake manifold ( 3 ) to the cylinder ( 2 ) and in turn comprising two parallel channels ( 10 ); the swirl system ( 14 ) comprises, for each intake conduit ( 9 ), a throttle valve ( 15 ) housed inside a channel ( 10 ) of the intake conduit ( 9 ) to vary the air flow section of the channel ( 10 ); and the intake manifold ( 3 ) is characterized in that each throttle valve ( 15 ) comprises: a main body ( 21 ) mounted to rotate about a central axis ( 22 ) and having a throttle ( 23 ) for sealing a channel ( 10 ) of an intake conduit ( 9 ); a fastening flange ( 26 ) fitted to the main body ( 21 ) to rotate with respect to the main body ( 21 ), and made integral with an interface flange ( 31 ) of the intake manifold ( 3 ); a fastening member ( 27 ) made integral with the main body ( 21 ) to hold the fastening flange ( 26 ) in place, and which is given motion by an actuating device ( 16 ); and a lip seal ( 35 ) held in place by the fastening flange ( 26 ).