Fleit & Jacobson
Intake system of an internal combustion engine
 An intake system of an internal combustion engine having a carburetor with a primary venturi and a secondary venturi concentrically disposed within the primary venturi by a bridge member which extends into contact with an inner wall of a throat portion of the primary venturi. A fuel delivery conduit is disposed within the bridge member and spans the secondary venturi with its leading end sealingly received in the side of the secondary venturi opposite the bridge member. The fuel delivery conduit is inclined with respect to the axis of the secondary venturi so that the leading end portion of the conduit extends in an upstream direction. The fuel delivery conduit also has an opening through which fuel is dischargable. A single needle member is fixedly attached to the bottom of the secondary venturi and projects in a downstream direction with respect to the flow of the air passing through the secondary venturi. The needle member is in substantial axial alignment with the portion of the secondary venturi from which the spanning fuel delivery conduit projects into the secondary venturi. 
Nissan Motor Company, Limited
F Y F Y
F02M Y10S F02M Y10S
inventional additional inventional additional
Mitsumasa Masaaki
Inoue Saito