Internal-combustion engines – Charge forming device – Multiple carburetors
Patent
1982-01-08
1984-06-05
Lazarus, Ira S.
Internal-combustion engines
Charge forming device
Multiple carburetors
123 59PC, 123336, 123308, 123342, 261 23A, 261 41C, F02B 1300
Patent
active
044522185
ABSTRACT:
A duplex carburetor for an internal combustion engine has a primary barrel having a primary venturi for supplying an air-fuel mixture to an intake manifold under a full range of engine loads and a secondary barrel having a secondary venturi for supplying an air-fuel mixture to the manifold under higher engine loads. The primary venturi has a cross section which ranges from 20% to 30% of that of the secondary venturi. The secondary barrel has a flattened cross-sectional shape such as of a segment of a circle of an ellipse, and is located adjacent to the primary barrel. The intake manifold is of a duplex construction having primary and secondary common passages connected to the primary and secondary barrels, respectively, of the carburetor. The secondary passage of the manifold has a flattened cross-sectional shape such as of a segment of a circle or an ellipse, and is positioned adjacent to the primary passage. The primary passage extends through a region where the secondary passage is divided into a plurality of secondary branches, and is located immediately in front of the shortest one of the secondary branch. The primary passage is also branched into a plurality of primary branches, the shortest of which is displaced out of axial alignment with a central axis of the intake manifold.
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Ishida Tokuzi
Yokoyama Hiroshi
Cross E. Rollins
Lazarus Ira S.
Suzuki Jidosha Kogyo Kabushiki Kaisha
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