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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsShoichi Otaka, Yukio Kondo, Masayuki Kumada, Hideyo Kawamoto, Keiji Miura
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An intake manifold structure for a multi-cylinder engine having first and second independent mixture generators such as carburetors and first and second intake manifolds communicating the mixture generators to respective plural cylinders. A control gas passage and a treating gas passage are provided for introducing a control gas such as return flow exhaust gas, an additional pulse of air or the like, and a treating gas such as crankcase blow-by gas to the manifolds. The control gas passage is arranged to open into the interiors of respective diverging portions of the intake manifolds. The treating gas passage is arranged to open to the interiors of any other portions, avoiding the diverging portions, of the intake manifolds.
In a plural cylinder internal combustion engine which includes a crankcase, a first and a second independent air-fuel gas generating means, first and second intake manifolds each including a first area to which a respective air-fuel gas generating means is mounted and a second area where divergent flow paths are provided, said divergent paths being downstream from the first area in the flow path of the air-fuel gas toward the engine, wherein the improvement comprises:
Dependencies are inferred from the claim text.