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AssigneeNissan Motor Co., Ltd.
InventorsYasuhiko Nakagawa, Masahiro Sasaki, Teruyuki Ito, Tosimitu Matuoka
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An automotive internal combustion engine having main and auxiliary combustion chambers for each of the cylinders and combined with a carburetor is provided with an air-fuel mixture induction system which comprises an intake manifold providing communication between the carburetor and each of the main combustion chambers, characterized by passageways leading to the auxiliary combustion chambers and open into the intake manifold or the intake ports for the main combustion chambers through an opening in the main tube portion of the intake manifold, openings respectively formed in the runner portions of the intake manifold or openings formed in wall portions defining the intake ports for the main combustion chambers.
An air-fuel mixture induction system for an automotive multiple-cylinder internal combustion engine having main and auxiliary combustion chambers for each of the engine cylinders and combined with a carburetor having a throttle valve, comprising main mixture delivery passageway means having internal wall portions formed with intake ports respectively in communication with the main combustion chambers of the cylinders and an intake manifold consisting of a main tube portion having an internal space communicating with the carburetor downstream of the throttle valve and runner portions branched from said main tube portion and formed with passageways communicating upstream with said internal space in said main tube portion and downstream with said intake ports, and auxiliary passageways each providing communication between each of the auxiliary combustion chambers and said internal space in said main tube portion through an opening in at least one of said internal wall portions.
Dependencies are inferred from the claim text.