Air intake system for a fuel injection type four cycle engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorHideaki Ueka
Life of this patent
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Abstract
A motorcycle powered by a fuel injected four cycle internal combustion engine having three valves per cylinder served by a Siamese type intake port arrangement. The centers of the inlet openings of the intake ports are offset from the center of the center intake port served thereby and a single fuel injector is disposed for spraying fuel into each of the intake openings so that all ports will receive equal amounts of fuel and so that the fuel injectors are disposed in parallel relationship to permit a single fuel rail to supply fuel to all of the fuel injectors.
Claims20
An internal combustion engine having a combustion chamber, at least three intake ports serving said combustion chamber in side by side fashion comprising a center intake port and a pair of side intake ports, a common intake opening formed in an external surface of said engine, a Siamese type intake passage system extending from said intake opening to each of said intake ports for delivering a charge to said intake ports, said common intake opening being offset from the center of said center intake port toward one of said side intake ports, and a fuel injector for spraying fuel into said intake passages from a point offset from the center of said intake opening toward the center of said center intake port.
An internal combustion engine having a cylinder bank with a plurality of aligned cylinders, each of said cylinders being served by at least three intake ports comprised of a center intake port and a pair of side intake ports, said engine having a plurality of intake openings formed along one side of said engine in aligned fashion, there being one intake opening for each of said cylinders, a plurality of Siamese intake passages each extending from one of said intake openings to the intake ports of the respective cylinder, the center of each of said intake openings being offset from the center of the center intake port served by the respective intake opening, a plurality of fuel injectors, one for each cylinder, each of said fuel injectors being disposed relative to its respective intake opening for spraying fuel in a direction along a single spray axis in said alignment with the center axis of the respective center intake port served by the respective intake opening, said fuel injectors all extending substantially parallel to each other, and a common fuel rail for delivering fuel to each of said fuel injectors.
Dependencies are inferred from the claim text.