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US 6,551,156 B2Granted
Induction system for personal watercraft
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsMitsuyoshi Nakamura, Yoshimasa Kinoshita
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AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsMitsuyoshi Nakamura, Yoshimasa Kinoshita
Estimating the term…
A small watercraft includes an engine and an improved induction and charging forming system. The engine includes a fuel injection system with at least one fuel injector and a fuel delivery conduit for supplying fuel to the at least one fuel injector. The induction system includes an intake box configured to protect the at least one fuel injector and the fuel delivery conduit from damage that can be caused by heat generated from a portion of an exhaust system and/or water that may collect in a hull of the watercraft. The induction system can also include a set of throttle bodies. Each throttle body includes a throttle valve. The throttle valves are connected to a throttle shaft assembly. A pulley is attached to the throttle shaft assembly and is disposed between adjacent throttle bodies.
A small watercraft comprising a hull defining an engine compartment, an internal combustion engine disposed within the engine compartment and having an engine body containing at least one combustion chamber, the engine including an output shaft that drives a propulsion device of the watercraft, an induction system arranged within the hull to supply air to the combustion chamber, the induction system including at least one intake conduit, at least one throttle body communicating with the intake conduit, and at least one intake box, the intake conduit having an outlet end connected to the engine body and extending generally away from the engine body, the throttle body being connected to an inlet of the intake conduit and also generally extending away from the engine body, the intake conduit and the throttle body defining an intake passage, the intake box being connected to an inlet end of the throttle body, at least one fuel injector connected to a fuel delivery conduit and arranged to inject fuel into the intake passage, the at least one fuel injector and the fuel delivery conduit being generally disposed on an upper side of the throttle body between the intake box and the engine body, the intake box defining a recess in which at least a portion of the fuel delivery conduit or the fuel injector is at least partially disposed.
A small watercraft comprising a hull defining an engine compartment, an internal combustion engine disposed within the engine compartment and having an engine body containing at least one combustion chamber, the engine including an output shaft that drives a propulsion device of the watercraft, an induction system arranged within the hull to supply air to the combustion chamber, the induction system including at least one intake conduit, at least one throttle body communicating with the intake conduit, and at least one intake box, the intake conduit having an outlet end connected to the engine body and extending generally away from the engine body, the throttle body being connected to an inlet of the intake conduit and also generally extending away from the engine body, the intake conduit and the throttle body defining an intake passage, the intake box being connected to an inlet end of the throttle body, at least one fuel injector connected to a fuel delivery conduit and arranged to inject fuel into the intake passage, the at least one fuel injector and the fuel delivery conduit being generally disposed on an upper side of the throttle body between the intake box and the engine body, the intake box defining a shield positioned generally above or generally below at least a portion of the fuel delivery conduit or the fuel injector.
A small watercraft comprising a hull defining an engine compartment, an internal combustion engine disposed within the engine compartment and having an engine body containing at least one combustion chamber, the engine including an output shaft that drives a propulsion device of the watercraft, an induction system arranged within the hull to supply air to the combustion chamber, the induction system including at least one intake conduit, at least a first throttle body and a second throttle body communicating with the intake conduit, and at least one intake box, the intake conduit having an outlet end connected to the engine body and extending generally away from the engine body, the throttle body being connected to an inlet of the intake conduit and also generally extending away from the engine body, the intake conduit and the throttle body defining an intake passage, the intake box being connected to an inlet end of the throttle body, at least one fuel injector connected to a fuel delivery conduit and arranged to inject fuel into the intake passage, the first throttle body including a first throttle valve positioned on a first throttle shaft, the second throttle body including a second throttle valve positioned on a second throttle shaft, a pulley mounted on either the first or second throttle shaft and disposed between the first and second throttle bodies, the pulley being coupled to a throttle operator.
A small watercraft comprising a hull defining an engine compartment, an internal combustion engine disposed within the engine compartment and having an engine body containing at least one combustion chamber, the engine including an output shaft that drives a propulsion device of the watercraft, an induction system arranged within the hull to supply air to the combustion chamber, the induction system including at least one intake conduit, at least one throttle body communicating with the intake conduit, and at least one intake box, the intake conduit having an outlet end connected to the engine body and extending generally away from the engine body, the throttle body being connected to an inlet of the intake conduit and also generally extending away from the engine body, the intake conduit and the throttle body defining an intake passage, the intake box being connected to an inlet end of the throttle body, at least one fuel injector connected to a fuel delivery conduit and arranged to inject fule into the intake passage, the at least one fuel injector and the fuel delivery conduit being generally disposed on a side of the throttle body between the intake box and the engine body, the intake box defining a recess in which at least a portion of the fuel delivery conduit or the fuel injector is at least partially disposed.
A small watercraft comprising a hull defining an engine compartment, an internal combustion engine disposed within the engine compartment and having an engine body containing at least one combustion chamber, the engine including an output shaft that drives a propulsion device of the watercraft, an induction system arranged within the hull to supply air to the combustion chamber, the induction system including at least one intake conduit, at least one throttle body communicating with the intake conduit, and at least one intake box, the intake conduit having an outlet end connected to the engine body and extending generally away from the engine body, the throttle body being connected to an inlet of the intake conduit and also generally extending away from the engine body, the intake conduit and the throttle body defining an intake passage, the intake box being connected to an inlet end of the throttle body, at least one fuel injector connected to a fuel delivery conduit and arranged to inject fuel into the intake passage, the at least one fuel injector and the fuel delivery conduit being generally disposed on a side of the throttle body between the intake box and the engine body, the intake box defining a shield positioned generally above or generally below at least a portion of the fuel delivery conduit or the fuel injector.
Dependencies are inferred from the claim text.