Fuel supplying device for marine propulsion engine
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsAkihiro Hoshiba, Masaki Okazaki, Junichi Hasegawa
Life of this patent
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Abstract
An outboard motor having a charge forming system including an enrichment fuel device that supplies additional fuel and air to the engine for starting and warm up. The fuel and air are supplied from one charge former of the engine and are delivered to a balance passage of a spacer between the charge formers and the intake manifold. The additional air supplied by the enrichment device is drawn from an air circuit of the carburetor so as to reduce the discharge pressure of the fuel discharge circuits of the carburetor to draw additional enrichment fuel from those discharge circuits when the enrichment device is in operation.
Claims20
In an enrichment device for providing additional fuel to an engine for accommodating a certain condition, said engine comprising a charge former having a fuel bowl for containing a head of fuel, a discharge circuit comprised of a fuel conduit connecting said fuel bowl with a discharge port in an induction passage of said charge former, an air conduit continuously communicating a source of atmospheric air with said fuel conduit for mixture of air with the fuel delivered through said discharge port under all discharge conditions, said enrichment device comprising means for delivering fuel and air to said engine in addition to that supplied by said charge former under certain conditions, the improvement comprising said additional air being supplied to said engine by said enrichment device being drawn from said air conduit for reducing the pressure in said fuel conduit of said charge former for further increasing the fuel delivered to said engine in response to the certain condition.
In a enrichment device for providing additional fuel to an engine for accommodating a certain condition, said engine comprising a charge former having a fuel bowl for containing a head of fuel, a discharge circuit comprised of a fuel conduit connecting said fuel bowl with a discharge port in an induction passage of said charge former, an air conduit communicating a source of atmospheric air with said fuel conduit for mixture with the fuel delivered through said discharge port, said enrichment device comprising means for delivering fuel and air to said engine in addition to that supplied by said charge former under certain conditions, the improvement comprising said additional air being supplied to said engine being drawn from said air conduit for reducing the pressure in said fuel conduit of said charge former for further increasing the fuel delivered to said engine in response to the certain condition, said fuel discharge circuit of said charge former comprises an idle circuit.
Dependencies are inferred from the claim text.