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US 2002/0152998 A1Published application
Fuel supply for engine
AssigneeYamaha Marine Kabushiki Kaisha
InventorsGoichi Katayama, Sadato Yoshida, Masanori Takahashi
Life of this patent
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AssigneeYamaha Marine Kabushiki Kaisha
InventorsGoichi Katayama, Sadato Yoshida, Masanori Takahashi
Estimating the term…
A fuel supply for an internal combustion engine includes an improved construction for inhibiting vapor from appearing in the fuel supplied to the engine's combustion chamber(s). A fuel injector, as one of fuel supply devices, is provided for supplying fuel to the combustion chamber of the engine. There are a first and second fuel reservoirs. The first fuel reservoir stores fuel and delivers it to the second fuel reservoir through a first fuel supply conduit, while the second fuel reservoir temporarily store the fuel and delivers it to the fuel injector through a second fuel supply conduit. The excess fuel is returned to the second fuel reservoir from the fuel injector through a fuel return conduit. The fuel supply includes a fuel cooling device for cooling the fuel passing through at least one of the conduits. The construction of the fuel supply and the fuel cooling device permits them to be located with the tight confines between the engine and a protective enclosure (e.g., a cowling of an outboard motor).
An internal combustion engine comprising a cylinder body defining a cylinder bore in which a piston reciprocates, a cylinder head affixed to an end of the cylinder body and defining a combustion chamber with the cylinder head and the piston, a fuel injection system including a fuel injector supplying fuel to the combustion chamber, a fuel reservoir at least temporarily storing the fuel therein, a fuel conduit communicating with at least one of the fuel reservoir and the fuel injector, and a fuel cooling device to cool the fuel passing through the fuel conduit.
An internal combustion engine additionally comprising a first fuel supply conduit supplying the fuel to the fuel reservoir, and a second fuel supply conduit supplying the fuel from the fuel reservoir to the fuel injector, and a fuel return conduit returning the excess fuel from the fuel injector to the fuel reservoir, wherein at least one of the first fuel supply conduit, the second fuel supply conduit and the fuel return conduit is the fuel conduit which carries the fuel cooled by the fuel cooling device.
A fuel cooling device for a fuel supply system that supplies fuel to a combustion chamber of an internal combustion engine through a fuel delivery passage, the fuel cooling device comprising a fuel coolant passage extending, at least in part, along the fuel delivery passage.
An internal combustion engine comprising a cylinder body defining a cylinder bore in which a piston reciprocates, a cylinder head affixed to an end of the cylinder and defining a combustion chamber with the cylinder head and the piston, a fuel injector spraying fuel toward the combustion chamber, delivering means for delivering the fuel to the fuel injector, the delivering means including a fuel passage, and a cooling mechanism arranged to cool the fuel passing through the fuel passage.
Dependencies are inferred from the claim text.