Device for supplying fuel to a pressure carburetor
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsShunji Minami, Hiroshi Kimura
Life of this patent
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Abstract
Several embodiments of induction systems having forced induction and a regulated fuel pump for delivering fuel to the charge forming device at a pressure that is related to the pressure in the induction system. In some embodiments the pressure is sensed above the level of the fuel in the fuel bowl of the charge forming device, and in others the pressure is sensed in a plenum chamber upstream of the charge forming device inlet. A check valve arrangement is also provided in the fuel line in one embodiment for preventing the backflow of fuel under conditions when the engine is stopped.
Claims6
In a fuel feed and induction system for an internal combustion engine comprising a charge forming device having a fuel bowl, a float controlled valve for controlling the level of fuel in said fuel bowl, and a fuel discharge circuit fed by said fuel bowl, and a fuel pump for delivering fuel to said fuel bowl, the improvement comprising means for controlling the pressure at which said fuel pump delivers fuel to said fuel bowl in relation to the pressure above the fuel in said fuel bowl for maintaining a predetermined pressure differential between the delivery pressure and the pressure in the fuel bowl.
A fuel feed and induction system as set forth in any of the preceding claims further including a supercharger discharging into the inlet of the charge forming device.
Dependencies are inferred from the claim text.