Fuel supply apparatus and vapor separator in outboard engine
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsMikio Hamada, Hiroyuki Nunome
Life of this patent
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Abstract
With a low-pressure pump, fuel is supplied to a vapor separator comprising an air discharge port and a ball valve for closing the air discharge port in association with a rise in fluid level of the fuel supplied to the vapor separator. When the fuel is filled into the vapor separator entirely, the ball valve acts to tightly close the vapor separator, thereby pressurizing the fuel in the vapor separator.
Claims34
A fuel supply apparatus in an outboard engine provided with a fuel injection system, for supplying fuel from a fuel tank to an injector of the outboard engine, the apparatus comprising:
- a low-pressure pump for sucking the fuel from the fuel tank;
- a vapor separator for temporarily storing therein the fuel sucked by the low-pressure pump from the fuel tank;
- and
- a fuel pump located in the vapor separator and for supplying the fuel from the vapor separator to the injector of the outboard engine while pressuring the fuel;
- wherein the low-pressure pump is used to fill the fuel into the vapor separator entirely and pressurize the fuel filled in the vapor separator at a predetermined pressure value or more.
A vapor separator for temporarily storing therein fuel sucked and fed by a low-pressure pump from a fuel tank, wherein the low-pressure pump is adapted to fill the fuel into the vapor separator entirely and increase pressure of the fuel filled in the vapor separator.
A vapor separator which temporarily stores therein fuel sucked and fed by a low-temperature pump from a fuel tank, the vapor separator comprising:
- pressurizing means for filling the fuel into the vapor separator and increasing the pressure of the fuel filled in the vapor separator;
- a fuel pump located in the vapor separator for discharging the fuel having been pressurized by the pressurizing means while further pressurizing the fuel to supply the further pressurized fuel to an injector of an outboard engine;
- and
- a return pipe for returning return fuel from the fuel pump to a place upstream of the low-pressure pump.
A vapor separator which temporarily stores therein fuel sucked and fed by a low-temperature pump from a fuel tank, the vapor separator comprising:
- pressurizing means for filling the fuel into the vapor separator and increasing the pressure of the fuel filled in the vapor separator;
- a fuel pump located in the vapor separator for discharging the fuel having been pressurized by the pressurizing means while further pressurizing the fuel to supply the further pressurized fuel to an injector of an outboard engine;
- a fuel pressure sensor for detecting pressure of the fuel discharged from the fuel pump;
- and
- pump control means for controlling the fuel pump based on the fuel pressure detected by the fuel pressure sensor so that the pressure of the fuel discharged from the fuel pump reaches a target fuel pressure.
Dependencies are inferred from the claim text.