Patent ID: 8327828

Claim:
A fuel supply system comprising: a fuel tank that is filled with fuel; a fuel pump supplying an engine with the fuel in the fuel tank; a suction line connecting the fuel tank to the fuel pump; a supply line connecting a first outlet of the fuel pump to the engine; and a jet nozzle disposed in the suction line to inject a portion of fuel that-is supplied from the fuel pump in a flowing direction of the fuel supplied from the fuel tank; wherein a portion of the fuel that is supplied from the fuel pump is supplied to the jet nozzle through a jet line that directly fluidly connects a second outlet of the fuel pump with the jet nozzle; wherein the fuel pump includes: a drive motor; a shaft that is rotated by the drive motor; at least a supply chamber that sucks the fuel from the suction line by the rotation of the shaft to supply the engine with the fuel; and a nozzle chamber that sucks the fuel from the suction line by the rotation of the shaft to supply the jet nozzle with the fuel via the second outlet, wherein the second outlet is not directly fluidly connected to the supply line; and wherein the at least a supply chamber and the nozzle chamber are disposed in a rotational direction of the shaft at a predetermined angle based on the shaft; wherein first and second check valves are respectively mounted at an inlet and an outlet of the at least a supply chamber to prevent fuel in the supply chamber from flowing backward into the suction line; and wherein third and fourth check valves are respectively mounted at an inlet and an outlet of the nozzle chamber to prevent fuel in the nozzle chamber from flowing backward into the suction line.