Patent ID: 6520161
Filing Date: 2003-02-18
Classification: F02M,Y10T

Abstract:
Fuel supply system comprising:a sub-tank positioned in fuel tank; a fuel pump positioned in the sub-tank, said fuel pump adapted to suck fuel from the sub-tank and discharge fuel from the sub-tank; a throat provided in a bottom portion of the sub-tank, said throat opened at one end thereof as a suction port to an exterior of the sub-tank, said throat open at another end as a supply port to the interior of the sub-tank; a jet pump having a nozzle portion opposed to the suction port, wherein fuel is ejected from the nozzle portion into the interior of the throat, the fuel in the exterior of the sub-tank being thereby sucked from the suction port and supplied to the interior of the sub-tank; and a check valve provided in the sub-tank, said check valve closing the supply port with only weight of the check valve, said check valve adapted to prevent the fuel in the sub-tank from flowing out to an exterior of the sub-tank through the throat; the throat positioned incliningly with respect to a bottom surface of the sub-tank so that a height of the throat increases gradually from the suction port toward the supply port with a plane of an opening of the supply port extending substantially vertically.