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US 5,769,061 AGranted
Fuel supply system having a suction filter in a sub-tank
AssigneeDenso Corporation
InventorsKiyoshi Nagata, Masashi Miyamoto, Kouji Izutani
Life of this patent
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Abstract
A fuel pump for pumping fuel is provided in a sub-tank suspended in a fuel tank in order to reserve a fuel volume necessary for the fuel pump to be started on an inlet side of the fuel pump in the fuel tank. A fuel level holding member formed so as to rise upward on a suction opening side of the fuel pump reserves the fuel in space of the risen part. Thus, a structure for reserving the fuel volume pumped by the fuel pump in the fuel tank can be obtained with a simple construction.
Claims12
A fuel supply system comprising:
- a fuel tank for storing fuel;
- a sub-tank provided in the fuel tank and having a fuel intake port for taking the fuel from a lower part of the fuel tank to an inside thereof;
- a suction filter provided in the sub-tank;
- a fuel pump provided in the sub-tank to pump the fuel in the sub-tank from a suction opening side thereof through the suction filter;
- a flange for fixing the sub-tank to the fuel tank;
- and
- a fuel level holding member formed to rise on the suction opening side of the fuel pump for accumulating the fuel in a space defined by a rising part thereof.
4 more elements
A fuel supply system comprising:
- a fuel tank;
- a sub-tank provided in a bottom of the fuel tank and having at a bottom thereof a communicating space for introducing fuel from an outside thereof to an inside thereof;
- a fuel accumulating chamber formed in the sub-tank;
- a fuel pump for pumping and pressurizing the fuel from the fuel accumulating chamber;
- a suction filter having a part housed in the fuel accumulating chamber for removing foreign material entering the fuel pump;
- a jet pump for transferring the fuel from the outside of the sub-tank to the fuel accumulating chamber by using a fluid energy of a part of the fuel discharged from the fuel pump;
- a suction passage for passing the fuel sucked by the jet pump;
- a partition wall part formed in a gravity direction and partitions the fuel accumulating chamber and the suction passage;
- and
- the suction filter having an outer peripheral surface covered by a mesh to provide a closed space therein by a fuel oil film formed on the mesh.
7 more elements
Dependencies are inferred from the claim text.