초록 ▼

A fuel supplying apparatus for use with a main fuel tank and an engine includes a fuel discharge pipe for supplying fuel to the engine, a sub-tank disposed in the main fuel tank, a fuel pump for pressurizing fuel and a jet pump. The jet pump includes a throat and a nozzle projecting into the throat

A fuel supplying apparatus for use with a main fuel tank and an engine includes a fuel discharge pipe for supplying fuel to the engine, a sub-tank disposed in the main fuel tank, a fuel pump for pressurizing fuel and a jet pump. The jet pump includes a throat and a nozzle projecting into the throat from the bottom wall of the sub-tank. The throat has a fuel inlet opening disposed outside the sub-tank and a fuel discharge opening disposed in the sub-tank. When pressured fuel is injected into the inlet opening of the throat, the fuel in the main tank is sucked to the sub-tank.

대표청구항 ▼

1. A fuel supplying apparatus for use with a main fuel tank and an engine comprising:a fuel discharge pipe for supplying fuel to the engine; a sub-tank having a bottom wall and disposed in the main fuel tank; a fuel pump for pressurizing fuel, said fuel pump having a discharge port connected to said

1. A fuel supplying apparatus for use with a main fuel tank and an engine comprising:a fuel discharge pipe for supplying fuel to the engine; a sub-tank having a bottom wall and disposed in the main fuel tank; a fuel pump for pressurizing fuel, said fuel pump having a discharge port connected to said fuel discharge pipe and disposed in said sub-tank; and a jet pump including a throat having a fuel inlet opening disposed outside said sub-tank and a fuel discharge opening disposed inside said sub-tank and a nozzle having a fuel inlet portion connected to said discharge port of said fuel pump and a nozzle portion projecting from said sub-tank near said fuel inlet opening of said throat, thereby injecting pressured fuel into said inlet opening of said throat, wherein said fuel inlet portion of said nozzle is integrated with said fuel pump. 2. The fuel supplying apparatus as claimed in claim 1,wherein said fuel pump has a vent for venting gases generated inside said fuel pump. 3. The fuel supplying apparatus as claimed in claim 1,wherein said sub-tank and said throat are made of resinous material and integrated with each other. 4. The fuel supply apparatus as claimed in claim 1,wherein said nozzle comprises a separate nozzle member fixed to said sub-tank by fixing means. 5. The fuel supplying apparatus as claimed in claim 1, wherein said sub-tank has a cushion member between the bottom of said sub-tank and the bottom of the main tank.6. The fuel supplying apparatus as claimed in claim 1, wherein said jet pump further comprises a check valve for preventing fuel in said sub-tank to said main tank at said fuel discharge-opening of said throat.7. The fuel supplying apparatus as claimed in claim 1, wherein said fuel pump comprises a casing, and said fuel inlet portion is integrated with said casing.8. The fuel supplying apparatus as claimed in claim 1, wherein said fuel inlet opening of said throat is disposed at said bottom wall of said sub-tank.9. The fuel supplying apparatus as claimed in claim 4, wherein said sub-tank has a through hole to which said nozzle is inserted.10. The fuel supplying apparatus as claimed in claim 8, wherein said sub-tank has a member at the bottom thereof for providing a space between said bottom wall of said sub-tank and the bottom of the main tank, and said fuel inlet opening is disposed in said space.11. The fuel supplying apparatus as claimed in claim 1, wherein said sub-tank has a step bottom for accommodating said nozzle and said throat between said sub-tank and said main fuel tank.12. A fuel supplying apparatus for use with a main fuel tank and an engine comprising:a fuel discharge pipe for supplying fuel to the engine; a sub-tank having a bottom wall and disposed in the main fuel tank; a fuel pump for pressurizing fuel, said fuel pump having a discharge port connected to said fuel discharge pipe and disposed in said sub-tank; and a jet pump including a throat having a fuel inlet opening disposed outside said sub-tank and a fuel discharge opening disposed inside said sub-tank and a nozzle having a fuel inlet portion connected to said discharge port of said fuel pump and a nozzle portion projecting from said sub-tank near said fuel inlet opening of said throat, thereby injecting pressured fuel into said inlet opening of said throat, wherein said fuel pump includes a resinous case, and said nozzle is integrated with said resinous case.