Return fuel diffusion device and fuel guide
View Patent ↗A fuel pump module mounted to a fuel tank may employ a flange on a top surface of the fuel tank, a fuel inlet pipe that passes through the flange, a fuel reservoir situated near a bottom interior surface of the fuel tank, and a fuel diffuser, which may be attached to the fuel inlet pipe, that protrudes away from the flange into an interior volume of the reservoir. A fuel cylinder may surround at least part of a longitudinal length of the fuel diffuser to control passage of fuel and bubbles and may have a first end that is open and a second end that is attached to a top surface of a bottom wall of the reservoir. Alternatively, the fuel cylinder may be attached at a first end to the fuel inlet pipe and define a second end that is open such that the fuel cylinder and a reservoir bottom define a gap therebetween.
1. A fuel pump module comprising:
a flange;
a fuel inlet pipe that passes through the flange;
a fuel diffuser attached to the fuel inlet pipe; and
a fuel cylinder located completely around part of a length of the fuel diffuser, the fuel cylinder defining a plurality of apertures at a first end of said fuel cylinder and an open end at a second end of the fuel cylinder opposite the first end.
2. The fuel pump module according to claim 1 , further comprising:
a reservoir, wherein the fuel diffuser protrudes into an interior volume of the reservoir.
3. The fuel pump module according to claim 1 , wherein the fuel cylinder is attached to an interior bottom surface of the reservoir.
4. The fuel pump module according to claim 1 , wherein the fuel diffuser and a reservoir bottom define a gap therebetween.
5. The fuel pump module according to claim 1 , wherein the plurality of apertures extend through a sidewall of the fuel cylinder.
6. The fuel pump module according to claim 1 , further comprising:
a jet pump; and
a jet pump supply tube connected to the fuel inlet pipe and the jet pump.
7. The fuel pump module according to claim 1 , wherein the plurality of apertures extend through an end wall of the fuel cylinder.
8. A fuel pump module to mount to a fuel tank, the fuel pump module comprising:
a flange residing on a top surface of the fuel tank;
a fuel inlet pipe that passes through the flange;
a reservoir residing proximate a bottom interior surface of the fuel tank;
a fuel diffuser attached to the fuel inlet pipe, wherein the fuel diffuser protrudes into an interior volume of the reservoir; and
a fuel cylinder surrounding at least part of a longitudinal length of the fuel diffuser, the fuel cylinder defining a plurality of apertures at a first end of said fuel cylinder and an open end at a second end of the fuel cylinder opposite the first end.
9. The fuel pump module according to claim 8 , wherein the second end is attached to a top surface of a bottom wall of the reservoir.
10. The fuel pump module according to claim 8 , wherein the fuel diffuser and a reservoir bottom define a gap therebetween.
11. The fuel pump module according to claim 8 , wherein the plurality of apertures extend through a sidewall of the fuel cylinder.
12. The fuel pump module according to claim 8 , further comprising:
a jet pump; and
a jet pump supply tube connected to the fuel inlet pipe and the jet pump.
13. The fuel pump module according to claim 8 , wherein the fuel cylinder is attached at the first end to the fuel inlet pipe.
14. The fuel pump module according to claim 13 , wherein the first end of the fuel cylinder is a flat surface that defines the plurality of apertures.
15. The fuel pump module according to claim 14 , wherein the fuel inlet pipe passes through the flat surface of the first end.
16. A fuel pump module mountable to a fuel tank, the fuel pump module comprising:
a flange mountable to a top surface of the fuel tank;
a fuel inlet pipe that passes through the flange;
a reservoir residing proximate a bottom interior surface of the fuel tank;
a fuel diffuser attached to the fuel inlet pipe and protruding into an interior volume of the reservoir; and
a fuel cylinder surrounding more than half of a longitudinal length of the fuel diffuser, the fuel cylinder protruding into an interior volume of the reservoir, the fuel cylinder defining a plurality of apertures at a first end of said fuel cylinder and an open end at a second end of the fuel cylinder opposite the first end.
17. The fuel pump module according to claim 16 , wherein:
the fuel diffuser defines a plurality of holes to permit fuel to pass from an inside of the diffuser to an outside of the fuel diffuser, the fuel diffuser and the reservoir bottom define a gap therebetween, and the the plurality of apertures extend through a sidewall of the fuel cylinder.