A fuel system includes a fuel tank, a fill head, a vapor canister, and a valve assembly. The fill head is in fluid communication with the fuel tank. Fluid flows from the fill head to the fuel tank. The vapor canister is configured for absorbing vapor therein. A recirculation line is configured to fl
A fuel system includes a fuel tank, a fill head, a vapor canister, and a valve assembly. The fill head is in fluid communication with the fuel tank. Fluid flows from the fill head to the fuel tank. The vapor canister is configured for absorbing vapor therein. A recirculation line is configured to fluidly extend between the fuel tank and the fill head. A vapor line is configured to fluidly extend between the fuel tank and the vapor canister. The valve assembly is operatively disposed along the vapor line or the recirculation line. The valve assembly includes a filter having a membrane formed from a micro-porous element that is fluid impermeable and vapor permeable. Fluid is prevented from flowing through the membrane and into the vapor canister while allowing vapor to flow through the membrane and into the vapor canister.
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1. A fuel system configured for filling a fuel tank with a volume of fluid comprising: a fill head in fluid communication with the fuel tank, wherein the fill head is configured such that fluid flows from the fill head to the fuel tank;a vapor canister configured for absorbing vapor therein;a recirc
1. A fuel system configured for filling a fuel tank with a volume of fluid comprising: a fill head in fluid communication with the fuel tank, wherein the fill head is configured such that fluid flows from the fill head to the fuel tank;a vapor canister configured for absorbing vapor therein;a recirculation line configured to fluidly extend between the fuel tank and the fill head;a vapor line configured to fluidly extend between the fuel tank and the vapor canister;a valve assembly operatively disposed along one of the vapor line and the recirculation line such that the valve assembly is disposed external to the fuel tank;wherein the valve assembly includes a housing having an inlet side and an outlet side and defining a vapor passage therein;wherein the valve assembly includes a filter having a membrane that is formed from a micro-porous element;wherein the filter is operatively disposed in the vapor passage and attached to the inlet side of the housing;wherein the membrane includes an interior wall surrounding a fluid chamber;wherein the filter is configured such that fluid and vapor enter the fluid chamber of the membrane from the inlet side and only vapor flows through the membrane into the vapor passage and exits the valve assembly through the outlet side;wherein the fill head defines a vent configured to open to the recirculation line; andwherein the valve assembly is configured to extend along the recirculation line between the vent and the vapor canister to prevent fluid from entering the vapor canister while allowing vapor to flow into the vapor canister. 2. A fuel system, as set forth in claim 1, wherein the filter has a generally cylindrically shaped profile. 3. A fuel system, as set forth in claim 1, wherein the micro-porous element is fluid impermeable and vapor permeable such that fluid is prevented from flowing therethrough and into the vapor canister while allowing vapor to flow therethrough and into the vapor canister. 4. A fuel system, as set forth in claim 1, wherein the filter includes a thickness defined between the interior wall and the exterior wall that is uniform. 5. A fuel system, as set forth in claim 1, wherein the filter includes a thickness defined between the interior wall and the exterior wall that is non-uniform. 6. A fuel system, as set forth in claim 1, wherein the exterior wall has a plurality of undulations that each extend to a peak and a groove defined between each of the undulations. 7. A fuel system, as set forth in claim 6, wherein each of the undulations has a maximum thickness that is defined between the interior wall and the exterior wall at each peak and a minimum thickness that is defined between the interior wall and the exterior wall at each groove. 8. A fuel system, as set forth in claim 7, wherein the undulations include a plurality of discs that radially surround the interior wall in spaced relationship to one another. 9. A fuel system, as set forth in claim 7, wherein the undulations include a plurality of ridges extending linearly along the exterior wall in radially spaced relationship to one another. 10. A fuel system, as set forth in claim 1, wherein the filter includes a cap extending across the fluid chamber in spaced relationship to the inlet side of the filter; wherein the cap is configured to prevent the flow of vapor or fluid therethrough and deflect the vapor such that the vapor only flows radially through the membrane to the outlet side. 11. A fuel system comprising: a fuel tank configured for receiving a volume of fluid;a fill head in fluid communication with the fuel tank, wherein the fill head is configured such that fluid flows from the fill head to the fuel tank;a vapor canister configured for absorbing vapor therein;a recirculation line fluidly extending between the fuel tank and the fill head;a vapor line fluidly extending between the fuel tank and the vapor canister;a valve assembly operatively disposed along one of the vapor line and the recirculation line such that the valve assembly is disposed external to the fuel tank, the valve assembly including;a housing having an inlet side and an outlet side and defining a vapor passage therein;a filter operatively disposed within the vapor passage and attached to the inlet side of the housing;wherein the filter includes a membrane having an interior wall surrounding a fluid chamber and an exterior wall opposing the fluid chamber;wherein the filter is operatively attached to the inlet side such that fluid and vapor are allowed to enter the fluid chamber from the inlet side and only vapor flows through the membrane into the vapor passage and exits the valve assembly through the outlet side;wherein the membrane is formed from a micro-porous element; wherein the interior wall is generally cylindrical;wherein the exterior wall includes a plurality of undulations that each extend to a peak and a groove defined between each of the undulations;wherein the fill head defines a vent in fluid communication with the recirculation line; andwherein the valve assembly fluidly extends along the recirculation line between the vent and the vapor canister to prevent fluid from entering the vapor canister while allowing vapor to flow into the vapor canister. 12. A fuel system, as set forth in claim 11, wherein the filter includes a thickness defined between the interior wall and the exterior wall that is uniform. 13. A fuel system, as set forth in claim 11, wherein the filter includes a thickness defined between the interior wall and the exterior wall that is non-uniform. 14. A fuel system, as set forth in claim 11, wherein each of the undulations has a maximum thickness that is defined between the interior wall and the exterior wall at each peak and a minimum thickness that is defined between the interior wall and the exterior wall at each groove. 15. A fuel system, as set forth in claim 11, wherein the undulations include a plurality of discs that extend in linearly spaced relationship to one another. 16. A fuel system, as set forth in claim 11, wherein the undulations include a plurality ridges that extend in radially spaced relationship to one another. 17. A fuel system, as set forth in claim 11, wherein the micro-porous element is configured to allow the passage of vapor and prevent the passage of liquid from the fluid chamber therethrough to the vapor passage. 18. A fuel system, as set forth in claim 11, wherein the filter includes a cap extending across the fluid chamber in spaced relationship to the inlet side of the filter; and wherein the cap is configured to prevent the flow of vapor or fluid therethrough and deflect the vapor such that the vapor only flows radially through the membrane to the outlet side. 19. A fuel system comprising: a fuel tank configured for receiving a volume of fluid;a fill head in fluid communication with the fuel tank, wherein the fill head is configured such that fluid flows from the fill head to the fuel tank;wherein the fill head defines a vent;a vapor canister configured for absorbing vapor therein;a recirculation line fluidly extending between the fuel tank and the vent of the fill head;a vapor line fluidly extending between the fuel tank and the vapor canister;a valve assembly disposed along the recirculation line, external to the fuel tank, wherein the valve assembly includes: a housing having an inlet side and an outlet side and defining a vapor passage therein;a filter having a membrane that is formed from a micro-porous element;wherein the filter is operatively disposed in the vapor passage and attached to the inlet side of the housing;wherein the membrane includes an interior wall surrounding a fluid chamber and an exterior wall opposing the fluid chamber; andwherein the valve assembly is operatively disposed along the recirculation line such that the vent opens to the inlet side and the outlet side opens to the recirculation line; andwherein the filter is configured such that fluid and vapor enter the fluid chamber of the membrane from the inlet side and only vapor flows through the membrane into the vapor passage and exits the valve assembly to the recirculation line through the outlet side. 20. A fuel system, as set forth in claim 19, wherein the filter includes a thickness defined between the interior wall and the exterior wall that is uniform. 21. A fuel system, as set forth in claim 19, wherein the filter includes a thickness defined between the interior wall and the exterior wall that is non-uniform. 22. A fuel system, as set forth in claim 19, wherein the exterior wall has a plurality of undulations that each extend to a peak and a groove defined between each of the undulations. 23. A fuel system, as set forth in claim 22, wherein each of the undulations has a maximum thickness that is defined between the interior wall and the exterior wall at each peak and a minimum thickness that is defined between the interior wall and the exterior wall at each groove. 24. A fuel system, as set forth in claim 22, wherein the undulations include a plurality of discs that extend in linearly spaced relationship to one another. 25. A fuel system, as set forth in claim 22, wherein the undulations include a plurality ridges that extend in radially spaced relationship to one another. 26. A fuel system, as set forth in claim 19, wherein the micro-porous element is configured to allow the passage of vapor and prevent the passage of liquid from the fluid chamber therethrough to the vapor passage. 27. A fuel system, as set forth in claim 19, wherein the filter includes a cap extending across the fluid chamber in spaced relationship to the inlet side of the filter; and wherein the cap is configured to prevent the flow of vapor or fluid therethrough and deflect the vapor such that the vapor only flows radially through the membrane to the outlet side. 28. A fuel system, as set forth in claim 19, wherein the fill head defines a vent in fluid communication with the recirculation line; and wherein the valve assembly fluidly extends along the recirculation line between the vent and the vapor canister to prevent fluid from entering the vapor canister while allowing vapor to flow into the vapor canister.
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