| 摘要 |
A fuel system (10) includes a fuel tank (14), a fill head (16), a vapor canister (18), and a valve assembly (12). The fill head (16) is in fluid communication with the fuel tank (14). Fluid (F) flows from the fill head (16) to the fuel tank (14). The vapor canister (18) is configured for absorbing vapor (V) therein. A recirculation line (26) is configured to fluidly extend between the fuel tank (14) and the fill head (16). A vapor line (28) is configured to fluidly extend between the fuel tank (14) and the vapor canister (18). The valve assembly (12) is operatively disposed along the vapor line (28) or the recirculation line (26). The valve assembly (12) includes a filter (36) having a membrane (44) formed from a micro-porous element that is fluid impermeable and vapor permeable. Fluid (F) is prevented from flowing through the membrane (44) and into the vapor canister (18) while allowing vapor (V) to flow through the membrane (44) and into the vapor canister (18). |
