| 摘要 |
A fill limit vent valve assembly includes a cover assembly, a valve assembly and a fill control system. The fill control system has a primary fuel control window, a secondary fuel control window, a first conduit and a second conduit, the primary and secondary fuel control windows in respective communication with the first and second conduits, the first conduit extending a first distance along the housing and terminating in a first vent aperture, the second conduit extending a second distance along the housing and terminating in a second vent aperture spaced apart from the first vent aperture, the primary fuel control window and the first vent aperture configured to facilitate fuel filling shut-off in a first fuel condition, the secondary fuel control window configured to shut-off fuel filling in a second fuel condition, the second vent aperture configured to provide a fixed amount of fuel vapor venting from the float chamber between the first and second fuel conditions to control entry of a set quantity of a liquid fuel into the fuel tank after the first fuel condition and before the second fuel condition.
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