Filler neck closure with drainage system

A fuel tank filler apparatus comprises

• a fill tube formed to include an outer chamber adapted to receive a fuel-dispensing nozzle during a tank-refueling activity and a fuel-conducting passageway coupled in fluid communication to the outer chamber and adapted to conduct fuel dispensed by the fuel-dispensing nozzle to a fuel tank associated with the fill tube, the fill tube being formed to include a nozzle-receiving aperture that is located to interconnect the outer chamber in fluid communication with the fuel-conducting passageway, the fill tube also being formed to include a drain to conduct collected liquid extant in the outer chamber to surroundings outside of the fill tube,
• a nozzle-actuated inner flapper door mounted on the fill tube for movement relative to the fill tube to open and close the nozzle-receiving aperture, and
• a drain controller including a drainage plug mounted for movement from a drain-opening position to a drain-closing position to close the drain to block flow of liquid from the outer chamber through the drain in response to movement of the inner flapper door to the opened position,
• wherein the fill tube includes a fuel-tank filler neck adapted to be coupled at an inner end thereof to a fuel tank and a filler neck closure coupled to an opposite outer end of the fuel-tank filler neck, the filler neck closure includes a nozzle-insertion housing formed to include the outer chamber and the nozzle-receiving aperture and mated to the opposite outer end of the fuel-tank filler neck, and the nozzle-insertion housing is formed to include the drain,
• wherein the nozzle-insertion housing is formed to include a drainage conduit that is configured to drain any liquid extant in the outer chamber toward surroundings outside of the nozzle-insertion housing and an inlet end of the drainage conduit communicates with the outer chamber and any collected liquid therein,
• wherein the fuel-tank filler neck is formed to include a drainage hole aligned with an outlet end of the drainage conduit formed in the nozzle-insertion housing to cause the drainage hole to cooperate with the drainage conduit to define the drain formed in the fill tube, and
• wherein the nozzle-insertion housing is formed to include an inclined plug-motion channel that is arranged to communicate with the drainage conduit and the filler neck closure further includes a drainage plug mounted for movement in the inclined plug-motion channel formed in the nozzle-insertion housing between a conduit-closing position blocking flow of collected liquid from the outer chamber through the drainage conduit to an outlet end of the drainage conduit and a conduit-opening position allowing flow of collected liquid from the outer chamber through the drainage conduit to the outlet end so that any collected liquid extant in the outer chamber can drain to surroundings through the drainage conduit.