Kontrolle der Belüftung des Brandstofftanks während der Betankung

摘要

A fuel tank vapor vent system for a motor vehicle having a float operated vent valve in the tank top for permitting fuel vapor flow through a vapor conduit to a remote storage canister. A filler nozzle seal (32) in the tank filler neck (24) seals about the nozzle during refueling. A recirculation line (50) is connected to the filler neck below the nozzle seal and also to the vapor conduit to the canister. Fuel flow in the filler neck during refueling effects recirculation of some of the vapor flowing to the canister and minimizes the size of canister required.