Air vent device for fuel tank on vehicle

摘要

An air vent device for a fuel tank on a vehicle, having paired first and second air vent pipes joined to the portions of an upper section of a fuel tank which are spaced from each other in the lateral direction of said vehicle, and a main air vent pipe connected to said paired air vent pipes to communicate the same with the atmospheric air. A connecting point of said three air vent pipes is positioned below at least one of left and right maximum-angled surfaces, which are inclined with respect to the lateral axis of said fuel tank, of a fuel contained therein. A normally-opened float valve adapted to be closed when the fuel reaches the same is provided in said first or second air vent pipe, which is on the side of said connecting point.