A VENT DEVICE FOR A FUEL SUPPLY PIPE

摘要

A vent arrangement for a fuel filler pipe (11) for motor vehicles. The arrangement comprises a vent passage (12) between a fuel tank's (10) upper part and the upper part of the fuel filler pipe (11). The passage comprises a chamber (16), the volume of which exceeds the fuel volume which can be forced upwards in the passage during filling. The chamber (16) is formed as a widening of the passage (12) which beneath the chamber forms a combined riser and vent tube (12a) in relation to the fuel tank (10). The passage above the chamber forms a vent tube (12b). The combined riser and vent tube (12a) has its orifice a small way inside the chamber (16). The tube presents a drainage hole (18) proximate the inside of the chamber wall.