Vent arrangement for fuel filler pipes

摘要

PCT No. PCT/SE92/00893 Sec. 371 Date Aug. 12, 1994 Sec. 102(e) Date Aug. 12, 1994 PCT Filed Dec. 18, 1992 PCT Pub. No. WO93/11958 PCT Pub. Date Jun. 24, 1993A 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.