| 摘要 |
PURPOSE:To prevent the discharge of vapor by installing sealing members at two positions of a fuel cap body and installing a communication pipe which communicates to a canister for absorbing vapor in a fuel tank onto the inner wall of an oil feeding port for the both sealing members. CONSTITUTION:When fuel is supplied into a fuel tank 1, screw parts 14a and 14b are loosened for demounting a fuel cap 3. Then, a gap is formed between the sealing member 9 of the cap 3 and the seal receiving member 11 of an oil feeding port 2, and the vapor in the fuel tank 1 is introduced into a communication pipe 5 through a space part 7, and adsorbed onto a canister 6, and the vapor pressure lowers. During this time, an O-ring 8 continues sealing operation, and the vapor is prevented from being discharged outside. When an oil feeding nozzle 13 is inserted into the oil feeding port 2, and oil is supplied, the vapor generated in the supply of oil passes through a vent pipe 4 and is adsorbed onto the canister 6, passing through the communication pipe 5 from the gap between the nozzle 13 and the seal receiving member 11. |
