| 摘要 |
PROBLEM TO BE SOLVED: To prevent sealability from getting worse in a gas filling port. SOLUTION: A filling cap is removed and a gas filling gun 44 is inserted into an inlet pipe 10 when fuel is filled. A protrusion 42 of a valve system 30 is projected toward an outside of the filing port in a substantially central part of the valve system 30 not to make a tip 44A of the gun 44 interfere with a gasket of the valve system 30 when the gun 44 is inserted. That is, a height H from a gasket 32 of the protrusion 42 and a diameter R thereof are set at values only brought into contact with the protrusion 42 in the tip 44A of the protrusion 42 and not to interfere with the gasket 32 of the valve system 30 when the gun 44 is inserted. Resultingly, the gasket 32 is prevented from being abraided or deformed by the interference with the tip 44A of the gun 44. |
