| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cut-off valve which properly ventilate inside a fuel tank in a filled-up tank, and does not feed more fuel than required.SOLUTION: A fuel shut-off valve includes: a case having a first opening communicated with the inside of a fuel tank and a second opening communicated with a canister; a lower float that is provided so as to move up and down inside the case and has a first valve member above the lower float; an upper float that is provided so as to move up and down above an upper part of the lower float, and has a second valve member and a third opening communicated with the canister; a first valve seat provided on the upper float, on which the first valve member abuts to close off the third opening; a second valve seat provided near the second opening, on which the second valve member abuts to close off the second opening. The case includes: the lower and upper floats for opening and closing a cave hole; and the third valve member separately formed. The third valve member includes a spring, moves upward with a spring force of the spring when the lower float moves upward so as to close up the cave hole or reduce the opening area thereof. |
