| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology which prevents sound squeak occurring in a breather valve and a passage, reduces a burden to an environment and costs in a fuel cap including a breather valve.SOLUTION: A fuel cap with a breather mechanism is a cap 60 which closes an oil supply port 16a of a fuel tank 16 so that the oil supply port 16a may open and close and includes a breather passage 80 allowing the interior of the fuel tank 16 to communicate with the exterior. The breather passage 80 includes: a breather valve mechanism 120; and a resonator chamber 81 serving as a sound attenuation mechanism. The breather mechanism 120 is a valve having a spring 111 that maintains a pressure in the fuel tank 16 at a predetermined pressure. |
