Honda Motor Co., Ltd.

Takeshi Uemae

Shinji Kobayashi

Kiyoshi Katagiri

Takeshi Shimura

Takuma Koishikawa

Ikuo Hara

Tomohiko Sasaki

Satoshi Okayama

Yoji Fukui

Hideaki Haraguchi

Nobuyuki Kurogi

Takashi Toriki

Takumi Sakamoto

In a fuel cap provided with a breather mechanism, a cap openably and closably covers a fuel filler of a fuel tank. The cap includes a breather passage for communication between the inside and the outside of the fuel tank. The breather passage is provided with a breather valve mechanism and a resonator chamber as a silencing mechanism. The breather mechanism is a valve having a spring capable of retaining a pressure within the fuel tank up to a predetermined pressure.

Fuel cap provided with breather mechanism

An evaporated fuel treatment device is provided to treat evaporated fuel by using a fuel supply cap with a small size while the flowout of fuel can also be suitably prevented. The evaporated fuel treatment device includes a positive pressure adjusting valve which opens when an inner pressure of a fuel tank becomes a predetermined pressure or more, and a spherical rollover valve which closes the positive pressure adjusting valve when the fuel tank is inclined at an angle equal to or larger than a predetermined angle. The positive pressure adjusting valve and the spherical rollover valve are mounted on one cylindrical portion formed on a fuel supply cap.

Evaporated fuel treatment device for vehicle

Growing community of inventors

Wako, Japan

Takeshi Uemae