Futaba Industrial Co., Ltd.

Tamami Ina

Koji Iwamoto

Masahito Hosoi

Takuya Nakagawa

Ayumi Oba

Provided is an evaporated fuel treatment device including a first coupling portion, a second coupling portion, a first accommodating portion and a second accommodating portion. The first accommodating portion is configured to be disposed so as to be in communication with the first coupling portion and the second coupling portion, and to accommodate a first adsorbent. The second accommodating portion is configured to be disposed so as to be in communication with the first coupling portion via the first accommodating portion, and to accommodate a second adsorbent. The evaporated fuel adsorption capacity of the first adsorbent is lower than the evaporated fuel adsorption capacity of the second adsorbent.

Evaporated fuel treatment device

Provided is a unit attachment structure. The unit attachment structure includes a case and a unit to be inserted into the case. The case includes an opening, paired slits, and a first engagement portion. The unit includes a projection projecting from a facing surface of the unit, and a second engagement portion. At least one of one slit of the paired slits or the projection includes a slanting surface formed along a circumferential direction.

Unit attachment structure

Provided is a canister that makes it possible to reduce production costs. One aspect of the present disclosure is a canister. The canister includes an outer case including a charge port that takes in an evaporated fuel, a purge port that discharges the evaporated fuel, and an atmosphere port open to the atmosphere, an inner case arranged inside the outer case, the inner case having an inner space to which the atmosphere port is connected, a first adsorption chamber arranged in the inner space of the inner case, and a second adsorption chamber arranged between the first adsorption chamber and the atmosphere port in a flow path of the evaporated fuel in the inner space of the inner case. A cross-sectional area perpendicular to a gas flow direction in the second adsorption chamber and a cross-sectional area perpendicular to a gas flow direction in the first adsorption chamber are different.

Canister

Provided is an evaporated fuel treatment device configured to adsorb and desorb an evaporated fuel originating in a fuel tank. A first adsorption chamber is arranged in a flow passage. A second adsorption chamber is connected to the first adsorption chamber, and is arranged, in the flow passage, closer to an atmosphere port with respect to the first adsorption chamber. A first adsorption layer is arranged within the first adsorption chamber, and adsorbs the evaporated fuel. A second adsorption layer is arranged within the second adsorption chamber, and adsorbs the evaporated fuel. A sectional area of the second adsorption layer perpendicular to a direction in which the evaporated fuel flows through the second adsorption layer being larger than a sectional area of the first adsorption layer perpendicular to a direction in which the evaporated fuel flows through the first adsorption layer.

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Okazaki, Japan

Tamami Ina