Aisan Kogyo Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Ryuji Kosugi

Tomonari Toki

Takanori Akiyama

Katsuhiko Makino

Junya Kimoto

Shinji Shimokawa

Hiroshi Takamatsu

Masamitsu Hayakawa

Masataka Suzuki

Tsuneyuki Yokochi

Kenji Seki

Hiroyuki Takahashi

Masahide Kobayashi

Yuusaku Nishimura

Takashi Mani

Kazusato Kasuya

Katsuyuki Kido

Shinsuke Kiyomiya

Tsuneyuki Kurata

Norihisa Yamamoto

Akihito Kuno

Tsutomu Kuniyoshi

Shota Yamanaka

Masakazu Hasegawa

Yasunori Yamada

A canister includes a main casing, a first port formed in a wall of the main casing, and a first adsorbent section within the main casing. The first adsorbent section and the wall of the main casing define a space section therebetween. The first adsorbent section includes a first adsorbent and a first retainer holding the first adsorbent. The canister also includes a first elastic element disposed in the space section. The first elastic element urges the first retainer to elastically hold the first adsorbent. In addition, the canister includes a subcasing integral to the wall of the main casing. The subcasing is positioned within the space section. Further, the canister includes a second adsorbent section in communication with the first port. The second adsorbent section includes a second adsorbent disposed within the subcasing. Still further, the canister includes a second retainer holding the second adsorbent.

Canister

A canister for an evaporated fuel processing device is proposed, and the canister may include: a casing including an atmospheric port, a tank port, and a purge port; a first adsorbent housed in the casing, facing the atmospheric port; a second adsorbent housed in the casing and facing the tank port and the purge port, and separated from the first adsorbent by a space; a second passage communicating the atmospheric port and the space and bypassing a first passage which extends from the atmospheric port through the first adsorbent to the space; and a switching valve configured to switch opening and closing of the second passage.

Canister for evaporated fuel processing device

A fuel vapor processing apparatus may include a first adsorption chamber, a second adsorption chamber and a third adsorption chamber that are arranged in series with respect to a flow of gas. A ratio of a length to a diameter of the second adsorption chamber may be larger than a ratio of a length to a diameter of the first adsorption chamber. A filling ratio of an adsorbent within the second adsorption chamber may be smaller than a filling ratio of an adsorbent within the first adsorption chamber.

Fuel vapor processing apparatus

A fuel vapor processing apparatus may include a first adsorption chamber, a second adsorption chamber and a third adsorption chamber that are connected in series with respect to a flow of gas. A ratio of a length to a diameter of the second adsorption chamber may be larger than that of the first adsorption chamber. A cross sectional area of each of the second and third adsorption chambers may be smaller than a cross sectional area of the first adsorption chamber.

An evaporation fuel processing device is provide including: a passage; a tank port and a purge port on one end side of the passage; an atmospheric air port on the other end side of the passage; and adsorbent layers filled with adsorbent for evaporation fuel components, provided in the passage; a region provided on an atmospheric air port side of the passage, being constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, in which a volume of the adsorbent layer is smaller in the adsorbent layer closer to the atmospheric air port, a volume of the separating part is larger closer to the atmospheric air port, and the volume of the separating part located farthest on a tank port side is larger than that of the adsorbent layer located farthest on the atmospheric air port side.

Evaporation fuel processing device

The present invention provides an evaporation fuel processing device including: a passage formed inside so as to allow a fluid to flow through the passage; a tank port and a purge port formed on one end side of the passage; an atmospheric air port formed on the other end side of the passage; and adsorbent layers filled with adsorbent which can adsorb evaporation fuel components, the adsorbent layers being provided in the passage, wherein a region which is constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, and in which a total volume of the adsorbent layers is set smaller than a total volume of the separating parts, is provided on an atmospheric air port side of the passage.

A fuel vapor processing apparatus may include a case defining therein a first adsorption chamber, a second adsorption chamber and a non-adsorption chamber communicating between the first adsorption chamber and the second adsorption chamber. The cross sectional flow area of the first adsorption chamber may be smaller than the cross sectional flow area of the second adsorption chamber.

A fuel vapor processing apparatus may include a first canister and a second canister each having an adsorbent disposed therein. The second canister may include a first passage and a second passage each communicating between the first canister and an atmosphere. The first passage may be configured as an adsorption passage having the adsorbent disposed therein. The second passage may be configured as an air passage through which air flows. A control device may control flow of the air through the air passage. A heating device may heat the air flowing through the air passage. The air passage may be arranged so that the adsorbent of the adsorption chamber is heated by heat of the air that is heated by the heating device and flows through the air passage.

Embodiments of the invention are directed towards a trap canister for adsorbing fuel vapor contained in breakthrough gas discharged from a main adsorbent canister. The main adsorbent canister is connected to a fuel tank has a case defining an adsorption chamber therein and an adsorbent filled in the adsorption chamber. The case has a first end open to the atmosphere and a second end for introducing breakthrough gas into the adsorption chamber. The adsorbent filled in the adsorption chamber adsorbs the fuel vapor contained in the breakthrough gas. The trap canister further has a bypass path for bypassing the adsorption chamber and a valve configured to block the bypass path and to allow for opening during refueling. This prevents the fuel vapor from flowing into the atmosphere during normal operation while also decreasing pressure loss during refueling.

Trap canister for adsorbing fuel vapor

The present invention includes a fuel vapor processing apparatus including a communication passage connecting between a first space and a second space each containing an adsorption material capable of adsorbing fuel vapor. The communication passage includes a dissipation delaying space capable of delaying dissipation or transmission of the fuel vapor between the first and second spaces. The communication passage further includes throttles positioned to oppose to each other across the dissipation delaying space.

One aspect according to the present invention includes a fuel vapor processing apparatus including an insert. The insert can determine an effective flow passage area of the adsorption material chamber without producing a non-filled region of an adsorption material, through which fuel vapor containing gas flows.

One aspect according to the present invention includes a fuel vapor processing apparatus having a case containing a mixture of an adsorption material and a heat storage material therein. A mixing ratio of the heat storage material to the adsorption material is set to be higher for a central area away from a circumferential wall of the case or a flow passage defined in the case than for an outer peripheral area close to the circumferential wall.

The present invention includes a canister having a housing for receiving therein an adsorption material and a heat storage material. The adsorption material can adsorb a fuel vapor. The heat storage material can absorb and dissipate a heat in response to change in temperature within the housing. The heat storage material includes a plurality of heat storage granules each having a cover layer made of an alcohol resistance material.

Canisters

A canister, for inhibiting a diffusion phenomenon in an adsorbent layer as much as possible and certainly adsorbing fed evaporated fuel to inhibit blow-by of the evaporated fuel into the atmosphere, is constituted by filling a first adsorbent layer of the canister with activated carbon A having a large evaporated fuel adsorption and a weak holding power, and filling a second and a third adsorbent layers with activated carbon B having an intermediate evaporated fuel adsorption and a weak holding power and therefore having characteristics that the residual amount of the low boiling point components in the evaporated fuel after purge is small, whereby after the high temperature standing of the canister, the discharge of the evaporated fuel into the atmosphere can be inhibited.

The present invention includes a canister including an adsorption chamber. An adsorption material and a heat storage material are disposed within the adsorption chamber. The heat storage material is molded from a mixture of a plurality of microcapsules and a binder. Each of the microcapsules contains therein a heat-change material. The heat storage material is prevented from moving relative to the chamber wall of the adsorption chamber in at least one of two directions perpendicular to each other.

Growing community of inventors

Obu, Japan

Ryuji Kosugi