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US 8,617,299 B2Granted
Fuel vapor processing canister
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsMasakazu Hasegawa, Masahiro Sugiura
Life of this patent
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Abstract
A canister includes a first fuel vapor adsorption device and a second fuel vapor adsorption device. The second fuel vapor adsorption device can adsorb a part of fuel vapor that still remains in a gas after desorption by the first fuel vapor adsorption device. The second fuel vapor adsorption device includes a first passage containing a fuel vapor adsorption material and a second passage containing no fuel vapor adsorption material. The first passage and the second passage allow the gas to flow therethrough. A gas introduction device allows the fuel vapor to flow from the second passage into the first passage.
Claims17
A canister comprising:
- a case having a tank port communicating with an upper gaseous-phase space within a fuel tank, a purge port communicating with an intake air passage of an engine, and an atmospheric port communicating with an atmosphere, wherein:
- the case further includes:
- an adsorption material chamber communicating between the tank port and the purge port and storing a first adsorption material therein, the first adsorption material being capable of adsorbing fuel vapor and allowing the fuel vapor from being desorbed,
- an atmospheric communication chamber communicating between the atmospheric port and the adsorption material chamber, so that air can flow through the atmospheric communication chamber in an air flowing direction;
- and
- a partitioning member disposed within the atmospheric communication chamber and extending along the air flowing direction, so that the atmospheric communication chamber is divided into an air flow passage and an adsorption material passage;
- wherein the partitioning member has a tubular shape and includes a plurality of gas passage holes dispersively formed in the partitioning member and extending therethrough in a diametrical direction to allow passage of gas-through the partitioning member in a direction intersecting with the air flowing direction, and
- wherein the air flow passage and the adsorption material passage are defined on a radially inner side and a radially outer side of the partitioning member, respectively;
- wherein the air flow passage allows passage of air therethrough;
- wherein the adsorption material passage has a second adsorption material stored therein;
- and
- wherein the second adsorption material can adsorb fuel vapor and allow desorption of the fuel vapor;
- wherein the air flow passage and the adsorption material passage are arranged parallel to each other with respect to the air flowing direction.
10 more elements
A canister comprising:
- a first fuel vapor adsorption device capable of adsorbing fuel vapor contained in a gas;
- and
- a second fuel vapor adsorption device communicating with the first fuel adsorption device and capable of adsorbing a part of the fuel vapor that still remains in the gas after desorption by the first fuel vapor adsorption device,
- wherein the second fuel vapor adsorption device includes:
- a first passage containing a fuel vapor adsorption material;
- a second passage containing no fuel vapor adsorption material:
- wherein the first passage and the second passage allowing the gas to flow therethrough independently of each other;
- and a fuel vapor introduction device allowing the fuel vapor to flow from the second passage into the first passage;
- wherein the fuel vapor introduction device comprises a partitioning member having a tubular shape and including a plurality of gas passage holes dispersively formed in the partitioning member and extending therethrough in a diametrical direction to allow passage of gas through the partitioning member in a direction intersecting with the air flowing direction,
- wherein the first passage and the second passage are defined on a radially inner side and a radially outer side of the partitioning member, respectively, and are arranged parallel to each other with respect to a direction of flow of the gas;
- and
- wherein the partitioning member is configured to allow at least a part of fuel vapor contained in the gas to flow from the second passage into the first passage during the flow of the gas through the second passage.
9 more elements
A canister comprising:
- a fuel vapor adsorption device capable of adsorbing fuel vapor contained in a fuel vapor containing gas,
- wherein the second fuel vapor adsorption device includes:
- a first passage containing a fuel, vapor adsorption material;
- a second passage containing no fuel vapor adsorption material:
- wherein the first passage and the second passage allowing the gas to flow therethrough independently of each other;
- and a fuel vapor introduction device allowing the fuel vapor to flow from the second passage into the first passage;
- wherein the fuel vapor introduction device is configured to allow at least a part of fuel vapor contained in the gas to flow from the second passage into the first passage during the flow of the gas through the second passage;
- wherein the fuel vapor introduction device comprises a tubular member including a plurality of gas passage holes dispersively formed in the tubular member and extending therethrough in the diametrical direction to allow passage of gas through the tubular member in a direction intersecting with the air flowing direction, and
- wherein the first passage and the second passage are defined on a radially inner side and a radially outer side of the tubular member, respectively.
6 more elements
Dependencies are inferred from the claim text.