Molded Adsorbents and Canisters Containing the Molded Adsorbents
First Claim
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1. A molded adsorbent for adsorbing and desorbing a fuel vapor, comprising:
- a solid or hollow columnar shaped body with a longitudinal axis and axially opposite end surfaces; and
wherein at least one of the axially opposite end surfaces includes an inclined cut surface portion oriented at an acute angle relative to the longitudinal axis, a concave cut surface portion, or a convex cut surface portion.
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Abstract
A molded adsorbent for adsorbing and desorbing fuel vapor includes a solid or hollow columnar shaped body. At least one of the axially opposite end surfaces of the molded adsorbent includes an inclined cut surface portion oriented at an acute angle relative to the longitudinal axis, a concave cut surface portion, or a convex cut surface portion.
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Citations
20 Claims
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1. A molded adsorbent for adsorbing and desorbing a fuel vapor, comprising:
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a solid or hollow columnar shaped body with a longitudinal axis and axially opposite end surfaces; and wherein at least one of the axially opposite end surfaces includes an inclined cut surface portion oriented at an acute angle relative to the longitudinal axis, a concave cut surface portion, or a convex cut surface portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A canister, comprising:
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a tank port configured to communicate with a fuel tank; a purge port configured to communicate with an internal combustion engine; an atmosphere port configured to communicate with atmosphere; a first adsorption chamber containing a first adsorbent and communicating with the tank port and the purge port; and a second adsorption chamber containing a second adsorbent and positioned between the first adsorption chamber and the atmosphere port with respect to a flow of fuel vapor from the tank port to the atmosphere port;
whereineach of the first adsorbent and the second adsorbent is configured to adsorb and desorb the fuel vapor; the second adsorbent comprises a plurality of molded adsorbents each having a solid or hollow columnar shaped body with a longitudinal axis and axially opposite end surfaces; and at least one of the axially opposite end surfaces includes an inclined cut surface portion oriented at an acute angle relative to the longitudinal axis, a concave cut surface portion, or a convex cut surface portion. - View Dependent Claims (12, 13, 14, 15, 16, 18, 19, 20)
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17. The canister according to claim 17, wherein the concave cut surface portion or the convex cut surface portion of each of the molded adsorbents includes a plurality of stepped portions arranged in a diametrical direction of the molded adsorbent.
Specification