Patent ID: 11867140
Assignee: DELPHI TECHNOLOGIES IP LIMITED
Field: Chemical engineering (Chemistry)
Classification: CPC F  B | IPC B  F

Claim 10:
11. A fuel vapor storage canister for adsorbing fuel evaporated in a fuel tank of an automotive vehicle, the fuel vapor storage canister comprising:
a casing forming a main body defining at least one chamber therein;
a vent port in the main body, the vent port being open to atmosphere;
a purge port in the main body, the purge port being on an opposite end of the main body than the vent port, and the purge port being in fluid communication with an air intake system of the vehicle;
the at least one chamber having a cross-sectional area that varies in a direction from the vent port to the purge port; and
the at least one chamber including a bed of first adsorbent material and a bed of second adsorbent material, the first adsorbent material having a flow restriction that is lower than the flow restriction of the second adsorbent material;
wherein the bed of first adsorbent material is disposed at or directly adjacent to a transition zone of changing cross-sectional area of the at least one chamber in the direction from the vent port to the purge port, and the bed of first adsorbent material is disposed adjacent to and immediately upstream from the bed of second adsorbent material in said direction.