Back to results
US 9,283,513 B2Granted
Fuel vapor treatment device
AssigneeMahle Filter Systems Japan Corporation
InventorsJunpei Omichi, Hiroyuki Yoshida
Life of this patent
Estimating the term…
Abstract
A fuel vapor treatment device including a casing including a gas passage formed in the casing, a granular adsorbent filled in the gas passage, the granular adsorbent serving to adsorb and desorb fuel vapor, and a desorption promoting structure to promote desorption of the fuel vapor in a central portion of a cross-sectional area of the gas passage as compared to an outer peripheral portion of the cross-sectional area of the gas passage.
Claims4
A fuel vapor treatment device comprising:
- a casing comprising a gas passage formed in the casing;
- a granular adsorbent filled in the gas passage, the granular adsorbent serving to adsorb and desorb fuel vapor;
- and
- a desorption promoting structure to promote desorption of the fuel vapor in a central portion of a cross-sectional area of the gas passage as compared to an outer peripheral portion of the cross-sectional area of the gas passage,
- wherein the desorption promoting structure comprises a first granular adsorbent filled in the central portion of the cross-sectional area of the gas passage and a second granular adsorbent filled in the outer peripheral portion of the cross-sectional area of the gas passage, the first granular adsorbent having a grain size larger than a grain size of the second granular adsorbent.
2 more elements
Dependencies are inferred from the claim text.