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A fuel adsorption layer formed in a canister is partitioned into an upper adsorption layer and a lower adsorption layer by a partition plate in which a heater is embedded. The relation between a heating value of the heater and thickness X of the upper and lower adsorption layers is set so that the t

A fuel adsorption layer formed in a canister is partitioned into an upper adsorption layer and a lower adsorption layer by a partition plate in which a heater is embedded. The relation between a heating value of the heater and thickness X of the upper and lower adsorption layers is set so that the temperature of a part closest to the heater heating face of the fuel adsorption layer is lower than a fire point of the fuel, and the temperature of a part farthest from the heater heating face is higher than the boiling point of the fuel. With the configuration, by heating the fuel adsorption layer by the heater, the desorption performance of activated carbon is improved, and almost all of the fuel vapors adsorbed can be desorbed.

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A fuel adsorption layer formed in a canister is partitioned into an upper adsorption layer and a lower adsorption layer by a partition plate in which a heater is embedded. The relation between a heating value of the heater and thickness X of the upper and lower adsorption layers is set so that the t

A fuel adsorption layer formed in a canister is partitioned into an upper adsorption layer and a lower adsorption layer by a partition plate in which a heater is embedded. The relation between a heating value of the heater and thickness X of the upper and lower adsorption layers is set so that the temperature of a part closest to the heater heating face of the fuel adsorption layer is lower than a fire point of the fuel, and the temperature of a part farthest from the heater heating face is higher than the boiling point of the fuel. With the configuration, by heating the fuel adsorption layer by the heater, the desorption performance of activated carbon is improved, and almost all of the fuel vapors adsorbed can be desorbed. 34, pp. 3488-3495 (1995). Lin, H.-B. et al., "Synthesis, surface, and cell-adhesion properties of polyurethanes containg covalently grafted RGD-peptides," J. Biomed. Mater. Res., vol. 28, pp. 329-342 (1994). Lyman, D.J. et al., "The effect of chemical structure and surface properties of polymers on the coagulation of blood. I. Surface free energy effects," Transact. Am. Soc. Artific. Intern. Organs., vol. XI, pp. 301-306 (1965). Marinkovich, M.P. et al., "The dermal-epidermal junction of human skin contains a novel laminin variant," J.Cell Biol., vol. 119, pp. 696-703 (1992). Massia, S.P. et al., "An RGD Spacing of 440 nm is sufficient for integrin αvβ3-mediated fibroblast spreading and 140 nm for focal contact and stress fiber formation," J. Cell. Biol., vol. 12, pp. 1089-1100 (1991). Massia, S.P.