| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaporated-fuel treatment device having temperature change suppression effect at a time of absorption and desorption. SOLUTION: In the evaporated-fuel treatment device of which flow passage in a casing 2 includes a plurality of filled chambers 8, 9, 10 filled with activated carbon 11 absorbing and desorbing evaporated fuel and connecting passages 15, 16 positioned between filled chambers adjoining in a flow passage direction and not filled with activated carbon 11, which is provided with a purge port 12 connected to an intake system and a charge port 13 connected to a fuel tank on one end side of the flow passage and is provided with an atmospheric air port 14 communicating to atmospheric air on another end side, ribs 36, 34 are provided on an inner wall surface of the connecting passages 15, 16 which is not filled with activated carbon 11. Consequently, temperature change of evaporated-fuel can be suppressed by the connecting passages 15, 16 and absorption efficiency and desorption efficiency of activated carbon 11 are effectively displayed. COPYRIGHT: (C)2007,JPO&INPIT
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