| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaporated fuel treatment device in which the residual amount of fuel components of active charcoal is smaller and the blow-by of evaporated fuel components from an atmosphere port to the outside is less, after purge.SOLUTION: In an evaporated fuel treatment device 1, a passage 3 is formed. A tank port 4 and a purge port 5 are formed on one side of the passage 3, and an atmosphere port 6 is formed on the other end side of the passage 3. In the passage 3, absorption layers each filled with adsorbent to adsorb the evaporated fuel components are provided. On the side of the atmosphere port 6 of the passage 3, a region is provided, which consists of at least three adsorption layers 12, 13, 14 and isolation parts 31, 32 for isolating the adjacent adsorption layers from each other, and in which the volume of one of the adsorption layers 12, 13, 14, closer to the atmosphere port 6, is smaller, the volume of one of the isolation parts 31, 32, closer to the atmosphere port 6, is larger, and the volume of the isolation part 31 located closest to the side of the tank port 4 is larger than the volume of the adsorption layer 14 located closest to the side of the atmosphere port 6. |
