| 摘要 |
PROBLEM TO BE SOLVED: To enable pressure bleeding control for a fuel tank to be carried out accurately and at the same time prevent its control from becoming complicated.SOLUTION: An evaporation fuel treatment device of this invention comprises a canister 22 including adsorbent for use in adsorbing evaporated fuel generated in a fuel tank 15; a seal valve 40 arranged in a vapor passage 24 for use in connecting the canister 22 with the fuel tank 15; and a purge passage 26 for use in connecting the canister 22 with an intake passage 16 of an engine 14. The seal valve 40 adjusts a flow rate of gas flowing in the vapor passage 24 by changing a stroke amount that corresponds to an axial distance of a valve movable portion in respect to a valve seat so as to perform pressure bleeding for the fuel tank 15. This pressure bleeding control for the fuel tank is performed to feed-back control of a stroke amount of the seal valve 40 in such a way that a deflection between a desired tank inner pressure of the fuel tank 15 and an actual tank inner pressure may become small. |
