| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaporated fuel treatment device capable of providing stable engine operating state by avoiding such a situation that evaporated fuel in a fuel tank is directly purged to an engine intake system even when a canister system is operated while an engine is operated. SOLUTION: In an enclosed type canister system 1, when either of the requirements of such operations that the electric pump of a pump module 17 for OBD is forcibly operated, the changeover valve of the pump module 17 for OBD is forcibly turned on, and a blocking valve 16a is forcibly opened is satisfied, a purge VSV 14a is forcibly closed even if a prescribed requirement of purging is satisfied to avoid that the evaporated fuel in the fuel tank 3 is purged directly to the engine intake system. COPYRIGHT: (C)2006,JPO&NCIPI
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