| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaporated-fuel treating device of an internal combustion engine capable of properly preventing a dilution air regulating valve from being seized. SOLUTION: This evaporated-fuel treating device is applied to a multi-cylinder internal combustion engine having intake control valves disposed in their respective intake passages for cylinders, and used for treating the evaporated fuel produced in a fuel tank. Specifically, the evaporated-fuel treating device comprises a purge passage for guiding a purge gas to branch passages through a communication part allowing the branch passages to communicate with each other, a dilute air supply passage for guiding the dilution air for diluting the purge gas, and the dilution air regulating valve for regulating a dilution air quantity supplied into the purge passage. A forced-driving means forcibly openably drives the dilution air regulating valve in an operating area in which no explosion is expected to occur in the internal combustion engine. Consequently, the dilution air regulating valve can be properly prevented from being seized while suppressing a variation in the rotation of the internal combustion engine. COPYRIGHT: (C)2009,JPO&INPIT
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