| 摘要 |
PROBLEM TO BE SOLVED: To detect purge air amount without using an exclusive air flow meter, regarding an evaporated fuel processing device for processing evaporated fuel generated within a fuel tank by purging. SOLUTION: This device is provided with a canister for adsorbing fuel vapor generated within the fuel tank and a purge control valve arranged between the canister and an intake passage. Flow rate QPG of purge gas flowing in the purge control valve is determined (step 192 and 194). A fuel injection quantity correction coefficient FGPG is determined to prevent an air-fuel ratio deviation caused by purge gas. Based on the fuel injection quantity correction coefficient FGPG, a fresh air ratio PGFRSH showing the ratio of purge air in purge gas is determined (step 196). Based on purge gas flow rate QPG and the fresh air-ratio PGFRSH, purge air amount QPG×PGFRSH is determined. The value is integrated to determine integrated purge air amount SUMQPG (step 198).
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