| 摘要 |
An evaporative fuel control system for an internal combustion engine having a canister that absorbs evaporative fuel generated in the fuel tank. An atmosphere open passage connects the canister with the atmosphere. A purge valve is disposed between the intake passage and the canister. A purge controller controls the purge valve so that the evaporative fuel absorbed by the canister is purged and supplied to the intake passage. A leak check system examines leakage in the evaporative fuel control system by causing negative pressure in the evaporative fuel control system during stop of the engine. The leak check system includes a factory test mode which is provided with a decreased leak check time which is shorter than that for normal leak check when the evaporative fuel control system receives a factory test signal.
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