| 摘要 |
PROBLEM TO BE SOLVED: To enable the canister-purge to be performed even during supercharging and the purge air flow rate to be controlled with high accuracy. SOLUTION: A purge passage 14 is connected to the upstream of a compressor 2 for an exhaust turbosupercharger, while a purge control valve 17 and a motor-operated pump 18 are installed in the midway of the purge passage 14. Then, while a fixed driving current is given to the motor-operated pump 18, the opening of the purge control valve 17 is controlled in response to the required purge air flow rate, or the purge control valve 17 is controlled so as to be fully opened, and the driving current to the pump 18 is controlled in response to the required purge air flow rate.
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