| 摘要 |
A purge passage is communicated to the upstream side of a compressor of a turbosupercharger, and on the other hand, a purge control valve and an electrically powered pump are mounted in the middle of said purge passage. Then, either a constant drive current is provided to said electrically powered pump, and the opening of the purge control valve is controlled in correspondence to the requested purged air flow rate, or the purge control valve is controlled to be fully opened, and the drive current of said pump is controlled in correspondence to the requested purged air flow rate.
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