| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide: an EGR system capable of efficiently evaporating condensate water generated by cooling moisture in exhaust gas led to an EGR passage of an internal combustion engine with an EGR cooler, with the heat of the exhaust gas by using supercharging pressure; and a controlling method of the EGR system. Ž<P>SOLUTION: In the EGR system 1 of the internal combustion engine 10 with a turbocharger equipped with the EGR cooler 20, a condensate water collecting portion 22 provided between a downstream side of the EGR cooler 20 of the EGR passage 19 and an EGR valve 21, and an exhaust passage 15 are connected by a condensate water discharging passage 23. A bypass opening/closing valve 27 is provided on a high-pressure gas bypass passage 26 provided so as to connect an upstream side of a turbine 13b of the turbocharger 13 in the exhaust passage 15, the downstream side of the EGR cooler 20 of the EGR passage 19, and the condensation water collecting portion 22. The bypass opening/closing valve 27 is controlled to temporally open before the supercharging pressure P5 is increased and a waste gate valve 13c of the turbocharger is controlled to open. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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