| 摘要 |
An internal combustion engine (10) includes an EGR system (40). The EGR system (40) is formed of an EGR passage (41) for introducing exhaust gas from an exhaust passage (30) into an intake passage (20) and an EGR valve (42) that is able to vary the flow passage area of exhaust gas in the exhaust passage (30). An electronic control unit (60) estimates whether liquid-phase water is adherent to the EGR valve (42) on the basis of an engine operating state. When the electronic control unit (60) estimates that liquid-phase water is adherent to the EGR valve (42), the electronic control unit (60) forcibly opens and closes the EGR valve (42) to reduce the amount of water adherent to the EGR valve (42) at the time of stop of engine operation. |
