CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

Provided is a control apparatus of the internal combustion engine capable of removing deposited foreign matters accumulated on an EGR valve without deteriorating a combustion state of the internal combustion engine. When an ECU judges that the vehicle is under deceleration ("YES" in Step S11) and under fuel cut operation ("YES" in Step S12), the ECU allows an EGR shutoff valve to be fully opened (Step S 13) and obtains an intake pressure "Pclose" under the EGR valve in the fully closed state (Step S 14). Then, the ECU allows the EGR valve to be switched to the fully opened state and obtains an intake pressure "Popen" under the EGR valve in the fully opened state (Step S 15). Then, the ECU calculates a difference ”P between the intake pressures "Popen" and "Pclose", and drives the EGR shutoff valve to a fully closed state (Step S 19) on the condition that the difference ”P is equal to or smaller than a threshold value "Pth1" ("NO" in Step S17). Then, the ECU drives the EGR valve to the fully opened state (Step S20), and subsequently to the fully closed state (Step S21).