CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

The invention provides a control device for an internal combustion engine. The control device detects that an exhaust aftertreatment device is detached from an exhaust pipe. A control device (200) foran internal combustion engine (100) is provided with: a first exhaust gas temperature calculation unit that calculates a first exhaust gas temperature, which is the temperature of exhaust gas flowinginto a PM collection device (50); a second exhaust gas temperature calculation unit that calculates a second exhaust gas temperature, which is the temperature of the exhaust gas flowing out of the PMcollection device (50); a temporal change rate calculation unit that calculates a temporal change rate on the basis of the first exhaust temperature and the second exhaust temperature; and a determination unit that determines whether or not the PM collection device (50) has been detached from the exhaust pipe (22) on the basis of the difference between the rate of change over time of the first exhaust temperature and the r