| 摘要 |
An object of the present invention is to detect abnormality of a supercharging pressure sensor accurately in an internal combustion engine equipped with a supercharger that can change a supercharging pressure by operation of an actuator. For this purpose, a control device according to the present invention operates an actuator (38) so that a supercharging pressure (Picm) measured by a supercharging pressure sensor (44) becomes a target supercharging pressure (Pict), acquires a measured value (mafm) of a flow rate of air flowing in an intake passage (10), and calculates an estimated supercharging pressure (Pice) based on the measured air flow rate (mafm). The control device according to the present invention sets a first abnormality flag (FLG1) when a first simultaneous inequality is established, which is a simultaneous inequality evaluating magnitude correlation between the measured supercharging pressure (Picm), the target supercharging pressure (Pict) and the estimated supercharging pressure (Pice), and is not established when the supercharging pressure sensor (44) is normal. As a result that the first abnormality flag (FLG1) is set, it can be known that abnormality occurs to the supercharging pressure sensor (44). |
