Apparatus for controlling internal combustion engine

An apparatus for controlling an internal combustion engine, the internal combustion engine comprising:

• a supercharger comprising a turbine disposed on an exhaust passage, having an exhaust-side variable vane mechanism capable of adjusting exhaust pressure in accordance with its opening/closing state, and a compressor disposed on an intake passage, having an intake-side variable vane mechanism in a diffuser part of the compressor, capable of adjusting an air flow quantity in accordance with its opening/closing state;
• and
• a detecting device capable of detecting actual supercharging pressure of the supercharger on a downstream side of the compressor,
• said apparatus comprising:
• a controller which is configured to specify a time transition of the detected actual supercharging pressure in a period in which a change speed of target supercharging pressure of the supercharger is greater than or equal to a predetermined value and determine presence or absence of abnormality of the supercharger on the basis of the specified time transition and determine whether the abnormality is abnormality of the turbine or abnormality of the compressor if it is determined that supercharger is abnormal.