Patent ID: 7762068

Claim:
A control apparatus for an internal combustion engine with a supercharger, comprising: a supercharger having a centrifugal compressor; rotation speed acquisition means for acquiring compressor rotation speed of the centrifugal compressor; first operating parameter acquisition means for acquiring a first operating parameter for the internal combustion engine, wherein the first operating parameter correlates to an operating characteristic of the centrifugal compressor, a fluctuation of which is less than that of an intake manifold pressure; base limit rotation speed acquisition means for acquiring surge limit compressor rotation speed on the basis of the first operating parameter; second operating parameter acquisition means for acquiring a second operating parameter for the internal combustion engine, wherein the second operating parameter affects an air flow amount passing through the centrifugal compressor, and wherein the second operating parameter is different from the first operating parameter; corrected limit rotation speed acquisition means for acquiring corrected surge compressor limit rotation speed by correcting the base surge limit compressor rotation speed in accordance with the second operating parameter; and compressor control means for controlling compressor rotation speed on the basis of the corrected surge limit compressor rotation speed and the compressor rotation speed.