Patent ID: 8276365

Claim:
An internal combustion engine control device comprising: a turbocharger provided on an internal combustion engine; a first exhaust valve that opens and closes an exhaust port that communicates with a first exhaust passageway on which a turbine of the turbocharger is provided; a second exhaust valve that opens and closes an exhaust port that communicates with a second exhaust passageway that bypasses the turbine; a catalyst disposed at a downstream side of a meeting point of the first exhaust passageway and the second exhaust passageway; an engine load acquisition device that acquires an engine load; and a control portion that opens only the second exhaust valve when the engine load is less than a first predetermined value, and that opens both the first and second exhaust valves when the engine load is greater than or equal to the first predetermined value and less than a second predetermined value, and that opens only the first exhaust valve when the engine load is greater than or equal to the second predetermined value, wherein the control portion sets the first predetermined value to be lower during a lean combustion than during a stoichiometric combustion.