Patent ID: 8307644

Claim:
An internal combustion engine control device comprising: an internal combustion engine in which a first cylinder includes a turbo-side exhaust valve that opens and closes an exhaust port that communicates with a turbo-side exhaust passageway that leads to a turbine inlet opening of a turbo-supercharger, a bypass-side exhaust valve that opens or closes an exhaust port that communicates with a bypass-side exhaust passageway that bypasses a turbine, a first intake valve disposed opposite to the turbo-side exhaust valve, and a second intake valve disposed opposite to the bypass-side exhaust valve; a turbo-side exhaust valve stop mechanism that stops the turbo-side exhaust valve in a closed state while allowing the bypass-side exhaust valve to be in operation; a first intake valve stop mechanism that stops the first intake valve in a closed state while allowing the second intake valve to be in operation; and a stop mechanism control portion that stops the turbo-side exhaust valve and the first intake valve in the closed state at a time of startup of the internal combustion engine and/or a time of low load of the internal combustion engine, wherein at a time of intermediate load of the internal combustion engine and/or a time of high load of the internal combustion engine, an open valve duration of the turbo-side exhaust valve is made longer than an open valve duration of the bypass-side exhaust valve, and an open valve duration of the first intake valve is made longer than an open valve duration of the second intake valve.