Patent ID: 7853399

Claim:
An internal combustion engine control apparatus, comprising: a variable valve drive mechanism capable of changing at least the time point to close an exhaust valve; an exhaust-valve-early-closing control executing section for executing an exhaust-valve-early-closing valve timing control in which the exhaust valve is closed before an intake stroke top dead center; a fuel injection timing controlling section for switching a fuel injection timing mode between an intake-stroke non-synchronized fuel injection mode and an intake-stroke synchronized fuel injection mode; and a combustion gas temperature estimating section for estimating the temperature of combustion gas in the internal combustion engine, wherein the fuel injection timing controlling section executes the intake-stroke non-synchronized fuel injection mode during the exhaust-valve-early-closing valve timing control, and the fuel injection timing controlling section switches the fuel injection timing mode from the intake-stroke non-synchronized fuel injection mode to the intake-stroke synchronized fuel injection mode if the combustion gas temperature is estimated to be relatively high while the internal combustion engine is idling.