Patent ID: 7107140

Claim:
An internal combustion engine control apparatus for an engine having a variable valve operating mechanism configured and arranged to vary valve characteristics of an intake valve of the engine, the internal combustion engine control apparatus comprising: reference intake air quantity calculating means for calculating a reference intake air quantity corresponding to when an intake air is taken in a cylinder as a sonic flow with an intake valve opening area corresponding to the valve characteristics of the intake valve; maximum intake air quantity calculating means for calculating a theoretical maximum intake air quantity corresponding to when a cylinder stroke volume from a start timing to an end timing of an intake stroke is filled with intake air at an intake air pressure existing upstream of the intake valve; and engine control means for controlling the engine by using an intake air quantity function between a first value obtained by dividing the reference intake air quantity by the maximum intake air quantity and a second value obtained by dividing an actual intake air quantity corresponding to the valve characteristics of the intake valve by the maximum intake air quantity, with each value of the first value being uniquely determined with respect to the second value and each value of the second value being uniquely determined with respect to first value.