Patent ID: 7469180

Claim:
An intake air amount control system for an internal combustion engine, which variably controls an amount of intake air drawn into a cylinder via a variable intake valve timing device that changes valve timing of an intake valve, as desired, comprising: estimated intake air amount-calculating means for calculating an estimated intake air amount as an estimated value of the amount of intake air drawn into the cylinder; target intake air amount-setting means for setting a target intake air amount as a target to which the intake air amount is to be controlled; identification means for identifying, based on a controlled object model to which a control command value for controlling the variable intake valve timing device is inputted and from which the estimated intake air amount is outputted, all model parameters of the controlled object model, with a predetermined identification algorithm; control command value-calculating means for calculating the control command value based on the identified all model parameters such that the estimated intake air mount converges to the target intake air amount; and control means for controlling the variable intake valve timing device according to the calculated control command value.