Patent ID: 7051726

Claim:
A control device for an internal combustion engine having an intake passage and a throttle valve arranged in the intake passage, the control device comprising: target air amount calculating means for calculating a target value of an intake air amount; estimating means for repeatedly estimating an intake pipe pressure which is a pressure in the intake passage downstream of the throttle valve; target throttle opening calculating means for calculating a target throttle opening required for making the actual intake air amount equal to the target intake air amount, on the basis of the intake pipe pressure; driving means for driving the throttle valve; judging means for judging whether the target throttle opening can be realized by the driving means; and setting means for setting a final target throttle opening to a maximum or minimum throttle opening which can be realized by the driving means when it is judged that the target throttle opening cannot be realized by the driving means; wherein the driving means drives the throttle valve so that the actual throttle opening is made equal to the final target throttle opening, and wherein the estimating means estimates the new intake pipe pressure on the basis of the final target throttle opening.