Patent ID: 8688355

Claim:
An intake air flow rate control device for an internal combustion engine, which has a function of calculating a target throttle opening degree on the basis of a required intake air flow rate of the internal combustion engine, the intake air flow rate control device comprising: a first required throttle opening degree calculation portion that calculates a first required throttle opening degree in consideration of a delay in response of an intake system on the basis of the required intake air flow rate; a second required throttle opening degree calculation portion that calculates a second required throttle opening degree in consideration of a delay in response of the intake system on the basis of the required intake air flow rate in a response characteristic different from that of the first required throttle opening degree calculation portion; and a target throttle opening degree calculation portion that calculates the target throttle opening degree on the basis of the first required throttle opening degree and the second required throttle opening degree, wherein the target throttle opening degree calculation portion sets the target throttle opening degree so that the target throttle opening degree falls within a range from the first required throttle opening degree to the second required throttle opening degree and a variation amount of the target throttle opening degree is smaller than a variation amount of any one of the first and second required throttle opening degrees.