Patent ID: 8271180

Claim:
An intake control system for an internal combustion engine, comprising: a variable intake lift mechanism that adjusts an intake air amount by changing a lift of an intake valve; a throttle valve that is disposed in an intake passage, for adjusting intake pressure by changing an opening of said throttle valve; operating condition-detecting means for detecting operating conditions of the engine; target intake air amount-setting means for setting a target intake air amount serving as a target of the intake air amount according to the detected operating conditions of the engine; correction means for correcting the set target intake air amount such that a change in the target intake air amount is delayed; throttle valve opening-setting means for setting the opening of said throttle valve according to the corrected target intake air amount; and lift-detecting means for detecting a lift of the intake valve, wherein said correction means comprises: limit value-setting means for setting a limit value which is at least one of an upper limit value and a lower limit value of the target intake air amount according to the detected lift of the intake valve, and limiting means for limiting the target intake air amount based on the set limit value, and when the target intake air amount is limited by said limiting means, corrects the limited target intake air amount such that a change in the limited target intake air amount is delayed.