In intake air control apparatus and method for an internal combustion engine,
a target angle calculating section calculates a target angle of one of first and
second variably operated valve mechanisms from a target load in accordance with
an accelerator opening angle and a present engine speed, a variably operated valve
mechanism actual angle outputting section derives and outputs an actual angle of
the one of the first and second variably operated valve mechanisms which is varied
toward the target angle, and another target angle calculating section calculates
another target angle of the other of the first and second variably operated valve
mechanisms from a derived and outputted present corresponding variably operated
valve mechanism actual angle equivalent value, the present engine speed, and the
target load on the basis of a known relationship among four of the working angle,
the central angle, the engine speed, and a load.