Variable valve type internal combustion engine and control method thereof

摘要

The operation modes of plural intake valves 7 a and 7 b provided in one cylinder is independently changed according to the drive region of the internal combustion engine. In the low air amount region, the intake airflow is controlled only with intake valve 7 a which operates in the low air amount region and the other intake valve 7 b is operated in the medium and high air amount regions.