Patent ID: 7357119

Claim:
A variable valve type internal combustion engine in which the intake airflow is controlled with a plurality of intake valves, comprising a plurality of intake ports provided in each cylinder, an intake valve which individually opens and shuts each intake port, a variable valve gear which continuously and changeably sets at least one of the lift amount and the open valve period of each intake valve, and the operation modes of said plural intake valves in one cylinder can be set respectively and independently according to the operating states of the internal combustion engine, wherein the lift amount and the open valve period of one intake valve when the lift amount and the open valve period in which the variation of the air amount which passes through another intake valve falls within the allowable range are predetermined, and the difference between the demand air amount and the air amount which passes through one intake valve can be given by controlling the lift amount, the open valve period and the phase of another intake valve by giving one intake valve the lift amount and the open valve period predetermined in region where air amount is comparatively small in the high air amount region.