Patent ID: 7386390
Filing Date: 2008-06-10
Classification: F01L,F02D,Y02T

Abstract:
1. A variable valve control method for an internal combustion engine provided with a variable valve mechanism that varies an operating characteristic of an intake valve, for controlling a gas amount passing through said intake valve by variably controlling said operating characteristic, comprising the steps of: calculating an amount of fresh air that flows into a cylinder based on a requested torque; calculating a gas amount spit-back to an intake side from the inside of the cylinder when said intake valve is opened, based on a requested residual gas rate; calculating a requested gas amount passing through said intake valve, based on an amount of predetermined times the spit-back gas amount of the time when said intake valve is opened and said fresh air amount; setting a target operating characteristic of said intake valve based on said requested valve passing gas amount; and controlling said variable valve mechanism based on said target operating characteristic.