Patent ID: 7216613
Filing Date: 2007-05-15
Classification: F01L,F02D,Y02T

Abstract:
1. A variable valve control apparatus for an internal combustion engine, comprising: a variable valve apparatus for changing valve opening/closing characteristics of an intake valve or an exhaust valve for the internal combustion engine; a reference model for simulating a desired response characteristic of the variable valve apparatus; a valve timing control means for controlling valve timing of the variable valve apparatus by operating a control input of the variable valve apparatus in such a way as to realize a target value of the valve timing by using the reference model; and a control input-calculating means for calculating the control input of the variable valve apparatus based upon an output of the reference model obtained when the target value is input to the reference model, wherein the reference model is constructed by using a dynamic characteristic of the variable valve apparatus in a region where a changing speed of the valve timing of the variable valve apparatus becomes a maximum changing speed of the valve timing or in the vicinity thereof.