Patent ID: 6856891
Filing Date: 2005-02-15
Classification: F02D

Abstract:
1. A control apparatus comprising: deviation calculating means for calculating a deviation of an output of a controlled object from a predetermined target value; first control input calculating means for calculating a control input to said controlled object for converging the output of said controlled object to said target value in accordance with the calculated deviation based on one modulation algorithm selected from a Δ modulation algorithm, a ΔΣ modulation algorithm, and a ΣΔ modulation algorithm; second control input calculating means for calculating a control input to said controlled object for converging the output of said controlled object to said target value in accordance with the calculated deviation based on a response specified control algorithm; detecting means for detecting a state of said controlled object; selecting means for selecting one of said first and second control input calculating means in accordance with the detected state of said controlled object as control input calculating means; and switching means responsive to a change in said control input calculating means selected by said selecting means from one of said first and second control input calculating means to the other for switching from said one control input calculating means to said other control input calculating means when the calculated deviation falls within a predetermined range.