| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable feed back control which can cope with idle time when reducing a contaminating substance content by injecting ammonium into a gas containing nitrogen oxide and the like. <P>SOLUTION: An apparatus 25 for controlling an exhaust gas treating device is provided with an internal state estimating means 41 for calculating an internal state quantity estimated value x<SB>P</SB>estimating the internal state quantity using a dynamic characteristics model prepared by modeling a variation over time of an internal state quantity variable in an exhaust gas treating device, and a feed back control variable accumulator 48 for calculating a feed back control variable u<SB>B</SB>by adding a state feed back control variable u<SB>S</SB>obtained by multiplying an internal state quantity estimating value x<SB>p</SB>by a state feed back gain -K<SB>S</SB>to an integral feed back control variable u<SB>I</SB>obtained by multiplying a value v obtained by integrating a deviation e of an exhausted contaminating substance amount y from a target exhausted contaminating substance amount r by an integral gain -K<SB>I</SB>. An ammonium injecting amount u is, for example, obtained by adding the feed back control variable u<SB>B</SB>to a feed forward control variable u<SB>W</SB>. <P>COPYRIGHT: (C)2009,JPO&INPIT |
