Title :
Adaptive control of a three-way catalytic converter
Author :
Ammann, M. ; Geering, H.P. ; Onder, C.H. ; Roduner, C.A. ; Shafai, E.
Author_Institution :
Meas. & Control Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland
Abstract :
The three-way catalytic converter (TWC) is an effective device for reducing exhaust emissions in automobiles. For control purposes, the TWC can be regarded as an oxygen storage device. In order to reduce exhaust emissions efficiently, the oxygen storage should neither be completely full nor totally empty. Based on a simple model for oxygen storage in the TWC, an adaptive scheme for the control of the oxygen level is presented. The parameters involved in the model for oxygen storage are identified online by measuring the air-to-fuel ratios upstream and downstream of the TWC and using a recursive Gauss-Newton estimation method
Keywords :
Newton method; adaptive control; air pollution control; automobiles; chemical variables control; internal combustion engines; recursive estimation; air-to-fuel ratios; exhaust emissions; oxygen level control; oxygen storage device; recursive Gauss-Newton estimation method; three-way catalytic converter; Adaptive control; Automobiles; Engines; Exhaust systems; Laboratories; Least squares methods; Newton method; Programmable control; Recursive estimation; Testing;
Conference_Titel :
American Control Conference, 2000. Proceedings of the 2000
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-5519-9
DOI :
10.1109/ACC.2000.879463
