This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Catalyst Diagnostics Using Adaptive Control System Parameters
Technical Paper
2006-01-1070
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
An integrated model-based three-way catalyst control and diagnostic monitoring system is described which has the potential for improved health discrimination while also significantly reducing the calibration burden. The catalyst is modeled as a simple limited integrator with an adaptive integral gain. The adaptive gain, used in the control system, is also used as a diagnostic metric since (among other variables) it reflects the catalyst oxygen storage capacity and hence the health of the system. The method has been applied to a 4.6 liter ULEV II gasoline engine, and tested over an EPA Federal Test Procedure drive cycle with a number of differently aged catalysts. Preliminary results are encouraging, and show that the method is able to discriminate between the catalysts, even those with similar age near the OBD threshold.
Recommended Content
Authors
Topic
Citation
Peyton Jones, J., Makki, I., and Muske, K., "Catalyst Diagnostics Using Adaptive Control System Parameters," SAE Technical Paper 2006-01-1070, 2006, https://doi.org/10.4271/2006-01-1070.Also In
References
- McCarthy M Update on Light Duty OBD II SAE On Board Diagnostics Symposium Pasadena, CA 2005
- Balenovic M Backx A.C.P.M Hoebink J.H.B.J On a Model-based Control of a Three-way Catalytic Converter SAE paper 2000-01-0937 2000
- Shafai E Roduner C Geering H Indirect Adaptive Control of a Three Way Catalyst SAE paper 961038
- Ingram G.A. Surnilla G On-line Oxygen Storage Capacity Estimation of a Catalyst SAE paper 2003-01-1000
- Theis J Catalytic Converter Diagnosis Using the Catalyst Exotherm SAE paper 942058 1994
- Griffin J Closed Loop Catalyst Temperature Feedback for controlled Catalyst Lightoff and Diagnostics for ULEV SAE paper 1999-01-0311
- Hepburn J.S. Gandhi H.S. The Relationship Between Catalyst Hydrocarbon conversion Efficiency and Oxygen Storage Capacity SAE paper 920831 1992
- Peyton Jones J.C. Jackson R.A. Potential & Pitfalls in the Use of Dual EGO Sensors for 3-Way Catalyst Monitoring & Control Proceedings of the Institute of Mechanical Engineers, Part D: Journal of Automobile Engineering 217 475 488 2003
- Cambell B. Farrington R. Inman G. Dinsdale S. Gregory D. Eade D. Kisenyi J. Improved Three-Way Catalyst Performance Using an Active Bias Control Regeneration System SAE paper 2000-01-0499
- Flauti I.A Pianese C Rizzo G Barberio C Flora R Serra G Siviero C Confidence Level Analysis for On-Board Estimation of SI Engine Catalytic Converter Efficiency IFAC 2000
- Peyton Jones JC Muske KR Model-based OBD for Three-Way Catalyst Systems SAE International Congress paper no. 2004-01-0639