This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Parametric Identification of the Dynamic Characteristics of a Three-Way Catalytic Converter
Technical Paper
2000-01-0653
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
The relationship between the concentration of various gas components (CO,NO,HC) at the output of a three-way catalytic converter and the input and output air-fuel ratios (AFRs) is examined. A simple linear-in-the-parameters model is developed and it is assumed that the model parameters in the lean and rich regions are different. The model is fitted to some experimental step response data obtained from fast gas response analysers and UEGO sensors, using a recursive linear least-squares estimation method. A reasonably good fit to the data is obtained, particularly for NO and CO. Results from step tests for different AFR ranges are combined to obtain an overall picture of the dependency of the gas components on measured AFR values. The proposed model provides the possibility of predicting the dynamic performance of catalytic converters from a knowledge of the input and output AFR values.
Authors
Citation
Roberts, B., Peyton Jones, J., Bernard, P., and Jackson, R., "Parametric Identification of the Dynamic Characteristics of a Three-Way Catalytic Converter," SAE Technical Paper 2000-01-0653, 2000, https://doi.org/10.4271/2000-01-0653.Also In
Exhaust Aftertreatment Modeling and Gasoline Direct Injection Aftertreatment
Number: SP-1533; Published: 2000-03-06
Number: SP-1533; Published: 2000-03-06
References
- Peyton Jones, J.C. Jackson, R.A. Roberts, J.B. Bernards, P. A Simplified Model for the Dynamics of a Three-Way Catalytic Converter SAE 2000 Congress
- Germann, H.J. Onder, C.H. Geering, H.P. Fast Gas Concentration Measurements for Model Validation of Catalytic Converters SAE paper 950477 1995
- Aimard, F. Sorine, M. Mathematical Modelling of Automotive 3-way Catalytic Converters with Oxygen Storage Capacity Control Engineering Practice 4 8 1996 1119 1124
- Brandt, E.P. Wang, Y. Grizzle, J.W. A Simplified 3-way Catalyst Model for Use in On-board SI Engine Control and Diagnostics ASME International Congress and Exposition, Sixth ASME Symposium on Advanced Automotive Technologies 1997
- Peyton Jones, J.C. Roberts, J.B. Pan, J. Jackson, R.A. Modelling the Transient Characteristics of a Three-way Catalyst SAE paper 990460 1996