C2.4 - Real-time capable parameter tuning for exhaust gas aftertreatment models in automotive applications
- Event
- AMA Conferences 2013
2013-05-14 - 2013-05-16
Nürnberg - Band
- Proceedings SENSOR 2013
- Chapter
- C2 - Sensor Electronics II
- Author(s)
- S. Schödel, T. Jungkunz, R. Królak, G. Fischerauer - University of Bayreuth (Germany)
- Pages
- 373 - 378
- DOI
- 10.5162/sensor2013/C2.4
- ISBN
- 978-3-9813484-3-9
- Price
- free
Abstract
State-of-the-art control strategies for spark ignition engines take into account the oxygen storage level of the indispensable three-way catalyst (TWC) by a model-based approach. Owing to the limited onboard processing power, the models used are simplified compared to the actual system dynamics. Their accuracy can be improved by an additional direct state observation, e. g., with microwave measurement systems in which the catalyst state is inferred from measured cavity resonance curves. However, the accuracy of time-invariant models deteriorates with time because of catalyst aging. We present a real-time capable method to adjust the parameters of a TWC model by continuously comparing measured resonance frequencies with frequencies computed by a linearized RF model.