This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Physical Two-Zone NO x Model Intended for Embedded Implementation
Technical Paper
2009-01-1509
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This paper offers a two-zone NOx model suitable for vehicle on-board, on-line implementation. Similar NOx modeling attempts have previously been undertaken. The hereby suggested method does however offer clear and important benefits over the previously methods, utilizing a significantly different method to handle temperature calculations within the (two) different zones avoiding iterative computation. The new method significantly improves calculation speed and, most important of all, reduces implementation complexity while still maintaining reasonable accuracy and the physical interpretation of earlier suggested methods. The equations commonly used to compute NOx emissions is also rewritten in order to suit a two-zone NOx model. An algorithm which can be used to compute NOx emissions is presented and the intended contribution of the paper is a NOx model, implementation feasible for an embedded system, e.g. embedded processor or embedded electronic hardware (FPGA). For that purpose parts of the algorithm can be pre-computed and stored in tables allowing significant acceleration of the computation.
Recommended Content
Authors
Citation
Wilhelmsson, C., Tunestål, P., Widd, B., and Johansson, R., "A Physical Two-Zone NOx Model Intended for Embedded Implementation," SAE Technical Paper 2009-01-1509, 2009, https://doi.org/10.4271/2009-01-1509.Also In
References
- Guzella, L Onder C. H. “Introduction to Modeling and Control of Internal Combustion Engine Systems” Springer 2004
- Andersson M. Johansson B. Hultqvist A. Nöhre¨ C. “A Real-Time NO x Model for Conventional and Partially Premixed Diesel Combustion” SAE 2006-01-0195
- Ericsson C. Westerberg B. “Modelling Diesel Engine Combustion and NO x Formation for Model Based...” SAE 2006-01-0687
- Egnell R. “Combustion Diagnosis by Means of Multi-zone Heat Release Analysis and NO Calculation” SAE 981424
- Gatowski J.A. Balles E.N. Chun K.M. Nelson F. E. Ekichian J. A. Heywood J. B. “Heat Release Analysis of Engine Pressure Data” SAE 841359
- Heywood J. B. ”Internal Combustion Engine Fundamentals” McGraw-Hill 1988
- Bensson R. S. Whitehouse N. D. “Internal Combustion Engines” Pergamon Press 1979
- Dec J. E. “A Conceptual Model of DI Diesel Combustion Based on Laser-Sheet Imaging” SAE 970873
- Wilhelmsson C. Tunestål P. Johansson B. “FPGA Based Engine Feedback Control Algorithms”
- Tunestål P. “Estimation of the In-Cylinder Air/fuel Ration of an Internal Combustion Engine by the Use of Pressure Sensors”
- Horn U. Rijk E. Egnell R. Andersson O. Johansson B. “Investigation on Differences in Engine Efficiency with Regard to Fuel Volatility and Engine Load” SAE 2008-01-2385