A Physical Two-Zone NOx Model Intended for Embedded Implementation
Författare
Summary, in English
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.
Publiceringsår
2009
Språk
Engelska
Publikation/Tidskrift/Serie
SAE Technical Papers
Fulltext
Dokumenttyp
Konferensbidrag
Förlag
SAE
Ämne
- Other Mechanical Engineering
Nyckelord
- NOx
- Embedded system
- Model
- Engine
- FPGA
- NO
Conference name
SAE World Congress, 2009
Conference date
2009-04-20 - 2009-04-23
Conference place
Detroit, Michigan, United States
Status
Published
Projekt
- Competence Centre for Combustion Processes
ISBN/ISSN/Övrigt
- SAE 2009-01-1509