A Physical Two-Zone NOx Model Intended for Embedded Implementation
Author
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.
Publishing year
2009
Language
English
Publication/Series
SAE Technical Papers
Full text
Document type
Conference paper
Publisher
SAE
Topic
- Other Mechanical Engineering
Keywords
- 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
Project
- Competence Centre for Combustion Processes
ISBN/ISSN/Other
- SAE 2009-01-1509