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A Physical Two-Zone NOx Model Intended for Embedded Implementation

Johansson, Bengt LU ; Wilhelmsson, Carl LU ; Tunestål, Per LU ; Johansson, Rolf LU and Widd, Anders LU (2009) SAE World Congress, 2009 In SAE Technical Papers
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
NOx, Embedded system, Model, Engine, FPGA, NO
in
SAE Technical Papers
pages
11 pages
publisher
SAE
conference name
SAE World Congress, 2009
external identifiers
  • other:SAE 2009-01-1509
  • scopus:84877165337
DOI
10.4271/2009-01-1509
language
English
LU publication?
yes
id
dde0a311-f5ab-4a93-9c43-236226604228 (old id 1390855)
date added to LUP
2009-05-13 12:24:34
date last changed
2017-05-21 04:42:53
@inproceedings{dde0a311-f5ab-4a93-9c43-236226604228,
  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.},
  author       = {Johansson, Bengt and Wilhelmsson, Carl and Tunestål, Per and Johansson, Rolf and Widd, Anders},
  booktitle    = {SAE Technical Papers},
  keyword      = {NOx,Embedded system,Model,Engine,FPGA,NO},
  language     = {eng},
  pages        = {11},
  publisher    = {SAE},
  title        = {A Physical Two-Zone NOx Model Intended for Embedded Implementation},
  url          = {http://dx.doi.org/10.4271/2009-01-1509},
  year         = {2009},
}