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Cylinder Individual Efficiency Estimation for Online Fuel Consumption Optimization

Lewander, Magnus LU ; Tunestål, Per LU and Johansson, Bengt LU (2010) Fall Technical Conference of the ASME Internal Combustion Engine Division, 2010 In Proceedings Of The ASME Internal Combustion Engine Division Fall Technical Conference p.627-634
Abstract
Engine efficiency is often controlled in an indirect way through combustion timing control. This requires a priori knowledge of where to phase the combustion jiff different operating points and conditions. With cylinder individual efficiency estimation, control strategies aiming directly at fuel consumption optimization can be developed. This paper presents a method to estimate indicated efficiency using the cylinder pressure trace as input. The proposed method is based on a heat release calculation that takes heat losses into account implicitly using an estimated, CAD resolved polytropic exponent. Experimental results from a multi-cylinder engine show that with this approach, the estimated efficiency error is within 5% for all operating... (More)
Engine efficiency is often controlled in an indirect way through combustion timing control. This requires a priori knowledge of where to phase the combustion jiff different operating points and conditions. With cylinder individual efficiency estimation, control strategies aiming directly at fuel consumption optimization can be developed. This paper presents a method to estimate indicated efficiency using the cylinder pressure trace as input. The proposed method is based on a heat release calculation that takes heat losses into account implicitly using an estimated, CAD resolved polytropic exponent. Experimental results from a multi-cylinder engine show that with this approach, the estimated efficiency error is within 5% for all operating points tested. The final part of the paper is a discussion of how to use the efficiency estimation for feedback control. Different control concepts are presented as well as suggestions on how to handle the non-linear connection between combustion timing and indicated efficiency. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Proceedings Of The ASME Internal Combustion Engine Division Fall Technical Conference
pages
627 - 634
publisher
American Society Of Mechanical Engineers (ASME)
conference name
Fall Technical Conference of the ASME Internal Combustion Engine Division, 2010
external identifiers
  • wos:000290505600061
  • scopus:80054789756
ISBN
978-0-7918-4944-6
DOI
10.1115/ICEF2010-35113
language
English
LU publication?
yes
id
4a98b980-0b61-4767-b223-32100f916409 (old id 1984608)
date added to LUP
2011-07-08 15:59:07
date last changed
2017-04-16 04:30:03
@inproceedings{4a98b980-0b61-4767-b223-32100f916409,
  abstract     = {Engine efficiency is often controlled in an indirect way through combustion timing control. This requires a priori knowledge of where to phase the combustion jiff different operating points and conditions. With cylinder individual efficiency estimation, control strategies aiming directly at fuel consumption optimization can be developed. This paper presents a method to estimate indicated efficiency using the cylinder pressure trace as input. The proposed method is based on a heat release calculation that takes heat losses into account implicitly using an estimated, CAD resolved polytropic exponent. Experimental results from a multi-cylinder engine show that with this approach, the estimated efficiency error is within 5% for all operating points tested. The final part of the paper is a discussion of how to use the efficiency estimation for feedback control. Different control concepts are presented as well as suggestions on how to handle the non-linear connection between combustion timing and indicated efficiency.},
  author       = {Lewander, Magnus and Tunestål, Per and Johansson, Bengt},
  booktitle    = {Proceedings Of The ASME Internal Combustion Engine Division Fall Technical Conference},
  isbn         = {978-0-7918-4944-6},
  language     = {eng},
  pages        = {627--634},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {Cylinder Individual Efficiency Estimation for Online Fuel Consumption Optimization},
  url          = {http://dx.doi.org/10.1115/ICEF2010-35113},
  year         = {2010},
}