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Torque modelling for optimising fuel economy in variable compression engines
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering.
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Vehicular Systems.
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering.
2008 (English)In: International Journal of Modelling, Identification and Control, ISSN 1746-6172, Vol. 3, no 3, 327-339 p.Article in journal (Refereed) Published
Abstract [en]

Fuel optimal control of a variable compression engine is studied and it is shown that a crucial component is the model for the engine torque. A model for the produced work that captures the important effects of ignition and compression ratio is proposed and investigated. The main task for the model is to be a mean for determining the fuel optimal control signals, for each requested engine torque and speed. The contribution is a model suitable for finding this optimal combination. This model consists of well-known components, and the novelty lies in the compilation and validation of the control-oriented efficiency model for a variable compression engine. The modelling and validation is performed on a multicylinder variable compression engine using two fuels with different octane rating. Despite the models simplicity, it describes the indicated work with good accuracy, and suits its purpose of finding optimal control signals. In the evaluation, it is shown that a fuel optimal controller based on the proposed model captures the optimal IMEP to within 1.2%. This corresponds to a loss in engine efficiency that is in the range of 0.5% units or less. Copyright © 2008, Inderscience Publishers.

Place, publisher, year, edition, pages
2008. Vol. 3, no 3, 327-339 p.
Keyword [en]
Compression ratio, Efficiency, Engine control, Fuel consumption
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-46321DOI: 10.1504/IJMIC.2008.020130OAI: oai:DiVA.org:liu-46321DiVA: diva2:267217
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-10

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Nilsson, YlvaEriksson, LarsGunnarsson, Martin

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf