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Estimation of combustion variability using in-cylinder ionization measurements
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Intelligent systems (IS-lab).
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Intelligent systems (IS-lab).ORCID iD: 0000-0001-5163-2997
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), Intelligent systems (IS-lab).ORCID iD: 0000-0002-4143-2948
2001 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper investigates the use of the ionization current to estimate the Coefficient of Variation for the Indicated Mean Effective Pressure, COV(IMEP), which is a common variable for combustion stability in a spark-ignited engine. Stable combustion in this definition implies that the variance of the produced work, measured over a number of consecutive combustion cycles, is small compared to the mean of the produced work. The COV(IMEP) is varied experimentally either by increasing EGR flow or by changing the air-fuel ratio, in both a laboratory setting (engine in dynamometer) and in an on-road setting. The experiments show a positive correlation between COV(Ion integral), the Coefficient of Variation for the integrated Ion Current, and COV(IMEP), when measured under low load on an engine in a dynamometer, but not under high load conditions. On-road experiments show a positive correlation, but only in the EGR and the lean burn case. An approach based on individual cycle classification for real-time estimation of combustion stability is discussed. © Copyright 2001 Society of Automotive Engineers, Inc.

Place, publisher, year, edition, pages
Warrendale, PA: Society of Automotive Engineers, 2001.
Series
SAE technical paper series, ISSN 0148-7191
Keywords [en]
Combustion Variability
National Category
Engineering and Technology Control Engineering
Identifiers
URN: urn:nbn:se:hh:diva-5020DOI: 10.4271/2001-01-3485Scopus ID: 2-s2.0-84877546502OAI: oai:DiVA.org:hh-5020DiVA, id: diva2:327068
Conference
SAE International Fall Fuels & Lubricants Meeting & Exhibition, Session: Experimental Investigation of SI Engines (Part A&B), San Antonio, TX, USA, September 24-27, 2001
Note

SAE Technical Paper 2001-01-3485. Funding: Swedish National Energy Administration (STEM)

Available from: 2010-06-28 Created: 2010-06-28 Last updated: 2018-03-23Bibliographically approved
In thesis
1. Virtual sensing of combustion quality in SI engines using the ion current
Open this publication in new window or tab >>Virtual sensing of combustion quality in SI engines using the ion current
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Göteborg: Chalmers tekniska högskola, 2004. p. 70
Series
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, ISSN 0346-718x ; 2207
Keywords
Internal Combustion Engines, Spark Ignition, Estimation, Control, Neural Networks, Ion Current
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:hh:diva-667 (URN)2082/1009 (Local ID)91-7291-525-0 (ISBN)2082/1009 (Archive number)2082/1009 (OAI)
Public defence
2004-11-19, Wgforssalen, Halmstad, 10:15 (English)
Opponent
Supervisors
Available from: 2007-05-07 Created: 2007-05-07 Last updated: 2016-04-13Bibliographically approved
2. Algorithms for ion current based sensing of combustion variability and pressure peak position
Open this publication in new window or tab >>Algorithms for ion current based sensing of combustion variability and pressure peak position
2003 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Göteborg: Chalmers tekniska högsk., 2003. p. 43
Series
Technical report. L, ISSN 1651-4998 ; 482
Keywords
SI engines, Combustion variability, Ion currents, Location of pressure peak, Exhaust Gas Recirculation, Electronic engine control
National Category
Control Engineering
Identifiers
urn:nbn:se:hh:diva-666 (URN)2082/1008 (Local ID)2082/1008 (Archive number)2082/1008 (OAI)
Presentation
2003-12-09, Wigforssalen, Visionen, Kristian IV:s väg 3, Halmstad, 10:00 (English)
Supervisors
Projects
SCALE (Self CALibrating Engine control)
Funder
Knowledge Foundation
Note

Funding: STEM (Swedish National Energy Administration), the KK-foundation & Mecel AB

Available from: 2007-05-07 Created: 2007-05-07 Last updated: 2018-03-23Bibliographically approved

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Byttner, StefanRögnvaldsson, ThorsteinnWickström, Nicholas

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