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Ionization Current Interpretation for Ignition Control in Internal Combustion Engines
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
1997 (English)In: Control Engineering Practice, ISSN 0967-0661, E-ISSN 1873-6939, Vol. 5, no 8, 1107-1113 p.Article in journal (Refereed) Published
Abstract [en]

Spark advance setting in spark-ignited engines is used to place the in-cylinder pressure curve relative to the top dead center. A feedback scheme, not a calibration scheme, based on ionization current is proposed here. It is thus related to pressure sensor feedback schemes, that have reported good results, but have not yet been proved cost effective, due to the cost of the pressure sensor. The method proposed here is very cost-effective, since it uses exactly the same hardware and instrumentation (already used in production cars) that is used to utilize the spark plug as a sensor to detect misfire and as a sensor for knock control. A key idea in the method is to use parameterized functions to describe the ionization current. These parameterized functions are used to separate out the different phases of the ionization current. Special emphasis is laid on getting a correct description of the pressure development. The results are validated on a SAAB 2.3 l production engine by direct comparison with an in-cylinder pressure sensor (used only for validation, not for control), but also by using a physical model relating the ionization current to the pressure.

Place, publisher, year, edition, pages
Pergamon Press, 1997. Vol. 5, no 8, 1107-1113 p.
Keyword [en]
Spark advance control, engine control, spark plug sensing, engine efficiency, pattern recognition
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-137244DOI: 10.1016/S0967-0661(97)00103-2ISI: A1997XQ99200010Scopus ID: 2-s2.0-0031208877OAI: oai:DiVA.org:liu-137244DiVA: diva2:1094312
Available from: 2017-05-09 Created: 2017-05-09 Last updated: 2017-05-18Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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  • Other style
More styles
Language
  • de-DE
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