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Spark Advance for Optimal Efficiency
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
1999 (English)In: SAE technical paper series, ISSN 0148-7191, Vol. 108, 789-798 p.Article in journal (Refereed) Published
Abstract [en]

Most of todays spark-advance controllers operate in open loop but there are several benefits of using feed-back or adaptive schemes based on variables deduced from the cylinder pressure. A systematic study of how different engine conditions change the deduced variables, at optimal ignition timing, is performed. The analysis is performed using a one-zone heat-release model and varying the model parameters. The deduced variables that are studied are: position of the pressure peak, mass fraction burned levels of 30%, 45%, 50%, and 90%, and the pressure ratio. For MBT timing the position for 45% mass fraction burned changed least under a large variety of changes in burn rate. Cycle-to-cycle variations do not have a significant effect and it suffices to evaluate the mean values for the burn rate parameters. The pressure ratio produces values similar to the mass fraction burned and requires no separate treatment.

Place, publisher, year, edition, pages
S A E Inc. , 1999. Vol. 108, 789-798 p.
Keyword [en]
Engine Modelling
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-137247DOI: 10.4271/1999-01-0548ScopusID: 2-s2.0-79959841085OAI: oai:DiVA.org:liu-137247DiVA: diva2:1094300
Note

SAE Technical Paper 1999-01-0548

Available from: 2017-05-09 Created: 2017-05-09 Last updated: 2017-05-18Bibliographically approved

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Eriksson, Lars
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