Cylinder air/fuel ratio estimation using net heat release data

Research output: Contribution to journalArticle

Abstract

An estimation model which uses the net heat release profile for estimating the cylinder air/fuel ratio of a spark ignition engine is developed. The net heat release profile is computed from the cylinder pressure trace and quantifies the conversion of chemical energy of the reactants in the charge into thermal energy. The net heat release profile does not take heat- or mass transfer into account. Cycle-averaged air/fuel ratio estimates over a range of engine speeds and loads show an RMS error of 4.1% compared to measurements in the exhaust.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Mechanical Engineering

Keywords

  • Engine control, Engine modelling, Pressure, Least-squares estimation, Least-squares identification
Original languageEnglish
Pages (from-to)311-318
JournalControl Engineering Practice
Volume11
Issue number3
Publication statusPublished - 2003
Publication categoryResearch
Peer-reviewedNo

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