Autoignition of pentane isomers in a spark-ignition engine

Song Cheng, Yi Yang, Michael J. Brear, Dongil Kang, Stanislav Bohac, André L. Boehman

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


The autoignition of three pentane isomers (n- neo- and iso-pentane) in a Cooperative Fuel Research (CFR) engine operating at standard ASTM knocking conditions was examined by measuring first the Research Octane Numbers (RON) of these three fuels and compared to historical data. Autoignition of pentane/air mixtures in the CFR engine were then simulated using a two-zone model with detailed chemical kinetics with calibrated initial and boundary conditions. Detailed kinetic mechanisms for these fuels were tested with a published NO sub-mechanism incorporated into them. Simulations using both of these mechanisms showed autoignition in the engine for all three pentanes and that residual NO promoted autoignition. Nonetheless differences between these two mechanisms and the engine experiments were observed which are consistent with those observed in simulations of previous rapid compression machine data.

Original languageEnglish
Pages (from-to)3499-3506
Number of pages8
JournalProceedings of the Combustion Institute
Issue number3
Publication statusPublished - 2017
Externally publishedYes


  • Autoignition
  • Knock
  • Nitric oxide
  • Pentane
  • Spark-ignition engine

ASJC Scopus subject areas

  • General Chemical Engineering
  • Mechanical Engineering
  • Physical and Theoretical Chemistry


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