Combustion analysis of natural gas/air mixture in an HCCI engine using experiment and chemical reactions calculation

Daesu Jun, Kazuaki Ishii, Norimasa Iida

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Homogeneous charge compression ignition (HCCI) combustion is regarded as next generation combustion method in terms of high thermal efficiency and low emissions. Natural gas is regarded as the most promising alternative fuel due to its clean burning and abundant supply. In this study, it was inventigated characteristics of autoignition and combustion of natural gas in an HCCI engine by using chemical reactions calculation and experimental study. And also, the operation conditions to realize combustion completion in an HCCI engine were suggested. The influences of n-butane blend ratio on autioignition and combustion was clarified in methane/n-butane/air mixtures. As a results of experiment and chemical reactions calculation, it becomes clear the following facts; i) Autoignition temperature of natural gas is in a range of 1 000=100 K without relations of equivalence ratios, intake temperatures and intake pressures, ii) To realize high thermal efficiency and low CO emissions, it is necessary to prepare operation conditions that maximum cycle temperature is over 1 500 K. iii) As blend ratios of n-butane are increased in Methane/n-butane/air mixtures, autoignition temperature and autoignition pressure become lower.

Original languageEnglish
Pages (from-to)1282-1289
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Issue number681
Publication statusPublished - 2003 May


  • Autoignition
  • Combustion
  • HCCI Engine
  • Internal Combustion Engine
  • Natural Gas

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering


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