Measurement of the temperature history of unburned gas before knocking in a spark-ignition engine using laser interferometry

Eiji Tomita, Yoshisuke Hamamoto, Dongmin Jiang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

It is very important to know the temperature history in a spark-ignition engine when the phenomenon of knocking is being studied. However, measurement of the gas temperature is not easy and some work has been done using laser diagnostics etc. In this study, the temperature history until the time of occurrence of knocking in a spark-ignition engine was measured by a form of laser interferometry designed especially for use in the combustion chamber. Not only the change in temperature but also the absolute value of the temperature could be determined with this interferometer, by utilizing the change of the gas density on the reference side. This is non-intrusive measurement and high resolution is expected. The temperature resolution is about 5 K near the occurrence of knocking.

Original languageEnglish
Pages (from-to)587-593
Number of pages7
JournalMeasurement Science and Technology
Volume11
Issue number6
DOIs
Publication statusPublished - Jun 2000

Keywords

  • Interferometry
  • Knocking
  • Spark-ignition engine
  • Temperature

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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