Applied Physics B

, Volume 51, Issue 1, pp 63–66 | Cite as

CARS measurements of temperature and species concentrations in an IC engine

  • M. J. Cottereau
  • F. Grisch
  • J. J. Marie
Laser Diagnostics In Combustion

Abstract

Temperature measurements alone, and also simultaneous CO2 concentration and temperature measurements, have been performed inside a fired IC engine. To tackle the two main problems encounted when making measurements in an engine (i.e., cycle-to-cycle variations and beam steering by density gradients), the shot-by-shot referencing technique and the in situ referencing technique using N2 to determine [CO2] were used. The temperature is deduced from the broadband N2 CARS signal and narrow band detection is used for CO2. A representative example of temperature measurements is given which shows a correlation between temperature and knocking intensity in the burnt gas of a knocking engine. The first simultaneous determinations of temperature and [CO2] are also reported; so far these are reliable only during the compression stoke.

PACS

33 35 

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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • M. J. Cottereau
    • 1
  • F. Grisch
    • 1
  • J. J. Marie
    • 1
  1. 1.URA CNRS 230/Coria-Universite de RouenMont Saint AignanFrance

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