Temperature Measurement and NO Determination in SI Engines Using Optical Fiber Sensors

Paper #:
  • 961922

Published:
  • 1996-10-01
Citation:
Bach, M., Reissing, J., and Spicher, U., "Temperature Measurement and NO Determination in SI Engines Using Optical Fiber Sensors," SAE Technical Paper 961922, 1996, https://doi.org/10.4271/961922.
Pages:
15
Abstract:
This paper presents a special optical fiber technique which allows to measure temperatures in SI engines using the emission bands or respectively emission lines of the temperature radiation of diatomic molecules. The measurement technique enables the detection of average temperature in a small volume element. These temperatures are used to determine the local NO concentrations using the extended Zeldovich-mechanism.First, theoretical background of both temperature and NO-determination and measurement technique including optical fiber sensors are described. Finally, the temperature and NO dependence versus crank angle are presented and discussed at different combustion chamber locations for different engine operating conditions.
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