Abstract
Broadband coherent anti-Stokes Raman scattering (CARS) measurements of the unburned gas temperature in a spark ignition internal combustion engine have been performed. Previously in this laboratory, CARS measurements of nitrogen spectra were used to determine the unburned gas temperature in a knocking engine using butane as the fuel.1 Recently we made measurements of the unburned gas temperature histories just prior to autoignition for several different fuels with and without proknock additives.
© 1989 Optical Society of America
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