Measurement of the Combustion Gas Temperature in the Spark Ignition Engine

概要

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For the purpose of analyzing the combustion process in a spark ignition engine, it is necessary to know the combustion temperature in the combustion chamber. The author has developed a new technique of measuring the combustion temperature using the sodium line reversal method. By this new technique, it is possible to scale temperature for the output of flame radiation from the combustion chamber. The distribution of flame temperatures in the cylinder could be measured by this method even near the cylinder wall. For the purpose of measuring the flame temperature in the commercial engine, a compact sensor with prisms and optical fibers was developed. The measure values obtained form these techniques are discussed for various operating engine conditions.
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