3.392μm赤外吸収法を用いたエンジンシリンダ内点火栓近傍炭化水素系燃料濃度計測 : 実用機関への適用(熱工学,内燃機関,動力など)

概要

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An infrared absorption method was used to determine the fuel concentration with a 3.392μm He-Ne laser. The effects of pressure and temperature on the molar absorption coefficients of hydrocarbon fuels were clarified, so that it increased with increasing temperature and decreased with increasing pressure. Molar absorption coefficient of multi-component fuel like gasoline can be estimated using molar absorption coefficient of each component and considering mass balance. By exchanging an ordinary spark-plug for a spark-plug with a developed sensor in which light can pass through mixture in the combustion chamber, successive measurement of fuel concentration was performed in a spark-ignition engine. The effects of liquid droplets, mechanical vibration, and other gas like H_2O on measurement accuracy were discussed.
2004-02-25