水素アシストディーゼル燃焼の研究 : 第1報,水素吸入がディーゼルエンジンの燃焼・排気特性に及ぼす影響(熱工学,内燃機関,動力など)

概要

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The present study experimentally investigated the performance and emission characteristics of a diesel engine with hydrogen added to the intake air at late diesel-fuel injection timings. The diesel-fuel injection timing and the hydrogen fraction in the intake mixture were varied while the available heat produced by diesel fuel and hydrogen was kept constant at a certain value. As the hydrogen fraction was increased, NO first deceased, attained minimum, and then increased. The maximum rate of incylinder pressure rise also showed minimum at 10vol% hydrogen fraction. The indicated thermal efficiency was almost constant or slightly increased with small amount of hydrogen. A combination of hydrogen addition and late diesel-fuel injection timing contributed to low temperature combustion, in which NO decreased without the increase in unburned fuel.
2010-12-25