J0801-1-4 エタノール混合油とEGRの組合せによるPCCI燃焼促進(次世代燃料と新しい燃焼技術,エンジン,動カシステム(1))

概要

論文の詳細を見る
Aiming at smokeless and ultra low NOx combustion, the effects of ethanol blend and EGR on ignition delay and NOx-PM trade-off have been investigated using a single cylinder direct injection diesel engine with the compression ratio of 17.8. Concluding remarks are as follows ; (1) Ignition delay increases with increase in the ethanol blend ratio, and also increases by increasing the EGR ratio, resulting in promotion of the premixing. (2) In the case of the 50% ethanol blend fuel, PM was reduced resulting from a remarkable increase in ignition delay even when the EGR ratio is increased. (3) PM is a function of the mass rate of diffusive combustion m_d and the EGR ratio X_<EGR>, where m_d is dominated mainly by the injection quantity of gas oil. (4) Very low levels of NOx and PM could be achieved without deterioration of the thermal efficiency by promotion of the premixing resulting from a large ignition delay.
社団法人日本機械学会の論文
2009-09-12