大量EGR無煙低温ディーゼル燃焼の未燃炭化水素および一酸化炭素排出に及ぼす二段燃料噴射の効果(熱工学,内燃機関,動力など)

概要

論文の詳細を見る
The unburned hydrocarbon (UHC) and carbon monoxide (CO) emissions from ultra-high EGR low temperature diesel combustion can be attributed to lowered combustion temperature due to EGR and existence of under-mixed fuel-rich mixture around spray tip, over-mixed fuel-lean mixture near injector, and fuel missing the piston bowl. Two-stage injections have the potentials to reduce UHC and CO emissions with decreasing these mixtures. In this study, the effects of two-stage fuel injection including the dwell between the two injections and fuel quantity in each injection on the UHC and CO emissions were investigated. With optimized dwell and injection ratio, the two-stage injection can reduce UHC and CO emissions but these emissions are still at high levels in the regime of low-oxygen low-temperature combustion.
2010-06-25