CAJ | 학술논문

利用现代高压共轨直喷柴油机，在ESC循环和负荷特性模式下系统研究煤制柴油这一新型清洁燃料的常规和非常规排放特性，并与燃用传统柴油时的排放特性进行了比较．其中负荷特性试验模式采用了3个转速，每个转速采用4个负荷．研究表明，高转速高负荷条件下煤制柴油能大幅降低NOx排放，怠速和低负荷条件下能大幅降低HC和CO排放，高转速低负荷下能大幅降低PM排放．PM排放随燃料中煤制柴油含量增加而下降，而HC、CO、NOx排放在煤制柴油体积分数为30%和50%时基本相同．燃料中煤制柴油体积分数增加，PM粒径变小，数目增多.
이용현대고압공궤직분시유궤，재ESC순배화부하특성모식하계통연구매제시유저일신형청길연료적상규화비상규배방특성，병여연용전통시유시적배방특성진행료비교．기중부하특성시험모식채용료3개전속，매개전속채용4개부하．연구표명，고전속고부하조건하매제시유능대폭강저NOx배방，태속화저부하조건하능대폭강저HC화CO배방，고전속저부하하능대폭강저PM배방．PM배방수연료중매제시유함량증가이하강，이HC、CO、NOx배방재매제시유체적분수위30%화50%시기본상동．연료중매제시유체적분수증가，PM립경변소，수목증다.
This paper describes the experimental results of a common-rail engine fuelled with Fischer-Tropsch(F-T) diesel, conventional diesel and their blends. Both regulated and non-regulated emissions were measured in order to exploit at the best the synergies between the engine technology and the fuel properties. Experiments were performed in European steady state cycle(ESC) and load-characteristic modes. In load-characteristic modes, the tested engine was operated at three speeds, each with four different engine loads. The experimental results showed that the NOx emission benefit of F-T fuel was more evident at high speed and high load, and larger benefits of HC and CO emissions were obtained at the idle operating point and low-load points. Reduced particulate matter(PM) emissions were proportional to the F-T fractions in the blends, while a 50% or 30%blend of F-T could produce the same gaseous reduction as the neat F-T fuel. PM emission reductions with F-T fuel and its blends were more dependent on engine operating condi-tions than gaseous emission reduction. The PM benefits were more evident at high speed and low load. The reductions of the mean particle diameters were almost proportional to the amount of F-T in the blend. The particle size distribu-tions were wider and the total particle number concentrations were larger with blends than those with neat F-T fuel or diesel fuel.