乙醇供给方式对高速柴油机排放性能的影响

Experimental study of ethanol supply mode on exhaust emissions of high-speed diesel engine

为研究乙醇供给方式对高速柴油机排放的影响,在一台小型高速涡流室式柴油机上进行了乙醇燃料供给方式的试验研究,分别按进气道供给乙醇、柴油掺混乙醇方式进行了对比试验,并与供油量相同的纯柴油试验的排放进行了比较。研究结果表明:在柴油和乙醇供给量分别相同的情况下,进气道供乙醇方式比柴油掺混乙醇方式的碳烟排放低,最高降幅约16%,两者都远远低于纯柴油情况的碳烟排放;进气道供乙醇方式的CO排放也有所降低,降幅有10%,但NOx和HC排放较高。因此乙醇供给方式是影响高速柴油机性能的一个重要的因素,进气道供给乙醇方式,能降低碳烟和CO的排放。

To study the effect of ethanol supply mode on exhaust emissions of high-speed diesel engine, an experimental study of the ethanol supply mode was investigated in a high-speed, small swirl chamber diesel. The contrast experiment was used to compare the discharge index among supplying ethanol alone, ethanol-blended fuel diesel, and diesel alone through inlet. Compared with the ethanol-blended fuel diesel, the soot emissions of supplying ethanol alone reduce 16% and CO emissions decrease 10%, while NOx and HC emissions increase. The soot emissions of ethanol supplying alone and ethanol-blended fuel diesel is much lower than supplying diesel alone. The supply mode of ethanol is an important element which affects the properties of high-speed diesel engines.The supply of ethanol through inlet can substantially reduce the emissions of soot and CO.