甲醇燃料对实现HCCI燃烧小负荷工况的实验研究

摘要

近年来国内外对内燃机燃料的研究日趋深入，含氧燃料成为重要的研究课题。甲醇燃料相对于乙醇和汽油燃料表现出了较好的自燃性能，并且甲醇有较高的耐废气能力，这些对HCCI小负荷燃烧的燃油经济性非常有利。通过实验对比甲醇和汽油燃料在废气管理过程中的出现的问题，研究甲醇对小负荷HCCI燃烧拓展的影响。研究发现甲醇燃料对HCCI小负荷着火燃烧有很大的好处，而且甲醇燃料的使用燃烧效率得到提高以后，可以大幅降低HC和CO的排放，但是对于HCCI燃烧运行的负荷边界而言，更容易引起发动机粗暴燃烧。%With researches on the fuel of internal combustion engine are getting further home and abroad in recent years,oxygenated fuel has become an important research object.Compared with ethanol and gasoline,methanol shows the better spontaneous combustion per-formance and higher exhausts tolerance ability which is favorable to the fuel of economic HCCI combustion at low load condition. Through experimental comparisons of problems in exhausts treatment between methanol and gasoline,the effects of methanol on HCCI low-load combustion development have been studied.Research shows that methanol fuels do much promotion to HCCI low-load com-bustion ignition and reduce the emission of HC and CO greatly with the improvement of methanol fuel combustion efficiency while it’s more likely to cause rough combustion of the engine on the operating load boundary of HCCI combustion.