乙二醇单丁醚-柴油混合燃料对柴油机燃烧和排放性能的影响

摘要

Experimental study on various ratios of diesel and n-butoxyether(NBE)blends on a TY1100 single cylinder DI diesel engine was conducted.Results show that NBE has good solubility in diesel.Without modification to engine, using the blend of 15％-25％ NBE and diesel, the ignition delay is slightly increased, combustion rate is increased and cylinder pressure is decreased.Engine thermal efficiency increases by 1.2％-8.1％, smoke decreases by 43％-75％, CO emission decreases by 46％-56％ at high load.NBE-diesel blend reduces HC emissions to some extent, and NOx emission is slightly decreased.%在一台TY1100轻型直喷式柴油机上研究了添加15%、25%(体积分数)的乙二醇单丁醚(NBE)的柴油混合燃料对柴油机在转速为1400r/min和2000r/min下燃烧和排放性能的影响.试验结果表明:NBE 可与柴油实现良好的互溶;在不改变柴油机结构参数的条件下,燃用柴油-乙二醇单丁醚燃料时,着火略有延迟,燃烧速度加快;缸内最大压力下降,下降程度在低负荷时不显著,高负荷大,压力升高率有所推后且稍有增加;NBE有效热效率比柴油相对提高了1.2%～8.1%,且可以显著降低柴油机的碳烟排放和CO排放,烟度下降43%～75%,CO排放下降46%～56%.可使HC的排放有一定程度的降低,其排放规律具有波动性,NOx排放稍有下降.