火花点火发动机燃用DME-LPG混合燃料的性能  

Performances of spark ignition engine fueled with DME-LPG blends

作　　者：王恒[1] 祁东辉[1] 边耀璋[1] 

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《交通运输工程学报》2004年第3期95-98,126,共5页Journal of Traffic and Transportation Engineering

基　　金：陕西省自然科学基金项目(99C07)

摘　　要：通过在火花点火式发动机燃用二甲醚混合燃料与汽油的对比试验,评价了二甲醚混合燃料的不同组分在发动机上的应用特性,分析了由二甲醚、液化石油气和甲醇组成的两种配比的混合燃料发动机的燃料经济性能、动力性能、怠速时的排放性能。结果表明:与燃用90#汽油相比,二甲醚混合燃料的抗爆性能好;在燃料供给和点火系统稍作调整后,发动机燃用二甲醚 液化石油气混合燃料在低转速和中等转速时,其功率高于汽油机,在高转速时功率低于汽油机,在全部负荷工况下二甲醚 液化石油气混合燃料消耗率低于汽油;怠速时二甲醚 液化石油气混合燃料HC、CO、NOx排放量比90#汽油有显著下降。这说明发动机燃用二甲醚 液化石油气混合燃料基本达到燃用汽油的水平。By contrasting the testing results of engine fueled with dimethyl ether(DME) blends and gasoline, this paper evaluated the practical characteristics of different component and the ratio of DME blends on spark ignition engine. The investigation and analysis of power performance, fuel economy and idle emissions were carried out on spark ignition engine fueled with two different ratio blends, which were made up of DME, liquefied petroleum gas(LPG) and methanol. The results indicate that the antiknock property of DME-LPG blends is better than that of gasoline, through adjusting the fuel supplying and ignition system of engine, the power of DME-LPG blends is greater than that of gasoline at low and middle engine speed, lower than that of gasoline at high engine speed, the specific fuel consumption of DME-LPG blends is lower than that of gasoline under all range of load, the HC, CO and NO x emissions of DME-LPG blends are obviously reduced compared with gasoline under idling condition. The performance of DME-LPG blends engine is generally the same as that of gasoline engine.

关 键 词：内燃机 代用燃料 发动机性能 火花点火发动机 二甲醚 汽油 二甲醚-液化石油气混合燃料 

分 类 号：U473.2[机械工程—车辆工程]