供油提前角对柴油/甲醇混合燃料燃烧排放性能的影响  

Effect of Fuel Supply Advance Angle on Combustion and Emission of Diesel Engines Fuelled with Diesel/Methanol Blend

作　　者：胡毅[1] 蒋德明[1] 黄佐华[1] 魏奇[1] 王锡斌[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《内燃机工程》2005年第4期1-4,共4页Chinese Internal Combustion Engine Engineering

基　　金：国家重点基础研究资助项目(2001CB209206)

摘　　要：添加助溶剂并使用超声波振动形成混合均匀的柴油/甲醇混合燃料,通过柴油机台架试验,分析供油提前角变化对柴油/甲醇混合燃料燃烧排放的影响。试验结果表明:供油提前角提前,柴油/甲醇混合燃料的有效燃油消耗率降低。随着供油提前角减小,混合燃料滞燃期缩短,供油提前角为21°CA时,混合燃料的燃烧持续期最短,增加或减少供油提前角都将延长燃烧持续期。供油提前角变化对柴油/甲醇混合燃料的排放有较大影响,推迟供油,混合燃料的烟度排放和CO排放增加,NOx排放与HC排放降低。A well-mixed and stabilized diesel/methanol blend was realized by adding additives and supersonic treatment. The combustion and emission of the diesel/methanol blend was anaysed for a diesel engine under different fuel supply advance angles. The results showed that the brake specific fuel consumption decreased with the increase of fuel supply advance angle, and the ignition delay of blend reduced with the decrease of fuel supply advance angle. The combustion duration got the shortest value at the fuel supply ad-vance angle of 21°CA. With the decrease of fuel supply advance angle, exhaust CO and smoke emissions increased, while exhaust HC and NO. decreased.

关 键 词：内燃机 柴油甲醇混合燃料 供油提前角 燃烧 排放 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]