摘要
以一台柴油机为原型机,增加进气道喷射汽油系统,实现进气道预混喷射汽油缸内直接喷射柴油引燃的燃烧模式,对汽柴油双燃料发动机进行深入的性能研究。研究结果显示:随着柴油主喷正时推后,缸内燃烧压力和放热率第二峰值对应相位随之推后;同时,NOx排放随着柴油主喷正时推后得到有效改善,Soot排放随着柴油主喷正时推后有所恶化;柴油主喷正时的推后导致汽柴油双燃料发动机燃油消耗率上升。
A prototype diesel engine was modified into dual-fuel engine, to which gasoline injection system was added for realizing the premixed combustion model. The performance of gasoline/diesel dual-fuel engine was studied deeply, depending on gasoline injected into intake manifold and ignited by diesel directly injected into cylinders. The result indicated： as diesel main injection is retarded, the relative crank angles of second peaks of combustion pressure in-cylinder and heat release rate also are retarded; meanwhile, NOx emission is improved and soot emission deteriorates with diesel main injection being retarded; the retard of diesel main injection results in increase of fuel consumption of gasoline/diesel dual fuel engine.
出处
《小型内燃机与车辆技术》
2015年第5期1-6,共6页
Small Internal Combustion Engine and Vehicle Technique
关键词
汽柴油双燃料发动机
柴油主喷正时
缸内燃烧压力
NOX排放
Gasoline/diesel dual fuel engine, Diesel main injection timing, Combustion pressure in-cylinder, NOx emission
