摘要
以一台柴油机为原型机,增加进气道汽油喷射系统,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性能进行深入的研究。研究显示:汽柴油双燃料发动机缸内燃烧压力峰值随着主喷正时的推后而升高;油耗水平随着主喷正时的推后而恶化;柴油主喷油量对NOx排放影响不明显,NOx排放随着主喷正时推后呈现单调降低趋势;Soot排放随着主喷正时推后呈现降低趋势。同时在相同主喷正时条件下,主喷油量越低,Soot排放越低。汽柴油双燃料发动机THC排放和CO排放均较高。
A prototype diesel engine was modified into dual-fuel engine which was added gasoline injection system 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 results indicated： the peak valve of combustion pressure will rise as diesel main injection timing retards; diesel main injection timing delayed will results in deterioration of fuel consumption; NO~ emission is not sensitive in change of the quantity of diesel main injection, while it will reduce as diesel main injection timing is postponed; Soot emission will drop as diesel main injection timing is postponed; the THC and CO emission of gasoline/diesel dual-fuel engine is usually very high.
出处
《小型内燃机与车辆技术》
2015年第3期11-16,共6页
Small Internal Combustion Engine and Vehicle Technique
关键词
汽柴油双燃料
经济性能
燃烧特性
排放性能
Gasoline/diesel dual -fuel, Economic characteristic, Combustion characteristic, Emissioncharacteristic
