预喷策略对乙醇/F-T柴油双燃料发动机燃烧和排放的影响
Effect of pilot injection strategy on combustion and emissions of ethanol/F-T diesel dual-fuel engine
在一台经乙醇喷射系统改造的四缸四冲程共轨柴油机上通过试验研究了柴油预喷策略对乙醇/F-T双燃料发动机燃烧和排放性能的影响。结果表明:燃烧特性参数随预喷正时的变化呈非线性变化,且差异较小;随着预喷正时的提前,碳烟(soot)、碳氧化物(NOx)和一氧化碳(CO)有降低的趋势;随着预喷油量的增加,燃烧压力峰值、燃烧持续期、CO和soot增加,CA50 更接近上止点(TDC),放热率峰值减小,滞燃期缩短。预喷油量对乙醇/F-T柴油双燃料发动机的影响更为显著。
The effects of F-T diesel pilot injection strategy on combustion and emission performance of an ethanol/F-T dual-fuel engine were studied experimentally on a four-cylinder four-stroke common rail diesel engine modified by ethanol injection system.The results show that the combustion characteristics change nonlinear with the change of pilot injection timing,and the difference is small.With the advance of pilot injection timing,soot,carbon oxides(NOx)and carbon monoxide(CO)tended to decrease;With the increase of pilot injection amount,the peak value of combustion pressure,combustion duration,CO and soot increased,CA50 was closer to top dead center(TDC),the peak value of heat release rate decreased,and the ignition delay period shortened.The influence of pre-injection amount on ethanol/F-T diesel dual fuel engine is more significant.
陈东东;杨甜甜;王铁;李国兴;
太原理工大学 车辆工程系,太原 030024;太原理工大学 车辆工程系,太原 030024;太原理工大学 车辆工程系,太原 030024;太原理工大学 车辆工程系,太原 030024;
TK473.1
pilot injection strategy dual-fuel combustion mode ethanol/F-T diesel combustion and emissions
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