摘要
在增压中冷柴油机上进行外部循环EGR回路喷甲醇的试验研究,研究了喷入不同的甲醇量对柴油机性能的影响。结果表明,EGR回路喷入的甲醇量越多,负荷特性的烟度会逐步降低,NOx在较小的喷醇量下会有所下降,在较大的喷醇量下有所升高;HC排放在所有负荷都会增加,小负荷时增幅更大;缸压峰值和放热率峰值也会随着喷醇量的增加而增加,峰值对应的曲轴转角有后移的趋势,燃烧起始点滞后。
Experimental study was carried out on the turbocharged and intercooled diesel with methanol spray in the external EGR circulation loop. The effects of different amounts of injected methanol on diesel engine performance are studied. The results showed that the more the amount of methanol injected into the EGR circuit, the smoke of load characteristics will be gradually reduced, NOx in the small amount of alcohol spray will decline, and increase in the larger amount of alcohol spray; HC emissions increased in all load, but increased more under a small load. Cylinder pressure peak and peak heat release rate will increase with the spray amount of alcohol increases, the peak corresponding to the crank angle has a tendency to shift back, and the starting point of the combustion lags.
出处
《小型内燃机与车辆技术》
CAS
2015年第4期91-96,共6页
Small Internal Combustion Engine and Vehicle Technique
基金
2012A610169宁波市自然科学基金
Y200908480浙江省教育厅科研项目
lj2013201 2013年度浙江省高职高专院校专业带头人专业领军项目
关键词
EGR
甲醇
碳烟
NOx
缸压
放热率
Exhaust gas recirculation, Methanol, Soot, NOx, Cylinder pressure, Heat release rate