进气门晚关米勒循环对柴油机燃烧和排放影响的研究

doi:10.3969/j.issn.1000-1093.2015.08.002

兵工学报 ›› 2015, Vol. 36 ›› Issue (8): 1384-1390.doi: 10.3969/j.issn.1000-1093.2015.08.002

进气门晚关米勒循环对柴油机燃烧和排放影响的研究

魏胜利¹，刘鑫¹，冷先银²，梁昱³，纪坤鹏¹，王飞虎¹

（1.江苏大学汽车与交通工程学院，江苏镇江 212013；2.江苏大学能源研究院，江苏镇江 212013；

收稿日期:2014-12-16 修回日期:2014-12-16 上线日期:2015-10-16
作者简介:魏胜利（1978—），男，副教授，硕士生导师
基金资助:
国家自然科学基金项目（51106065、51366002）

Research on Effect of Late Intake Valve Closing Miller Cycle on Combustion and Emissions of Diesel Engine

WEI Sheng-li¹， LIU Xin¹， LENG Xian-yin²， LIANG Yu³， JI Kun-peng¹， WANG Fei-hu¹

(1.School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;2.Institute for Energy Research,Jiangsu University, Zhenjiang 212013, Jiangsu, China; 3.School of Mechanical Engineering, Guiyang University, Guiyang 550005, Guizhou, China)

Received:2014-12-16 Revised:2014-12-16 Online:2015-10-16

摘要/Abstract

摘要： 基于D6114柴油机的BOOST模型，分析了进气门晚关米勒循环对柴油机燃烧和排放的影响。结果表明：推迟进气门关闭时刻可以减小压缩阶段的压力和温度，从而使滞燃期增长；但是由于缸内工质的减少，缸内平均温度和碳烟排放升高；增压压力的提高可以弥补进气损失，研究发现进气门晚关结合提高增压压力及推迟喷油，可同时降低NO_x和碳烟的排放；在保持爆发压力与原机相同时，采用米勒循环度M60、喷油正时推迟2°CA的方案，油耗降低4 g/（kW·h），碳烟排放降低6%，而NO_x的排放量降低了31%.

关键词: 动力机械工程, D6114柴油机, 米勒循环, NOx排放, 燃油经济性

Abstract: The effect of late intake valve closing (LIVC) Miller cycle on combustion and emissions of D6114 diesel engine is analyzed based on a BOOST model. The results show that the closing time of intake valve can be delayed to decrease the compression pressure and the temperature, thus increasing the ignition delay period. Due to lacking of oxygen, the average in-cylinder temperature and soot emission increase. The boost ratio can be enhanced to compensate the loss of intake. It is also found that the late closing of LIVC, in conjunction with the increase in boost pressure and the delay of injecting time, can simultaneously reduce NO_x and soot emission. When the peak pressure is the same as that in the original engine, the fuel consumption is 4 g/(kW·h) lower than that the original engine, the soot emissions are reduced by 6%, and NO_x emissions are reduced by 31% by using the scheme of M60 and 2°CA of injecting time.

Key words: power machinery engineering, D6114 diesel engine, Miller cycle, NO_x emission, fuel efficiency

中图分类号:

TK42

魏胜利，刘鑫，冷先银，梁昱，纪坤鹏，王飞虎. 进气门晚关米勒循环对柴油机燃烧和排放影响的研究[J]. 兵工学报, 2015, 36(8): 1384-1390.

WEI Sheng-li， LIU Xin， LENG Xian-yin， LIANG Yu， JI Kun-peng， WANG Fei-hu. Research on Effect of Late Intake Valve Closing Miller Cycle on Combustion and Emissions of Diesel Engine[J]. Acta Armamentarii, 2015, 36(8): 1384-1390.

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进气门晚关米勒循环对柴油机燃烧和排放影响的研究

Research on Effect of Late Intake Valve Closing Miller Cycle on Combustion and Emissions of Diesel Engine

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