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	用复合稀释燃烧改善直喷汽油机中小负荷油耗
	王建昕 ; 宋涛 ; 刘辉 ; 王志 ; WANG Jianxin ; SONG Tao ; LIU Hui ; WANG Zhi
	2016-03-30 ; 2016-03-30
关键词	汽油机 缸内直喷 复合稀释燃烧 废气稀释 空气稀释 燃油消耗率 gasoline engine gasoline direct injection(GDI) lean dilution combustion exhaust gas dilution air dilution fuel consumption TK411.2
其他题名	Lean dilution combustion(LDC) for improving fuel economy of gasoline direct injection engine at part-load
中文摘要	为了降低直喷汽油机的泵气损失、提升热效率,提出了将稀薄燃烧与废气稀释相结合的复合稀释燃烧(LDC)的路线。在一台缸内直喷汽油机上进行了中小负荷下的试验,以研究影响复合稀释燃烧的因素,测量了发动机燃油经济性、燃烧特性及排放特性。结果表明:在200~600 kPa的平均有效压力下,复合稀释燃烧带来了4%~6%的油耗改善,同时,发动机的NOx排放不会急剧升高。对燃料能量分配的分析表明:稀释燃烧降低了发动机传热损失和泵气能量损失。因而,验证了复合稀释燃烧的可行性。; A concept of lean dilution combustion(LDC) was proposed for gasoline direct injection(GDI) engines with combining lean dilution burn and exhaust gas dilution to reduce pumping loss and to improve brake thermal efficiency.The influential factors of LDC were investigated by experiments on a GDI engine at partload to measure the fuel economy(fuel energy distribution),the combustion characteristics,and the emission characteristics of the engine.The results show that the fuel economy is improved 4%—6% more at the engine brake mean effective pressure of 200—600 kPa,without too much NOx emissions by employing LDC.Fuel energy distribution indicates that the LDC reduces the engine loss of heat transfer and pumping,and the LDC mode is proved to be feasible.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144734]
专题	清华大学
推荐引用方式 GB/T 7714	王建昕,宋涛,刘辉,等. 用复合稀释燃烧改善直喷汽油机中小负荷油耗[J],2016, 2016.
APA	王建昕.,宋涛.,刘辉.,王志.,WANG Jianxin.,...&WANG Zhi.(2016).用复合稀释燃烧改善直喷汽油机中小负荷油耗..
MLA	王建昕,et al."用复合稀释燃烧改善直喷汽油机中小负荷油耗".(2016).

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