汽油和柴油混合燃料均质压燃(HCCI)的试验研究  

Experimental Research on HCCI Using Gasoline and Diesel Blended Fuels

作　　者：钟绍华[1] 张永红[1] 金国栋[2] Miroslaw Lech Wyszynski Xu Hongming 

机构地区：[1]武汉理工大学汽车系,武汉430070 [2]华中科技大学机械学院,武汉430074 [3]伯明翰大学,英国

出　　处：《内燃机学报》2007年第1期16-23,共8页Transactions of Csice

基　　金：英国贸工部资助项目

摘　　要：汽油和柴油这两种不同特性的燃料被用作HCCI发动机的燃料。汽油具有高挥发性、易雾化和易于形成混合气的特性,被用来形成均质混合气;柴油具有良好的着火性和可燃性,被用来控制自燃和限制爆震燃烧。期望这两种特性不同而又相互补充的燃料混合后能够达到一个折衷的HCCI的燃烧性能。试验在一个专用于HCCI研究的单缸发动机上实施,采用两种中等的压缩比(10．4和15)和两种HCCI模式(进气加热和负气门叠开),试验结果证实了这种期望。结果是:随着混合燃料中柴油比例的增加,对于进气加热模式,HC- CI能稳定工作所需要的进气温度有所降低,对于负气门叠开模式,缸内平均指示压力和过量空气系数的范围有所扩展,并且两种方式下HC和NOx的排放均有所减少。Gasoline and diesel, the two fuels with different properties and were blended as a fuel for HCCI operation. Gasoline fuel, with the features of high volatility, easy vaporization and mixture formation, is used to form the homogeneous charge. While diesel fuel with better ignitability is used to control autoignition and knocking in the HCCI environment. The combination of the two different fuels is expected to get good compromise in HCCI combustion. Experiments conducted with moderate compression ratios （ 10.4 and 15） and using two modes of HCCI control, i.e. intake heating and NVO （Negative Valve Overlap） received the expected results. With increasing proportion of diesel fuel in the blend, the requirement of intake temperature for knock-free HCCI operation was decreased. Excess air ratio range was extended and emissions of HC and NOx were greatly reduced over the HCCI operating range.

关 键 词：混合燃料 均质压燃 进气加热 负气门叠开 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]