电控共轨系统降低排放的试验研究.pdfVIP

30 4 Vo l. 30 No . 4 2009 8 Chinese Internal Combu stion Eng ine Eng ineering Aug ust . 2009 : 1000- 0925 2009) 04- 0034- 04 300065 , , , 116023) Experimental tudy on Controlling Diesel Engine Emission Using Pilot Injection HU Zhao-yang, XUE Dong-xin, ONG X-i geng Inst it ut e of Int ernal Com bu stion Engine, Dalian Univ er sit y o f T echnolog y, Dalian 116023, China) Abstract: A n ort hog onal array for t he pilot inject ion experiment w as desig ned, and t he eff ect s of f uel inject ion pressure and t he pilo t inject ion on em ission and fuel consumpt ion w ere invest igat ed . T he result s show t hat higher injection pressur e and sm aller injection advanced ang le can reduce em ission ; pilo t inject io n can sig nif icantly reduce N Ox , and t he pilot inject ion can get a bet ter t rade- of f betw een emission and fuel con- sum pt ion . Based on the result s, the optim um paramet ers under diff erent oper at ion co nditions were obt ained. : 按正交试验法设计试验方案, 分析了不同工况下燃油喷射压力和预喷射对排放和 燃油消耗 的影响结果表明: 较高的喷射压力和较小的喷油提前角可以降低排放; 预喷射可 大幅降低N Ox 的排放, 配合预喷射参数的优化, 可较好地实现排放和燃油消耗 的折中优化 基于结果的分析, 可获得发动机不同工况下的优化参数 : ; ; ; ; ; ; Key words: IC eng ine; diesel engine; fuel inject ion pr essur e; p ilot injection; em ission; sp ecific fuel con sumption; orthogonal experim ent : T K 42 1. 5 : A 0 1 6 [ 1] , , ECD- U2 UECU 32 : N Ox , ; : 106 ; ;