内外部EGR控制二甲醚发动机的燃烧与排放.pdf

15 5 Vo.l 15 No. 5 2009 10 Journal of Combustion Science and Technology Oct. 2009 EGR 张俊军, 乔信起, 王 真, 管 斌, 黄 震 (, 200240) : 2-135 CO , EGR 2 . , HCCI; EGR. , EGR - 6 NO 50 @ 10 ; EGR x , NO . EGR, NO . x x : ; ; ; ; CO 2 : TK46 : A : 1006- 740( 2009) 05-0435-05 Combustion and Emission Control in DME EngineUsing Interna-lExternalExhaustGasRecirculation ZHANG Jun-jun, Q IAO X in-q,i WANG Zhen, GUAN B in, HUANG Zhen ( Key Laboratory of Pow erM ach inery and Engineering ofM in istry of Education, Shanghai JiaotongUn ivers ity, Shanghai 200240, Ch ina) bstract: A 2-135 CI engine was m od ified to carry out the test for com bustion and em ission control us ing in ternal-external exhaust gas recircu lation( EGR) by port asp iration and in-cylinder injection of d mi ethyl ether ( DME). The resu lts show that the overall combustion process comprisesHCC I combustion, pre-m ixing and diffusion combustion, and that the combus- tion characteristic is m ain ly decided by internal-external EGR rate. The resu lts also show that at an early fuel delivery ad- vance angle, NO e