Author/Authors :
Khatamnezhad, H. urmia university - Department of Mechanical Engineering, اروميه, ايران , Khalilarya, S. urmia university - Department of Mechanical Engineering, اروميه, ايران , Jafarmadar, S. urmia university - Mechanical Engineering Department, اروميه, ايران , Oryani, H. urmia university - Department of Mechanical Engineering, اروميه, ايران , Pourfallah, M. babol noshirvani university of technology - Department of Mechanical Engineering, بابل, ايران
Abstract :
One promising way to achieve low temperature combustion regime is the use of a large amount of cooled EGR. In this paper, the effect of injection timing on low temperature combustion process and emissions were investigated via three dimensional computational fluid dynamics (CFD) procedures in a DI diesel engine using high EGR rates. The results show when increasing EGR from low levels to levels corresponding to reduced temperature combustion, soot emission after first increasing, is decreased beyond 40% EGR and get the lowest value at 58% EGR rate. Soot and NOx emissions are simultaneously decreased at advanced injection timing before 20.5 ºCA BTDC in conjunction with 58% cooled EGR rate in compared to baseline case.
Keywords :
Diesel Engine , Low Temperature Combustion High EGR Rates , Combustion , Emissions
