... of engine parameters on performance and emissions of a pilot ignited natural gas diesel engine Energy 2010;35:1129–38 [11] Wannatong K, Akarapanyavit N, Siengsanorh S, Chanchaona S Combustion and ... A2 T þ A3 T þ A4 T þ Þ ð5Þ [16] Mbarawa M, Milton BE, Casey RT Experiments and modeling of natural gas Cp ¼ð where (A0 ), (A1 ), (A2 ), (A3 ), and (A4 ) are constants, and their values are [28]: A0 ... work aims at investigating the effect of utilization of partly-cooled EGR on the combustion process and exhaust emission characteristics of a pilot ignited natural gas diesel engine A comparative...