In the present work, an attempt has been made for the effective utilization of Compressed Natural Gas (CNG) in diesel engine. A four stroke, single cylinder diesel engine was modified to work on dual fuel mode. The effect of CNG flow rate and Exhaust Gas Recirclulation (EGR) on the performance and emissions of the dual fuel engine was studied. The variables considered for the tests were different CNG flow rates (0.2, 0.3, 0.4, 0.5, 0.6 and 0.7 kg/hr), EGR (0 %, 4.28 %, 6.63 % and 8.12 %) and loads (25 %, 50 %, 75 % and 100 % of full load). From the test results, it was observed that the EGR rate of 4.28 % results in better brake thermal efficiency and lower CO and NOx emissions than other ERG rates at 25 %, 50% and 75% of full loads. At full load, EGR rate of 8.12 % results in higher brake thermal efficiency and lower NOx emissions.

1.
Karim G A, “An examination of some measures for improving the performance of gas fueled diesei engine at light lead,” SAE 912366, 1991.
2.
Karim G A, Gunea C and Razavi M R M, “The effect of pilot fuel quantity on duel fuel engine ignition delay,” SAE 982453, 1998.
3.
Poonia M P, Ramesh A and Guar R R, “Experimental investigation of the factors affecting the performance of LFG-Diesel dual fuel engine,” SAE 1999-01-1123, 1999.
4.
Satoshi S M, Yasuharu K, Teruhiro Sakurai and Toshiji, “Operating characteristics of a natural gas fired homogenous compression engine,” SAE paper 2001-01-1034.
5.
Hundleby G E, “Low emissions approaches for heavy duty gas powered urban vehicles,” SAE paper 892134.
6.
Kazuhisa Okamoto, Fu-Rong Zhang, Satoshi Shimogata and Fujio Shoji, “Development of a late intake valve closing miller cycle for stationary natural gas engines-effect of EGR utilization,” SAE paper 972848.
7.
Shrinivas Rao B R, Mohanan P, Suresh Bekal and Samaga B S, “Some experiments on a duel fuel diesel engine with injection of vegetable oils and induction of liquefied petroleum gas,” Proceedings of the International Conference on New Millennium - Alternative Energy Solutions for Sustainable Development, PSG, Coimbatore, India, 2003.
8.
Ladommatos N, Abdelahalim and Zhao H, “Effects of exhaust gas recirculation temperature on diesel engine combustion and emissions,” Proc Instn Mech Engrs, Vol 212, Part D, 1998
This content is only available via PDF.
You do not currently have access to this content.