Author : Machindra Gaikwad, Keshav Jadhav and Avinash Kolekar

EGR (Exhaust gas recirculation) is one of effective method which has been used to reduce nitrogen oxides (NOx) emissions from diesel engine. Diesel-LPG (liquefied petroleum gas) dual fuel CI (compression ignition) engine with 60% energy share of LPG were used for this investigation. In present study, EGR method is used for LPG-Diesel dual fuel engine with four flow rates (5% to 20% with step 5) at ambient temperature. Experimental tests were performed on a Kirloskar CI engine (single cylinder, four stroke, water cooled) to examine engine performance and emission characteristics. Experimental results showed that the dual fuel engine without EGR gives better performance from quarter load to full load as compared to the straight diesel engine and the EGR improves the performance at part load (50% & 75%) in dual fuel engine. The emission of NOX significantly reduces with EGR and most reduction seen at 20% EGR. It is also observed that there was reduction in CO emission at part load while at no load and full load it slightly increase in case of EGR.

Keywords: LPG, Dual Fuel, CI Engine, EGR, Performance, Emission.