Reducing emission from the engines is very difficult task these days since emission norms are becoming very strict on NOx, HC, CO etc. Recently, duel fuel diesel engine which use Liquefied Petroleum Gas (LPG) and diesel fuel is widely employed for better emission control and fuel efficiency. Proposed system uses a Fuzzy logic approach to control the LPG flow into the engine and diesel as a pilot fuel. Also, Exhaust Gas Recirculation (EGR) system will reduce the NOx content in the exhaust gas. Both EGR and LPG are controlled by a fuzzy control system to improve the performance of the dual fuel engine.