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Many promising technologies are under research for providing alternate solutions to conventional spark and compression ignition engines in order to meet stringent emission norms. One among them is Reactivity Controlled Compression Ignition (RCCI) engines. It uses a port injected fuel similar to SI engines and the charge (air + fuel) is ignited similar to CI engines. Generally, two fuels of different reactivities are chosen for this technique. RCCI can be achieved either by injecting one fuel through port and one fuel through in cylinder or both the fuels through the intake port. In this research work, a simple and cost effective electronic fuel injection technique was established to handle both the single and dual port injection systems. The developed electronic circuit was tested on a CI engine with RCCI mode using gasoline open valve port injection and diesel in cylinder injection for a constant proportion of diesel/ gasoline (60:40) at different loads.