Combustion and emission characteristics of a direct injection compression ignition engine using rapeseed oil based micro-emulsions

► A stable and homogeneous rapeseed oil based micro-emulsions was prepared. ► The main properties of the micro-emulsions were measured. ► The combustion characteristic parameters of the engine were calculated and analyzed. ► The performance and emissions characteristics of the engine were compared and studied. ► The influence of engine load and speed on micro-emulsions engine were studied.