Abstract: An experimental study is conducted on the combustion and emission characteristics of a compression ignition engine fueled with 2methylfuran (MF) and its blend with diesel fuel. The results show that incylinder pressure peak lowers when injection timing is close to top dead center (TDC) and the adoption of exhaust gas recirculation (EGR) can obviously reduce incylinder pressure peak and heat release rate. The advance of injection reduces CO emission while the retard of injection and the adoption of EGR can apparently lower NOx emission, and the use of MFdiesel blend fuel can significantly reduce soot emission. Under the same injection timing, the effects of EGR on larger particulates are more significant than that on small ones. The effects of EGR on the number concentration of particulates become larger when injection timing is closer to TDC, and under the effects of EGR, the number of large particulates increases and the mass concentration of particulates rises accordingly when injection timing is earlier than 125°CA BTDC.

Key words: 2,5-methylfuran (MF), injection timing, exhaust gas recirculation（EGR）, combustion, emissions, Particulate matter, 2-methylfuran (MF), injection timing, exhaust gas recirculation(EGR), combustion, emissions, particulate matter