Comparative study on Gasoline Homogeneous Charge Induced Ignition (HCII) by diesel and Gasoline/Diesel Blend Fuels (GDBF) combustion

► Both HCII and GDBF modes can achieve a similar or even higher thermal efficiency than diesel CI combustion. ► The combustion duration in both HCII and GDBF modes shortened significantly. ► Soot emissions reduced dramatically in HCII and GDBF modes, with a maximum reduction of 90%. ► The HC emissions in GDBF mode remained almost unchanged, while the HC emissions in HCII mode increased dramatically. ► Both HCII and GDBF modes can achieve low temperature combustion with extremely low soot and NO emissions.