A parametric investigation of HCCI combustion to reduce emissions and improve efficiency using a CFD model approach

► A sample engine was simulated by CFD model. ► The effects of various parameters on HCCI combustion were analyzed. ► The ignition timing could control low and high temperature reactions. ► Air-fuel equivalence ratio could control low and high temperature reactions. ► Cooled external EGR can delay the start of combustion (SOC) effectively.