Search Results

In the Premixed-Charge Compression Ignition (PCCI) combustion mode, fuel is injected fairly early before top-dead-center (TDC) of compression compared to the conventional near-TDC injection combustion mode. Early fuel injection into a low temperature in-cylinder environment results in long ignition delay and high peak heat release rate. Since the onset of ignition occurs after the end of injection, importance of spray and bowl induced flow field and mixing is not so obvious. In the present work, computational analysis is used to investigate the effects of spray-bowl interactions on PCCI combustion and emissions at a light-load (4Bar BMEP) operation of a medium-duty, direct injection diesel engine. Multidimensional CFD code KIVA-3V coupled with detailed chemical kinetics is used to perform combustion simulations.