Operating range extension of RCCI combustion concept from low to full load in a heavy-duty engine

Results suggest that double injection strategies should be used for RCCI operation from low to mid load. However, from high to full load operation, single injection strategies should be used, mainly to avoid excessive in-cylinder pressure gradients. In addition, it is confirmed the suitability of RCCI combustion to overcome the soot-NOx trade-off characteristic of CDC, from 6 to 24 bar of BMEP, while improving fuel consumption.