Impact of fuels with lower reactivity on PCCI combustion in a heavy duty diesel engine

It has been shown that a low reactive fuel can indeed be used to efficiently increase Combustion Delay. This Combustion Delay in its turn helps to drastically reduce NOx emissions. Conclusions Effects of lowering fuel reactivity: •The combustion delay increases in PCCI regime. • In the PCCI regime low reactivity fuel is more efficient due to better combustion phasing. • Reactivity can be too low for ignition due to a too homogeneous, globally lean mixture. • NOx emissions are lowered because of low temperature combustion. • HC and CO emissions are increased. • Due to lean PCCI combustion, soot emissions are extemely low Future Applications