The influence of compression ratio and the interaction between fuel spray and piston bowl have been the subject of a Brighton-led project funded by the DTI with Ricardo UK, Ford and Imperial College, London. The university?s scientists developed key sub-systems for a low-emission, efficient, cost-effective and durable heavy-duty truck engine, aiming at 'near zero' emissions. Engineers showed that early pilot injections improved the trade-off between Particulate Matter (PM) and Nitrogen Oxides (NOx) at 25 per cent engine load, and that post-injections reduced soot emissions by a factor of at least two at 50 per cent load.
"Today's injectors are capable of very fine control and exceptionally quick response," said Professor Heikal. "Where we once used one main injection of fuel, with a pre- and a post-injection, we now typically use at least five or six pulses of injection to shape the heat release, which is central to improved efficiency. Our latest research is focusing on waste heat recovery, aiming for more efficient total thermal management. Alongside this, we?re looking at a constant increase in the accuracy of fuel injection control using state-of-the-art technology."
A £7million government grant has been awarded for the development of a new engineering centre of excellence