Diesel Premix and EGR to reduce Emission

What is it about?

In the present work, diesel was used as a premixed fuel along with the conventional injection of diesel with a premixed ratio of 0.25. The premixed charge was burned in the cylinder along with the fuel directly injected into the cylinder by a conventional injection system. To control nitrogen oxide(s) (NOx) emissions, Exhaust Gas Recirculation (EGR) was adopted and the exhaust gas was varied from 10% to 30% in steps of 10%. Based on the experiments conducted on a Compression Ignition Direct Injection (CIDI) engine, it was found that unburnt hydrocarbons, carbon monoxide, and soot emissions increase. Soot emission decreases with up to 20% EGR and increases when EGR was increased beyond 20%. Hence 20% EGR was found to be the optimum use for DPMCI mode with a premixed ratio of 0.25. Due to the lean operation, significant reduction in NOx was achieved with the DPMCI

Featured Image

Why is it important?

In the present experimental work, diesel was used as a premixed fuel along with the conventional injection of diesel blend with premixed ratios (Rp) of 0.25 and with or without EGR compared with the CIDI engine. Diesel fuel was injected into the intake manifold to form premixed charge. The charge was burned along with the fuel directly injected into the cylinder. Conclusions are drawn based on experiments conducted in DPMCI mode with diesel as the premixed fuel with a premix ratio of 0.25 and 10%, 20%, and 30% EGR. The effects on performance, emissions, and combustion are analyzed in depth.

Perspectives