Study on methanol premixed coupled with EGR to achieve ultra-low emissions in diesel engine

In this paper, an experimental investigation on achieving ultra-low emissions in diesel engine was carried out using intake premixed methanol and EGR technology. The influence of introduction method combustion performances were studied comprehensively. results show that NOx (<0.4g/kWh) PM (<10mg/kWh) can be achieved simultaneously dual fuel (DMDF) highly low-temperature mode. Compared with low-pressure (LP-EGR), the excess air coefficients under high-pressure (HP-EGR) drops more significantly. At same rate, in-cylinder mean temperature equivalent mixture are higher HP-EGR conditions, which efficiency, lower CO THC emissions. maximum brake thermal efficiency is 9.6% than EGR.