Advancement in Diesel Combustion System Design to Improve the Smoke-BSFC Tradeoff

Abstract

Modern diesel engines must simultaneously provide ultra-low emissions and world-class fuel economy. To meet these requirements, many new combustion strategies require that combustion occur in an oxygen-limited and/or very high EGR environment, both of which increase the tendency for particulate emissions and reduced burn-rate. The current study utilized an iterative combination of simulations and engine experiments to identify improved combustion system designs for future diesel engines. Additionally, success in reducing soot and improving burn rate in an oxygen-limited environment opens the door to new strategies for diesel combustion in the future.