Diesel Emissions

Advanced diesel engine technologies combine in-cylinder combustion control for low engine-out emissions with advanced after-treatment technologies and ultra-low sulfur diesel (ULSD) fuel to meet EPA emissions standards. Advanced combustion strategies such as exhaust gas recirculation (EGR) lower engine-out NO_x emissions. After-treatment devices such as NO_x adsorbers and selective catalytic reduction (SCR), reduce NO_x emissions by up to 90 percent. Diesel particulate filters and oxidation catalysts lower particulate matter emissions by over 95 percent. A combination of these after-treament technologies is used to meet stringent emissions standards.

Visit the AFDC's selective catalytic reduction, Diesel Exhaust Fluid, and NO_x adsorber pages to learn more about these promising technologies. Visit the Diesel Technology Forum for additional clean diesel technology descriptions.

To perform in-depth analyses of alternative fuel versus conventional fuel emissions, see the AFDC Emissions Tools page.