Diesel Emissions

Advanced diesel engine technologies combining in-cylinder combustion control for low engine-out emissions with advanced aftertreatment technologies and using ultra-low sulfur diesel (ULSD) fuel can meet EPA emissions standards. Advanced combustion strategies such as exhaust gas recirculation (EGR) lower engine-out NOx emissions. Aftertreatment devices such as NOx adsorbers and selective catalytic reduction (SCR), reduce NOx emissions by up to 90 percent. Diesel particulate filters and oxidation catalysts lower particulate matter emissions by over 95 percent. A combination of these aftertreament 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.