Monday, August 27, 2012

UP unveils key emissions-test locomotive

Written by  Luther S. Miller, Senior Consulting Editor

At its J.R. Davis Yard in Roseville, Calif., Union Pacific on Aug. 22 unveiled an advanced experimental locomotive, UP 9900 that will test three emissions-reducing technologies: exhaust gas recirculation (EGR), diesel oxidation catalysts (DOC), and diesel particulate filters (DPF).

UP 9900 is the signature unit in a series of 25 locomotives, developed jointly with Electro Motive Diesel, that UP announced earlier it will use in a test of various emissions-reduction techniques throughout California.

To create the space needed to install aftertreatment technology in the body of the locomotive, engineers reduced the engine size of a long haul locomotive. The railroad expects UP 9900 to move toward the Tier 4 standard with a 45% reduction in the oxides of nitrogen emissions compared to the Tier 2 standard and an 85% reduction in particulate matter emissions based on preliminary analysis.

Union Pacific and the California Air Resources Board will jointly analyze the locomotive's emissions-reductions capability during the next 18 months.