Duramax Diesel Exhaust After-Treatment System

Weber State University - Advanced Vehicle Systems Lab. A brief description and summary of the diesel Exhaust after-treatment system of the 2011 - 2012 GM Duramax equipped trucks. This systems allows the engine power to be increased substantially (765 lb*ft) while meeting the EPA 2010 Tier-4 emissions standards for diesels. This truck has a Ultra-low Emission Vehicle (ULEV) certification. Higher compression ratios, higher turbo Boost pressures, and higher combustion temperatures can be used to increase engine power which also results in reduced particulate matter and higher NOx emissions. Most diesel truck engine manufacturers are using this system because with the addition of a Diesel Exhaust Fluid (DEF) injector in the Exhaust system with a Selective Catalyst Reduction (SCR) system, the majority of the NOx emissions can be neutralized. These systems still use a Diesel Particulate Filter (DPF) which requires regeneration, but at less frequent intervals than with the 2007 EPA emissions standards. This is a great system, however, you must add diesel Exhaust fluid or the engine controller will eventually prevent you from driving. http://www.weber.edu/automotive This video was created and edited by John D. Kelly at WSU. For a full biography, see http://www.weber.edu/automotive/John_Kelly.html

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