Abstract
SCR technology has a greater potential to equip engines for which NOx raw emissions are far apart from complying with regulations unassisted, especially on Light Duty Vehicles (Pick-up Trucks and SUV) and larger passenger cars. The complete SCR system consists of a storage tank for the urea solution, a urea injection system and a dedicated catalyst. The Automotive Industry has fixed and standardized the urea solution characteristics, called AdBlueTM that may be applied worldwide. To comply with more stringent regulations, Europe has selected the SCR technology that has been in place since January 2005 (infrastructure, commercial introduction...) and SCR technology for mobile applications became a reality. This choice is likely to be generalized on a global scale, especially in the US and Asia, on HDV and LDV by 2010. For the US Tier2 Bin5 stage, the Automobile Industry will follow the European approach making on board fluids system integration a key success factor. The worldwide NOx emissions standards evolution over the 2005/2012 period forces the Automobile industry to evaluate the SCR technologies for production volume applications. The presentation will cover the roadmap of worldwide SCR market implementations, especially in Europe with the current commercial vehicles market segment, will review all key elements of this technology, and will give an update of the latest developments in order to implement SCR technology (urea tank) in the passenger car market segments.
Keywords: NOx, urea, cars, trucks, integration