Technical Paper
Case Studies of Urea SCR Integration on Passenger Cars Monitoring of Urea Inside the Tank During Hot and Cold Environment Test Missions
2008-04-14
2008-01-1181
SCR technology allows engines with high raw NOx generation to comply with new exhaust emission regulations, especially Light Duty Vehicles (pick-up trucks, SUV's and larger passenger cars). The complete SCR system consists of a tank for storing urea fluid, a pump, injection system and a dedicated catalyst. The Automotive Industry has defined and standardized a urea fluid called AdBlue™ which is now being implemented worldwide. To comply with the more stringent regulations (Euro 4 to 6), Europe selected SCR as the preferred technology with market introduction in January 2005 (infrastructure, commercial introduction...). This choice is likely to be standardized on a global scale, especially in the US and Asia, on HDV's and LDV's by 2010. For US Tier 2 Bin 5 requirements, the Automotive Industry will adopt the European approach by implementing SCR with on board urea fluid storage.