Scania and Umicore present the next generation Exhaust Aftertreatment Systems (EATS) at the 42nd International Vienna Motor Symposium

There is a growing demand for cleaner and more energy-efficient vehicles to overcome today’s global environmental challenges. This demand translates into tighter emission regulations for commercial and passenger vehicles and the reduction of CO2 emissions. New advanced emission legislations in Europe, the US, and China are under development.

Current Euro VI EATS reaching their performance limit related to cold start and low engine load conditions. Scania recognized such a trend early and realized the potential of an improved and innovative system. The system would be able to meet future emission legislations  and enable engine calibration with significantly improved fuel consumption. 

Scania’s Twin-SCR system approach allows the EATS to remove NOx with very high efficiency at a significantly broader range of temperatures thanks to the positioning of the SCR catalysts in closed coupled position to the engine and downstream of the DPF in the EATS, respectively.

The new Twin-SCR system advantages and capabilities also came along with specific challenges on catalyst robustness, poisoning resistance, and needs for further catalyst optimization. Scania managed to optimize the Twin-SCR system to meet all relevant requirements through developments and testing in close cooperation with Umicore. 

System performance and durability are key requirements though not the only ones. The ever-growing complexity of the EATS demands that platforms are developed with global scope to keep them cost-competitive. Meeting all global regulations is thus on the requirements list, and given the system is based on Vanadium SCR catalysts, the vanadium sublimation phenomena are of particular relevance. 

Through extensive research, vanadium sublimation has been studied to support introducing the Twin-SCR platform in markets like China and the United States. This research has provided Umicore with an understanding of the phenomenon, which was key to supporting Scania and developing the next generation catalysts with reduced sublimation behavior.

Scania’s new Twin-SCR system provides the Traton group with a highly efficient aftertreatment solution that meets current global emissions requirements. Furthermore, by introducing this new architecture to the market already in 2020, Scania positions the Traton group in the lead for upcoming emission requirements by building field know-how with this next generation EATS that show potential to comply with future extended durability requirements.

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WCX Digital Summit April 13-15, 2021

At Umicore, we have seven new technical papers on the latest advances in emissions control. With more than 60 years of leadership, we are at the forefront of catalytic emissions and particulate control technology. Posting in conjunction with the SAE WCX Digital Summit, our world-class scientists and engineers cover: 

• Diesel oxidation catalyst OBD limit parts’ performance and detection
• Diesel catalyst performance degradation 
• Tailpipe particulate emissions from a turbo-powered hybrid SUV with a gasoline particulate filter
• An unconventional application of a hydrocarbon trap to meet SULEV 2020
• Secondary Emission Control towards Post China 6 Legislation
• Advantages of coated gasoline particulate filters in the CC2 position for China 6B
• Impact of lubricant ash on a CN6 after-treatment system performance of GDI vehicle

Click here to stay on the leading edge of emission control, read the abstracts and see which papers are best for your operation!