Browse Publications Technical Papers 2011-26-0027

Catalyst Technologies for Gasoline Engines with Respect to CO 2 Reduction 2011-26-0027

Besides the further reduction of the harmful gaseous emissions (HC, CO and NOx) to reach upcoming emission limits, the discussion on lowering the CO₂ emissions is omnipresent. From engine development point of view further optimization of the stoichiometric-operated gasoline engine as well as the introduction of lean-operated engines are the main development trend.The emission control system can support the engine development by dedicated catalyst technologies as presented in this paper.A new family of TWC technologies offers to tune the catalyst system to the engine performance and the back pressure requirement - which helps to reduce CO₂ emissions. In addition these technologies show improved performance in HC, CO, NOx light-off, and in CO and NOx conversions under dynamic conditions - this again can positively impact the CO₂ emissions as less harsh heating strategies for cold start is required.By further optimization of the aftertreatment system with regard to system integration (catalyst volume, precious metal distribution, calibration) a considerable reduction in precious metal is realized with improved overall performance when compared to the current series applications.


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