Browse Publications Technical Papers 2011-26-0027
2011-01-19

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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