This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Next Generation Catalysts are Turbulent:Development of Support and Coating
Technical Paper
2004-01-1488
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Future catalyst systems need to be highly efficient in a limited packaging space. This normally leads to a design where the flow distribution, in front of the catalyst, is not perfectly uniform.
Measurements on the flow test bench show that the implementation of perforated foils for the corrugated and flat foils has the capability to distribute the flow within the channels in the radial direction so that the maximum of the given catalyst surface is of use, even under very poor uniformity indices. Therefore a remarkable reduction in back pressure is measured. Emission results demonstrate cold start improvement due to reduced heat capacity.
The use of LS - structured ( Longitudinal structured ) corrugated foils creates a high turbulence level within the single channels. The substrate lights-up earlier and the maximum conversion efficiency is reached more quickly. It can be shown that a reduced catalyst volume 300 LS Metalit support with 50 μm foil thickness creates the same efficiency, during the European Driving cycle, like a 600 cpsi with ultra thin wall ceramic support. The combination of LS type corrugated foil with perforated flat foils further improves catalyst efficiency.
Recommended Content
Authors
Citation
Bollig, M., Liebl, J., Zimmer, R., Kraum, M. et al., "Next Generation Catalysts are Turbulent:Development of Support and Coating," SAE Technical Paper 2004-01-1488, 2004, https://doi.org/10.4271/2004-01-1488.Also In
References
- „Application Guideline to define a Catalyst Layout for maximum Catalytic Effeciency” SAE - Paper # 2001-01-0929 Marsh P. Acke F. Volvo Konieczny R. Brück R. Hirth P. Emitec GmbH
- “Product Design and Development of Ultra Thin Wall Ceramic Catalytic Substrate” SAE - Paper 2002-01-0350 Aoki Yoichi Miyairi Yukio Ichikawa Yukihito Fumio Abe NGK Insulaters Ltd
- “Design Criteria for Metallic Substrates for Catalytic Converters” SAE - Paper 950789 Brück R. Diewald R. Hirth P. Kaiser F.-W. Emitec GmbH
- “Design Criteria for Metallic Substrates for Future Catalyst Applications, Part III” SAE-Paper 971027 Bergmann A. Brück R. Kruse C. Emitec GmbH
- “Close-Coupled Catalytic Converters for Compliance with LEV/ULEV and EGIII Legislation - Influence of Support Material, Cell Density and Mass on Emission Results” SAE - Paper 960261 Pfalzgraf B. Rieger M. Ottowitz G. AUDI AG
- “Das BMW SULEV ( PZEV ) Konzept - Emissionsreduzierung ohne Kompromisse Wien Motorensymposium 2002 Liebl J. Hofmann R. Melcher Th. BMW AG
- “The development of BMW Catalyst Concepts for LEV/ULEV and EUIII/IV Legislations 6 Cylinder Engine with Close Coupled Main Catalyst” SAE - Paper 980418 Otto E. Albrecht F. Liebl J. BMW AG
- “Utilization of Advanced Three-Way Catalyst Formulations on Ceramic Ultra Thin Wall Substrates for Future Legislation” SAE - Paper 2002-01-0349 Schmidt J. et.al. DaimlerChrysler AG Müller W. et. Al. OMG AG CO.KG Buckel T. et. Al. Faurecia Abgastechnik Abe F. et.al. NGK Insulaters Ltd
- “New Ultra Thin Wall Metal Catalysts for Close-Coupled Applications” SAE - Paper 980420 Brück R. Diewald R. Maus W. Wieres L. Kaiser F.-W. Emitec GmbH
- “Advanced Performance of Metallic Converter Systems, Demonstrated on a Production V8 Engine” SAE - Paper 2002-01-0347 Brück R. Müller-Haas K. Breuer J. Emitec GmbH Webb C. SWRI
- „New High-Performance Gas Flow Equalizing Metal Supports for Automotive Exhaust G Catalysts” SAE - Paper 900270 Nonnenmann M.
- 1994
- „Optimisation of Catalytic Converter Gas Flow Distribution by CFD Prediction” SAE - Paper 930780 Weltens H. Bressler H. Terres F. Neumaier H. Rammoser D. Heinrich Gillet GmbH & Co. KG
- „Niedrigstemissions-Fahrzeuge sind heute realisierbar -Neue Innovationsschwerpunkte für metallische Katalysatorträger: Kostenreduzierung und Dauerhaltbarkeit„ Maus W. Diringer J. Brück R. Emitec GmbH Symposium: Entwicklungstendenzen bei Ottomotoren in Esslingen 2002
- „Improved Cell Design for Increased Catalytic Conversion Efficiency” SAE - Paper 940932 Held Dr. et al Volkswagen AG
- „Flow Improved Efficiency by New Cell Structures in Metallic Substrates” SAE - Paper 950788 . Brück R. Diringer J. Martin U. Maus W. Emitec GmbH