This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Influence of Cell Shape Between Square and Hexagonal Cells
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 03, 2003 by SAE International in United States
Annotation ability available
Developing ultra thin wall ceramic substrates is necessary to meet stricter emissions regulations, in part because substrate cell walls need to be thinner in order to improve warm-up and light-off characteristics and lower exhaust system backpressure.
However, the thinner the cell wall becomes, the poorer the mechanical and thermal characteristics of the substrate. Furthermore, the conditions under which the ultra thin wall substrates are used are becoming more severe. Therefore both the mechanical and thermal characteristics are becoming important parameters in the design of advanced converter systems.
Whereas square cells are used world-wide in conjunction with oxidation and/or three-way catalysts, hexagonal cells, with features promoting a homogeneous catalyst coating layer, have found limited use as a NOx absorber due to its enhanced sulfur desorption capability.
This paper is intended to clarify the structural advantages of both square and hexagonal cells, including mechanical and the thermal characteristics, to securely use ceramic substrates in severe conditions while meeting future stricter emissions regulations.
|Technical Paper||Hexagonal Cell Ceramic Substrates for Lower Emission and Backpressure|
|Technical Paper||NO 2 -Formation in Diesel Particle Filter Systems|
|Technical Paper||Material Corrosion Investigations for Urea SCR Diesel Exhaust Systems|
CitationTanaka, M., Ito, M., Makino, M., and Abe, F., "Influence of Cell Shape Between Square and Hexagonal Cells," SAE Technical Paper 2003-01-0661, 2003, https://doi.org/10.4271/2003-01-0661.
Advanced Catalysts for Emission Controls
Number: SP-1756; Published: 2003-03-03
Number: SP-1756; Published: 2003-03-03
- Becker E. Robert Watson Richard J. “Future Trends in Automotive Emission Control” SAE 980413
- Kishi Noriyuki Kikuchi Shinichi Seki Yasunari Kato Akira Fujimori Koichi “Development of the High Performance L4 Engine ULEV System” SAE 980415
- Otto E. Albrecht F. Liebl J. “The Development of BMW Catalyst Concepts for LEV / ULEV and EU III / IV Legislations 6 Cylinder Engine with Close Coupled Main Catalyst” SAE 980418
- Omoto Hiroaki Kobayashi Takeshi Ishikawa Kouji Yamada Teiji “Catalyst Design for Meeting Stringent LEV-2 NOx Regulation” SAE 2002-01-0348
- Schmidt J. Franz J. Merdes N. Brady M. J. Mueller W. Lindner D. Bog T. Clark D. Buckel T. Stoepler W. Henninger R. Ermer H. Abe F. Makino M. Kunz A. Vogt C. D. “Utilization of Advanced Three-Way Catalyst Formulations on Ceramic Ultra Thin Wall Substrates for Future Legislation” SAE 2002-01-0349
- Kikuchi Shinichi Hatcho Seiji Okayama Tatsuya Inose Shyoji Ikeshima Kouichi “High Cell Density and Thin Wall Substrate for Higher Conversion Ratio Catalyst” SAE 1999-01-0268
- Schmidt J. Waltner A. Loose G. Hirschmann A. Wirth A. Mueller W. van den Tillaart J. A. A. Mussmann L. Lindner D. Gieshoff J. Umehara K. Makino M. Biehn K. P. Kunz A. “The Impact of High Cell Density Ceramic Substrates and Washcoat Properties on the Catalytic Activity of Three Way Catalysts” SAE 1999-01-0272
- Domesle R. Lindner D. Mueller W. Mussmann L. Votsmeier M. Lox E. S. Kreuzer T. Makino M. Vogt C. D. “Application of Advanced Three-Way Catalyst Technologies on High Cell Density Ultra Thin-Wall Ceramic Substrates for Future Emission Legislations” SAE 2001-01-0924
- Goralski, C. T. Jr. Chanko T. B. “Modeling the Effect of Substrate Cell Shape on Conversion in Monolith Catalysts” SAE 2001-01-0932
- Leonhard Thomas Floerchinger Peter Degen Alf Held Wolfgang Hinze Soeren Pott Ekkehard “Effect of Cell Geometry on Emissions Performance of Ceramic Catalyst Converters” SAE 2002-01-0354
- Aoki Yoichi Miyairi Yukio Ichikawa Yukihito Abe Fumio “Product Design and Development of Ultra Thin Wall Ceramic Catalytic Substrate” SAE 2002-01-0350
- Ikeda Yasuo Sobue Kazuaki Tsuji Sinji Matsumoto Shinichi “Development of NOx Storage-Reducton Three-Way Catalyst for D-4 Engines” SAE 1999-01-1279
- Becker E. Robert Watson Richard Brayer Mickey Vogt Claus Makino Mikio “Prediction of Catalytic Performance During Light-Off Phase with Different Wall Thickness, Cell Density and Cell Shape” SAE 2001-01-0930
- Blanchet Scott Richmond Russell Vaneman Gerald “Implementation of the Effectiveness-Ntu Methodology for Catalytic Converter Design” SAE 980673