This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Advanced Washcoat Technology for PZEV Application
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2008 by SAE International in United States
Annotation ability available
In recent years, automobile emission limits have been tightened world wide. PZEV (Partial Zero Emission Vehicle) which is the most stringent regulation has been imposed in California. To meet the strict PZEV regulation, automotive manufacturers are requesting the catalyst system to have quick light-off characteristics and excellent steady state performance with limited precious group metals (PGM) usage due to the strong price pressure. Moreover, the catalyst can not use high cell density substrate for increasing geometric surface area and reducing heat mass, since the backpressure of exhaust system must be decreased to improve the vehicle power for the PZEV application. This paper will present an efficient catalyst formulation that has been designed to maximize the performance with considerably reduce PGM loading. The catalyst washcoat has been optimized by improving the catalyst geometric surface area, gas diffusivity and thermal mass. The catalyst material was also optimized by enhancing thermal stability and oxygen storage capacity (OSC). The developed catalyst system exhibited superior performance to the previous catalyst developed for the 2006 model year vehicle. The final catalyst system represents a PGM usage that is 50% lower than that of the previous generation.
|Technical Paper||Development and Application of New Low Rhodium Three-Way Catalyst Technology|
|Technical Paper||Development of a New Oxygen Storage Model for SIMTWC|
|Technical Paper||The Volvo S40/V50 PZEV MY2007 with an Optimized 2.4l Engine|
- Yoshiaki Matsuzono - Honda R&D Co. Ltd
- Takashi Iwamoto - Honda R&D Co. Ltd
- Takeshi Narishige - Honda R&D Co. Ltd
- Tomotaka Hirota - Johnson Matthey Japan Inc.
- Takashi Yamada - Johnson Matthey Japan Inc.
- Kenji Tanikawa - Johnson Matthey Japan Inc.
- Mitsuru Komori - Johnson Matthey Japan Inc.
- Geng Zhang - Johnson Matthey Japan Inc.
- Hideaki Muraki - Johnson Matthey Japan Inc.
CitationMatsuzono, Y., Iwamoto, T., Narishige, T., Hirota, T. et al., "Advanced Washcoat Technology for PZEV Application," SAE Technical Paper 2008-01-0812, 2008, https://doi.org/10.4271/2008-01-0812.
- Kitagawa H., Mibe T.,T., Okamatsu K. and Yasui Y., “L4-Engine Development for Super Ultra Low Emission Vehicle”, SAE Paper 2000-01-0887
- Kidokoro R., Hoshi K., Hiraku K., Satoya K., Watanabe T., Fujiwara T. and Suzuki H., “Development of PZEV Ehaust Control System”, SAE Paper 2003-01-0817
- Nishizawa K., Mitsuishi S., Mori K. and Yamamoto S., “Development of Second Generation of Gasoline P-ZEV Technology”, SAE Paper 2001-01-1310
- Ueno M., Akasaki S., Yasui Y. and Iwaki Y., JSAE 9933060.
- Matsuzono Y., Sakanushi M. and Kitagawa H., “Development of low precious-metal automotive perovskite catalytic system”, SAE Paper 2003-01-0814.
- Watanabe K., Taga W., Hirota T., Tanikawa K., Nagashima K., Zhang G. and Muraki H., “Advanced Emission Control System for ULEV2 Application”, SAE Paper 2006-01-0848.
- Hughes K. W. and Witte W., “Ultra Thin Wall Substrates- Trends for Performance in FTP and US06 Tests”, SAE Paper 2002-01-0356.
- Ozawa M., Kimura M. and Isogai M., J. Alloys and Comp., 193 (1993) 73.
- Kojima S., “Development of High Performance and Low Emission 2.4L Gasoline Engine for 2008Model Year Honda Accord”, to be published in SAE 2008 World Congress
- Rokosz M. J., Chenb A. E., Lowe-Mac C. K., Kuncherov A. V., Benson D., Paputa Peck M. C. and McCabee R. W., Appl. Catal. B, 33 (2001) 205.