This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of Extruded Electrically Heated Catalyst System for ULEV Standards
Annotation ability available
Sector:
Language:
English
Abstract
Into the early-part of the next century, automotive emission standards are becoming stricter around the world. The electrically-heated catalyst (EHC) is well known as an effective technology for the reduction of cold-start hydrocarbon emissions without a significant increase in back pressure. Our extruded, alternator powered EHC (APEHC) manufactured with a unique canning method and equipped with a reliable, water proof electrode has demonstrated excellent durability and reliability, as stated in our previous SAE paper (#960340).
The APEHC system discussed in this paper has achieved the Ultra-Low-Emission Vehicle (ULEV) standards, after 100,000 miles of fleet testing, without any failure. This is the final milestone in addressing the EHC as a realistic-production technology for ULEV.
With the ability to meet ULEV/Stage III emission targets without a significant increase in back pressure, the EHC will be applied to an especially high performance vehicle with a large displacement engine. For the operating characteristics of this application, higher durability and emission performance of the EHC is required. A newly-designed EHC with a smaller element diameter eliminated substrate deformation and increased the natural frequency.
The EHC system with an extruded-APEHC has become a viable technology for MY99 production to meet ULEV/Stage III standards.
Recommended Content
Authors
Topic
Citation
Shimasaki, Y., Kato, H., Abe, F., Hashimoto, S. et al., "Development of Extruded Electrically Heated Catalyst System for ULEV Standards," SAE Technical Paper 971031, 1997, https://doi.org/10.4271/971031.Also In
References
- Whittenberger, W. A. Kubsh, J. E. “Recent Developments in Electrically Heated Metal Monoliths” SAE 900503 1990
- Heimrich, M. J. Albu, S. Osborn, J. “Electrically-Heated Catalyst System Conversions on Two Current-Technology Vehicles” SAE 910612 1991
- Hurley, R. G. et al “Experiences with Electrically Heated Catalysts” SAE 912384 1991
- Kubsh, J. E. Lissiuk, P. W. “Vehicle Emissions Performance with an Electrically Heated Converter System” SAE 912385 1991
- Socha, L. S. Thompson, D. F. “Electrically Heated Extruded Metal Converters for Low Emission Vehicles” SAE 920093 1992
- Hellman, K. H. Piotrowski, G. K. Schaefer, R. M. “Start Catalyst Systems Employing Heated Catalyst Technology for Control of Emissions from Methanol-Fueled Vehicles” SAE 930382 1993
- Kaiser, F. W. et at “Optimization of an Electrically-Heated Catalytic Converter System Calculations and Application” SAE 930384 1993
- Hadded, O. et al “The Achievement of ULEV Emission Standards for Large High Performance Vehicles” SAE 930389 1993
- Brunson, B. Kubsh, J. E. Whittenberger, W. A. “Combining Heated and Unheated Core Functions for Improved Cold Start Emissions Performance” SAE 932722 1993
- Küper, P. F. et a] “Ultra Low Power Electrically Heated Catalyst system” SAE 940465 1994
- Kollmann, K. Asthoff, J. Zahn, W. “Concepts for Ultra Low Emission Vehicles” SAE 940469 1994
- Langen, P. et al “Heated Catalytic Converter Competing Technologies to Meet LEV Emission Standards” SAE 940470 1994
- Socha, L. S. et al “Emission Performance of Extruded Electrically Heated Catalysts in Several Vehicle Applications” SAE 950405 1995
- Pfalzgraf, B. et al “The System Development of Electrically Heated catalyst (EHC) for the LEV and EU-III Regulations” SAE 951072 1995
- Kubsh, J. E. Weber, P. A. “EHC Impact on Extended Hot Soak Periods” SAE 952418 1995
- Mizuno, H. et al “A Structurally Durable EHC for the Exhaust Manifold” SAE 940466 1994
- Abe, F. et al “An Extruded Electrically Heated Catalyst: From Design Concept though Proven-Durability” SAE 960340 1996
- Shimasaki, Y. et al “Study on Conformity Technology with ULEV Using EHC System” SAE 960342 1996
- Kil, J. et a] “Optimization of the Package Design for Manifold Catalytic Converter Application” SAE 960561 1996
- Hijikata, T. et al “Thermal Reliability and Performance Improvement of Close-Coupled Catalytic Converter” SAE 960565 1996
- Takada, T. et al “Study of Divided Converter Catalytic System Satisfying Quick Warm up and High Heat Resistance” SAE 960797 1996
- Tamura, N. et al The Development of an Automotive Catalyst using a Thin Wall (4 mil/400cpsi) Substrate” SAE 960557 1996