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Airless In-Line Adsorber System for Reducing Cold Start HC Emissions
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Abstract
A completely passive cold-start emissions control system, without any secondary air source, was developed to reduce cold start hydrocarbon (HC) emissions. The Air-Less Adsorber (ALA) system has a first catalyst, an adsorber, and a second catalyst. The system is designed to adsorb a large fraction of hydrocarbons (HC) during cold start, followed by optimized heating of the second catalyst before adsorber HC desorption. During the HC desorption cycle, the engine is running in closed-loop control near stochiometric air/fuel ratio. There is enough oxygen to oxidize the desorbed HC over the second catalyst.
The ALA system was evaluated using the FTP test on a 3.8 liter V6 vehicle. The ALA system reduced up to 38% of cold start HC emissions beyond the catalyst-only baseline. The system is truly passive.
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Citation
Patil, M., Peng, Y., and Morse, K., "Airless In-Line Adsorber System for Reducing Cold Start HC Emissions," SAE Technical Paper 980419, 1998, https://doi.org/10.4271/980419.Also In
References
- Socha L. S. Thompson D.F. “Electrically heated Extruded Metal Converters for Low Emissions Vehicles,” SAE 920093 1992
- Hurley R.G. “Experiences with Electrically Heated Catalyst,” SAE 912384 1991
- Laing P. M. “Development of an Alternator-Powered Electrically heated Catalyst System,” SAE 940465 1994
- Heimrich M. J. et al. “Electrically Heated Catalyst System Conversions of Two Current Technology Vehicles,” SAE 910612 1991
- Summers J. C. et al. “Use of Light-off Catalysts to Meet the California LEV/ULEV Standards,” SAE 930386 1993
- Oser P. “Novel Emission Technologies with Emphasis on Cold Start Improvements Status Report on VW-Pierburg Burner/Catalyst Systems,” SAE 940474 1994
- Ma T. et al. “Exhaust Gas Ignition - A New Concept for Rapid Light-off of Automotive Exhaust Catalyst,” SAE 920400 1992
- Patil M. D. Lachman I. M. Socha L. S. “Dual Converter Engine Exhaust System for Reducing HC Emissions,”
- Engler B. H. et al. “Reduction of Exhaust Gas Emissions by HC Adsorber Systems,” SAE 930738 1993
- Burke P. L. et al. “Cold Start HC Emissions Control,” SAE 950410 1995
- Kollman K. Abthoff J. Zahn W. “Concepts for Ultra Low Emissions Vehicles,” SAE 940469 1994
- Williams J. L. Patil M. D. Hertl W. “By-pass HC Adsorber System for ULEV,” SAE 960343 1996
- Hertl W. Patil M. D. Williams J. L. “HC Adsorber System for Cold Start Emissions,” SAE 960347 1996
- Patil M. D. Hertl W. Williams J. L. Nagel J. N. “In-line HC Adsorber System for ULEV,” SAE 960348 1996
- Buhrmaster C. L. Locker R. J. Patil M. D. Nagel J. N. Socha L. S. “Evaluation of In-line Adsorber Technology,” SAE 970267 1997
- Noda N. Takahashi A. Mizuno H. “In-line HC (HC) Adsorber System For Cold Start Emissions,” SAE 960266 1997