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An Alternative Method for Fast Light-Off of Catalysts - Cranking Exhaust Gas Ignition
Technical Paper
2002-01-1678
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Recent stringent emission regulations need fast light-off of catalysts to reduce HC and CO emissions during cold start. Cranking Exhaust Gas Ignition (CEGI) system, developed in this study, cuts off the ignition signals for 10 seconds during the cranking period for the unburned mixture to bypass the combustion chamber and flow through the exhaust manifold. When the unburned mixture reaches two glowplugs mounted upstream of the catalyst, it is ignited and releases thermal energy to warmup the catalyst. Results from the vehicle tests showed that the catalyst reaches the light-off temperature within 20 seconds and the reduction of exhaust emission was 47.7% for THC and 88.6% for CO in the cold-transient phase of the FTP-75 mode.
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Cho, Y., Lee, Y., Kim, D., Jung, S. et al., "An Alternative Method for Fast Light-Off of Catalysts - Cranking Exhaust Gas Ignition," SAE Technical Paper 2002-01-1678, 2002, https://doi.org/10.4271/2002-01-1678.Also In
References
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- Cho Y. S. et al. “Flow Distribution in a Close-Coupled Catalytic Converter” SAE Paper No. 982552 1998
- Ma T. Collins N. Hands T. “Exhaust Gas Ignition (EGI) - A new Concept for Rapid Light-Off of Automotive Exhaust Gas Catalyst” SAE Paper No. 940400 1992
- Eade D. et. al. “Fast Light-Off of Underbody Catalysts Using Exhaust Gas Ignition” SAE Paper No. 952417 1995
- Brett S. C. Eade D. et. al. “Evaluation of Catalyzed Hydrocarbon Traps in the EGI System: Potential for Hydrocarbon Emissions Reduction” SAE Paper No. 981417 1998
- Cho Y. S. Lee Y. S. Kim C. S. Jung S. Y. “Fast Light-off of Catalysts using Cranking Exhaust Gas Ignition” Proceedings of KSAE Fall Meeting I 336 341 1998