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Control of Cold Start Emissions through Modulation of Engine Exhaust Gases
Technical Paper
2006-01-0627
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents a computational investigation of the effect of engine exhaust gas modulations on the performance of an automotive catalytic converter during cold starts. The objective is to assess if the modulations can result in faster catalyst light-off conditions and thus reduce cold-start emissions. The study employs a single-channel based, one-dimensional, non-adiabatic model. The modulations are generated by forcing the variations in exhaust gases air-fuel ratio and gas compositions. The results show that the imposed modulations cause a significant departure in the catalyst behavior from its steady behavior, and modulations have both favorable and harmful effects on pollutant conversion during the cold-starts. The operating conditions and the modulating gas composition have substantial influence on catalyst behavior.
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Citation
Shamim, T., "Control of Cold Start Emissions through Modulation of Engine Exhaust Gases," SAE Technical Paper 2006-01-0627, 2006, https://doi.org/10.4271/2006-01-0627.Also In
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