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Fast Catalyst Light-Off with Dynamic Skip Fire
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Catalytic aftertreatment is commonly used to reduce regulated gas emissions from Internal Combustion (IC) engines. Achieving fast catalyst light-off has always been a challenge for automobile IC engine applications. This paper experimentally studied the thermal management and regulated gas emissions from a Spark Ignition (SI) engine with Dynamic Skip Fire (DSF®) technology during cold start period.
The study has found that DSF can increase exhaust gas temperature at the catalyst inlet by up to 100°C, and the exhaust enthalpy by up to 20%. Cold start tailpipe carbon monoxide (CO) and hydrocarbon (HC) emissions can be reduced by 10% to 20% largely due to the increased exhaust gas temperature and enthalpy. Dynamic air pumping can further increase exhaust gas temperature by 30 °C, and can nearly double enthalpy delivered to the catalyst, which reduces cold start HC emissions by more than 50%.
CitationLuo, X., Hashemi, S., Subramanian, R., Arvanitis, A. et al., "Fast Catalyst Light-Off with Dynamic Skip Fire," SAE Technical Paper 2020-01-0313, 2020, https://doi.org/10.4271/2020-01-0313.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
- Ma, T., Collings, N., and Hands, T. , “Exhaust Gas Ignition (EGI) - A New Concept for Rapid Light-Off of Automotive Exhaust Catalyst,” SAE Technical Paper 920400, 1992, https://doi.org/10.4271/920400.
- Köpple, F. et al. , “Experimental Investigation of Fuel Impingement and Spray-Cooling on the Piston of a GDI Engine via Instantaneous Surface Temperature Measurements,” SAE International Journal of Engines 7(3):1178-1194, 2014.
- Eng, J.A. , “The Effect of Spark Retard on Engine-Out Hydrocarbon Emissions,” SAE Technical Paper 2005-01-3867, 2005, https://doi.org/10.4271/2005-01-3867.
- Srinivasan, K., Krishnan, S., and Midkiff, K. , “Improving Low Load Combustion, Stability, and Emissions in Pilot-Ignited Natural Gas Engines,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 220(2):229-239, 2006.
- Pekrul, E. and Hudak, E. , “Engine Exhaust Systems with Secondary Air Injection Systems,” 2013, Google Patents.
- Haynes, B.S. and Wagner, H.G. , “Soot Formation,” Progress in Energy and Combustion Science 7(4):229-273, 1981.
- Whelan, I. et al. , “The Effect of a Three-Way Catalytic Converter on Particulate Matter from a Gasoline Direct-Injection Engine During Cold-Start,” SAE International Journal of Engines 6(2):1035-1045, 2013.
- Eisazadeh-Far, K. and Younkins, M. , “Fuel Economy Gains through Dynamic-Skip-Fire in Spark Ignition Engines,” SAE Technical Paper 2016-01-0672, 2016, https://doi.org/10.4271/2016-01-0672.
- Wilcutts, M. et al. , “Electrified Dynamic Skip Fire (eDSF): Design and Benefits,” SAE Technical Paper 2018-01-0864, 2018, https://doi.org/10.4271/2018-01-0864.
- Dahodwala, M. et al. , “Strategies for Meeting Phase 2 GHG and Ultra-Low NOx Emission Standards for Heavy-Duty Diesel Engines,” SAE Int. J. Engines 11(6):1109-1122, 2018, https://doi.org/10.4271/2018-01-1429.
- Patterson, G.J. and Hayman, A.W. , “Cylinder Deactivation System and NOx Trap Regeneration,” 2004, Google Patents.
- Dahodwala, M. et al. , “Strategies for Meeting Phase 2 GHG and Ultra-Low NOx Emission Standards for Heavy-Duty Diesel Engines,” SAE Int. J. Engines 11(6):1109-1122, 2018.
- Scassa, M. et al. , “Smart Cylinder Deactivation Strategies to Improve Fuel Economy and Pollutant Emissions for Diesel-Powered Applications,” SAE Technical Paper 2019-24-0055, 2019, https://doi.org/10.4271/2019-24-0055.
- Chen, X.D. and Roskilly, M. , “A Crank Angular Velocity Based Method for Engine IMEP Measurement for Idle Quality Investigation and Adaptive Ignition Time Trimming to Improve Idle Quality,” SAE Technical Paper 1999-01-0855, 1999, https://doi.org/10.4271/1999-01-0855.
- Lee, D. and Heywood, J.B. , “Effects of Secondary Air Injection During Cold Start of SI Engines,” SAE Int. J. Engines 3(2):182-196, 2010, https://doi.org/10.4271/2010-01-2124.