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Transient Characteristics of Cold Start Emissions from a Two-Stage Direct Injection Gasoline Engines Employing the Total Stoichiometric Ratio and Local Rich Mixture Start-up Strategy
Technical Paper
2012-01-1068
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
To improve the cold start performance and to reduce the misfire occurrence at cold start, the start-up strategy of total stoichiometric ratio combined with local rich mixture was applied in the study. The effect of injection strategy (the 1st injection timing, 2nd injection timing, 1st and 2nd fuel injection proportion and ignition timing) on the cold start HC emissions in the initial 10 cycles were investigated in a Two stage direct injection (TSDI) gasoline engine. The transient HC and NO emissions in the initial 10 cycles were analyzed, when the fuels are injected in the only 1st cycle and in the followed all cycles. The transient misfiring HC emissions were compared between the single and two-stage injection modes. In addition, the unburned HC (UBHC) emissions in the 1st cycle are compared among the TSDI engine, Gasoline direct injection (GDI) engine, Port fuel injection (PFI) engine and Liquefied petroleum gaseous (LPG) engine at the stoichiometric ratio. Finally, the characteristics of the transient speed were presented in various boundary conditions. The results show that the retard in the 2nd injection timing and the increase in the 2nd fuel injection amount are favorable to improving the firing performance. And it is favorable for the TSDI engine to improve the cold start performance by means of the total stoichiometric ratio combined with local rich mixture start-up strategy.
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Fan, Q. and Li, L., "Transient Characteristics of Cold Start Emissions from a Two-Stage Direct Injection Gasoline Engines Employing the Total Stoichiometric Ratio and Local Rich Mixture Start-up Strategy," SAE Technical Paper 2012-01-1068, 2012, https://doi.org/10.4271/2012-01-1068.Also In
References
- Eng, J. “The Effect of Spark Retard on Engine-out Hydrocarbon Emissions,” SAE Technical Paper 2005-01-3867 2005 10.4271/2005-01-3867
- Gulati, S. “Thin Wall Ceramic Catalyst Supports,” SAE Technical Paper 1999-01-0269 1999 10.4271/1999-01-0269
- Heywood, J.B. Internal combustion engine fundamental 1 st New York 1988
- Cheng, W. Hamrin, D. Heywood, J. Hochgreb, S. et al. “An Overview of Hydrocarbon Emissions Mechanisms in Spark-Ignition Engines,” SAE Technical Paper 932708 1993 10.4271/932708
- Santoso, H. Cheng, W. “Mixture Preparation and Hydrocarbon Emissions Behaviors in the First Cycle of SI Engine Cranking,” SAE Technical Paper 2002-01-2805 2002 10.4271/2002-01-2805
- Henein, N. Tagomori, M. Yassine, M. Asmus, T. et al. “Cycle-by-Cycle Analysis of HC Emissions During Cold Start of Gasoline Engines,” SAE Technical Paper 952402 1995 10.4271/952402
- Henein, N.A. Tagomori, M.K. Cold-start hydrocarbon emissions in port-injected gasoline engines Progress in Energy and Combustion Science 1999 25 6 563 593
- Takeda, K. Yaegashi, T. Sekiquchi, K. Saito, K. et al. “Mixture Preparation and HC Emissions of a 4-Valve Engine with Port Fuel Injection During Cold Starting and Warm-up,” SAE Technical Paper 950074 1995 10.4271/950074
- Li, J. Gong, C. Su, Y. Dou, H. Liu, X. Performance and hydrocarbon (HC) emissions from a spark-ignition liquefied petroleum gas (LPG) engine during cold start Energy &Fuel 2009 23 7 4337 4342
- Li, J Gong, C Li, B Su, Y Dou, H Liu, X. Combustion and hydrocarbon (HC) emissions from a spark-ignition engine fueled with gasoline and methanol during cold start Energy &Fuel 2009 23 9 4937 4942
- Chen, R.H. Chiang, L.B. Chen, C.N. Lin, T.H. Cold-start emissions of an SI engine using ethanol-gasoline blended fuel Applied Thermal Engineering 2011 31 8-9 1463 1467
- Szekely, G. Alkidas, A. “Combustion Characteristics of a Spray-Guided Direct-Injection Stratified-Charge Engine with a High-Squish Piston,” SAE Technical Paper 2005-01-1937 2005 10.4271/2005-01-1937
- Peckham, M. Finch, A. Campbell, B. “Analysis of Transient HC, CO, NOx and CO2 Emissions from a GDI Engine using Fast Response Gas Analyzers,” SAE Int. J. Engines 4 1 1513 1522 2011 10.4271/2011-01-1227
- Li, Y. Liu, D. Study on the HC Emissions during Cold-Start Conditions of Gasoline Direct Injection Engine Intelligent Computation Technology and Automation (ICICTA) 2011 1210 1213
- Norbert, V.H. Anna-Maria, F. Christian, J.S. Patrick, W. Methane, benzene and alkyl benzene cold start emission data of gasoline-driven passenger cars representing the vehicle technology of the last two decades Atmospheric Environment 2003 37 37 5185 5195
- Lang, K. Cheng, W. “Effects of Fuel Injection Strategy on HC Emissions in a Port-Fuel-Injection Engine During Fast Idle,” SAE Technical Paper 2006-01-3400 2006 10.4271/2006-01-3400
- Fischer, H. Brereton, G. “Fuel Injection Strategies to Minimize Cold-Start HC Emission,” SAE Technical Paper 970040 1997 10.4271/970040
- Kaiser, E. Siegl, W. Baidas, L. Lawson, G. et al. “Time-Resolved Measurement of Speciated Hydrocarbon Emissions During Cold Start of a Spark-Ignited Engine,” SAE Technical Paper 940963 1994 10.4271/940963
- Liao, S.Y. Jiang, D.M. Cheng, Q. Huang, Z.H. Wei, Q. Investigation of the cold start combustion characteristics of ethanol gasoline blends in a constant volume chamber Energy&Fuels 2005 19 3 813 819
- Fox, J. Min, K. Cheng, W. Heywood, J. “Mixture Preparation in a SI Engine with Port Fuel Injection During Starting and Warm-Up,” SAE Technical Paper 922170 1992 10.4271/922170
- Bielaczyc, P. Merkisz, J. “Cold Start Emissions Investigation at Different Ambient Temperature Conditions,” SAE Technical Paper 980401 1998 10.4271/980401
- Yu, S. The study of characteristics of transient emissions during cold start for LPG SI engine based on cycle-by-cycle control Shanghai Jiao tong University Doctoral Dissertation Academic Press Shanghai 2009
- Li, G. The study of characteristics of transient combustion and emissions during gasoline engine start for HEV application, Shanghai Jiao tong University Doctoral Dissertation Academic Press Shanghai 2007