This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Investigation into Controlled Auto-Ignition Combustion in a GDI Engine with Single and Split Fuel Injections
Technical Paper
2007-01-0211
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A multi-cycle three-dimensional CFD engine simulation programme has been developed and applied to analyze the Controlled autoignition (CAI) combustion, also known as homogeneous charge compression ignition (HCCI), in a direct injection gasoline engine. CAI operation was achieved through the negative valve overlap method by means of a set of low lift camshafts. The effect of single injection timing on combustion phasing and underlying physical and chemical processes involved was examined through a series of analytical studies using the multi-cycle 3D engine simulation programme. The analyses showed that early injection into the trapped burned gases of a lean-burn mixture during the negative valve overlap period had a large effect on combustion phasing, due to localized heat release and the production of chemically reactive species. As the injection was retarded to the intake stroke, the charge cooling effect tended to slow down the autoignition process. However, further retard of fuel injection to the compression stroke caused the earlier start of main combustion as fuel stratification was produced in the cylinder. In order to optimize the engine performance and engine-out emissions, double injection was investigated by injecting part of the fuel first in the negative valve overlap period and the rest of fuel during the intake or compression strokes. By varying the fueling of each injection, the best engine performance was obtained with the 50/50 fuel injection split ratio, while the lowest total NOx and soot emissions were seen with the optimal split injection ratio of 10/90.
Recommended Content
Authors
Topic
Citation
Cao, L., Zhao, H., and Jiang, X., "Investigation into Controlled Auto-Ignition Combustion in a GDI Engine with Single and Split Fuel Injections," SAE Technical Paper 2007-01-0211, 2007, https://doi.org/10.4271/2007-01-0211.Also In
References
- Onishi, S. Hong Jo S. Shoda, K. Do Jo, P. Kato, S. 1979 “Active thermo-atmosphere combustion ATAC) - A new combustion process for internal combustion engines” SAE paper 790507
- Willand, J. Nieberding, R. Vent, G. et al. 1998 “The knocking syndrome-its cure and its potential” SAE paper 982483
- Marriott, C.D. Reitz, R.D. 2002 “Experimental investigation of direct injection-gasoline for premixed compression ignited combustion phasing control” SAE paper 2002-01-0418
- Urushihara, T. Hiraya, K. et al 2003 “Expansion of HCCI operating region by the combination of direct fuel injection, negative valve overlap and internal fuel reformation” SAE paper 2003-01-0749
- Koopmans, L. Ogink, R. Denbratt, I. 2003 “Direct gasoline injection in the negative valve overlap of a homogeneous charge compression ignition engine” JSAE 20030195
- Standing R. 2005 “Controlled auto-ignition in a multi-cylinder direct injection gasoline engine” Brunel university UK
- Amsden, A.A. 1999 “KIVA-3V, release 2, improvements to KIVA-3V” Los Alamos National Laboratory Report No. LA-UR-99-915
- Han, Z. Reitz, R.D. 1997 “A temperature wall function formulation for variable-density turbulence flows with application to engine convective heat transfer modeling” International Journal of Heat and Mass Transfer 40 3 613 625
- Han Z. Fan L. Reitz, R.D. 1997 “Multidimensional Modeling of Spray Atomization and Air-Fuel Mixing in a Direct-Injection Spark-Ignition Engine” SAE Paper 970884
- Halstead, M. Prothero, A. Quinn, C.P. 1977 “The Autoignition of Hydro-Carbon Fuels at High Temperatures and Pressures-Fitting of a Mathematical Model” Combustion and Flame 30 45 60
- Kong, S. C. Han Z. Reitz, R.D. 1995 “The Development and Application of a Diesel Ignition and Combustion Model for Multidimensional Engine Simulation” SAE Paper 950278
- Li, J. Zhao, H. Ladommatos, N. 2001 “Research and development of controlled auto-ignition combustion in a 4-stroke multi-cylinder gasoline engine” SAE paper 2001-01-3608
- Cao, L. Zhao, H. Jiang, X. Kalian, N. 2005 “Understanding the influence of valve timings on controlled autoignition combustion in a four-stroke port fuel injection engine” IMechE Part D: Journal of Automobile Engineering 219 807 823
- Kuo, T.W. Reitz, R.D. 1992 “Three-Dimensional Computations of Combustion in Premixed-Charge and Direct-Injected Two-Stroke Engines” SAE Paper 920425
- Borman, C.T. 1975 “Kinetics of pollutant formation and destruction in combustion” Prog. Energy Combust. Sci. 1 33 45
- Heywood, J.B. 1988 “Internal combustion engine fundamentals” McGraw-Hill Book Company 0-07-100499-8 574
- Hiroyasu, H. Nishida, K. 1989 “Simplified three-dimensional modelling of mixture formation and combustion in a DI diesel engine” SAE paper 890269
- Nagle, J. Strickland-Constable, R.F. 1962 “Oxidation of carbon between 1000-2000 C” Proc. of the fifth carbon conf. 1 154
- Rutland, C.J. Echhause, J. Hampson, G. et al. 1994 “Toward predictive modelling of diesel engine intake flow, combustion, and emissions” SAE paper 941897
- Aceves, S.M. Flowers, D.L. Westbrook, C.K. et al. 2000 “A multi-zone model for prediction of HCCI combustion and emissions” SAE paper 2000-01-0327