This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Replacing Fuel Enrichment in a Turbo Charged SI Engine: Lean Burn or Cooled EGR
Technical Paper
1999-01-3505
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The objective of the research presented in this paper, is to examine the potential to suppress knock and to reduce the exhaust gas temperature by using either lean mixtures or mixtures diluted with cooled EGR, at high load conditions, in a turbo charged spark ignited engine. Engine tests were carried out with lean mixtures, rich mixtures and mixtures diluted by cooled EGR at various degrees of dilution and at various inlet temperatures. The effects on the combustion process was evaluated at constant brake mean effective pressure for various levels of dilution at two different engine speeds. Full load performance was compared with the standard fuel enriched case.
Both lean homogeneous operation and cooled EGR are possible replacements of fuel enrichment. Cooled EGR allows the use of a three-way catalytic converter at all operating conditions, resulting in substantially lower tailpipe emissions of CO and HC compared to rich operation. Lean homogeneous operation offers an even more substantial tail pipe reduction of CO and HC, but carries a penalty in NOx compared to cooled EGR.
Recommended Content
| Technical Paper | Knock Suppression in a Turbocharged SI Engine by Using Cooled EGR |
| Technical Paper | Dilution Interest on Turbocharged SI Engine Combustion |
| Technical Paper | EGR Systems Evaluation in Turbocharged Engines |
Authors
Citation
Grandin, B. and Ångström, H., "Replacing Fuel Enrichment in a Turbo Charged SI Engine: Lean Burn or Cooled EGR," SAE Technical Paper 1999-01-3505, 1999, https://doi.org/10.4271/1999-01-3505.Also In
References
- Blunsdon, C. A. Dent, J. C. “The Simulation of Autoignition and Knock in a Spark Ignition Engine with Disk Geometry” SAE paper 940524 1994
- Bradley, D. Kalghatgi, G.T. Morley, C. Snowdon, P. Yeo, J. “CARS temperature measurements and the cyclic dispersion of knock in spark ignition engines” 25:th symposium on combustion The Combustion Institute 1994 125 133
- Brunt, M. Pond, C. Biundo, J. “Gasoline Engine Knock Analysis using Cylinder Pressure Data” SAE paper 980896 1998
- Brüstle, C. Hemmerlein, N. “Exhaust gas turbocharged SI engines and thair ability of meeting future demands”
- Burgdorf, K. Denbratt, I. “Comparison of Cylinder Pressure Based Knock Detection Methods” SAE paper 972932 1997
- Chun, K.M Heywood, J.B “Estimated Heat Release and Mass-of-Mixture Burned from Spark-Ignition engine Pressure Data” Combustion, Sci. and Tech. 1987 54 133 143
- Diana, S. Giglio, V. Iorio, B. Police, G. “A strategy- to improve the efficiency of stoichiometricic spark ignition engines” SAE paper 961953 1996
- Fitton, J. Nates, R. “Knock Erosion in Spark-Ignition Engines” SAE paper 962102 1996
- Gatawski, J.A. Balles, E.N. Chun, K.M. Nelson, F.E. Ekchian, J.A. Heywood, J.B. “Heat Release Analysis of engine Pressure Data” SAE paper 841359 1984
- Grandin, B. Ångström, H-E. Stålhammar, P. Olofsson, E. “Knock Suppression in a Turbocharged SI Engine by Using Cooled EGR” SAE paper 982476 1998
- Harrington, J. A. “Water addition to gasoline - Effect on Combustion, Emissions, Performance and Knock” SAE paper 820314 1982
- Hacohen, J. Ashcroft, S.J. Belmont, M.R. “Lean burn Versus EGR S.I. Engine” SAE paper 961902 1996
- Han, S. Cheng, W. K. “Design and Demonstration of a Spark Ignition Engine Operating in a Stratified-EGR Mode” SAE paper 980122 1998
- Heywood, John B. “Internal combustion engine fundamentals” McGraw - Hill ,inc 1988
- Kuwahara, K. Ueda, K. Ando, H. “Mixing Control Strategy for Engine Performance Improvement in a Gasoline Direct Injection Engine” SAE paper 980158 1998
- König, G. Sheppard, C. G. W. “End Gas Autoignition and Knock in a Spark Ignition Engine” SAE paper 902135 1990
- König, G. Sheppard, C. G. W. Maly, R. R. Bradley, D. Lau, A. K. C. “Role of Exothermic Centres on Knockinitiation and Knock Damage” SAE paper 902136 1990
- Lanzafame, R. “Water Injection Effects in a single- Cylinder CFR Engine” SAE paper 1999-01-0568 1999
- Lumsden, G. Eddleston, D. Sykes, R. “Comparing Lean Burn and EGR” SAE paper 970505 1997
- Maly, R.R. Klein, R. Peters, N. König, G. “Theoretical and Experimental Investigation of Knock Induced Surface Destruction” SAE paper 900025 1990
- Neame, G.R. Gardiner, D.P. Mallory, R.W. Rao, V.K. Bardon, M.F. Battista, V. “Improving the Fuel Economy of Stoichiometrically Fuelled S.I. Engines by Means of EGR and Enhanced Ignition-A Comparison of Gasoline, Methanol and Natural Gas” SAE paper 952376 1995
- Pan, J. Sheppard, C.G.W. “A Theoretical and Experimental Study of the Modes of End Gas Autoignition Leading to Knock in S.I. Engines” SAE paper 942060 1994
- Pan, J. Sheppard, C. Tindall, A. Berzins Pennington, S. Ware, J. “End Gas Inhomogenity, Autoignition and Knock” SAE paper 982616 1998
- Rohdes, D. Keck, J. “Laminar Burning Speed Measurements of Indolene-Air-Diluent Mixtures at High Pressures and Temperatures” SAE paper 850047 1985
- Spicher, U. Kröger, H. Ganser, J. “Detection of Knocking Combustion Using Simultaneously High-Speed Schlieren Cinematography and Multi Optical Fiber Technique” SAE paper 912312 1991
- Tabata, M. Yamamoto, T. Fukube, T. “Improving NOx and Fuel Economy for Mixture Injected SI Engines with EGR” SAE paper 950684 1995