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In-Cylinder Measurements and Analysis on Fundamental Cold Start and Warm-up Phenomena of SI Engines
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English
Abstract
A recently developed Laser Raman Scattering system was applied to measure the in-cylinder air-fuel ratio and the residual gas content (via the water content) of the charge simultaneously in a firing spark-ignition engine during cold start and warm-up. It is the main objective of this work to elucidate the origin of misfires and the necessity to over-fuel at cool ambient temperatures. It turns out that the overall air-fuel ratio and residual gas content (in particular the residual water content) of the charge appear to be the most important parameters for the occurrence of misfires (without appropriate fuel enrichment), i.e., the engine behaviour from cycle to cycle becomes rather predictable on the basis of these data. An alternative explanation for the necessity to over-fuel is given.
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Citation
Grüefeld, G., Knapp, M., Beushausen, V., Andresen, P. et al., "In-Cylinder Measurements and Analysis on Fundamental Cold Start and Warm-up Phenomena of SI Engines," SAE Technical Paper 952394, 1995, https://doi.org/10.4271/952394.Also In
References
- Sterlepper, J. Neußer, H.-J. Ruhland, H. “HC-Emissions of SI Engines - Optical Investigation of Flame Propagations in Piston Top Land Crevice” SAE Paper 941994 1994
- Heywood, J.B. Internal Combustion Engine Fundamentals McGraw-Hill 1988
- Cheng, W.K. Hamrin, D. Heywood, J. B. Hochgreb, S. Min, K.-D. Norris, M. “An Overview of Hydrocarbon Emissions Mechanisms in Spark-Ignition Engines” SAE Paper 932078 1993
- Guillemot, P. Gattelier, B. Rouveirolles, P. “The Influence of Coolant Temperature on Unburned Hydrocarbon Emissions from Spark Ignition Engine” SAE Paper 941962 1994
- Shin. Y. Cheng, W.K. Heywood, J. B. “Liquid Gasoline Behaviour in the Engine Cylinder of a SI Engine” SAE Paper 941872 1994
- Shayler, P.J. Ma, T. “Cold Start Performance of SI Engines” Paper 481/6 I.Mech.E Pub. “Experimental Methods in Engine Research” 1988
- Shayler, P.J. Ma, T. “The variation of in-cylinder mixture ratios during engine cranking at low ambient temperatures” Paper D00891 I.Mech.E 1992
- Morishima, R. Asai, K. “Mixture Strength at Cranking Cycles of Gasoline Engine Starting” SAE Paper 920235 1992
- Li, C.F. Duan, Q.C. Maroteaux, F. Murat, M. “Time-Resolved Measurement of Fuel Transient Behaviour and Cycle To Cycle Varation of Local Fuel/Air Equivalence Ratio in Gasoline Engines” SAE Paper 940989 1994
- Grünefeld, G. Beushausen, V. Andresen, P. Hentschel, W. “A Major Origin of Cyclic Energy Conversion Variations in SI Engines: Cycle-by-cycle Variations in the Equivalence Ratio and Residual Gas of the Initial Charge” SAE Paper 941880 1994
- Grünefeld, G. Beushausen, V. Andresen, P. Hentschel, W. “Spatially Resolved Raman Scattering for Multi-Species and Temperature Analysis in Technically Applied Combustion Systems: Spray Flame and Four-Cylinder In-Line Engine” Appl. Phys. B 58 333 342 1994
- Maly, R. Vogel, M. “Ignition and Propagation of Flame Fronts in Lean CH4-Air Mixtures by the Three Modes of Ignition Spark” Proc. of Seventeenth International Symposium on Combustion 821 831 The Combustion Institute 1976
- Maly, R. “Spark Igniton: Its Physics and Effects on the Internal Combustion Process” Fuel Economy in Road Vehicles Powered by Spark Ignition Engines Hilliard J. C. Springer G. S. Plenum Press 1984
- Schwarz, H. “Ignition Systems for Lean Burn Engines” Paper C95/79, Proc. of Conference on Fuel Economy and Emissions of Lean Burn Engines 87 96 I.Mech.E London 1979
- Glassman, I. Combustion Acad. Press 1987
- Schurov, S.M. Collings, N. “A Numerical Simulation of Intake Port Phenomena in a Spark Ignition Engine Under Cold Starting Conditions” SAE Paper 941874 1994
- Cheng, C.O. Cheng, W.K. Heywood, J.B. Maroteaux, D. Collings, N. “Intake Port Phenomena in a Spark-Ignition Engine at Part Load” SAE Paper 912401 1991
- International patent application PCT/DE 94/00696