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Investigation of the Influence of Top Land Crevice Geometry on Hydrocarbon Emissions from SI Engines
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English
Abstract
The reduction of emissions of future SI engines is of prime importance for their development. Hence, investigations of the formation of unburned hydrocarbons in SI engines have been the subject of intensive research for many years.
The scope of this work was to investigate several pistons with different top land geometry with respect to the potential of HC reduction. The observation of flame intrusion into the top land crevice was enabled by an optical fiber measurement technique. For this, six optical probes were inserted into the cylinder liner of a production four-cylinder SI engine. The emissions were detected with a conventional exhaust gas measuring system.
The results of the investigation show reductions of about 30% in the HC emission. The flame intrusion depth and the frequency of intrusion are clearly dependent on the top land geometry.
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Citation
Bignion, E. and Spicher, U., "Investigation of the Influence of Top Land Crevice Geometry on Hydrocarbon Emissions from SI Engines," SAE Technical Paper 982560, 1998, https://doi.org/10.4271/982560.Also In
References
- Cheng W.K. Hamrin D. Heywood J.B. Hochgreb S. Min K. Norris M. “An Overview of Hydrocarbon Emissions Mechanisms in Spark-Ignition Engines” SAE PAPER, 932708 1993
- Daniel W.A. “Why Engine Variables Affect Exhaust Hydrocarbon Emission” SAE PAPER, 700108 1970
- Heywood J.B. John B. “Internal Combustion Engine Fundamentals” McGraw-Hill Book Company New York 1988
- Namazin M. Heywood J.B. “Flow in the Piston-Cylinder-Ring Crevices of a Spark-Ignition Engine: Effect on HC Emissions, Efficiency and Power” SAE-Paper 820088
- Panesar A. Brown P.G. Woods W.A. “The results of recent experiment on unburned hydrocarbons” 1988
- Saika T. Korematsu K. “Flame Propagation into the Ring Crevice of a Spark Ignition Engine” SAE-Paper 861528
- Schramm J. Sorenson S.C. “A Model for Hydrocarbon Emissions from SI Engine” SAE PAPER, 902169 1990
- Sterlepper J. Spicher U. “Flame Propagation into Top Land Crevice and Hydrocarbon Emissions from an S.I. Engine - A Study by Optical Fiber Diagnostics” 4th International Conference on Vehicle and Traffic Systems Technology Strasbourg, France 16-18 June 1993
- Wentworth J.T. “The Piston Crevice Volume Effect on Exhaust Hydrocarbon Emissions” Combustion, Science and Technology 4 1971
- Spicher U. Kollmeier H.-P. “Detection of Flame Propagation during Knocking Combustion by Optical Fiber Diagnostics” SAE PAPER, 861532 1986
- Spicher U. Schmitz G. Kollmeier H.-P. “Application of a New Optical Fiber Technique for Flame Propagation Diagnostics in IC Engine” SAE PAPER, 881637 1988
- Spicher U. Krebs R. “Optical Fiber Technique as a Tool to Improve Combustion Efficiency” SAE PAPER, 902138 1990
- Spicher U. Velji A. “Measurements of Spatial Flame Propagation and Flow Velocities in a Spark Ignition Engine” 20th Symposium on Combustion The Combustion Institute Ann Arbor 1984