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Contribution of Oil Layer Mechanism to the Hydrocarbon Emissions from Spark-Ignition Engines
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Abstract
A research program designed to measure the contribution from fuel absorption in the thin layer of oil, lubricating the cylinder liner, to the total and speciated HC emissions from a spark ignition engine has been performed. The logic of the experiment design was to test the oil layer mechanism via variations in the oil layer thickness (through the lubricant formulations), solubility of the fuel components in the lubricants, and variations in the crankcase gas phase HC concentration (through crankcase purging). A set of preliminary experiments were carried out to determine the solubility and diffusivity of the fuel components in the individual lubricants.
Engine tests showed similar HC emissions among the tested lubricants. No consistent increase was observed with oil viscosity (oil film thickness), contrary to what would be expected if fuel-oil absorption was contributing significantly to engine-out HC. Similarly, no effect of crankcase purging could be observed.
A one dimensional absorption/desorption model was used to interpret the HC emissions data for the different lubricants. Neither the total HC emissions, nor the fuel species emissions, nor the results from the crankcase purging tests support the hypothesis that the oil layer is a significant HC mechanism.
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Linna, J., Målberg, H., Bennett, P., Palmer, P. et al., "Contribution of Oil Layer Mechanism to the Hydrocarbon Emissions from Spark-Ignition Engines," SAE Technical Paper 972892, 1997, https://doi.org/10.4271/972892.Also In
References
- Dent J. C. Lakshminarayanan P. A. 1983 A model for absorption and desorption of fuel vapour by cylinder lubricating oil films and its contribution to hydrocarbon emissions SAE Technical Paper No. 830652
- Carrier G. Fendell F. Feldman P. 1981 Cyclic absorption/desorption of gas in a liquid wall film Combustion Science and Technology 25 9 19
- Korematsu K. 1990 Effects of fuel absorbed in oil film on unburnt hydrocarbon emissions from spark ignition engines (numerical model of dynamic process of fuel absorption and desorption) JSME International Journal Series II 33 3
- Shih L. K. Assanis D 1992 Modeling unburned hydrocarbon formation due to absorption/desorption processes into the wall oil film Symposium on Mechanism and Chemistry of Pollutant Formation and Control from Internal Combustion Engines Division of Petroleum Chemistry, Inc. American Chemical Society Washington, D.C. August 23 28 1992 1479 1497
- Kaiser E. W. Adamczyk A. A. Lavoie G. A. 1981 The effect of oil layers on the hydrocarbon emissions generated during closed vessel combustion Eighteenth Symposium (International) on Combustion The Combustion Institute 1881 1890
- Adamczyk A. A. Kach R. A. 1984 The effect of oil layers on hydrocarbon emissions: low solubility oils Combustion Science and Technology 36 227
- Adamczyk A. A. Kach R. A. 1985 A combustion bomb study of fuel-oil solubility and HC emissions from oil layers Twentieth Symposium (International) on Combustion The Combustion Institute 37 43
- Koremtasu K. Takemura S. Gabe M. 1986 Effects of fuel absorbed in oil film on unburned hydrocarbon emissions from spark ignition engines (experiments by combustion bomb) Trans. Jpn. Soc. Mech. Eng. (in Japanese) 52 482
- Ishizawa S. Takagi Y 1987 A study of HC emission from a spark ignition engine (The influence of fuel absorbed into cylinder lubricating oil film) JSME International Journal 30 260 310 31
- Gatellier B. Trapy J. Herrier D. Hydrocarbon emissions of SI engines as influenced by fuel absorption-desorption in oil films SAE Technical Paper No. 920095
- Ma T. H. Woods W. A. Panesar A. Brown P. Dent J. C. Lambert N. 1987 Tracing the sources of hydrocarbon emissions in engines - a review of several research programmes made over the past five years ImechEC326/87
- Schramm J. Sorenson S 1989 Effects of lubricating oil on hydrocarbon emissions in an SI engine SAE Technical Paper No. 890622
- Wentworth J. T. 1972 More on origin of exhaust hydrocarbons - effects of zero oil consumption, deposit location, and surface roughness SAE Technical Paper No. 720939
- Russ S Kaiser E Siegl W Podsiadlik D Barrett K 1995 Compression Ratio and Coolant Temperature Effects on HC Emissions from a S.I. Engine SAE Technical Paper No 950163
- Kaiser E. W. Siegl W. O. Russ S. G. 1995 Fuel Composition Effects on Hydrocarbon Emissions from a Spark-Ignited Engine - Is Fuel Absorption in Oil Significant ? SAE Technical Paper No. 952542
- Linna J-R Hochgreb S. 1995 Analytical Scaling Model for Hydrocarbon Emissions from Fuel Absorption in Oil Layers in Spark Ignition Engines Combustion Science and Technology 1995 109 205 226
- Bennett P. J. Copp D. E. Linna J-R Malberg H. 1997 The Effect of Lubricant Composition on Vehicle Exhaust Emissions SAE Technical Paper No. 97FL-403
- Gibbs L. M. 1996 Gasoline specifications, regulations, and properties Automotive Engineering October 1996 35 42
- Chen K. C. DeWitte K. Cheng W. K. 1994 A Species-Based Multi-Component Volatility Model for Gasoline SAE Technical Paper No. 941877
- Boyle R. J. Boam D. J. Finlay I. C. 1993 Cold Start Performance of an Automotive Engine Using Prevaporized Gasoline SAE Technical Paper No . 930710
- Tian T. Wong V. Heywood J. B. 1996 A Piston Ring-Pack Film Thickness and Friction Model for Multigrade Oils and Rough Surfaces SAE Technical Paper No. 962032
- Poulos S. G. Heywood J. B. 1983 The effect of chamber geometry on spark-ignition engine combustion SAE Technical Paper No. 830334
- Poulos S. G. 1982 The effect of combustion chamber geometry on S.I. engine combustion rates - a modeling study S.M. Thesis 1982
- Woschni G. 1967 A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine SAE Technical paper No 670931
- Murakami Y. Aihara H. 1991 Analysis of Mechanism Intermixing Combustion Products in Engine Oil (Quantity and Composition of Unburned Gasoline in Engine Oil and Crankcase Gas) JSME International Journal Series II 34 4 548 556
- Cheng W. K. Hamrin D. Heywood J. B. Hochgreb S. Min K. Norris M 1993 An Overview of Hydrocarbon Emissions Mechanisms in Spark-Ignition Engines SAE Technical Paper No 932708
- Kaiser E. W. Siegl W. 0. Cotton D. F. Anderson R. F. 1995 Effect of Fuel Structure on Emissions from a Spark-Ignited Engine. 2. Naphtene and Aromatic Fuels Environ Sci. Technol. 26 1581
- Sorab J. Holdeman H. A. Chul G. K. 1993 Viscosity Prediction for Multigrade Oils SAE Technical Paper No. 932833
- Taylor R. I. Brown M. A. Thompson D. M. Bell J. C. 1994 The influence of Lubricant Rheology on Friction in the Piston Ring-Pack SAE Technical Paper No. 941981
- Wright B. van Os N. M. Lyons J. A. 1983 European Activity Concerning Engine Oil Viscosity Classification - Part IV - The Effects of Shear Rate and Temperature on the Viscosity of Multigrade Oils SAE Technical Paper No. 830027
- Taylor R. I. Brown M. A. Thompson D. M. Bell J. C. 1994 The influence of Lubricant Rheology on Friction in the Piston Ring-Pack SAE Technical Paper No. 941981