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Measurements of Oil Film Thickness and Liner Temperature at Top Ring Reversal in a Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1990 by SAE International in United States
Annotation ability available
An investigation into factors influencing top-ring oil film thickness at TDC, in a diesel engine, was carried out using capacitance probes and surface thermocouples installed in the liner. Short term and long term trends in the data were observed, and many unexpected features were found. Significant, consistent differences in the film thickness around the cylinder were detected, and the thermocouples showed that for this engine, the top ring unexpectedly cools the wall for a short time near TDC.
Due to irreproducibility of the data, two different data acquisition techniques were used. Acquiring consecutive cycles, for a short period of time, provided a “high resolution snapshot” of the process. This method however, was not sufficient to characterize the data, and it was found that taking non-consecutive cycles, over a longer period of time, provided much more knowledge about the long term trends in the data.
Normal changes in oil and operational parameters, such as viscosity and peak cylinder pressure (respectively), seemed to have little effect on oil film thickness. However, changes in oil and operating parameters of large enough magnitude were detectable. For example, the compression stroke always showed a thinner film than the exhaust stroke, and when the cylinder walls were wetted by fuel, the film thickness dropped dramatically.
The effect of the mechanical condition of the engine was also found to be very significant; an under-sized piston was found to cause much metal-to-metal contact between the ring and liner, whereas a properly fitted piston showed practically none.
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CitationMyers, J., Borman, G., and Myers, P., "Measurements of Oil Film Thickness and Liner Temperature at Top Ring Reversal in a Diesel Engine," SAE Technical Paper 900813, 1990, https://doi.org/10.4271/900813.
SAE Transactions Journal of Fuels and Lubricants
Number: V99-4; Published: 1991-09-01
Number: V99-4; Published: 1991-09-01
- Courtney-Pratt, J.S. Tudor, G.K. “An Analysis of the Lubrication between the Piston Rings and Cylinder Wall of a Running Engine,” Proc. Instn. Mech. Engrs. 155 293 299 1946
- Wing, R.D. Saunders, O. “Oil Film Temperature and Thickness Measurements on the Piston Rings of a Diesel Engine,” Proc. Instn. Mech. Engrs. 186 1972
- Hamilton, G.M. Moore, S.L. “Measurement of the Oil-Film Thickness Between the Piston Rings and Liner of a Small Diesel Engine,” Proc. Instn. Mech. Engrs. 188 253 261 1974
- Hamilton, G.M. Moore, S.L. “Comparison Between Measured and Calculated Thicknesses of the Oil-Film Lubricating Piston Rings,” Proc. Instn. Mech. Engrs. 188 20 1974
- Moore, S.L. Hamilton, G.M. “The Starved Lubrication of Piston Rings in a Diesel Engine,” Journal Mechanical Engineering Science 20 6 345 352 1978
- Moore, S.L. “Measurement of the Ring to Liner Oil Film Thickness in a Caterpillar 1-G Diesel Engine,” SAE Paper 790730 1979
- Moore, S.L. Hamilton, G.M. “The Piston Ring at Top Dead Centre,” Proc. Instn. Mech. Engrs. 194 36 1980
- Moore, S.L. “Piston Ring Oil Film Thickness - The Effect of Viscosity,” SAE Paper 850439 1985
- Shin, K. Tateishi, Y. Furuhama, S. “Measurement of Oil Film Thickness Between Piston Ring and Cylinder,” SAE Paper 830068 1983
- Furuhama, S. Chikashi, A. Hiruma, M. “Measurement of Piston Ring Oil Film Thickness in an Operating Engine,” Trans. Am. Soc. Lubr. Engrs., No. 82-1C-6C-1 1982
- Ting, L. L. “Development of a Laser Fluorescence Technique for Measuring Piston Ring Oil Film Thicknesses,” J. of Lub. Tech. ASME April 1980 102 165 171
- Hoult, D.P. Lux, J.P. Wong, V.W Billian, S.A. “Calibration of Laser Fluorescence Measurements of Lubricant Film Thickness in Engines,” SAE paper 881587 1988
- Chen, S.K. Flynn, P.F. “Development of a Single Cylinder Compression Ignition Research Engine,” SAE Paper 650733 1965
- LeFeuvre, T. “Instantaneous Metal Temperatures and Heat Fluxes in a Diesel Engine,” Department of Mechanical Engineering University of Wisconsin-Madison 1968
- Huang, J.C. “Diesel Engine Cylinder Gas-Side Heat Transfer to a Ceramic Surface,” Department of Mechanical Engineering University of Wisconsin-Madison 1986
- King, W.H. April 17 1984
- Leschiutta, M.C. “Piston-Position Measurements in an IC-Engine using a Laser Range Finding Technique,” Department of Mechanical Engineering University of Wisconsin-Madison 1989
- Dück, G.E. Beyer, H. Mierbach, A. Piston Ring Manual Goetze AG, D-5093 Burscheid 1977
- Box, G.E.P. Hunter, W.G. Hunter, J.S. Statistics for Experimenters An Introduction to Design, Data Analysis, and Model Building,” John Wiley and Sons Inc. 1978
- Box, G.E.P. Jenkins, G.M. Time Series Analysis Forecasting and Control, Revised Edition Hoden-Day Inc. 1976
- Yonezawa, T. Kanada, H. “Analysis of Cavitation Erosion on Cylinder Liner and Cylinder Block,” SAE paper 850401 1985
- Suzuki, T. Usami, K. “A Modification of Combustion Systems for Low Exhaust Emission and Its Effects on Durability of Prechamber Diesel Engine,” SAE paper 760213 1976
- Affenzeller, J. Schreiber, E. Janisch, H. “Some Investigations About the Cavitation on Cylinder Liners of Diesel Engines,” ASME publication 80-DGP-27 1979