This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Calibration of Laser Fluorescence Measurements of Lubricant Film Thickness in Engines
Annotation ability available
Sector:
Language:
English
Abstract
A laser fluorescent diagnostic method was employed to measure lubricant film thickness on the cylinder wall/piston interface of two engines. The system output signal was calibrated using lubricant samples of known thickness, and by comparison of a known piston ring profile to measured lubricant film contours. Agreement of the results of the two calibration methods was within 5%. A relative calibration was performed with three oils having different additive packages, and with an oil contaminated through use in a commercially operated engine. The calibration coefficients for the oils, relating output voltage to film thickness, varied within a factor up to two, depending on lubricant type and age.
The laser fluorescent apparatus was installed for use with a single cylinder test version of the Cummins VT-903 diesel engine. An optical passage was created through the block and cylinder wall using a quartz window. Preliminary results in the motored engine indicate a lubricant film thickness of approximately two microns, at the upper portion of the cylinder wall, on the minor-thrust face.
Recommended Content
Authors
Topic
Citation
Hoult, D., Lux, J., Wong, V., and Billian, S., "Calibration of Laser Fluorescence Measurements of Lubricant Film Thickness in Engines," SAE Technical Paper 881587, 1988, https://doi.org/10.4271/881587.Also In
References
- SUTOR P. BRYZIK W. “Tribological Systems for High Temperature Diesel Engines,” SAE # 870157
- SHIN K. TATEISHI Y. FURUHAMA S. “Measurent of Oil Film Thickness Between Piston Ring and Cylinder,” SAE Paper No. 830068 1983
- WING R.D. SAUNDERS O. “Oil Film Temperature and Thickness Measurements on the Piston Rings of a Diesel Engine,” Proceedings of the Institution of Mechanical Engineers 186/172 1 9 1972
- SMART A.E. FORD R.A.J. “Measurement of Thin Liquid Films by a Fluorescence Techinique,” Wear 29 1984 41 47
- TING L.L. “Development of a Laser Fluorescence Technique for Measuring Piston Ring Oil Film Thicknesses,” ASME Paper #79-Lub-2 1979
- SHERRINGTON I. SMITH E.H. “Experimental Methods for Measuring the Oil Film Thickness between the Piston-Rings and Cylinder-Wall of Internal Combustion Engines,” Tribology International Dec. 1985 18 6 315 320
- HOULT D.P. RIFAI M. “Measurement of Oil Film Thickness on Piston Lands,” Third Symposium on Energy Engineering Sciences October 8-10, 1985 Pennsylvania State University
- PARKER C.A. “Photoluminescence of Solutions,” Elsevier Amsterdam 1968 72 74
- DUBOIS J.T. STEVENS B. “Lumnescence of Organic and Inorganic Materials,” Wiley New York 1962 115 131
- HOULT D.P. “Lubrication and Support of a Single Piston Ring,” 139 149 ASLE Transactions 28 1985