Measurement of Oil Film Thickness in the Main Bearings of an Operating Engine using Thin-Film Electrode

Paper #:
  • 2011-01-2117

Published:
  • 2011-08-30
Citation:
Kataoka, T., Kikuchi, T., and Ashihara, K., "Measurement of Oil Film Thickness in the Main Bearings of an Operating Engine using Thin-Film Electrode," SAE Int. J. Fuels Lubr. 5(1):425-433, 2012, https://doi.org/10.4271/2011-01-2117.
Pages:
9
Abstract:
Oil film thickness is one of the most important issues for optimization of bearing design. A technique has been developed to measure oil film thickness by noting the change in capacitance between the shaft and a thin-film electrode of several micrometers thickness formed on the surface of a bearing. The authors applied this technique to the main journals of an automobile engine and measured the oil film thickness up to maximum speed and full load. The oil film thickness became thinner with increased engine load, and then turned thicker with increased engine speed.
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