Friction Analysis of Oil Control Rings during Running-In

Paper #:
  • 2011-01-2428

Published:
  • 2012-04-01
Citation:
Kunkel, S., Zimmer, T., and Wachtmeister, G., "Friction Analysis of Oil Control Rings during Running-In," SAE Int. J. Engines 5(3):747-758, 2012, https://doi.org/10.4271/2011-01-2428.
Pages:
12
Abstract:
This SAE Technical Paper will give a summary of the detailed results of crank-angle-resolved friction measurements which were carried out in motored and pressureless operation on a floating liner single cylinder test engine with a displacement of 0.5 liters. Friction forces that occur during running-in are introduced and discussed with regard to mixed friction and hydrodynamic friction for different oil control rings. Three different ring pre-loads are examined using constant geometries. In a second test series, the outer contour and coating is varied while the pre-load stays constant.
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