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Friction Analysis of Oil Control Rings during Running-In

Journal Article
2011-01-2428
ISSN: 1946-3936, e-ISSN: 1946-3944
Published April 01, 2012 by SAE International in United States
Friction Analysis of Oil Control Rings during Running-In
Sector:
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.
Language: English

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.