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Lubricants 2019, 7(1), 8; (registering DOI)

The Influence of a Piston Ring Coating on the Wear and Friction Generated during Linear Oscillation

Electrical and Computer Engineering Department, Stony Brook University, Stony Brook, NY 11794, USA
Optimol Instruments Prüftechnik GmbH, Westendstraße 125, 80339 München, Germany
Koehler Instrument Company, Inc., 85 Corporate Drive, Holtsville, NY 11742, USA
Authors to whom correspondence should be addressed.
Received: 24 June 2018 / Revised: 30 December 2018 / Accepted: 10 January 2019 / Published: 14 January 2019
(This article belongs to the Special Issue Advanced Lubrication for Energy Efficiency)
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The piston group is responsible for contributing to ~50% of the frictional losses of an engine, which ultimately leads to the waste of fuel. This coupled with the fact that gasoline is a finite resource linked to CO2-emissions, there is an increased demand of higher performance vehicles, which coincidently further loads the piston ring. As of yet, there are plenty of studies that already study the piston ring’s contact with the cylinder liner. However, this study focuses on a cost-effective Schwing, Reib, Verschleiss (SRV) instrumentation that allows to pre-screen lubricants, additives, materials and coatings for their friction, wear and load carrying capacity including scuffing resistance. As a result of the pre-screening conducted outside of engine by using the SRV instrument, it brings us to the following conclusion: the PVD CrN-TiN 1º Group coating on the piston ring produces the least wear, as well as the lowest coefficient of friction. Moreover, it is concluded that a coating that is based from CrN and TiN allows the piston ring to perform better in engine settings. A continued understanding of the piston-cylinder-contact assembly only helps engineers, scientists and any other stakeholder to improve on the piston ring and cylinder liner interaction. View Full-Text
Keywords: internal combustion engine; compression rings; viscosity internal combustion engine; compression rings; viscosity

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Rozario, A.; Baumann, C.; Shah, R. The Influence of a Piston Ring Coating on the Wear and Friction Generated during Linear Oscillation. Lubricants 2019, 7, 8.

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