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Tribological performance of three surface-modified piston rings matched with chromium-plated cylinder liner

Feng Zhu (Key Laboratory of Ship-Machinery Maintenance and Manufacture, Dalian Maritime University, Dalian, China)
Jiujun Xu (Key Laboratory of Ship-Machinery Maintenance and Manufacture, Dalian Maritime University, Dalian, China)
Xiaoguang Han (Key Laboratory of Ship-Machinery Maintenance and Manufacture, Dalian Maritime University, Dalian, China)
Yan Shen (Key Laboratory of Ship-Machinery Maintenance and Manufacture, Dalian Maritime University, Dalian, China)
Mei Jin (Key Laboratory of Ship-Machinery Maintenance and Manufacture, Dalian Maritime University, Dalian, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 13 March 2017

278

Abstract

Purpose

The paper aims to investigate the friction and wear properties of three surface-modified piston rings matched with a chromium-plated cylinder liner.

Design/methodology/approach

Samples were taken from the chromium-plated cylinder liner, Cr-Al2O3 ring, CrN ring and Mo ring. Tribo-tests were conducted on a reciprocating sliding tribometer under fully formulated engine oils. Friction coefficients and wear depths of three friction pairs were tested. Surface morphologies of cylinder liners and piston rings before and after test were analyzed.

Findings

Experimental results show that in the Cr-Al2O3 piston ring, scuffing occurred easily when matched with the chromium-plated cylinder liner; compared with the Mo ring, the CrN ring could decrease the wear depth of the piston ring from 2.7 to 0.2 μm, and the wear depth of cylinder liner remained; however, the friction coefficient increased from 0.113 to 0.123. The tribological performances of three surface-modified piston rings were significantly different when they matched with chromium-plated cylinder liner.

Originality/value

Chromium-plated cylinder liner and the three kinds of surface-modified piston rings have excellent friction and wear properties, respectively. However, according to the systematic characteristics of internal combustion (IC) engine tribology, only the appropriate cylinder liner–piston ring can improve the tribological performance of the IC engine. This paper reports the tribological performance of three surface-modified piston rings matched with a chromium-plated cylinder liner. The results can be used as reference for the design of high-power-density diesel engine.

Keywords

Acknowledgements

This work was supported by National Natural Science Foundation of China (51509029), the General Scientific Project of Liaoning Province Education Department (L2015065) and the Fundamental Research Funds for the Central Universities (3132015032).

Citation

Zhu, F., Xu, J., Han, X., Shen, Y. and Jin, M. (2017), "Tribological performance of three surface-modified piston rings matched with chromium-plated cylinder liner", Industrial Lubrication and Tribology, Vol. 69 No. 2, pp. 276-281. https://doi.org/10.1108/ILT-11-2015-0164

Publisher

:

Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited

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