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On the running-in behavior of rough surface of piston rings in mixed lubrication regime

Jun Cheng (State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai, People’s Republic of China and School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai, People’s Republic of China)
Xianghui Meng (State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, China and School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China)
Youbai Xie (State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai, People’s Republic of China and School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai, People’s Republic of China)
Wenxiang Li (Research and Development Center of China's First Automotive Works (FAW) Group, Changchun , People’s Republic of China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 10 August 2015

316

Abstract

Purpose

The purpose of this paper is to study the real-time change of surface roughness at different small regions of piston rings during running-in process. Meanwhile, the effects of real-time change of the rough surface topography on the lubrication and friction of piston rings are investigated.

Design/methodology/approach

An uneven wear model has been developed to research the running-in behavior at the different small regions of piston rings. The model is verified by comparing the simulation results with the experimental results on a reciprocating friction and wear test rig.

Findings

This research shows that the wear process of piston ring surface is uneven during running-in. At most time of the operating cycle except the vicinity of top dead center and bottom dead center, the minimum oil film thickness ratio increases while the friction force and power loss decrease after the running-in period.

Originality/value

Through this research, the running-in behavior of piston rings is investigated in detail. The interaction between the running-in and the lubrication and friction of piston rings is understood more deeply.

Keywords

Acknowledgements

This research is supported by the National Natural Science Foundation of China (Grant No. 51375300) and the Research Project of State Key Laboratory of Mechanical System and Vibration (Grant No. MSVZD201401).

Citation

Cheng, J., Meng, X., Xie, Y. and Li, W. (2015), "On the running-in behavior of rough surface of piston rings in mixed lubrication regime", Industrial Lubrication and Tribology, Vol. 67 No. 5, pp. 468-485. https://doi.org/10.1108/ILT-01-2015-0003

Publisher

:

Emerald Group Publishing Limited

Copyright © 2015, Emerald Group Publishing Limited

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