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Tribology Letters
Published in: Tribology Letters 3/2023

01-09-2023 | Original Paper

Molecular Dynamics Investigation on Micro-Friction Behavior of Cylinder Liner-Piston Ring Assembly

Authors: Tongyang Li, Jing Wu, Chang Ge, Lujie Wang, Yuan Yu, Xuan Ma, Zhuhui Qiao, Huaguo Tang

Published in: Tribology Letters | Issue 3/2023

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Abstract

In the vicinity of the top dead center of a diesel engine, the piston rings operate in a low-speed, high-load, and high-temperature environment, which is detrimental to the formation of an effective lubrication oil film. Consequently, it presents significant challenges for predicting the tribological characteristics of the piston ring-cylinder liner friction (PRCL) assembly. This study explores the micro-friction behavior of PRCL assemblies near the top dead center in engines using the molecular dynamics approach. The tribological characteristics of the PRCL, especially the microscopic wear mechanisms, were analyzed under various operating conditions such as ring sliding speed, ring back load, operating temperature, and lubricant supply amount. The liner surface morphology, liner wear, and lubricant film distribution were used to evaluate the tribological characteristics. It was determined that the lubricant supply amount has the most significant impact on the micro-friction behavior of the PRCL assembly.

Graphical Abstract

previous article Expanding Fluidized Zones: A Model of Speed-Invariant Lubricity in Biology
next article Study on the Correlation Mechanism Between Wear Failure Behavior and the TRIP Effect of Retained Austenite in Bainitic Steel

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Metadata
Title
Molecular Dynamics Investigation on Micro-Friction Behavior of Cylinder Liner-Piston Ring Assembly
Authors
Tongyang Li
Jing Wu
Chang Ge
Lujie Wang
Yuan Yu
Xuan Ma
Zhuhui Qiao
Huaguo Tang
Publication date
01-09-2023
Publisher
Springer US
Published in
Tribology Letters / Issue 3/2023
Print ISSN: 1023-8883
Electronic ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-023-01749-w

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