Work

Matching design for structural parameters of the dual-friction pair in a piston pin

Year: 2025

Type: article

Abstract: In the present study, a thermoelastic hydrodynamic (TEH) model was formulated to analyze the steel piston assembly in the D25TCIF diesel engine. The model facilitated the evaluation of the steel piston and connecting rod assembly by integrating elastohydrodynamic lubrication theory and heat transfer analysis. The influence of bearing structural parameters on the lubrication performance of the piston pin bearing system was analyzed by integrating experimental design with the Pareto multi-objective optimization algorithm. Subsequently, an optimized structural parameter design was explored to achieve a balanced lubrication performance within the piston pin bearing system. The results demonstrated that, compared to the original engine design, the oil film thickness of the pin bore bearing increased by 177.68 % (0.629 μm), while that of the small-end bearing of the connecting rod increased by 24.21 % (0.145 μm). Therefore, the proposed optimization method demonstrated significant effectiveness in enhancing lubrication performance.

Source: Case Studies in Thermal Engineering

DOI: 10.1016/j.csite.2025.106109

Authors: Jikun Chen, Jilin Lei, Yang Liu, Chengxi Wang, Wei Deng, Dongjun Sun

Institution: Kunming University of Science and Technology

Language: English

Topic: Tribology and Lubrication Engineering

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $1,620