Title: Improving engine's lubrication based on optimised partial micro-textures

Authors: Jili Zha; Vanliem Nguyen; Tianfeng Ye

Addresses: School of Mechanical and Electrical Engineering, Hubei Key Laboratory of Intelligent Conveying Technology and Device, Hubei Polytechnic University, Huangshi, 435003, China ' School of Mechanical and Electrical Engineering, Hubei Key Laboratory of Intelligent Conveying Technology and Device, Hubei Polytechnic University, Huangshi, 435003, China ' College of Electrical and Electronic Information Engineering, Hubei Polytechnic University, Huangshi, 435003, China

Abstract: The partial textures (PT) used by spherical textures (ST), circular cylinder textures (CCT), conical textures, wedge-shaped textures (WST), and square cylinder textures are designed on the crankpin-bearing (CB) to improve the lubrication of an engine. Based on the lubrication model of CB, the effect of PT's dimension/distribution densities on the lubrication performance is analysed. Radius and depth of PT are then optimised to maximise lubrication of an engine. This study's objective is the decrease F_f (CB's friction force) and increase p (oil film's pressure). Results indicate that engine's lubrication using PT is better than using full textures. Also, the lubrication in an engine using ST is also better than using other PT. Especially, with ST optimised, both maximum p and F_f are ameliorated by 8% and 25% in comparison with full textures. Consequently, CB's bearing surface designed by optimised ST should be applied to further improve engine's lubrication.

Keywords: lubrication model; crankpin bearing; spherical textures; conical textures; square cylinder textures; wedge shaped textures; optimisation algorithm; lubrication performance.

DOI: 10.1504/IJCMSSE.2023.135838

International Journal of Computational Materials Science and Surface Engineering, 2023 Vol.11 No.3/4, pp.233 - 252

Received: 11 Feb 2023
Accepted: 26 Jun 2023
Published online: 08 Jan 2024 *