To improve the lubrication and tribology performance (LTP) of the crankpin bearing, this paper aims to propose the optimization of the crankpin bearing parameters considering effect of the high-speed dynamic load and micro asperity contact.,A numerical simulation method combined by the slider-crank-mechanism dynamic and lubrication models is applied to solve the dynamic and lubrication equations of crankpin bearing. These equations are then computed via an algorithm program written in Matlab software. The contact force (Wac) in the asperity contact region, friction force (Ff) and friction coefficient (μ) of crankpin bearing are chosen as objective functions. The original parameters and experimental data of the engine are used for the simulation to enhance the reliability of the research results. The parameters are then optimized to obtain the minimum values of Wac, Ff and μ.,The research results show that the LTP is significantly improved with optimized parameters. Particularly, the maximum values of Wac and Ff are greatly decreased by 27 and 32%, respectively.,Reducing the width, radius and surface roughness and increasing the radial clearance of crankpin bearing can improve better the LTP.,The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2020-0072/

中文翻译：

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考虑微粗糙接触影响的动态载荷下曲柄销轴承润滑优化

为提高曲柄销轴承的润​​滑和摩擦学性能（LTP），本文旨在提出考虑高速动载荷和微细凹凸接触影响的曲柄销轴承参数优化，一种结合滑块的数值模拟方法应用曲柄机构动力学和润滑模型求解曲柄销轴承的动力学和润滑方程。然后通过用 Matlab 软件编写的算法程序计算这些方程。选择凹凸接触区的接触力（Wac）、曲柄销轴承的摩擦力（Ff）和摩擦系数（μ）作为目标函数。仿真采用发动机的原始参数和实验数据，增强了研究结果的可靠性。然后对参数进行优化以获得Wac、Ff和μ的最小值，研究结果表明，优化参数后LTP得到显着改善。特别是Wac和Ff的最大值分别大大降低了27%和32%。,减小曲柄销轴承的宽度、半径和表面粗糙度以及增加径向游隙可以更好地提高LTP。,对此的同行评审历史文章可在：https://publons.com/publon/10.1108/ILT-02-2020-0072/