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Lubrication Performance of Engine Commercial Oils with Different Performance Levels: The Effect of Engine Synthetic Oil Aging on Piston Ring Tribology under Real Engine Conditions

机译:不同性能水平的发动机商用油的润滑性能:在实际发动机条件下,发动机合成油的老化对活塞环摩擦学的影响

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To further improve efficiency in automotive engine systems, it is important to understand the generation of friction in its components. Accurate simulation and modeling of friction in machine components is, amongst other things, dependent on realistic lubricant rheology and lubricant properties, where especially the latter may change as the machine ages. Some results of research under laboratory conditions on the aging of engine commercial oils with different performance levels (mineral SAE 30, synthetic SAE10W-40, and bio-based) are presented in this paper. The key role of the action of pressure and temperature in engine oils’ aging is described. The paper includes the results of experiments over time in laboratory testing of a single cylinder motorbike. The aging of engine oil causes changes to its dynamic viscosity value. The aim of this work is to evaluate changes due to temperature and pressure in viscosity of engine oil over its lifetime and to perform uncertainty analysis of the measured values. The results are presented as the characteristics of viscosity and time in various temperatures and the shear rates/pressures. This paper also includes a Computational Fluid Dynamics (CFD) model, applying the experimental results in the piston ring tribology problem.
机译:为了进一步提高汽车发动机系统的效率,重要的是要了解其组件中摩擦的产生。机器零件中摩擦的精确模拟和建模尤其取决于实际的润滑剂流变性和润滑剂性能,尤其是后者可能会随着机器的老化而改变。本文介绍了在实验室条件下对具有不同性能水平(矿物SAE 30,合成SAE10W-40和生物基)的发动机商用油的老化的一些研究结果。描述了压力和温度作用在机油老化中的关键作用。本文包括了单缸摩托车实验室测试中随时间推移的实验结果。机油的老化会导致其动态粘度值发生变化。这项工作的目的是评估由于温度和压力引起的机油粘度在其整个使用寿命期间的变化,并对测量值进行不确定性分析。结果表示为在各种温度和剪切速率/压力下的粘度和时间的特征。本文还包括计算流体动力学(CFD)模型,将实验结果应用于活塞环摩擦学问题。

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