润滑油在燃烧汽油发动机活塞组件和曲轴箱中的雾状流动：粘指剂的影响以及与润滑油降解的联系

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2024-10-18 DOI:10.1007/s11249-024-01925-6

Christopher J. Dyson, Martin Priest, Peter M. Lee

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引用次数: 0

摘要

被称为雾化的液滴流是活塞组件内部和周围的重要润滑流动机制。因此，这对活塞组件摩擦学和发动机性能非常重要。有人假设曲轴箱润滑油降解率会受到流经活塞组件和曲轴箱的润滑油液滴流的影响，但此前并未得到证实。在长时间运行过程中，从油底壳、顶环区（TRZ）以及曲轴箱的雾气和气溶胶中采集了润滑油样本。对这些样本的物理和化学降解特性进行了分析。液滴流在降解和燃料稀释方面介于 TRZ 和油底壳之间。液滴较小的流体比液滴较大的流体降解程度更高。聚合物的降解取决于其分子结构。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Flow of Lubricant as a Mist in the Piston Assembly and Crankcase of a Fired Gasoline Engine: The Effect of Viscosity Modifier and the Link to Lubricant Degradation

Droplet flows, termed misting, are significant lubrication flow mechanisms to, in and around the piston assembly. Therefore, these are important in piston assembly tribology and engine performance. Crankcase lubricant degradation rate has been hypothesised to be influenced by lubricant droplet flows through the piston assembly and crankcase, but not previously confirmed. Lubricant was sampled from the sump, top ring zone (TRZ), and mist and aerosol from the crankcase during an extended run. The physical and chemical degradation of these samples was characterised. Droplet flows were intermediate in degradation and fuel dilution between TRZ and sump. Flows with smaller droplet sizes were more degraded that those with larger droplets. The degradation of polymers was dependent on their molecular architecture.

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.