一种通过减小流体动力摩擦损失来降低重型柴油机摩擦损失的新方法

IF 1.5 Q3 ENGINEERING, MECHANICAL
Staffan Johansson, P. Nilsson, R. Ohlsson, B. Rosén
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引用次数: 5

摘要

降低重型柴油机油耗的一个重要参数是动力缸单元(PCU);PCU是造成发动机摩擦损失的最大因素。学术界和工业界都非常关注如何减少PCU在边界润滑和混合润滑状态下的摩擦损失。然而,先前的研究表明,在PCU摩擦损失的很大一部分发生在流体动力润滑制度。利用摩擦计装置对一种具有大量表面特征的新型纹理设计进行了实验分析。实验结果表明,织构表面的摩擦损失显著降低。此外,纹理表面没有出现磨损。相反,与参考平台珩磨表面相比,纹理表面在高原上表现出较少的磨蚀划痕,这是由于纹理内捕获了磨损颗粒。织构表面流体动力摩擦的减小与织构内油膜厚度的相对增加有关。给出了一个试探性的例子,描述了在实际应用中减小水动力摩擦损失的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Novel Approach to Reduction of Frictional Losses in a Heavy-Duty Diesel Engine by Reducing the Hydrodynamic Frictional Losses
An important parameter in the reduction of fuel consumption of heavy-duty diesel engines is the Power Cylinder Unit (PCU); the PCU is the single largest contributor to engine frictional losses. Much attention, from both academia and industry, has been paid to reducing the frictional losses of the PCU in the boundary and mixed lubrication regime. However, previous studies have shown that a large portion of frictional losses in the PCU occur in the hydrodynamic lubrication regime. A novel texturing design with large types of surface features was experimentally analyzed using a tribometer setup. The experimental result shows a significant reduction of friction loss for the textured surfaces. Additionally, the textured surface did not exhibit wear. On the contrary, it was shown that the textured surfaces exhibited a smaller amount of abrasive scratches on the plateaus (compared to the reference plateau honed surface) due to entrapment of wear particles within the textures. The decrease in hydrodynamic friction for the textured surfaces relates to the relative increase of oil film thickness within the textures. A tentative example is given which describes a method of decreasing hydrodynamic frictional losses in the full-scale application.
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来源期刊
Advances in Tribology
Advances in Tribology ENGINEERING, MECHANICAL-
CiteScore
5.00
自引率
0.00%
发文量
1
审稿时长
13 weeks
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