Effect of Soot Loading on the Thermal Characteristics of Diesel Engine Oils
Effect of Soot Loading on the Thermal Characteristics of Diesel Engine Oils
复制标题
烟灰负载对柴油机油热特性的影响
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
W. Yu
中科院分区：
文献类型：
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作者：
F. Lockwood;Z. G. Zhang;S. U. Choi;W. Yu
与新油相比，二手柴油机油的导热系数随着碳烟浓度的增加而增加。影响的大小取决于油的组成，以及烟尘颗粒的大小和分散程度。虽然从磨损和沉积的角度来看，发动机油中的烟尘通常对发动机性能有害，但对机油本身的热性能没有负面影响；事实上，对于保持烟尘稳定分散的机油来说，甚至有望产生轻微的积极影响。因此，在使用废气再循环的柴油发动机中，发动机油面临的热挑战将是防止烟尘沉积在发动机表面。
When compared with new oil, used diesel engine oils exhibited thermal conductivity that increases as the concentration of soot increases. The magnitude of the effect depends on the oil composition, and on the size and dispersion of the soot particles. Although soot in engine oil is generally deleterious to engine performance from the standpoint of wear and deposits, no negative effects were observed on the thermal performance of the oil itself; indeed, even slight positive effects are expected for oils that maintain soot in stable dispersion. Therefore, the thermal challenge for engine oils in diesel engines that use exhaust gas recirculation will be to prevent soot deposition on engine surfaces.