Abstract The pre-ignition of lubricating oil is the main cause of super knock in gasoline direct injection (GDI) engine. This paper investigates the effect of thermal radiation, cylinder material and film thickness on evaporation characteristics of lubricating oil film using a radiation device under the condition of open space. The experimental results show that the mass loss rate of lubricating oil film is proportional to the film thickness. The thermal conductivity of the material which coated with lubricating oil film has a significant influence on the evaporation characteristics of oil film. There are three obvious stages in the mass change curve of lubricating oil film and a formula is developed to estimate the mass loss rate of the lubricating oil film during the second stage.

中文翻译：

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不同凹槽润滑油膜蒸发特性的实验研究

摘要 润滑油的提前点火是汽油直喷（GDI）发动机超爆震的主要原因。本文利用辐射装置研究了在开放空间条件下热辐射、气缸材料和油膜厚度对润滑油膜蒸发特性的影响。实验结果表明，润滑油膜的质量损失率与油膜厚度成正比。涂有润滑油膜的材料的导热系数对油膜的蒸发特性有显着影响。润滑油膜质量变化曲线有明显的三个阶段，并建立了第二阶段润滑油膜质量损失率的估算公式。