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首页> 外文期刊>Tribology International >High-resolution LIF-Imaging of the oil film thickness in the piston-ring/cylinder-liner contact in an optical tribometer
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High-resolution LIF-Imaging of the oil film thickness in the piston-ring/cylinder-liner contact in an optical tribometer

机译：在光学摩擦计中的活塞环/气缸衬里接触中的高分辨率Lif-agoping在活塞环/气缸衬里接触

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摘要

An optical tribometer is developed as a model experiment for the piston-ring/cylinder-liner assembly in an internal combustion engine. The tribometer replaces the reciprocating movement of the piston rings by the steady rotation of the cylinder liner against whose inside running surface a stationary piston-ring segment from sapphire is pressed. Through this transparent ring segment, the oil-film thickness was imaged by laser-induced fluorescence of a dye added to the oil. The images clearly show various oil-filled structures of the liner surface. After an in-situ calibration and stray-light correction, the minimum film thickness was quantitatively evaluated and compared to the corresponding friction coefficient. Compared to honed cast iron, pores in a spray-coated liner retain more oil and reduce friction at higher loads.
机译：光学摩擦计是作为内燃机中活塞环/缸衬里组件的模型实验。 摩擦计替换活塞环的往复运动通过柱面衬里的稳定旋转，其内部运行表面被按压从蓝宝石的固定活塞环段。 通过该透明环段，通过加入油的染料的激光诱导的荧光成像油膜厚度。 图像清楚地显示了衬垫表面的各种充气结构。 在原位校准和杂散光校正之后，定量评估最小膜厚度并与相应的摩擦系数进行比较。 与珩磨铸铁相比，喷涂衬垫中的孔保持更多的油并在较高载荷下减少摩擦。

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