Measurement of Oil Film Thickness in the Main Bearings of an Operating Engine using Thin Film Electrode
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概要
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Minimum oil film thickness is one of the most important issues for optimization of a bearing design. We developed a technique to measure an oil film thickness by the change in capacitance between the shaft and a thin-film electrode of several micrometers thickness formed on the surface of a bearing. Measured oil film thickness with thin film electrode corresponded to the calculated value with the elasto-hydrodynamic lubrication theory. The Authors applied this technique to the main journals of a nautomobile engine and measured their oil film thickness up to maximum speed and full load. The oil film thickness became thinner with the increase of engine load, and became turned thick with the increase of engine speed. Furthermore, we measured an oil film thickness by the total capacitance method, the conventional method, and compared the two values.
- 公益社団法人 自動車技術会の論文
公益社団法人 自動車技術会 | 論文
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