シリンダーの潤滑(1) -オイル・ストレスと高湿度下のスカッフィングの原因
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概要
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Oil stress is the single most important factor that governs the lifetime and performance of an engine lubricant. While oil stress in four-stroke marine diesel engines has been well introduced in literature, oil stress in two-stroke engines has yet to be tackled with the same level of detail as that in four-stroke engines. Therefore, this paper will describe in detail oil stress in two-stroke engines. During experiments on the establishment of oil stress in two-stroke engines in ships, a correlation between BN depletion and intake air humidity was found to exist. This correlation was the reverse for the case of the fuel's sulfur value.<BR>In relation to the above findings, the cause of scuffing under high humidity conditions is also discussed.