Abstract
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.
In relation to the above findings, the cause of scuffing under high humidity conditions is also discussed.
