Abstract
The present design of piston ring packs and cylinder liners represents a development driven by environmental regulations, reliability and operating costs of two-stroke engines.The use of low-sulphur fuels, now a reality in several SECA (Sulphur Emission Control Area), an increasing demand from shipowners to be able to operate the engines without major overhauls between dockings and the cost of lube oil are some of the elements which have led to the present design for cylinder condition.This development started in the mid-1990s, resulting in the introduction of a new design in year 2000. Development in the area of lubrication has led to a new lubricator, the Alpha Lubricator. As a result of research, it has been possible to lower the feed rate significantly over the past 5 years.
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