| 摘要 |
PROBLEM TO BE SOLVED: To provide an MDCL for being used in a marine crosshead engine of an LNG and a similar fuel.SOLUTION: A two-stroke, cross-head, slow-speed, compression-ignited marine engine is operated by: (i) a step fuelling it with a diesel fuel, as a pilot fuel, and with a low sulphur fuel, as a main fuel; and (ii) a step lubricating the engine cylinder(s) with a lubricant having a BN of 20 or less and having a detergent additive system comprising at least two different metal detergents each having one surfactant group selected from phenate, salicylate and sulfonate, or one or more complex metal detergents containing two or more different surfactant soap groups selected from phenate, salicylate and sulfonate. |
