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1. (WO2017032383) METHOD AND APPARATUS FOR PREPARING AN OIL TO BE SUPPLIED TO THE CYLINDERS OF A TWO-STROKE CROSSHEAD ENGINE

Pub. No.:    WO/2017/032383    International Application No.:    PCT/DK2016/050286
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Thu Aug 25 01:59:59 CEST 2016
IPC: F01M 9/02
C10M 177/00
F16N 39/08
Applicants: A.P. MØLLER - MÆRSK A/S
Inventors: OLSSON, Martin
WEIMAR, Henrik Bak
EMBLETON, Mark
Title: METHOD AND APPARATUS FOR PREPARING AN OIL TO BE SUPPLIED TO THE CYLINDERS OF A TWO-STROKE CROSSHEAD ENGINE
Abstract:
A method for preparing an oil to be supplied to the cylinders of a two-stroke crosshead engine (1) with crossheads (5), pistons in cylinder liners (2) and with a crankcase lubrication system operating with system oil, the method comprising: - determining or estimating the actual cylinder liner temperature, - determining an actual desired viscosity for the oil that is supplied to the cylinders at the determined actual cylinder liner temperature, - withdrawing system oil from the crankcase lubrication system and/or providing a base oil, - preparing an oil for supplying to the cylinders by blending the withdrawn system oil and/or base oil with a TBN agent, and - adjusting the viscosity of the prepared oil to the actual desired viscosity by blending the prepared oil with a viscosity agent to obtain a viscosity adjusted oil to be supplied to the cylinders.