US 12,448,585 B2
Production of cylinder oil
Shamba Jumaine, Copenhagen K (DK); Henrik Bak Weimar, Copenhagen K (DK); and Mark Patrick Embleton, Copenhagen K (DK)
Assigned to A.P. Møller-Mærsk A/S, Copenhagen (DK)
Filed by A.P. Møller-Mærsk A/S, Copenhagen K (DK)
Filed on Aug. 10, 2023, as Appl. No. 18/447,398.
Application 18/447,398 is a continuation of application No. PCT/EP2022/053288, filed on Feb. 10, 2022.
Claims priority of application No. PA202100158 (DK), filed on Feb. 11, 2021.
Prior Publication US 2023/0383213 A1, Nov. 30, 2023
Int. Cl. C10M 171/02 (2006.01); C10N 20/02 (2006.01); C10N 30/00 (2006.01); C10N 30/02 (2006.01); C10N 40/25 (2006.01); C10N 70/00 (2006.01); F01M 9/02 (2006.01)
CPC C10M 171/02 (2013.01) [F01M 9/02 (2013.01); C10N 2020/02 (2013.01); C10N 2030/02 (2013.01); C10N 2030/52 (2020.05); C10N 2040/252 (2020.05); C10N 2070/00 (2013.01); F16N 2200/12 (2013.01); F16N 2210/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for producing a cylinder oil for a marine reciprocating internal combustion engine, the method comprising:
providing a first fluid having a first kinematic viscosity and a first BN;
providing a second fluid having a second kinematic viscosity and a second BN;
providing a third fluid having a third kinematic viscosity and a third BN;
obtaining data identifying a target kinematic viscosity of a cylinder oil to be produced;
obtaining data identifying a target BN of the cylinder oil to be produced;
obtaining data identifying the kinematic viscosity and the BN of each of the first fluid, the second fluid, and the third fluid;
either:
(a) based on at least the target kinematic viscosity of the cylinder oil to be produced, the kinematic viscosity and the BN of each of the first fluid, the second fluid, and the third fluid, determining a BN range for the cylinder oil having an upper limit and a lower limit, the determining the BN range for the cylinder oil comprising:
solving:

OG Complex Work Unit Math
wherein:
BNC1 is a first calculated BN for the cylinder oil,
BNC2 is a second calculated BN for the cylinder oil,
BNC3 is a third calculated BN for the cylinder oil,
ViC(T) is a value corresponding to the target kinematic viscosity of the cylinder oil to be produced,
Vi1 is a value corresponding to the kinematic viscosity of the first fluid,
Vi2 is a value corresponding to the kinematic viscosity of the second fluid,
Vi3 is a value corresponding to the kinematic viscosity of the third fluid,
BN1 is the BN of the first fluid or a value corresponding to the BN of the first fluid,
BN2 is the BN of the second fluid or a value corresponding to the BN of the second fluid, and
BN3 is the BN of the third fluid or a value corresponding to the BN of the third fluid;
determining the highest value of BNC1, BNC2, and BNC3;
setting the determined highest value as the upper limit of the determined BN range;
determining the second-highest value of BNC1, BNC2, and BNC3;
setting the determined second-highest value as the lower limit of the determined BN range;
and
determining that the target BN of the cylinder oil is equal to the upper limit or lower limit of the determined BN range, or is between the upper limit and lower limit of the determined BN range, and
determining a ratio of first fluid, second fluid, and third fluid which corresponds to the target kinematic viscosity and the target BN;
or
determining that the target BN of the cylinder oil is greater than the determined upper limit of the determined BN range, and
determining a ratio of first fluid, second fluid, and third fluid which corresponds to the target kinematic viscosity and the upper limit of the determined BN range;
or
determining that the target BN of the cylinder oil is lower than the determined lower limit of the determined BN range, and
determining a ratio of first fluid, second fluid, and third fluid which corresponds to the target kinematic viscosity and the lower limit of the determined BN range;
or
(b) based on at least the target BN of the cylinder oil to be produced, the kinematic viscosity of each of the first fluid, second fluid, and third fluid, and the BN of each of the first fluid, second fluid, and third fluid, determining a kinematic viscosity range for the cylinder oil having an upper limit and a lower limit, the determining the kinematic viscosity range for the cylinder oil comprising:
solving;

OG Complex Work Unit Math
wherein:
ViC1 is a first calculated value corresponding to a kinematic viscosity for the cylinder oil,
ViC2 is a second calculated value corresponding to a kinematic viscosity for the cylinder oil,
ViC3 is a third calculated value corresponding to a kinematic viscosity for the cylinder oil,
BNC(T) is the target BN of the cylinder oil to be produced,
Vi1 is a value corresponding to the kinematic viscosity of the first fluid,
Vi2 is a value corresponding to the kinematic viscosity of the second fluid,
Vi3 is a value corresponding to the kinematic viscosity of the third fluid,
BN1 is the BN of the first fluid or a value corresponding to the BN of the first fluid,
BN2 is the BN of the second fluid or a value corresponding to the BN of the second fluid, and
BN3 is the BN of the third fluid or a value corresponding to the BN of the third fluid;
determining the lowest value of ViC1, ViC2, and ViC3;
setting the determined lowest value as the lower limit of the determined kinematic viscosity range;
determining the second-lowest value of ViC1, ViC2, and ViC3;
setting the determined second-lowest value as the upper limit of the determined kinematic viscosity range; and
determining that the target kinematic viscosity of the cylinder oil is equal to the upper limit or lower limit of the determined kinematic viscosity range, or is between the upper limit and lower limit of the determined kinematic viscosity range, and
determining a ratio of first fluid, second fluid, and third fluid which corresponds to the target kinematic viscosity and the target BN;
or
determining that the target kinematic viscosity of the cylinder oil is greater than the determined upper limit of the determined kinematic viscosity range, and
determining a ratio of first fluid, second fluid, and third fluid which corresponds to the target BN and the upper limit of the determined kinematic viscosity range;
or
determining that the target kinematic viscosity of the cylinder oil is lower than the determined lower limit of the determined kinematic viscosity range, and
determining a ratio of first fluid, second fluid, and third fluid which corresponds to the target BN and the lower limit of the determined kinematic viscosity range;
and
blending the first fluid, second fluid, and third fluid in the determined ratio to produce the cylinder oil.