Marine Engine Cylinder Lubrication System

#cylinderoil #lubrication
The Exhaust chamber of the engine is where all the power is generated. Hence, it is crucial to maintain lubrication supply into these areas. This is maintained by a marine engine cylinder lubrication system, which supplies lube oil through quills into the lines.
This is a simple explanatory video showing how lubricating oil quills are arranged in a 2 Stroke Marine Engine Cylinder Liner. The supply of oil (timing) may vary depending upon the manufacturer, type of engine, and the fuel used in the combustion chamber.

[@bipinmisra1409]

Quills receive oil from where?

[@anilkumar7424]

Where does the oil go after lubrication..it gets fired?

[@anirudhrox8839]

part of it is evaporated.. some portion goes to the scavenge space which is collected in scavenge drain tank.. the scavenge spaces are to be periodically cleaned of these deposits..

[@kasunabeysekera3602]

Nice & simple explanation. Thanks

[@marineinsight]

Thank you

[@krajesh5049]

If rings are completely compressed along the wall of the liner how it can spray oil for lubrication

[@kras00]

Why not all quills wrk at each stroke?

[@yellowpwns97]

its not necessary

[@marineinsight]

The amount of oil required can be maintained by one set

[@reddevilyt3831]

Good....

[@marineinsight]

Thank you

[@abeersrivastava5048]

why are not all lubricating quills secreting LO , why is it alternate ?

[@marineinsight]

To avoid over lubrication. In the four-stroke trunk piston engine, the cylinder liner is virtually “over-lubricated” with, as mentioned above, an oil scraper ring on the piston scraping the surplus oil back to the oil pan. However, two-stroke crosshead engine has no connection between the piston underside space and the bedplate with the oil pan, and hence cylinder lubrication differs considerably from the four-stroke trunk piston engine.
In the two-stroke crosshead engine, the piston has no oil scraper ring and the cylinder oil is not recycled and reused, i.e. once it has left the lubricating device it is virtually “lost”, which means that the dosage of cylinder oil is crucial. The cylinder lubricating oil in a two-stroke crosshead engine is - regardless of engine size and make - usually supplied from an external, separate cylinder
lubricating device via quills in the cylinder liner.

[@amolpawar90]

can you show the fuel oil inlet outlet, lub oil drain system,sealing oil pipe & Gas pipe arrangements?

[@suryaapov7340]

Where does the oil go after lubrication?

[@thewanderer3282]

gets burnt/drained via stuffing box.

[@bimbimcool]

stuffing box drain oil from crankcase, when you have a worn piston rod and stuffing box.
cylinder oil drains through scavenge drain tank, separated to stuffing box oil.

[@EricVirtueable]

An accent?

[@abdulrahiman5784]

Why quills doesn't inject oil during downward movement of piston

[@marineinsight]

As the piston moves up, it will be approacing a state where combustion will happen. Hence during the downward stroke ( as hot gas combustion just happened) the oil will already been spread as it was injected when the piston was moving up which will help in further lubrication. 👍🏻

[@akhileshsawant7388]

@@marineinsight Is it also to counter the by product of combustion due to F.O since the oil is relatively high in TBN?

[@kumarpremranjansingh4408]

Does this kind of arrangement is provided both for 2 stroke and 4 stroke engine?

[@marineinsight]

There is difference in cylinder lubrication system of 2 and 4 stroke. The video shows a marine 2 stroke engine cylinder lubrication.
Crankcase oil splash lubrication is used in 4 stroke engine.

[@thewanderer3282]

no, 4 strokes do not need cylinder lubrication, splash lubrication is used on them