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TYPES OF LUBRICATION
SYSTEM
Mist Lubrication system
Wet Sump Lubrication system
Dry Sump Lubrication system
DONE BYC.BALA
GOWTHAM(11M110)P.V.BALAJI(11M111)M.GOPINATH(11M114)T.KAVIPRASAD(11M123)SATISHKASILINGAM(11M149)C.N.MADHAN(12M402)
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Mist Lubrication system
Mainly for 2 stroke engines-Crankcase lubricationimpossible
Lubricating oil mixed with fuel(3%-6%)
Oil and fuel mixture is inducted through thecarburettor
Fuel is vapourised and oil in the form of mist goesvia the
crankcase into the cylinder
Thus oil striking the crankcase walls lubricates themain and
connecting rod bearings,piston,pistonrings and cylinder
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ADVANTAGES
No pump required
No filter required
Simplicity Low cost
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DISADVANTAGES
CAUSES HEAVY EXHAUST SMOKE due to
burning of lubricating oil partially
Forms deposits on the piston crown and
exhaust ports
Corrosion of bearing surface as the oil comes
in contact with acidic vapours produced
during the combustion
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Wet Sump Lubrication system
Bottom of the crankcase contains an oil sump
from where it is pumped to various parts of
the cylinder
After lubricating these parts ,the oil flows back
to the sump by gravity
Again it is picked up by the pump and is
recirculated
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Components:
Pump
Strainer Pressure regulator
Filter
Breather
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Types of WET SUMP LUBRICATION
SYSTEM
SPLASH SYSTEM
SPLASH AND PRESSURE SYSTEM
PRESSURE FEED SYSTEM
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SPLASH SYSTEM
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Oil is charged into bottom of the engine crankcase
Oil is delivered through a distributing pipe extendingthe length
of the crankcase into splash troughs locatedunder the big end of
the connecting rods
Troughs are provided with overflows to maintainconstant
level
DIPPER-under each connecting rod cap
It dips into the oil in the trough at every revolution of
the crankshaft Then oil is splashed all over the interior of
the
crankcase
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Hole is drilled through the connecting rod
through which oil is passed to the bearing
surface
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SPLASH AND PRESSURE SYSTEM
Oil - supplied under pressure to pipes which
direct a stream of oil against the dippers on
the big end of connecting rod bearing cup and
the crankpin bearings are lubricated by the
splash or spray of oil thrown up by the dipper
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PRESSURE FEED SYSTEM
Oil is drawn in from the sump-forced to all the
main bearings
Pressure relief valvefitted near the delivery
point of the pump that opens when the
pressure in the system attains a
predetermined value
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