Answer / prabhat patel

the function of piston rings are to provide clode tight
with cylinder.two piston rings are mounted in the piston.
one is upper piston ring and other is lower piston ring.
upper piston ring preventleakege of charge(a+f)from
cylinder to crankcase, while lower piston ring prevent the
leakege of oil from crankcase to cylinder.

Answer / sanjeev singh

the purpose of piston ring is to close tight air in
cylinder so that the air can not pass out side through
piston wall during the compression and expension.

Answer / neeraj

piston rings are used for the following purpose

1. to prevent the leakage of the highly compressed charge
from cylinder to crank case.

2. to provide lubrication from the oil rings.

3. contact area between rings and cylinder is minimum as
compare to piston and cylinder so it reduce the friction
becoz of minimum area of contact.

4. price of piston is much higher than the rings, so it
reduces the maintance cost of the engine.

Answer / pavithra kumar.t

the main function of piston rings are:
(i)to seal the space between cyclinder wall and piston, preventing the escape of burning gas.
(ii)to dissipate heat to the cyclinder walls
(iii)to control the flow of oil.

Answer / kole

To disallow air or oil from the connecting rod incase of
internal combustion engine to the compressing chamber

Answer / pavani

the purpose of piston rings are to prevent leakage and
lubrication purpose. lubricating oil will takes away the
heat and dust

Answer / muhammaddin

there are three piston rings 1st used for pressure 2nd used
for friction minimize ring and 3rd used for oil

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