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What Is The main function of compression ring?

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  • What Is The main function of compression ring?



    What Is The main function of compression ring?

  • #2

    seal the space between the piston and the liner.

    High pressure gases due to combustion enters behind the piston rings. This pushes the piston rings in the outward direction to have a good contact between liner and the piston rings. At the same time, piston rings are also pushed downwards on the piston ring landing grooves. Thus it forms a complete sealed space above the piston rings in between the liner and the piston. Hence the force of gas behind the piston rings which forces the piston rings outwards is of prime importance. If the piston rings are seized or the grooves are not clear i.e. it is obstructed with carbon, there is a possibility the piston rings will not have proper contact with the liner and blowpast will take place which will cause breaking of piston rings and scuffing.

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