Piston Ring
When the internal combustion engine is running, piston moves up and down in the cylinder to convert combustion energy to mechanical action. Piston rings seal the combustion chamber and is subject to constant friction during motion. Conventional coating can not meet the friction reduction requirement. i-TAC® deposits a thick layer of ta-C (tetrahedral amorphous carbon) coating with hardness up to 3,500HV on the piston ring. It reduces the coefficient of friction to less than 0.1, increases airtightness, improves fuel efficiency, reduces carbon emission, extends piston ring lifespan and reduces maintenance needs.
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