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ENCYCLOPAEDIC

Refinement of Engine In-Cycle Losses of Parasitic and Errant Dynamic Nature

Home  Research Programme  Surface Tribology  Top Compression Ring  Cylinder Liner  Piston Skirt  Experiments   
Conformance
Ring Shape
Conjunctional Geometry
In Situ Ring Shape
 
The top compression ring is an incomplete circular ring, it seals the combustion chamber, guarding against power loss due to gas leakage as well as lubricant contamination.
Interaction of the compression ring against the liner accounts for approximately 3-5% of all engine energy losses; therefore measurement of ring-bore conformance is a critical issue.