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

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Shape of Bore
Elastodynamics of Cylinder Liner

The natural frequencies



Continuous deformation of the liner profile under dynamic loads can affect ring-bore conjunction.

The elastodynamic behaviour of both ring and liner, together with initial manufacturing irregularities, results into a dynamic gap profile that requires essential analysis for tribological performance.  



Ring Elastodynamic Response
The ring bore is also affected by the dynamic behaviour of the ring to the various excitation forces. Ring dynamic response makes the ring-bore conjunction a transient affair according to engine speed and combustion loading.