R_Turnbull_TriboUK2016.pdf (243.95 kB)
Download fileElastodynamics of the compression ring for evaluation of ring-liner conformance
conference contribution
posted on 2016-05-25, 13:27 authored by Rob Turnbull, Rickie Bewsher, Mahdi Mohammadpour, Ramin RahmaniRamin Rahmani, Homer Rahnejat, Gunter OffnerThe piston ring pack accounts for a disproportionate
amount of the total engine losses (up to 25% of parasitic, with
the compression ring accounting for approximately 5% of
engine losses) [1], especially when considering the size of the
component. Certain challenges posed by a low carbon future,
coupled with the multitude of vehicles currently utilizing the
internal combustion engine and the expected global increase in
vehicle demand, motivates engineers to improve engine
efficiency. The paper aims to investigate the effect of piston
ring pack dynamics on the frictional losses. The ring dynamic
behaviour determines the contact in terms of ring-liner
conformability, applied load and kinematics. These are used as
key input parameters in tribological models which predict
contact pressure distribution, film thickness and generated
friction.
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