Thesis-2014-Baker.pdf (6.31 MB)
The effect of transient dynamics of the internal combustion compression ring upon its tribological performance
thesis
posted on 2014-01-31, 11:39 authored by Christopher E. BakerThe losses in an internal combustion engine are dominated by thermal and parasitic
sources. The latter arises from mechanical inefficiencies inherent within the system,
particularly friction in load bearing conjunctions such as the piston assembly. During idle
and at low engine speeds, frictional losses are the major contributor to the overall engine
losses as opposed to the dominant contribution of thermal losses under other driving
conditions. Given the relatively small size and simple structure of the top compression ring,
it has a disproportionate contribution to the total frictional losses. This suggests further
analysis would be required to understand the underlying causes of compression ring
behaviour throughout the engine cycle. The available literature on tribological analyses of
compression rings does not account for the transient ring elastodynamics. They usually
assume a rigid ring for film thickness and power loss predictions, which is not representative
of the ring’s dynamic response. A combined study of ring elastodynamic behaviour and its
tribological conjunction is a comprehensive approach. [Continues.]
Funding
EPSRC
History
School
- Mechanical, Electrical and Manufacturing Engineering
Publisher
© Christopher E. BakerPublication date
2014Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.Language
- en