Thesis-2014-Baker.pdf (6.31 MB)
0/0

The effect of transient dynamics of the internal combustion compression ring upon its tribological performance

Download (6.31 MB)
thesis
posted on 31.01.2014 by Christopher E. Baker
The 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. Baker

Publication date

2014

Notes

A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.

Language

en

Exports

Logo branding

Exports