Estimation Of The Tribotechnical Parameters
Of The \“piston Skirt–cylinder Liner” Contact
Interface From An IC-engine For Decreasing The
Mechanical Losses
Author(s)
V. Lazarev, K. Gavrilov, A. Doikin, G. Vorlaufer
& J. Sequard-Base
Abstract
To decrease mechanical losses in internal combustion engines (ICE) a deeper
understanding of the friction and wear processes in the main tribosystems is
necessary. In particular, the interrelation between frictional energy and wear has
to be analyzed. For this reason the hard to measure quantity of coefficient of
accumulation of frictional energy, which is a pivotal parameter in some energy
based wear theories, is determined in this work using model tribometer
experiments.
The experiments are performed using small specimens made of aluminium
silicon alloy and gray cast iron with a SRV tribometer (linear reciprocating
motion) where loading and lubrication conditions which closely simulate the real
contact situation of a piston skirt sliding against a cylinder liner near the top dead
center are applied.
To calculate the coefficient of accumulation of frictional energy,
experimentally gained values for the linear integral intensity of wear are
analyzed numerically for various loading parameters (normal load, sliding speed,
conditions of lubrication) which result in variation of the coefficient of friction
and in the amount of wear.
Finally the results of the correlation between the coefficient of accumulated
energy in the piston skirt–cylinder liner tribosystem and the loading conditions
Energy Production and Management in the 21st Century, Vol. 1 625
www.witpress.com, ISSN 1743-3541 (on-line)
WIT Transactions on Ecology and The Environment, Vol 190, © 2014 WIT Press
doi:10.2495/EQ140601
are presented. Furthermore some recommendations for technical solutions to
decrease mechanical losses in the investigated system are given.
Keywords: tribosystem, contact interface, friction energy, mechanical losses.
Keywords
tribosystem, contact interface, friction energy, mechanical losses.
Related Book
Other papers in this volume
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