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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/13458

Title: Transient tribo-dynamics of thermo-elastic compliant high-performance piston skirts
Authors: Theodossiades, Stephanos
De la Cruz, Miguel
Littlefair, Bryn
Mills, R.
Howell-Smith, S.J.
Rahnejat, Homer
Dwyer-Joyce, R.S.
Issue Date: 2014
Publisher: Springer / © the authors
Citation: THEODOSSIADES, S. ... et al, 2014. Transient tribo-dynamics of thermo-elastic compliant high-performance piston skirts. Tribology Letters, 53 (1), pp. 51-70.
Abstract: Advanced piston technology for motorsport applications is driven through development of lightweight pistons with preferentially compliant short partial skirts. The preferential compliance is achieved through structural stiffening, such that a greater entrainment wedge is achieved at the skirt’s bottom edge through thermo-elastic deformation, whilst better conforming contact geometry at the top of the skirt. In practice, the combination of some of these conditions is intended to improve the load-carrying capacity and reduce friction. The approach is fundamental to the underlying ethos of race and high-performance engine technology. Contact loads of the order of 5 kN and contact kinematics in the range 0–35 m/s result in harsh transient tribological conditions. Therefore, piston design requires detailed transient analysis, which integrates piston dynamics, thermo-elastic distortion and transient elastohydrodynamics. The paper provides such a detailed analysis as well as verification of the same using non-invasive ultrasonic-assisted lubricant film thickness measurement from a fired engine under normal operating conditions, an approach not hitherto reported in literature. Good agreement is noted between measured film thickness and predictions.
Description: This is an Open Access Article. It is published by Springer under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) [grant number EP/G012334/1].
Version: Published
DOI: 10.1007/s11249-013-0243-6
URI: https://dspace.lboro.ac.uk/2134/13458
Publisher Link: http://dx.doi.org/10.1007/s11249-013-0243-6
ISSN: 1023-8883
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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