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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/14223

Title: Effect of cylinder deactivation on the tribo-dynamics and acoustic emission of overlay big end bearings
Authors: Mohammadpour, Mahdi
Rahmani, Ramin
Rahnejat, Homer
Keywords: Elliptic bore big end bearings
Bearing dynamics
Thermo-mixed elastohydrodynamics
Acoustic emission
Issue Date: 2014
Publisher: Sage (© IMechE)
Citation: MOHAMMADPOUR, M., RAHMANI, R. and RAHNEJAT, H., 2014. Effect of cylinder deactivation on the tribo-dynamics and acoustic emission of overlay big end bearings. Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, DOI: 10.1177/1464419313519085, 14pp.
Abstract: The paper presents an integrated tribo-dynamics analysis of elliptic bore overlay big end bearings of internal combustion engines. The analysis focuses on bearing stability, frictional power loss and acoustic emission from these bearings, particularly with cylinder deactivation (CDA) with larger fluctuations in engine loading. The integrated approach represents a multi-physics analysis, not hitherto reported in literature, particularly under CDA. The analysis shows that CDA makes marginal differences in parasitic frictional losses in engine bearing performance and any significant gain would depend on the brake specific fuel consumption. It is also shown that sufficient swept volume with retained residual exhaust gas charge within the deactivated cylinders can ensure bearing whirl stability. Partially deactivated engine configurations exhibit a lower average steady noise emission, but with a higher degree of transient content. This suggests that there would be a greater contribution to engine rumble with deactivated cylinders.
Version: Accepted for publication
DOI: 10.1177/1464419313519085
URI: https://dspace.lboro.ac.uk/2134/14223
Publisher Link: http://dx.doi.org/10.1177/1464419313519085
ISSN: 1464-4193
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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