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Modelling and diagnosis of big-end bearing knock fault in internal combustion engines

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journal contribution
posted on 11.06.2020, 09:17 by J Chen, R Randall, N Feng, B Peeters, H Van der Auweraer

Big-end bearing knock is considered to be one of the common mechanical faults in internal combustion engines (IC engines). In this paper, a model has been built to simulate the effects of oversized clearance in the big-end bearing of an engine. In order to find a relationship between the acceleration response signal and the oversized clearance, the kinematic/kinetic and lubrication characteristics of the big ending bearing were studied. By adjusting the clearance, the impact forces with different levels of bearing knock fault can be simulated. The acceleration on the surface of the engine block was calculated by multiplying the simulated force spectrum by an experimentally measured frequency response function (FRF) in the frequency domain (and then inverse transforming to the time domain). As for experimentally measured vibration signals from bearing knock faults, the signal processing approach used involved calculating the squared envelopes of the simulated acceleration signals. The comparison to the experimental results demonstrated that the simulation model can correctly simulate vibration signals with different stages of bearing knock faults.

Funding

This research was funded by the Australian Research Council and LMS International under Linkage Project LP0883486.

History

Citation

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2014, 228 (16), pp. 2973-2984

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Version

AM (Accepted Manuscript)

Published in

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science

Volume

228

Issue

16

Pagination

2973-2984

Publisher

SAGE Publications (UK and US), Professional Engineering Publishing (Institution of Mechanical Engineers)

issn

0954-4062

eissn

2041-2983

Acceptance date

14/01/2014

Copyright date

2014

Language

en

Publisher version

https://journals.sagepub.com/doi/10.1177/0954406214524743