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Combustion Analysis of a CI Engine with Biodiesel Blends based on Vibro-Acoustic Measurement

Zhen, Dong, Wang, T., Gu, Fengshou, Tran, Van Tung and Ball, Andrew (2012) Combustion Analysis of a CI Engine with Biodiesel Blends based on Vibro-Acoustic Measurement. In: CM 2012 and MFPT 2012: The Ninth International Conference on Condition Monitoring and Machinery Failure Prevention Technologies , 12th - 14th June 2012, London, UK. (Unpublished)

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Abstract

In this paper, a combustion analysis of a compression ignition (CI) engine operating with biodiesel blends has been experimentally investigated to examine the effects of biodiesel on the combustion process and the characteristics of the engine noise produced by the combustion process. The experiment with different loads and speeds was conducted on a four-cylinder, four-stroke, direct injection and turbocharged diesel engine fuelled with biodiesel (B50 and B100) and normal pure diesel. The signals of vibration, acoustic and the in-cylinder pressure were measured for analysing the engine combustion. In order to examine these signals, a coherent power spectrum analysis method is used to investigate the engine noise signals for locating the frequency band which is closely related to the combustion process. Subsequently, the Wigner-Ville distribution is employed to analyse the energy distribution of engine noise in the time-frequency domain. A band-pass filter based on fractional Fourier transform is developed to extract the main combustion induced noise from the engine noise for comparison. The interim results show that the sound energy level of combustion noise of engine fuelled by biodiesel and its blends is higher than that of engine fuelled by diesel. This is also identical to the variation of in-cylinder pressure. Hence, acoustic signals of the CI engine provide useful features for remote engine condition monitoring and supply fuel monitoring.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TJ Mechanical engineering and machinery
Schools: School of Computing and Engineering
School of Computing and Engineering > Automotive Engineering Research Group
School of Computing and Engineering > Diagnostic Engineering Research Centre
School of Computing and Engineering > Diagnostic Engineering Research Centre > Energy, Emissions and the Environment Research Group
School of Computing and Engineering > Diagnostic Engineering Research Centre > Machinery Condition and Performance Monitoring Research Group
School of Computing and Engineering > Diagnostic Engineering Research Centre > Measurement System and Signal Processing Research Group
School of Computing and Engineering > High-Performance Intelligent Computing
School of Computing and Engineering > High-Performance Intelligent Computing > Information and Systems Engineering Group
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Depositing User: Cherry Edmunds
Date Deposited: 11 Jul 2012 11:29
Last Modified: 11 Jul 2012 11:29
URI: http://eprints.hud.ac.uk/id/eprint/14200

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