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Experimental Measurement and Theoretical Modeling of Internal Combustion Engine Valve Leakage by Acoustic Emission Method

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Proceedings of the 7th World Congress on Engineering Asset Management (WCEAM 2012)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

This paper presents an experimental study on the vibration signal patterns associated with a simulated piston slap test of a four-cylinder diesel engine. It is found that a simulated worn-off piston results in an increase in vibration RMS peak amplitudes associated with the major mechanical events of the corresponding cylinder (i.e., inlet and exhaust valve closing and combustion of Cylinder 1). This then led to an increase of overall vibration amplitude of the time-domain statistical features such as RMS, crest factor, skewness, and kurtosis in all loading conditions. The simulated worn-off piston not only increased the impact amplitude of piston slap during the engine combustion, but it also produced a distinct impulse response during the air induction stroke of the cylinder attributing to an increase of lateral impact force as a result of piston reciprocating motion and the increased clearance between the worn-off piston and the cylinder. The unique signal patterns of piston slap disclosed in this paper can be utilized to assist in the development of condition-monitoring tools for automated diagnosis of similar diesel engine faults in practical applications.

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Acknowledgments

This paper was financially supported by IRANKHODRO POWERTRAIN COOPERATION (IPCO). The authors gratefully acknowledge the IPCO engine laboratory researchers for their helps.

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Authors and Affiliations

  1. Sharif University of Technology, Azadi St, Tehran, Iran

    Seyed Mohammad Jafari, Hamid Mehdigholi & Mehdi Behzad

Authors
  1. Seyed Mohammad Jafari
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  2. Hamid Mehdigholi
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  3. Mehdi Behzad
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Corresponding author

Correspondence to Mehdi Behzad .

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Editors and Affiliations

  1. World Congress on Engineering Asset Management, Seoul, Korea, Republic of (South Korea)

    Woo Bang Lee

  2. World Congress on Engineering Asset Management, Gyeongnam, Korea, Republic of (South Korea)

    Byeongkuen Choi

  3. Queensland University of Technology, Graceville, Queensland, Australia

    Lin Ma

  4. Queensland University of Technology, Sunnybank Hills, Queensland, Australia

    Joseph Mathew

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Jafari, S.M., Mehdigholi, H., Behzad, M. (2015). Experimental Measurement and Theoretical Modeling of Internal Combustion Engine Valve Leakage by Acoustic Emission Method. In: Lee, W., Choi, B., Ma, L., Mathew, J. (eds) Proceedings of the 7th World Congress on Engineering Asset Management (WCEAM 2012). Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-06966-1_29

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  • DOI: https://doi.org/10.1007/978-3-319-06966-1_29

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-02461-5

  • Online ISBN: 978-3-319-06966-1

  • eBook Packages: EngineeringEngineering (R0)

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