55. Estimation of engine piston system wear using time‑frequency method

Marek Flekiewicz1, Paweł Fabiś2, Rafał Burdzik3

Silesian University of Technology, Department of Automotive Vehicle Construction, Gliwice, Poland

1Corresponding author

E-mail: 1marek.flekiewicz@polsl.pl, 2pawel.fabis@polsl.pl, 3rafal.burdzik@polsl.pl

(Received 20 August 2014; received in revised form 8 September 2014; accepted 11 September 2014)

Abstract. The paper presents the fault diagnosis technique for internal combustion engines using time-frequency representations of vibration signal. Engine block vibration results as a sum of many excitations mainly connected with engine speed and their intensity increases with the appearance of a fault or in case of higher engine elements wearing. In this paper an application of acceleration signals for the estimation of the influence of piston skirt clearance on diesel engine block vibrations has been described. Engine body accelerations registered for three simulated cases representing piston skirt clearance variations were an object of preliminary analysis. The presented procedures were applied to vibration and pressure signals acquired for a 0.5 dm3 Ruggerini, air cooled diesel engine. Reciprocating machines are difficult to diagnose using traditional frequency domain techniques because of generate transient vibration. In conducted experiments wavelet transform has been chosen.

Keywords: piston slap, engine diagnostic, vibroacoustic diagnosis.


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Cite this article

Flekiewicz Marek, Fabiś Paweł, Burdzik Rafał Estimation of engine piston system wear using time-frequency method. Journal of Measurements in Engineering, Vol. 2, Issue 3, 2014, p. 159‑163.


Journal of Measurements in Engineering. September 2014, Volume 2, Issue 3
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