Methodology of fault detection in internal combustion engines through the analysis of rolling block oscillation
by V. Macian, A. Broatch, B. Tormos, P. Olmeda
International Journal of Heavy Vehicle Systems (IJHVS), Vol. 16, No. 3, 2009

Abstract: This paper presents a non-intrusive fault detection technique, based on the analysis of rolling block oscillations, assuming that the engine behaves as a rigid body mounted on elastic supports. Engine diagnosis is feasible with a single accelerometer, which constitutes an attractive procedure for maintenance engineers. The proposed method is illustrated with modelled and measured results obtained with two different automotive engines. The engine diagnosis is performed using a particular normalisation of the Fast Fourier Transform. The procedure leads to identify multiple sub-harmonics of the firing frequency which allow a reliable diagnosis.

Online publication date: Wed, 15-Jul-2009

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