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The Condition Monitoring of Diesel Engines Using Acoustic Measurements Part 2: Fault Detection and Diagnosis
Technical Paper
2000-01-0368
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2000 World Congress
Language:
English
Abstract
In this paper, the focus is upon the condition monitoring implications of acoustic monitoring. Namely, its ability to detect, diagnose and locate incipient deterioration in a number of common failure modes. To improve the reliability of the condition monitoring procedures, the noise contaminated signals are conditioned based upon the results of speed and load dependency investigation of the identified low and high frequency regions of sound. High pass filtering is shown to eliminate much of the environmental dependency of the monitored signals, whilst retaining the pertinent condition indicating information content. Real fault testing shows that the location of different faults, their influences upon combustion, and the ability to distinguish between them can all be extracted from the shape of the contours in the Continuous Wavelet Transform (CWT).
The sister paper to this (“Part 1 - Acoustic Characteristics of the Engine and Representation of the Acoustic Signals”), the sound generation of a diesel engine is modelled based upon the combustion process. Real monitored data is shown to be highly contaminated, and the representation of acoustic signals using the smoothed pseudo-Wigner-Ville distribution (SPWVD) and continuous wavelet transform (CWT), however, is found to permit recognition of the adverse influences of the measurement environment.
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Citation
Ball, A., Gu, F., and Li, W., "The Condition Monitoring of Diesel Engines Using Acoustic Measurements Part 2: Fault Detection and Diagnosis," SAE Technical Paper 2000-01-0368, 2000, https://doi.org/10.4271/2000-01-0368.Also In
Electronic Engine Controls 2000: Modeling, Neural Networks, Obd, and Sensors
Number: SP-1501; Published: 2000-03-06
Number: SP-1501; Published: 2000-03-06
References
- Reynolds D.D. “Engineering Principles of Acoustics” Allyn and Bacon Inc. 1981
- Gu F. Ball A. D. Rao, K. K. 1996 “Diesel Injector Dynamic Modelling and Estimation of Injection Parameters from Impact Response - Part II: Prediction of Injection Parameters from Monitored Vibration” Proc. of I.Mech.E. Part D - Journal of Automobile Engineering 210 303 311 1996
- Schmillen K. Wolschendorf J. “Cycle-to-Cycle Variation of Combustion Noise in Diesel Engines” SAE Paper 890129 60 69 1989
- Randoph A.L. “Cylinder Pressure Based Combustion Analysis in Race Engines” SAE Paper 942487 59 73 1994
- Gu F. Jacob P. J. Ball A. D. “Non-parametric Models in the Monitoring of Engine Performance and Condition - Part 2: Non-intrusive Estimation of Diesel Engine Cylinder Pressure and its use in Fault Detection” proceedings of the I.Mech.E. Part D - Journal of Automobile Engineering 1998