An analysis procedure, using the time-frequency distribution, has been developed for the analysis of internal combustion engine noise signals. It provides an approach making use of advantages of both the linear time-frequency distribution and the bilinear time-frequency distribution but avoiding their disadvantages. In order to identify requirements on the time-frequency analysis and also correlate a time-frequency analysis result with noise sources, the composition of the noise signal is discussed first. With this discussion, a mathematical model has been suggested for the noise signal. An example of identifying noise sources and detecting the abnormal condition of an injector with the noise signal time-frequency distribution for a diesel engine is also provided.

Issue Section:
Internal Combustion Engines
Keywords:
internal combustion engines, noise, transients, modelling, signal processing, time-frequency analysis
Topics:
Internal combustion engines, Noise (Sound), Signals, Signal processing, Engines, Transients (Dynamics)
1.
Chui, C. K., 1992, An Introduction to Wavelets, Volume 1: Wavelet Analysis and Its Applications, Academic Press, San Diego, CA.
2.
Cohen
,
L.
1989
, “
Time-Frequency Distributions—A Review
,”
Proc. IEEE
,
77
, No.
7
, pp.
941
–
981
.
3.
Atlas
,
L.
, and
Duhamel
,
P.
eds.,
1999
, “
Recent Developments in the Core of Digital Signal Processing
,”
IEEE Signal Process. Mag.
,
16
, No.
2
, pp.
16
–
31
.
4.
Zheng, G. T., and McFadden, P. D., 1994, “Windowed Fourier Transform of Mechanical Vibration Signals,” Technical Report of Oxford University, Report No. OUEL 2036/94.
5.
Zheng, G. T., and McFadden, P. D., 1996, “A Time-Frequency Distribution for Analysis of Signals With Transient Components and Its Application to Early Gear Failure Detection,” Report OUEL 2088/96, Department of Engineering Science, University of Oxford, Oxford, UK.
6.
Azzoni, P., Moro, D., and Rizzoni, G., 1998, “Time-Frequency Signal Analysis of the Acoustic Emission of Formula 1 Engines,” Proceedings of the IEEE SP International Symposium on Time-Frequency and Time-Scale Analysis, IEEE, Piscataway, NJ, pp. 441–444.
7.
Mossing, J. C., and Tuthill, T. A., 1996, “Reduced Interference Distributions for the Detection and Classification of Outside Sound Source Acoustic Emissions,” Proceedings of 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol. 5, IEEE, Piscataway, NJ, pp. 2758–2761.
8.
Samimy
,
B.
and
Rizzoni
,
G.
1996
, “
Mechanical Signature Analysis Using Time-Frequency Signal Processing: Application to Internal Combustion Engine Knock Detection
,”
Proc. IEEE
,
84
, No.
9
, pp.
1330
–
1343
.
9.
Lee
,
S. K.
, and
White
,
P. R.
,
1998
, “
The Enhancement of Impulsive Noise and Vibration Signals for Fault Detection in Rotating and Reciprocating Machinery
,”
J. Sound Vib.
,
217
, No.
3
, pp.
485
–
505
.
10.
Gu
,
F.
, and
Ball
,
A. D.
,
1996
, “
Diesel Injector Dynamic Modelling and Estimation of Injection Parameters From Impact Response, Part 1: Modelling and Analysis of Injector Impacts
,”
Proc. Inst. Mech. Eng., Part D (J. Automob. Eng.)
,
210
, pp.
293
–
302
.
11.
Gu
,
F.
, and
Ball
,
A. D.
,
1996
, “
Diesel Injector Dynamic Modelling and Estimation of Injection Parameters From Impact Response, Part 2: Prediction of Injection Parameters From Monitored Vibration
,”
Proc. Inst. Mech. Eng., Part D (J. Automob. Eng.)
,
210
, pp.
303
–
312
.
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