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TECHNICAL PAPERS: Internal Combustion Engines

Statistical Correlation Between the Crankshaft’s Speed Variation and Engine Performance—Part I: Theoretical Model

[+] Author and Article Information
D. Taraza

Mechanical Engineering Department, Wayne State University, 5050 Anthony Wayne Drive, Detroit, MI 48202

J. Eng. Gas Turbines Power 125(3), 791-796 (Aug 15, 2003) (6 pages) doi:10.1115/1.1563244 History: Received September 01, 2001; Revised July 01, 2002; Online August 15, 2003
Copyright © 2003 by ASME
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References

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Garshelis, I. J., Aleksonis, J. A., Jones, C. A., and Rotay, R. M., 1997, “Development of a Magnetoelastic Torque Transducer for Automotive Transmission Applications,” SAE Paper No. 970605.
Rizzoni, G., 1989, “Diagnosis of Individual Cylinder Misfires by Signature Analysis of Crankshaft Speed Fluctuations,” SAE Paper No. 89884.
Brown, T. S., and Neil, W. S., 1992, “Determination of Engine Cylinder Pressures From Crankshaft Speed Fluctuations,” SAE Paper No. 920463.
Citron S. J., O’Higgins, J. E., and Chen, L. Y., 1989, “Cylinder by Cylinder Engine Pressure and Pressure Torque Waveform Determination Utilizing Speed Fluctuation,” SAE Paper No. 890486.
Rizzoni,  G., 1989, “Estimate of Indicated Torque From Crankshaft Speed Fluctuations: A Model for the Dynamics of the I.C. Engine,” IEEE Trans. Veh. Technol., 38(3), pp. 168–179.
Chen, K. S., and Chen, S., 1993, “Engine Diagnostics by Dynamic Shaft Measurement: A Progress Report,” SAE Paper No. 932412.
Taraza, D., 1993, “Possibilities to Reconstruct Indicator Diagrams by Analysis of the Angular Motion of the Crankshaft,” SAE Paper No. 932414.
Champoussin, J. C., and Ginoux, S. 1997, “Engine Torque Determination by Crank Angle Measurements: State of the Art, Future Prospects,” SAE Paper No. 970532.
Guezenec, Y. G., and Gyan, Ph., 1999, “A Novel Approach to Real-Time Estimation of the Individual Cylinder Combustion Pressure for S.I. Engine Control,” SAE Paper No. 1999-01-0209.
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Williams, J., 1996, “An Overview of Misfiring Cylinder Engine Diagnostic Techniques Based on Crankshaft Angular Velocity Measurements,” SAE Paper No. 960039.
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Maass, H., and Klier, H., 1981, Kraefte, Momente und deren Ausgleich in der Verbrennungskraftmaschine, Springer, Wien.
Hafner, K. E., and Maass, H., 1985, Torsionsschwingungen in der Verbrennungskraftmaschine, Springer-Verlag, Wien.
Taraza, D., 1997, “A General Theory of V-Engines Balance as a Predictive Tool in Engine Design,” Proceedings of the Fall Technical Conference, ASME, New York, ICE-Vol. 29-1, pp. 29–37.
Ventsel, H., 1973, Théorie des Probabilités, Éditions Mir Moscou, Moscow.
Taraza,  D., 2000, “A Probabilistic Approach to Engine Balance,” ASME J. Eng. Gas Turbines Power, 122, pp. 526–532.
Taraza, D., 2000, “Statistical Correlation Between the Crankshaft’s Speed Variation and the Contribution of Individual Cylinders to the Total Engine Output,” Proceedings of the Fall Technical Conference, ASME, New York, ICE-Vol. 35-3, pp. 81–93.

Figures

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Phase angle diagrams of the lower harmonic components of the gas pressure torque; four-stroke six-cylinder engine
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Statistical distribution of the random vector representing the kth harmonic component of the GPT for cylinder i
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The ellipse of dispersion for uniform contributions of all cylinders (k=1/2)
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Mean values and ellipses of dispersion for nonuniform cylinder operation
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The resultant of a major harmonic component of the engine torque
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The correlation between the amplitudes of the harmonic orders k=1/2 and k=3 of the tangential gas pressure and the MIP (measured values)
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Comparison between measured and generic data for the correlation TGP-MIP
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The correlation between the phases of the harmonic orders k=1/2 and k=3 of the tangential gas pressure and the MIP (measured values)

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