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TECHNICAL PAPERS

Approximating EHL Film Thickness Profiles Under Transient Conditions

[+] Author and Article Information
S. Messé

P.S.A. Peugeot Citroën, La Garenne Colombes, France

A. A. Lubrecht

INSA de Lyon, Laboratoire de Mcanique des Contacts, UMR CNRS 5514 France

J. Tribol 124(3), 443-447 (May 31, 2002) (5 pages) doi:10.1115/1.1454105 History: Received November 17, 2000; Revised July 24, 2001; Online May 31, 2002
Copyright © 2002 by ASME
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References

Dowson, D., and Higginson, G. R., 1966, Elasto-Hydrodynamic Lubrication, SI, Oxford, Pergamon Press Ltd, p. 236.
Hamrock,  B. J., and Dowson,  D., 1976, “Isothermal EHD Lubrication of Points Contacts: Part I—Theoretical Formulation,” ASME J. Lubr. Technol., 98, No. 2, pp. 223–229.
Hooke,  C. J., 1992, “The Minimum Film Thickness in Lubricated Line Contacts During a Reversal of Entrainment Isoviscous Behavior,” Proceeding of the ImechE, 206, Part J, pp. 337–345.
Hooke,  C. J., 1993, “The Minimum Film Thickness in Line Contacts during a Reversal of Entrainment,” ASME J. Tribol., 115, pp. 191–199.
Sugimura,  J., Okumura,  T., Yamamoto,  Y., and Spikes,  H. A., 1999, “Simple Equation for Elastohydrodynamic Film Thickness Under Acceleration,” Transaction of Tribology International, 32, pp. 117–123.
Kaneta, M., 1999, “For the Establishment of a New EHL Theory,” Proceeding of the Leeds-Lyon Symposium on Tribology, Lubrication at the Frontier, 36 , pp. 25–36.
Glovnea, R. P., and Spikes, H. A., 2001, “The Influence of Cam-Follower Motion on Elastohydrodynamic Film Thickness,” Proceeding of the Leeds-Lyon Symposium on Tribology 2001, Vol. 39, pp. 485–493.
Dowson,  D., Taylor,  C. M., and Zhu,  G., 1992, “A Transient Elastohydrodynamic Lubrication Analysis of a Cam and Follower,” J. Appl. Phys., 25, pp. 313–320.
Ai,  X., and Haiqing,  Y., 1989, “A Numerical Analysis for the Transient EHL Process of a Cam-Tappet Pair in I.C. Engine,” ASME J. Tribol., 111, pp. 413–417.
Glovnea,  R. P., and Spikes,  H. A., 2000, “Elastohydrodynamic Film Collapse During Rapid Deceleration. Part I: Experimental Results,” ASME J. Tribol., 123, No. 2, pp. 254–261.
Glovnea,  R. P., and Spikes,  H. A., 2000, “Elastohydrodynamic Film Collapse During Rapid Deceleration. Part II: Theoretical Analysis and Comparison of Theory and Experiment,” ASME J. Tribol., 123, No. 2, pp. 262–267.
Messé, S., and Lubrecht, A. A., 2000, “Transient Elastohydrodynamic Analysis of an OHC cam/Tappet Contact,” Proceeding of the IMechE: Journal of Engineering Tribology, 214 , pp. 415–425.
Venner,  C. H., and Lubrecht,  A. A., 2000, “Multilevel Methods in Lubrication,” Tribol. Ser., 37, Elsevier.
Messé, S., 2001, “Analyse Transitoire de la Lubrification et du Frottement dans un Système de Distribution Automobile,” Ph.D. thesis, INSA de Lyon, France.

Figures

Grahic Jump Location
Superposition of dimensionless film thickness profiles for different Moes parameters M et L, at U(t=U0/a)=0
Grahic Jump Location
Variation of entrainment speed as a function of time and resulting film thickness profile
Grahic Jump Location
Variation of entrainment speed as a function of time and resulting film thickness profile
Grahic Jump Location
Comparison of numerical film thickness results with approximate formula for λ=1/2
Grahic Jump Location
Variation of entrainment speed with a zero entrainment point
Grahic Jump Location
Evolution of the film thickness according to Eq. 18: (a) t=0; (b) t≥0; (c) t=σ; (d) t=1/2(σ12); (e) t=σ2j and (f ) t>σ2.

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