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TECHNICAL PAPERS

Thermal and Dynamic Characterization of Wet Clutch Engagement With Provision for Drive Torque

[+] Author and Article Information
M. Mansouri

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803

M. Holgerson

Division of Machine Elements, Lulea University of Technology, SE-971 87 Lulea, Sweden

M. M. Khonsari

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803e-mail: khonsari@me.Isu.edu

W. Aung

College of Engineering, Southern Illinois University, Carbondale, IL 62901

J. Tribol 123(2), 313-323 (Jun 16, 2000) (11 pages) doi:10.1115/1.1329856 History: Received January 11, 2000; Revised June 16, 2000
Copyright © 2001 by ASME
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References

Evans,  M., and Whittle,  J., 1967, “Friction in Wet Clutches,” Proc. Inst. Mech. Eng.,182, Part 3N, pp. 132–138.
Förster,  H. J., 1977, “Tribological Problems in Automatic Transmissions,” Proc. Inst. Mech. Eng., C35/77, pp. 43–54.
Holgerson, M., and Lundberg, J., 1999, “Engagement Behavior of a Paper-Based Wet Clutch: Part 1—Influence of Drive Torque,” Proc. Inst. Mech. Eng., Part D (J. Automob. Eng), 213 , in press.
Holgerson,  M., 1997, “Apparatus for Measurement of Engagement Characteristics of a Wet Clutch,” Wear, 213, p. 140.
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El-Sherbiny,  M., and Newcomb,  T. P., 1977, “Numerical Simulation of the Engagement Characteristics of a Wet Clutch,” Proc. Inst. Mech. Eng., C63, pp. 81–92.
Zagrodzki,  P., 1985, “Numerical Analysis of Temperature Fields and Thermal Stresses in the Friction Discs of a Multidisc Wet Clutch,” Wear, 101, pp. 255–271.
Zagrodzki,  P., 1990, “Analysis of Thermomechanical Phenomena in Multidisc Clutches and Brakes,” Wear, 140, pp. 291–308.
Zagrodzki,  P., 1991, “Influence of Design and Material Factors on Thermal Stresses in Multiple Disc Wet Clutches and Brakes,” SAE Trans., 100n, Sect. 2, pp. 395–405.
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Yang, Y., Lam, R. C., Chen, Y. F., and Yabe, H., 1995, “Modeling of Heat Transfer and Fluid Hydrodynamics for a Multidisc Wet Clutch,” SAE Technical Paper Series, No. 950898.
Yang, Y., Lam, R. C., and Fujii, T., 1998, “Prediction of Torque Response During the Engagement of Wet Friction Clutch,” SAE Technical Paper Series, No. 981097.
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Berger, E. J., Sadeghi, F., and Krousgrill, C. M., 1996, “Analytic and Numerical Modeling of Engagement of Rough, Permeable, Grooved Wet Clutches,” STLE Preprint No. 96-TRIB-3.
Jang,  J. Y., and Khonsari,  M. M., 1999, “Thermal Characteristics of a Wet Clutch,” ASME J. Tribol., 121, pp. 610–618.
Haviland, M. L., Rodgers, J. J., and Davison, E. D., 1963, “Surface Temperatures and Friction in Lubricated Clutches,” SAE Technical Paper 642B.
Anderson, A. E., 1972, “Friction and Wear of Paper Type Wet Friction Elements,” SAE Technical Paper 720521.
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Figures

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Schematic drawing of the wet clutch test rig
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A sketch of the geometry and dimensions of the thermal model of the test rig
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FE mesh pattern used in simulations: details near sliding interface; total mesh has 7542 nodes, and 3647 finite elements
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Friction Coefficient: comparison of the experimental and simulated models (□ Experimental: Low Energy, Long Engagement Time; ▪ Experimental: Low Energy, Long Engagement Time; • Experimental: High Energy, Short Engagement Time; ○ Experimental: High Energy, Short Engagement Time, with drive torque; –Simulated)
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Experimental and simulated brake torque, simulated drive torque: High energy, long time engagement
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Comparison of the experimental and simulated sliding velocities for two engagements with similar duration
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Comparison of experimental and simulated developed power, for two engagements with similar energy expenditure
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Comparison of the experimental and simulated temperatures at the sliding interface, for two engagements with similar duration
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Comparison of the experimental and simulated temperatures at the sliding interface, for two engagements with similar energy expenditure
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Comparison of the experimental and simulated temperatures at the sliding interface, for an engagement with active drive torque
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Simulated temperatures at selected interfaces. Notice the temperature drop across the ITCR-layer.

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