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TECHNICAL PAPERS

Piston Ring-Cylinder Bore Friction Modeling in Mixed Lubrication Regime: Part I—Analytical Results

[+] Author and Article Information
Ozgen Akalin, Golam M. Newaz

Wayne State University, Department of Mechanical Engineering, Detroit, MI 48202

J. Tribol 123(1), 211-218 (Dec 29, 1999) (8 pages) doi:10.1115/1.1286337 History: Received October 22, 1998; Revised December 29, 1999
Copyright © 2001 by ASME
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References

Figures

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Film thickness function
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Piston ring boundary conditions
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Approximation of the ring face profile
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Cylinder gas pressure and the pressure between first and second compression ring
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Predicted oil pressure distribution for the simulated actual engine conditions. Cast-iron cylinder bore, 700 rpm, 70°C average oil temperature.
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Predicted asperity contact pressure distribution for the simulated actual engine conditions. Cast-iron cylinder bore, 700 rpm, 70°C average oil temperature.
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(a) Film thickness; (b) load carried by surface asperities; (c) load carried by oil film thickness; and (d) cavitation location as a function of crank angle degree
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Predicted total friction force and friction force due to asperity contact as a function of crank angle position. Cast-iron cylinder bore, 700 rpm, 70°C average oil temperature.
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Motoring and firing piston ring assembly friction measurements using Instantaneous IMEP method. 500 rpm, 5.0 Liter Engine, 65.9 cm Hg MAP, 82°C oil and water temperatures (Uras and Patterson 42).

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