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TECHNICAL PAPERS—SPECIAL ICE SECTION: Engine Design

Predicted Effects of Cylinder Kit Wear on Blowby and Oil Consumption for Two Diesel Engines

[+] Author and Article Information
D. E. Richardson

Cylinder Systems Development, Cummins Engine Company, Charleston, SC 29405e-mail: dan.e.richardson@cummins.com

S. A. Krause

Federal-Mogul Power Train Systemse-mail: steven_krause@fmo.com

J. Eng. Gas Turbines Power 122(4), 520-525 (Nov 22, 1999) (6 pages) doi:10.1115/1.1286674 History: Received November 02, 1998; Revised November 22, 1999
Copyright © 2000 by ASME
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References

Mayer, J. E., 1974, “Piston Ring Lubrication and Cylinder Bore Wear Analysis, Part I—Theory,” J. Lubr. Technol., pp. 305–314.
Namazian, M., and Heywood, J. B., 1982, “Flow in the Piston-Cylinder-Ring Crevices of a Spark-Ignition Engine: Effect on Hydrocarbon Emissions, Efficiency and Power,” SAE Paper 820088.
Kuo, T., et al., 1989, “Calculation of Flow in the Piston-Cylinder-Ring Crevices of a Homogeneous-Charge Engine and Comparison with Experiment,” SAE Paper 890838.
Keribar, R., Dursunkaya, Z., and Flemming, M. F., 1991, “An Integrated Model of Ring Pack Performance,” ASME J. Eng. Gas Turbines Power, pp. 382–389.
Richardson, D. E., 1996, “Comparison of Measured and Theoretical Inter-Ring Gas Pressure on a Diesel Engine,” SAE Paper 961909.

Figures

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Diesel engine No. 1 linear wear used in model (width constant)
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Diesel engine No. 1 linear wear used in model (width increasing)
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Diesel engine No. 2 linear wear used in model (width constant)
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Diesel engine No. 2 linear wear used in model (width increasing)
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Increase in ring end gap because of the worn liner (diesel engine No. 1, Ref. Fig. 2, 150 micron wear depth)
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Schematic of unworn and worn top ring face profiles
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Predicted inter-ring gas pressure-diesel engine No. 1 engine (mode 1=low wear,mode 2=high wear)
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Predicted top ring motion-diesel engine No. 1 engine (mode 1=low wear,mode 2=high wear)
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Predicted effect of wear on blowby-diesel engine No. 1 engine (1800 rpm, full load, single factor effect)
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Predicted effect of wear on blowback-diesel engine No. 1 engine (gas flow from the second land to the combustion chamber)
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Predicted oil film thickness under the top ring-diesel engine No. 1 engine (unworn ring versus worn ring—150 microns wear)
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Predicted increases in blowby and oil consumption with linear wear (experimental and predicted)
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Predicted inter-ring gas pressure-diesel engine No. 2 engine
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Predicted ring motion-diesel engine No. 2 engine
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Predicted effect of wear on blow by-diesel engine No. 2 engine (1800 rpm, full load, single factor effect)
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Predicted oil film thickness under the top ring-diesel engine No. 2 engine (unworn ring versus worn ring—150 microns wear)
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Simple schematic of radial pressure forces acting on the ring face

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