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TECHNICAL PAPERS—SPECIAL ICE SECTION: Engine Design

Review of Power Cylinder Friction for Diesel Engines

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

Cylinder Systems Development, Cummins Engine Company, Columbus, IN 47201

J. Eng. Gas Turbines Power 122(4), 506-519 (Apr 02, 2000) (14 pages) doi:10.1115/1.1290592 History: Received January 15, 1999; Revised April 02, 2000
Copyright © 2000 by ASME
Topics: Friction , Engines , Cylinders
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References

Figures

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Distribution of total energy in a fired engine
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Distribution of the total engine mechanical friction
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Distribution of piston/ring/rod friction
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Distribution of ring friction
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The effect of engine load on cylinder kit friction (Moveable Bore 32): (a) constant coolant water temperature; (b) constant cylinder temperature.
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The effect of engine load on cylinder kit friction (Moveable Bore 21)
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Motoring versus firing friction—500 rpm (Instantaneous IMEP 29)
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Motoring versus firing friction—1100 rpm (Instantaneous IMEP 29)
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Motoring versus firing friction—1640 rpm (Instantaneous IMEP 29)
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Motoring versus firing friction—1000 rpm (Fixed Sleeve 30)
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Pressurized motoring friction test at two different peak cylinder pressures (93 and 147 bar)
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Predicted instantaneous ring pack friction force (fired, motored, hot motored)
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Predicted instantaneous ring pack friction power loss (fired, motored, hot motored)
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Predicted average ring pack friction power loss (fired, motored, hot motored)
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Motoring friction and correlation for engine type 1
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Motoring friction and correlation for engine type 2
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Motoring friction and correlation for a DDC engine
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Schematic of the reduced cross-section ring that was modeled (dimensions are normalized)
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Predicted instantaneous friction force on top ring
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Predicted instantaneous power loss on top ring
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Top ring friction versus barrel drop (cycle averaged friction for six cylinders)
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Schematic of pressure forces acting on the top ring (1. large barrel drop, 2. small barrel drop, 3. skewed barrel)
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Radial gas pressure force acting on the top ring
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Effect of ring face profile on predicted instantaneous friction force of the top ring
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Effect of ring face profile on predicted instantaneous friction power loss of the top ring
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Effect of oil ring tension on friction for two cases

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