A bench friction test system for piston ring and liner contact, which has high stroke length and large contact width has been used to verify the analytical mixed lubrication model presented in a companion paper (Part 1). This test system controls the speed, temperature and lubricant amount and records the friction force, loading force, crank angle signal and contact temperature data simultaneously. The effects of running speed, applied normal load, contact temperature and surface roughness on friction coefficient have been investigated for conventional cast-iron cylinder bores. Friction coefficient predictions are presented as a function of crank angle position and results are compared with bench test data. Analytical results correlated well with bench test results.

Issue Section:
Technical Papers
Keywords:
lubrication, internal combustion engines, sliding friction, mechanical testing
Topics:
Cylinders, Friction, Lubrication, Stress, Lubricants, Temperature, Pistons, Surface roughness
1.
Slone, R., Patterson, D. J., Morrison, K. M., and Schwatz, G. B., 1989, “Wear of Piston Rings and Liners by Laboratory Simulation,” SAE Paper 890146.
2.
Ting, L. L., 1993, “Development of a Reciprocating Test Rig for Tribological Studies of Piston Engine Moving Components: Part 1—Rig Design and Piston Ring Friction Coefficients Measuring Method,” SAE Paper 930685.
3.
Ting, L. L., 1993, “Development of a Reciprocating Test Rig for Tribological Studies of Piston Engine Moving Components: Part 2—Measurements of Piston Ring Friction Coefficients and Rig Test Confirmation,” SAE Paper 930686.
4.
Ting, L. L., 1995, “Friction and Scuffing Resistance Characteristics of Piston Materials as Investigated by a Reciprocating Test Rig,” SAE Paper 951042.
5.
Hartfield-Wunsch, S. E., Tung, S. C., and Rivald, C. J., 1993, “Development of a Bench Test for the Evaluation of Engine Cylinder Components and Correlation with Engine Test Results,” SAE Paper 932693.
6.
Hartfield-Wunsch, S. E., and Tung, S. C., 1994, “The Effect of Microstructure on the Wear Behavior of Thermal Spray Coatings,” Proceedings of the 7th National Thermal Spray Conference, Boston, MA.
7.
Dearlove, J., and Cheng, W. K., 1995, “Simultaneous Piston Ring Friction and Oil Film Thickness Measurements in a Reciprocating Test Rig,” SAE Paper 952470.
8.
Arcoumanis, C., Duszynski, M., Flora, H., and Ostovar, P., 1995, “Development of a Piston-Ring Lubrication Test-Rig and Investigation of Boundary Conditions for Modeling Lubrication Film Properties,” SAE Paper 952468.
9.
Rao, V. D. N., Cikanek, H. A., Boyer, B. A., Lesnevsky, L. N., Tchernovsky, N. M., and Tjurin, N. V., 1997, “Friction and Wear Characteristics of Micro-Arc Oxidation Coating for Light Weight, Wear Resistant Powertrain Application,” SAE Paper 970022.
10.
Rao, V. D. N., Kabat, D. M., Cikanek, H. A., Fucinari, C. A., and Wuest, G., 1997, “Material Systems for Cylinder Bore Applications—Plasma Spray Technology,” SAE Paper 970023.
11.
Akalin, O., and Newaz, G. M., 1998, “A New Experimental Technique for Friction Simulation in Automotive Piston Ring and Cylinder Liners,” SAE Paper 981407.
Copyright © 2001
 by ASME
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