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Influence of Engine Oil Viscosity on Piston Ring and Cam Face Wear
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Abstract
The influence of engine oil viscosity on the wear of piston rings and cam faces has been investigated by fired engine tests using a radioisotope (RI) tracer technique. High-temperature and high-shear-rate (HTHS; 150°C, 1O6 s-1) viscosities of the experimental oils prepared are 2.2, 2.4, 2.6 and 3.1 mPa•s. At an oil temperature of 90°C the wear of piston rings and cam faces did not increase, even if the HTHS viscosity was lowered down to 2.2 mPa•s. However, both piston rings and cam faces exhibited an increase in wear below 2.4 mPa•s at 130°C. It was also recognized that valve train wear did not significantly increase with reducing viscosity in the motored engine tests at a temperature of 50°C. From these test results, it was suggested that the oil with the HTHS viscosity of 2.6 mPa•s sufficiently demonstrates the antiwear performance equivalent to that with around 3.0 mPa•s for application to piston rings and cam faces.
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Ohmori, T., Tohyama, M., Yamamoto, M., Akiyama, K. et al., "Influence of Engine Oil Viscosity on Piston Ring and Cam Face Wear," SAE Technical Paper 932782, 1993, https://doi.org/10.4271/932782.Also In
Tribological Insights and Performance Characteristics of Modern Engine Lubricants
Number: SP-0996; Published: 1993-10-01
Number: SP-0996; Published: 1993-10-01
References
- Bell J. C. Voisey M. A. “Some Relationships Between the Viscometric Properties of Motor Oils and Performance in European Engines” SAE Paper 770378
- Goodwin M. C. Javiland M. L. “Fuel Economy lmprovements in ERP and Road Tests with Engine Oil and Rear Axle Lubricant Viscosity Reduction” SAE Paper 780596
- Ghirla P. J. Smith R. K. “Automotive Engine Friction and Fuel Efficiency - Viscous Versus Non-Viscous Effects” SAE Paper 780984
- Hamaguchi H. Maeda Y. Maeda T. “Fuel Efficient Motor Oil for Japanese Passenger Cars” SAE Paper 810316
- Wall J. C. “Influence of Crankcase Lubricant Viscosity on Fuel Consumption in a Medium-Speed Diesel Engine” SAE Paper 821148
- Clevenger J. E. Carlson D. C. Kleiser W. M. “The Effects of Engine Oil Viscosity and Composition on Fuel Efficiency” SAE Paper 841389
- Hanada K. Nakamura K. Matsumoto E. Shinohara T. “A Study of Low-Viscosity Oil from the Standpoint of Fuel Consumption, Oil Volatility and Engine Wear” Proc. JSAE Autumn Convention 892099
- Bates T. W. Toft G. B. “Oil Rheology and Journal Bearing Performance: A Review” Lub. Sci. 2 2 1990 157
- Broman V. E. DeJovine J. DeVries D. L. Keller G. H. “Testing of Friction Modified Crankcase Oils for lmproved Fuel Economy” SAE Paper 780597
- Waddey W. E. Shaub H. Pecoraro J. M. Carley R. A. “Improved Fuel Economy Via Engine Oils” SAE Paper 780599
- Passut C. A. Kollmn R. E. “Laboratory Techniques for Evaluation of Engine Oil Effects on Fuel Economy” SAE Paper 780601
- Haviland M. L. Goodwin M. C. “Fuel Economy Improvements with Friction-Modified Engine Oils in Environmental Protection Agency and Road Tests” SAE Paper 790945
- Greene A. B. Risdon T. J. “The Effect of Molybdenum-Containing, Oil-Soluble Friction Modifiers on Engine Fuel Economy and Gear Oil Efficiency” SAE Paper 811187
- Kennedy S. Moore L. D. “Additive Effects on Lubricant Fuel Economy” SAE Paper 872121
- Kovach J. T. Tsakiris E. A. Wong L. T. “Engine Friction Reduction for lmproved Fuel Economy” SAE Paper 820085
- Hoshi M. “Reducing Friction Losses in Automobile Engines” Tribol. Int. 17 4 1984 185
- Griffiths D. W. Smith D. J. “The Importance of Friction Modifiers in the Formulation of Fuel Efficient Engine Oils” SAE Paper 852112
- Lewis E. J. “Lubricants for High Performance Automobiles” Proc. Japan ITC Nagoya 1990 1353
- Stambaugh R. L. Kopko R. J. Bennett P. A. “The Relationship of Journal Bearing Wear to Multigrade Engine Oil Viscometric Properties” SAE Paper 770627
- Lonstrup T. F. Smith, M. F. Jr. “Engine Oil and Bearing Wear” SAE Paper 810330
- Yamaguchi Y. Takesue M. Maruya T. Nagashima T. “Experimental Analysis of Connecting Rod Bearing Seizures in Four-Cycle Gasoline Engines” SAE Paper 892114
- Bates T. W. Toft G. B. “Wear in Main and Connecting-Rod Big-End Bearings: Effects of Lubricant Viscosity and Bearing Oil Film Thickness” Proc. Japan ITC Nagoya 1990 2005
- Demmin R. A. Girshick F. Schilowitz A. M. “Engine Oil Viscosity and Bearing Wear: Field Test Results” SAE Paper 922342
- Evans R. “Radioisotope Methods for Measuring Engine Wear: A Thin Layer Activation Method for the Measurement of Cam Follower Wear and Its Comparison with a Neutron Activation Method” Wear 64 1980 311
- Milder F. L. Armini A. J. Jones G. W. “The Use of Surface Layer Activation Wear Monitoring for Filter Design and Evaluation” SAE Paper 810329
- Conlon T. W. “Thin Layer Activation for Materials Analysis” Ind. Lubr. Tribol. 34 1982 20
- Blatchley C. C. Sioshansi P. “Measuring Engine Wear by Surface Layer Activation: Extension to Nanometer Increments” SAE Paper 872155
- Schneider E. W. Blossfeld D. H. Balnaves M. A. “Effect of Speed and Power Output on Piston Ring Wear in a Diesel Engine” SAE Paper 880672
- Kikuchi T. Akiyama K. Tasaka K. “Effect of Future Engine Oils on Valve-Train Wear” Proc. JSAE Autumn Convention 924063