This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Anti-Wear Properties of Engine Oils-Effects of Oil Additives on Valve Train Wear
Annotation ability available
Sector:
Language:
English
Abstract
Special test methods under low temperature, low speed, and moderate temperature, moderate speed operating conditions were devised to evaluate the anti-wear properties of engine oils upon the engine valve train. Many commercial and some test oils were utilized to determine the factors affecting valve train wear.
Test results indicate that the low temperature and low speed test conditions were the more severe for the valve train. No simple correlation was found between the concentration of Zn-DTP and valve train wear, however, the influence of dispersant-detergent additives was found to be significant. The chemistry of such additives showed different tappet scuffing characteristics.
Recommended Content
Authors
Topic
Citation
Torii, K., Chida, H., Otsubo, K., and Tsusaka, Y., "Anti-Wear Properties of Engine Oils-Effects of Oil Additives on Valve Train Wear," SAE Technical Paper 770635, 1977, https://doi.org/10.4271/770635.Also In
References
- Pless Loren G. “Interactions Among Oil Additive and Engine Operating Parameters Affecting Engine Deposits and Wear” SAE Paper 720686 August 1972
- Rounds Fred G. “Some Factors Affecting the Decomposition of Three Commercial Zinc Organodithiophosphates” ASLE Transactions 18 2 1975 79 89
- Gallopoulos Nicholas E. Murphy Chester K. “Interactions between a Zinc Dialkylphosphorodithioate and Lubricating Oil Dispersants” ASLE Transactions 14 2 1971 1 7
- Otsubo K. “Effects of Dispersant-Detergent Additives on Friction and Wear Behaviour” Proceedings of the JSLE-ASLE International Lubrication Conference June 1975 749 757
- Ambrose H.A. Taylor J.E. “Wear Scuffing and Spalling in Passenger-Car Engines” SAE Transactions 63 1955 193 203
- Havely T.W. Pharen C.A. Bunnell D.G. “Influence of Lubricants and Material Variables on Cam and Tappet Surface Distress” SAE Transactions 63 1955 204 210
- Bidwell J.B. Vermarire Paul “Lifters and Lubricants” SAE Transactions 63 1955 211 220
- Barwood M.F. Kinder D.R. Manganello J.J. “Considerations Affecting the Life of Automotive Camshafts and Tappets” SAE Transactions 64 1956 139 152
- Laird J.S. Stevens C.L. Iles V.L. “Camshaft-Tappet Problems in Ford OHV Engines” SAE Transactions 64 1956 153 160
- Etchells E.B. Thomson R.F. Robinson G.H. Malone G.K. “Interrelationship of Design, Lubrication and Metallurgy in Cam and Tappet Performance” SAE Transactions 64 1956 161 181
- Towle A. “Some Problems and Developments in the Field of Automotive Lubrication” Proc Instn Mech Engrs 1970-71 185
- Love R.J. Wykes F.C. “The Scuffing of Automotive Cams and Followers” CME May 1975
- Love R.J. Wykes F.C. “European Practice in Respect of Automotive Cams and Followers” SAE Paper 750865 October 1975
- Slater B.B. “European Valve Train Wear -- Some Experience with the Volvo B 20 Test” SAE Paper 750866 October 1975