Valvetrain Friction and Wear Performance of Polyalkylene Glycol Engine Oils

Autor: John B. Cuthbert, Sabrina L. Peczonczyk, Rob Zdrodowski, Ellen D. Hock, S. J. Simko, Arup Gangopadhyay, Douglas G. McWatt

Publikováno v: Tribology Transactions. 61:133-143

The application of polyalkylene glycol (PAG) as a base stock for engine oil formulation has been explored for substantial fuel economy gains over traditional formulations with mineral oils. Various PAG chemistries were explored by varying the feedsto

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ac76e9ec99e08315ce81826d384ceaf9
https://doi.org/10.1080/10402004.2017.1282572

Valvetrain Friction Reduction through Thin Film Coatings and Polishing

Autor: Steve Matera, Kirk Sheffer, Douglas G. McWatt, Robert Stephen Novi Furby, Arup Gangopadhyay, S. J. Simko, Rob Zdrodowski

Publikováno v: Tribology Transactions. 55:99-108

In a direct-acting mechanical bucket tappet–type valvetrain, the cam and tappet contact is responsible for about 85% of the total valvetrain frictional losses. Because this contact operates primarily in a mixed lubrication regime, it offers an oppo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1db3d0f1d00c1414ca687f88361cac36
https://doi.org/10.1080/10402004.2011.636169

Development of Modified Pag (Polyalkylene Glycol) High VI High Fuel Efficient Lubricant for LDV Applications

Autor: Douglas G. McWatt, S. J. Simko, John B. Cuthbert, Larry Dean Elie, Giovanni Ramirez, Arup Gangopadhyay, Rob Zdrodowski, Ellen D. Hock, Ali Erdemir, Zak Liu

Engine oils play a critical role in friction reduction. Improvements in engine oil technology steadily improved fuel economy as the industry moved through ILSAC GF-1 to GF-5 specifications. These improvements were influenced by changes in base oil ch

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7896e2c2633e3ec6ef4d9d1dd1806907
https://doi.org/10.2172/1234442

Surface Finish and Composition Dependence of Valvetrain Friction with Silicon Nitride Tappet Inserts

Autor: Richard L. Allor, Arup Gangopadhyay, Douglas G. McWatt, P. A. Willermet, Gary M. Crosbie

Publikováno v: 23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 20 Issue 4

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::512284d2fa8979ce086b4f9d43e76dfe
https://doi.org/10.1002/9780470294574.ch3