Engine Durability, Emissions and Fuel Economy Studies with Special Boundary Lubricant Chemistry

Shaub, Hal; Pandosh, John; Searle, Anne; Sprague, Stan; Treuhaft, Martin B.

doi:10.4271/941983

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…Table-6 shows some of the physical characteristics of the lubricants used for this study. reduces the amount of wear on internal engine parts and reduces friction (Wilson, 1995;Schaub et al, 1994;Treuhaft et al, 1994).…”

Section: -6 Lubricantsmentioning

confidence: 99%

Tribological study of PS-23 for possible automotive applications

Carballo¹

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iii ACKNOWLEDGMENTS I would like to thank all the people who in some way or another have helped me get through this, members of my family and friends who have encouraged me to go on and who have helped me with sometimes the smallest of things but which have meant very much. I would also like to thank Mr. Gang Chen who has helped me in many of the details of this work while becoming a good friend in the process, and professor YanchingLiu for being so generous in providing his SEM expertise and work.I would also like to thank Mr. Peter Vega, vice-president of Bridgers Group, Inc., for the financial support and equipment he provided, and especially for the opportunity to do the research work which provides the foundation of this thesis.To my major professor Dr. Qian Wang I would also like to thank her for the opportunity and support she gave me and for her close help in all aspects of this work. The experimental results indicate that PS-230 contains unexpectedly high levels of calcium and phosphorus, and that mixing 10% PS-23@ in volume decreases the lubricant viscosity and increases its volatility. The start-stop tests using small engines were used to test PS-23® in a severe operating condition. The experimental observation suggests that under such an adverse combustion environment, the PS-23® 1OW-30 mixture is more likely to degrade. Further studies were conducted using a block-on-pin machine to determine the tribological behavior of PS-23 as an additive using a prepared steel sample and rotating piston pin, under both full film and boundary lubricating conditions. Both 1OW-30 motor oil and 80W-90 gear oil were used for these tests as the reference oil. It was found that under full film lubrication there were no substantial differences in the frictional coefficient with the use of PS-23®. However, under boundary lubricating v conditions it was found that the use of PS-23@ extended the time before failure was observed by a substantial amount. Other popular lubricant additives such as Slick-50 and Duralube were also used in the boundary lubrication tests, and although they performed better than the reference oil alone, they did not achieve the level of performance achieved with the use of PS-23 ® iv ABSTRACT OF THE DISSERTATION TRIBOLOGICAL STUDY OF PS-23® FOR

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Section: -6 Lubricantsmentioning

confidence: 99%

Tribological study of PS-23 for possible automotive applications

Carballo¹

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New field and engine test data to demonstrate the wear protection benefits of a unique boundary chemistry (UBC)

et al. 1999

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The wear protection performance of unique boundary chemistry (UBC), both while in the engine and after removal, was tested with reference to commercial API SG, API SH/ILSAC GF‐1, and API SJ/ILSAC GF‐2 quality oils in two 80,450 km field tests, in modified and standard sequence tests, and in radiotracer engine studies. The radiotracer tests of UBC added to an API SJ/ILSAC GF‐2 quality oil replicated previously published results of wear reductions achieved in a comparison of an API SH/ILSAC GF‐1 oil with and without UBC. In extended Sequence IIIE runs, two engines, each lubricated with the same API SH/ILSAC GF‐1 oil, were unable to complete the tests as a result of excessive oil consumption due to hot stuck rings. In contrast, two Sequence IIIE engines lubricated with the same API SH/ILSAC GF‐1 oil treated with UBC completed the extended test without incident, even though the UBC‐treated API SH/ILSAC GF‐1 oil replaced the API SH/ILSAC GF‐1 oil for the first oil drain interval only. A fully formulated SAE 5W–30 oil, which contained a full complement of UBC (20%), met all the requirements of API SH/ILSAC GF‐1 quality and gave very low average and maximum cam and cam plus lifter wear on standard ASTM Sequence VE and IIIE tests. The same API SH/ILSAC GF‐1 oil without UBC gave somewhat higher wear on both tests, but both oils met API SH/ILSAC GF‐1 requirements. Wear metals analysis of a field test of 36 taxicabs, which compared an API SJ/ILSAC GF‐2 quality oil to the same oil treated with UBC for the first drain interval, and also to a UBC‐treated oil at every oil change, showed a reduction in the rate of used oil Fe accumulation for both methods of UBC treatment. This test also revealed a striking impact on Fe levels from Si found in used oil samples during an episode of Si contamination in local gasoline supplies. Finally, in a field test of 10 taxicabs, with parts measured before and after testing, wear reductions were observed in rings and bearings in UBC‐treated cabs compared to those with API SG oil alone.

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Applications of Fluorinated Additives for Lubricants

Ebnesajjad¹,

Morgan²

2019

Fluoropolymer Additives

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Engine Durability, Emissions and Fuel Economy Studies with Special Boundary Lubricant Chemistry

Cited by 9 publications

References 5 publications

Tribological study of PS-23 for possible automotive applications

Tribological study of PS-23 for possible automotive applications

New field and engine test data to demonstrate the wear protection benefits of a unique boundary chemistry (UBC)

Applications of Fluorinated Additives for Lubricants

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