Download or read book High temperature High shear HTHS Oil Viscosity written by James A. Spearot and published by ASTM International. This book was released on 1989 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Relating High Temperature High Shear Rate Viscosity to Engine Operation written by JA. Spearot and published by . This book was released on 1989 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The argument over which values of oil viscosity best correlate with measures of engine operation has gone on for many years. Over a decade ago (1977), the membership of the Engine Oil Subcommittee of the Society of Automotive Engineers (SAE) Fuels and Lubricants Committee (now the Fuels and Lubricants Division) agreed that there were enough data to justify asking the appropriate ASTM subcommittee (D02.07) to develop methods for determining values of high-temperature, high-shear-rate (HTHS) oil viscosity and to relate them to engine operation. In 1984, an ASTM task force finished reviewing the available literature and composed a report that summarized the effects of viscosity on bearing oil film thickness, engine wear, engine friction, and fuel economy (ASTM DS-62). This paper reviews the findings of that report and updates them in light of recent studies. The case for incorporating HTHS viscosity specifications into the Engine Oil Viscosity Classification, SAE J300, is presently stronger than ever. Suggestions are offered on how this incorporation might be accomplished and on what future directions ASTM research on HTHS viscosity should take.

Download or read book The Relationship Between High temperature Oil Rheology and Engine Operation written by ASTM Task Force DO2.O7.OB TF/EC on the Correlation of High-Temperature Oil Rheology with Engine Performance and published by ASTM International. This book was released on 1985 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Relationship Between Engine Oil Viscosity and Engine Performance written by Ross M. Stewart and published by ASTM International. This book was released on 1977 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Change of High Shear Rate Viscosity of Engine Oils During Use written by DL. Alexander and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has long been known that the kinematic viscosities of multigrade engine oils change with use, the typical pattern being an initial decrease followed by a gradual increase. Recent work has shown that the patterns of change of the high-temperature, high-shear (HTHS) viscosity are different than those of the kinematic viscosity. These results, coupled with recent bearing oil film thickness results, suggest that kinematic viscosity changes are less significant in the operation of the bearings of engines than has been assumed. The pattern of HTHS viscosity change has been found to depend on both viscosity index (VI) improver type and engine test. Oil-thickening effects tend to be more prominent in the HTHS viscosity patterns than in the kinematic viscosity patterns.

Download or read book The Relationship Between Engine Oil Viscosity and Engine Performance written by and published by ASTM International. This book was released on 1978 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Relationship Between Engine Oil Viscosity and Engine Performance written by and published by ASTM International. This book was released on 1977 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Co ordinating European Council CEC Contribution to the Measurement of High Temperature High Shear Rate Viscosity and Its Relationship to Engine Operation written by TW. Bates and published by . This book was released on 1989 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Co-ordinating European Council (CEC) studies showed good agreement among results obtained with different types of high-shear viscometers. Curve-fitting procedures based on the Extended Cross Equation provided a means of comparing results from different viscometers and permitted the interpolation and extrapolation of viscosities to a standard temperature and shear rate, for example, 150°C and 106 s-1. These studies contributed significantly to the development of the first low-cost, commercial, rotational viscometer capable of measuring viscosity over appropriate temperature and shear rate ranges. Satisfactory precision was demonstrated, and international standard procedures were established for the Ravenfield viscometer. Engine studies showed strong linear correlations of high-temperature, high-shear (HTHS) viscosity with engine friction, engine-bearing oil flow, and fuel saving. Results of engine wear tests, however, did not appear to be viscosity dependent. Areas for future study, for example, measurement of bearing oil film thickness, are indicated, and the interaction of CEC with the European Committee of Common Market Automobile Constructors (CCMC), ASTM, and the Society of Automotive Engineers (SAE) is described.

Download or read book Low Temperature Lubricant Rheology Measurement and Relevance to Engine Operation written by Robert B. Rhodes and published by ASTM International. This book was released on 1992 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers were presented at a symposium held in Austin, Texas, in December 1991. Subjects include a history of ASTM accomplishments in low temperature engine oil rheology from 1966-1992, critical aspects of pumping viscosity by mini-rotary viscometer, the scanning Brookfield technique of low temperatur

Download or read book The Relationship Between Engine Oil Viscosity and Engine Performance Part Iv written by and published by ASTM International. This book was released on 1978 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Relationship Between Engine Oil Viscosity and Engine Performance Part II written by and published by ASTM International. This book was released on 1977 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Relationship Between Engine Oil Viscosity and Engine Performance written by and published by . This book was released on 1978 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Hydraulic Fluid Technology written by George E. Totten and published by CRC Press. This book was released on 2011-10-05 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detailing the major developments of the last decade, the Handbook of Hydraulic Fluid Technology, Second Edition updates the original and remains the most comprehensive and authoritative book on the subject. With all chapters either revised (in some cases, completely) or expanded to account for new developments, this book sets itself apart by approa

Download or read book Fluid Film Lubrication Osborne Reynolds Centenary written by D. Berthe and published by Elsevier. This book was released on 1987-10-01 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thirteenth Leeds-Lyon Tribology Symposium was devoted to the topic of Fluid Film Lubrication in celebration of the centenary of the publication of the classical paper by Professor Osborne Reynolds in which he identified the mechanism of hydrodynamic lubrication. These proceedings contain more than seventy papers, written by authors from all over the world, covering the entire spectrum of fluid film lubrication. Of particular interest is the detailed consideration of a wide range of machine elements - bearings, seals, cams, rolling elements, as well as the in-depth, state-of-the-art, analytical contributions.

Download or read book Handbook of Hydraulic Fluid Technology written by George E. Totten and published by CRC Press. This book was released on 1999-10-15 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text aims to facilitate a broader understanding of the total hydraulic system, including hardware, fluid properties and testing, and hydraulic lubricants. It provides a comprehensive and rigorous overview of hydraulic fluid technology and evaluates the ecological benefits of water as an important alternative technology. Equations, tables and illustrations are used to clarify and reinforce essential concepts.

Download or read book S A E Handbook written by and published by . This book was released on 1988 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Engine Oils and Automotive Lubrication written by Wilfried J. Bartz and published by Routledge. This book was released on 2019-03-04 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses all the major aspects of automotive and engine lubrication - presenting state-of-the-art advances in the field from both research and industrial perspectives. This book should be of interest to mechanical, lubrication and automotive engineers, automotive and machinery designers as well as undergraduate and graduate students in these fields.