Prediction of ASTM Sequence VI and VIA Fuel Economy Based on Laboratory Bench Tests

Gangopadhyay, A.; Sorab, Jagadish; Willermet, P. A.; Schriewer, Kurt W.; Fyfe, K.; Lai, P. K. S.

doi:10.4271/961140

Cited by 17 publications

(5 citation statements)

References 8 publications

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“…The techniques used to perform these correlations were the same ones used previously by various researches to correlate oil properties to fuel economy performance measured in the sequence VIA engine test [4][5][6][7]. Given that the mathematical model obtained by means of a multiple linear regression procedure admits a maximum of three correlation parameters, we used a parameter that characterizes the hydrodynamic regime (HTHS viscosity), a second parameter that characterizes the boundary regime (boundary friction coefficient) and a third parameter that characterizes the EHD regime (friction coefficient in EHD regime).…”

Section: Theorymentioning

confidence: 99%

“…In addition to the standardized fuel economy tests that oils are required to pass to meet specifications, bench tests have historically been used to screen and assess the fuel economy performance of these oils [4][5][6][7]. These measurements are relatively quick and easy to obtain compared to the more sophisticated and expensive engine performance tests.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of fuel economy performance of engine lubricants based on laboratory bench tests

Maroto-Centeno

Pérez-Gutiérrez

Fernández-Ruíz-Morón

et al. 2016

Tribology International

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Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of fuel economy performance of engine lubricants based on laboratory bench tests

Maroto-Centeno

Pérez-Gutiérrez

Fernández-Ruíz-Morón

et al. 2016

Tribology International

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“…As shown in Figure 7, there are cases where viscosity has no effect on fuel efficiency. For many years, researchers have tried to determine the relative effect of viscosity, boundary friction and EHD friction on efficiency in engines, transmissions and axles [42,45,[88][89][90][91][92][93]. In these research efforts, a series of lubricants with different tribological properties are developed.…”

Section: Relative Effect Of Viscosity Boundary and Ehd Friction On Fmentioning

confidence: 99%

Common Properties of Lubricants that Affect Vehicle Fuel Efficiency: A North American Historical Perspective

Devlin¹

2018

Lubricants

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The development of advanced lubricants to improve vehicle fuel efficiency can appear to be as simple as lowering the viscosity and frictional properties of a fluid. However, applied research studies have shown that it is quite difficult to quantify the fuel efficiency properties of advanced lubricants in vehicles. A review of the historical research predominantly performed in North America in this area reveals that there are many factors to consider in order to demonstrate the effectiveness of advanced lubricants. First, the methodology used to measure vehicle fuel efficiency will impact the results since there are many factors not related to the lubricant which will influence vehicle fuel efficiency. Second, developing advanced fuel-efficient lubricants under well controlled conditions overlooks the issue that lubricant properties such as viscosity and friction affect the operating conditions encountered by the lubricant in the vehicle. Finally, the physical properties of lubricants that historically control fuel economy do not have the same effect on fuel efficiency in all vehicles. The proper vehicle or system level test needs to be selected to properly assess the benefits of new advanced lubricants.

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“…2. An alternative approach, adopted by Ford [21], BP [22], Ethyl [23] and Paramins±Imperial College [10], is to measure viscometric parameters of lubricants that are representative of hydrodynamic, mixed and boundary lubrication and then empirically to fit the EFEI (per cent) to fuel economy engine test results. The advantage of this technique is that it is simple and quick.…”

Section: Modelling Of Engine Friction and Fuel Economy Engine Testsmentioning

confidence: 99%

“…In engine design terms, this is straightforward to understand, since the Sequence VI-A engine employs roller follower valve trains whereas the Sequence VI engine used sliding followers. Gangopadhyay et al [21] carried out a similar analysis but used high-shear viscosities at temperatures appropriate to the engine test, rather than at the single value of 150 8C. This approach is, in principle, capable of distinguishing between oils that have the same HTHSV (at 150 8C) but different base oil viscosities.…”

Section: Empirical Fuel Economy Engine Test Modellingmentioning

confidence: 99%

Improved fuel efficiency by lubricant design: A review

Taylor

Coy

2000

Proceedings of the Institution of Mechanical Engineers, Part J:

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There is currently a strong focus on producing increasingly fuel-efficient vehicles, both to help meet CO 2 emissions reductions targets arising from the Kyoto Agreement on climate change, and, in certain countries, to avoid large government-imposed financial penalties. This paper reviews the role that lubricants can play in reducing a vehicle's fuel consumption. The paper reviews the lubricant factors that affect fuel consumption. The paper also reviews a number of engine friction models, which help to give insight into the relative importance of the different engine components to total engine friction. The paper reviews how these models compare with results from the European and US passenger car standard fuel economy engine tests now in place. The paper also reviews the issues surrounding engine durability with the lower-viscosity fuel economy lubricants that are now being developed. The majority of the paper is concerned with fuel economy in passenger car vehicles, but there is also some discussion of the issues surrounding improved fuel economy in heavy-duty diesel trucks.

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Prediction of ASTM Sequence VI and VIA Fuel Economy Based on Laboratory Bench Tests

Cited by 17 publications

References 8 publications

Prediction of fuel economy performance of engine lubricants based on laboratory bench tests

Prediction of fuel economy performance of engine lubricants based on laboratory bench tests

Common Properties of Lubricants that Affect Vehicle Fuel Efficiency: A North American Historical Perspective

Improved fuel efficiency by lubricant design: A review

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