Fuel Economy Improvement by Engine Oil with Ultra-High Viscosity Index

Onodera, Ko; Watanabe, Honami; Sato, Takehisa; Lee, Gordon H.; Kaneko, Toyoharu; Yamamori, Kazuo; Miyata, Itsuki

doi:10.4271/2019-01-2203

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…With the significant threat posed by global climate change to human society in recent years, CO 2 reduction and improvement of vehicle fuel efficiency are needed to respond to global warming. As a way to improve fuel efficiency, reduction of engine oil viscosity has been proven effective. − Consequently, the trend of development for lubricants is a remarkable reduction in the viscosity. As is well-known, lubricants are usually composed of additives and base oil, and the mass fraction of base oil exceeds 80%, which leads to the results that the quality and performance of lubricants are directly determined by the base oil to a large extent.…”

Section: Introductionmentioning

confidence: 99%

Rapid Separation and API Grades Identification of Base Oil in Low Viscosity Gasoline Engine Oil SN 0W-16

Kang,

Zhang,

Liu

et al. 2024

ACS Omega

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Using low viscosity engine oil is one of the most economical and easily achievable ways to improve fuel economy. Base oil is a main component in low viscosity engine oils, and therefore, the separation and identification of its are of great significance for oil product developers to prepare high-performance lubricants. However, the extraction methods reported for base oils mainly adopt membrane dialysis, which not only fails to completely separate the base oil but also wastes a large amount of solvent. The reason for this result is that the concentration of substances inside and outside the membrane cannot always be in an imbalanced state of permeation resulting from manual operation. Additionally, most studies primarily focus on the characterization of base oil components, while there are few reports on grade identification. For the above reasons, an economically effective separation technique of base oil from low viscosity gasoline engine oil SN 0W-16 is successfully established by combining improved Soxhlet extraction and a column chromatography separation method. By applying this method, the yield of extracting base oil generally exceeds 96%, and the solvent can also save more than 3 times. Besides, an exclusion method is built through several simple characterization steps including viscosity index (VI), FT-IR, size-exclusion chromatography (SEC), and hydrocarbon composition, which can quickly identify the American Petroleum Institute (API) grade and brand of the base oils.

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Section: Introductionmentioning

confidence: 99%

Rapid Separation and API Grades Identification of Base Oil in Low Viscosity Gasoline Engine Oil SN 0W-16

Kang,

Zhang,

Liu

et al. 2024

ACS Omega

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“…One of the ways to reduce viscous drag losses and thereby improve fuel economy is by using low-viscosity engine oils. − However, decreasing the base oil viscosity will result in high friction and wear at higher operating temperatures in automotive engines . Viscosity modifier (VM) is added to the base oil to minimize the change in viscosity of lubricant oil with temperature, that is, to impart sufficient oil thickness at high temperatures, yet maintain the oil thin enough at low temperatures to not impede lubricant flow .…”

Section: Introductionmentioning

confidence: 99%

Effect of Base Oil Polarity on the Functional Mechanism of a Viscosity Modifier: Unraveling the Conundrum of Coil Expansion Model

Lee,

Poornachary,

Tee

et al. 2023

Ind. Eng. Chem. Res.

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“…The hybridization of a conventional internal combustion engine significantly improves the fuel economy of a vehicle. However, this change will bring about a lower oil temperature, which will affect the design of additive technology in engine oils [1]. Molybdenum dithiocarbamate (MoDTC), which is widely used as a friction modifier (FM) of lubricants for conventional engines, decomposes at high temperature to form a low-friction MoS 2 film on metal surfaces.…”

Section: Introductionmentioning

confidence: 99%

<i>In Situ</i> FTIR Observation of the Polymer FM Enrichment at the EHL Contact

Goto¹,

Onodera²,

Sato³

et al. 2020

Tribology Online

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Research interests recently increased in studying polymer-type friction modifiers (polymer FM) consisting of a polymer backbone and a functional group because of their good friction reduction capability. However, there is no clear verification of their working mechanisms. Therefore, the polymer FM behavior at the contact region must be understood to provide mechanistic information and design further-improved polymer FMs. For this purpose, in situ observation techniques have been applied to the chemical analysis of the oil film formed from a polymer FM using a micro-Fourier transform infrared spectrometer. The experimental results indicate that the polymer concentrations at the Hertzian contact drastically increased, exceeding the bulk concentration of oil. The following new friction reduction mechanism is proposed based on the clarified polymer FM concentration: the concentrated adsorption layer of the polymer FM prevents direct contact of the surface asperities.

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Fuel Economy Improvement by Engine Oil with Ultra-High Viscosity Index

Cited by 7 publications

References 2 publications

Rapid Separation and API Grades Identification of Base Oil in Low Viscosity Gasoline Engine Oil SN 0W-16

Rapid Separation and API Grades Identification of Base Oil in Low Viscosity Gasoline Engine Oil SN 0W-16

Effect of Base Oil Polarity on the Functional Mechanism of a Viscosity Modifier: Unraveling the Conundrum of Coil Expansion Model

<i>In Situ</i> FTIR Observation of the Polymer FM Enrichment at the EHL Contact

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