Evaluation of Hydrous Ethanol Fuel Lubricity by HFRR National Institute of AIST

Format:

Conference/Event

Author/Creator:

Oguma, Oguma, author.

Contributor:

Higurashi, Kazuaki

Kaitsuka, Masayoshi

Matsuno, Mayumi

Conference Name:

SAE 2016 International Powertrains, Fuels & Lubricants Meeting (2016-10-24 : Baltimore, Maryland, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2016

Summary:

AbstractImprovement of thermal efficiency is an important problem for internal combustion engines. Fuel reforming with dehydrogenation reaction by exhaust heat is one of the measures to increase thermal efficiency using hydrogen mixed SI combustion. For this kind engine system, hydrous ethanol has a good potential. Furthermore, when the hydrous ethanol inject to combustion chamber directory, high compression combustion can be achieved by its large amount of latent heat. Therefore, fuel lubricity is an important check point for the hydrous ethanol reforming engine systems. In this study, effect of water concentrations within ethanol on the hydrous ethanol fuel lubricity has been evaluated using HFRR (High-Frequency Reciprocating Rig) test method. Wear scar diameter on 100 % of ethanol was around 700 μm which was a little better than gasoline lubricity. When the water concentration within ethanol was increased, the wear scar diameters were decreasing around 330 μm. Considering this phenomenon by the fuel viscosity, the viscosity of hydrous ethanol is growing with increasing water concentration up to 50-60 %. It seems that lubricity of hydrous ethanol can be kept by fluid film lubrication mode up to 50-60 % of water concentration

Notes:

Vendor supplied data

Publisher Number:

2016-01-2260

Access Restriction:

Restricted for use by site license