Heat transfer and tribological performance of graphene nanolubricant in an internal combustion engine

In this work the performance of graphene based nanolubricant using a 4-stroke IC engine test rig is investigated. A nanolubricant is formulated using graphene nanoflakes and engine oil meeting API 20W50 SN/CF and API 20W50 SJ/CF specifications. The addition of 0.01wt% graphene to API 20W50 SN/CF res...

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Published inTribology international Vol. 103; pp. 504 - 515
Main Authors Rasheed, A.K., Khalid, M., Javeed, A., Rashmi, W., Gupta, T.C.S.M., Chan, A.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2016
Subjects
Graphene
Nanolubricants
Nanotribology
Thermal efficiency
Nanotribology
Nanolubricants
Thermal efficiency
Graphene
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Summary:In this work the performance of graphene based nanolubricant using a 4-stroke IC engine test rig is investigated. A nanolubricant is formulated using graphene nanoflakes and engine oil meeting API 20W50 SN/CF and API 20W50 SJ/CF specifications. The addition of 0.01wt% graphene to API 20W50 SN/CF results in 23% enhancement in thermal conductivity (k) at 80°C, and 21% reduction in the coefficient of friction (µ). Moreover, 70% enhancement in heat transfer rate of the engine is also achieved in the presence of graphene. SEM images of the piston rings collected after 100h of engine operation show that the oil containing graphene (12nm) decreases the piston wear compared to base oil without graphene. •21%, 23%, 70% improvement in coefficient of friction (COF), thermal conductivity and heat transfer rate respectively.•Multiply tribo-morphological phenomenon assisted COF enhancement.•Graphene shape factor and liquid layering assisted thermal conductivity enhancement.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2016.08.007