Comparison of the effects of biodiesel and mineral diesel fuel dilution on aged engine oil properties

You are here: Homepage > Search

Comparison of the effects of biodiesel and mineral diesel fuel dilution on aged engine oil properties

Uy, Dairene / Zdrodowski, Robert J. / O'Neill, Ann E. / Simko, Steven J. / Gangopadhyay, Arup K. / Morcos, Michelle / Lauterwasser, Frank / Parsons, Gary

Abstract

Dilution of engine oil occurs when fuel is injected late in the combustion cycle to regenerate the diesel paniculate filter used for trapping paniculate emissions. Fuel dilution reduces oil viscosity and the concentration of engine oil additives, potentially compromising lubricantperformance. Biodiesel usage may compound these issues due to its oxidative instability, and its higher boiling point compared to mineral diesel potentially causes it to concentrate more in the oil sump. In this work, different amounts of mineral diesel and biodiesel (soy methyl ester, SME) were combined with 15W-40 CJ-4 diesel engine oil in laboratory oil aging experiments. Fuel was added and oil samples were withdrawn at periodic intervals. The oils were analyzed using typical oil analysis procedures to determine their condition, and wear evaluations under boundary lubricating conditions were determined using a high-frequency reciprocating rig (HFRR). Results showed that fuel dilution accelerated engine oil degradation, with biodiesel having a larger effect. However, friction remained unchanged with dilution, and wear actually decreased for fuel-diluted oils after 48 h of aging compared to aging without fuel dilution. Examination of the tribofilms by ultraviolet (UV) and visible Raman spectroscopy as well as Auger electron spectroscopy showed that additional carbon-containing components were present on tribofilms formed from fuel-diluted oils. These fuel-derived components may be responsible for the decreased wear observed.

Access

Access via TIB

Check availability in my library

Order at Subito €

Export, share and cite

Document information

Title :

Comparison of the effects of biodiesel and mineral diesel fuel dilution on aged engine oil properties

Contributors:

Uy, Dairene (author) / Zdrodowski, Robert J. (author) / O'Neill, Ann E. (author) / Simko, Steven J. (author) / Gangopadhyay, Arup K. (author) / Morcos, Michelle (author) / Lauterwasser, Frank (author) / Parsons, Gary (author)

Published in:

Tribology Transactions ; 54 , 5 ; 749-763

Publication date :

2011

Size :

15 Seiten, 15 Bilder, 1 Tabelle, 38 Quellen

ISSN :

1040-2004

DOI :

https://doi.org/10.1080/10402004.2011.597545

Type of media :

Article (Journal)