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@article{Yu:2021:10.1016/j.triboint.2020.106828,
author = {Yu, M and Zhang, J and Joedicke, A and Reddyhoff, T},
doi = {10.1016/j.triboint.2020.106828},
journal = {Tribology International},
pages = {1--9},
title = {Experimental investigation into the effects of diesel dilution on engine lubrication},
url = {http://dx.doi.org/10.1016/j.triboint.2020.106828},
volume = {156},
year = {2021}
}
TY - JOUR
AB - The dilution of lubricant due to contamination with diesel fuel is an increasingly prevalent, potentially importantand poorly understood issue. Thisstudy addressestwo fundamental questions: 1) How doesthe change in lubricantrheology due to diesel dilution affect engine lubrication? 2) How is the chemical performance of lubricantcomponents (base oil and performance additives) impacted by diesel dilution under different lubrication regimes(boundary/full film, hydrodynamic/elastohydrodynamic). This is achieved by testing three lubricant samples: 1)neat fully formulated 0W-30 engine oil, 2) fully formulated 0W-30 oil diluted with diesel at a concentration of15%, denoted “0W-30D”, and 3) neat, fully-formulated 0W-16, with the same base oil components andperformance additives as the 0W-30, but blended to give a viscosity equal to that of the diluted an equivalent“0W-30D”. Tribometer tests, including 1) low pressure, low shear viscosity, 2) Ultra-high Shear Viscosity (USV),3) elastohydrodynamic film thickness, 4) Stribeck friction and 5) boundary friction and wear, are then conducted.To further emulate engine lubrication conditions, Stribeck curve measurements are performed on the threelubricants using a journal bearing test rig, fitted with a connecting-rod and commercial diesel engine shells.Results suggest that diesel dilution only slightly affects chemical additive performance (with friction modifiersbeing more inhibited than anti-wear additives) but does reduce both viscosity and film thickness. However, caremust be taken in using viscometrics to predict dilution behaviour because 1) the pressure viscosity coefficient isalso affected by diesel dilution which has implications for elastohydrodynamically lubrication contacts, 2) shearthinning means that viscosity modifier additives effects lose their functions at high shear rates; whereas dieselcontamination affects viscosity behaviour throughout the whole shear rate range.
AU - Yu,M
AU - Zhang,J
AU - Joedicke,A
AU - Reddyhoff,T
DO - 10.1016/j.triboint.2020.106828
EP - 9
PY - 2021///
SN - 0301-679X
SP - 1
TI - Experimental investigation into the effects of diesel dilution on engine lubrication
T2 - Tribology International
UR - http://dx.doi.org/10.1016/j.triboint.2020.106828
UR - https://www.sciencedirect.com/science/article/pii/S0301679X20306538?via%3Dihub
UR - http://hdl.handle.net/10044/1/85057
VL - 156
ER -