The role of soot particles in the tribological behavior of engine lubricating oils

This paper describes a study of the influence of soot contamination on the tribological behavior of engine lubricants. The candidate lubricants were a formulated engine lubricant, (CD SAE 15W-40) and a base oil (150SN). Soot particle contamination was simulated using carbon black with friction and w...

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Bibliographic Details
Published in:Wear 2013-07, Vol.304 (1-2), p.152-161
Main Authors: Hu, Enzhu, Hu, Xianguo, Liu, Tianxia, Fang, Ling, Dearn, Karl D., Xu, Hongming
Format: Article
Language:English
Subjects:
Antifriction
Applied sciences
Carbon black
Contact of materials. Friction. Wear
Contamination
Engines
Exact sciences and technology
Lubricant
Lubricants
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Sliding friction
Soot
Tribochemistry
Tribology
Wear
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Summary:This paper describes a study of the influence of soot contamination on the tribological behavior of engine lubricants. The candidate lubricants were a formulated engine lubricant, (CD SAE 15W-40) and a base oil (150SN). Soot particle contamination was simulated using carbon black with friction and wear measured using a four-ball tribometer. The results show that the antiwear and antifriction properties of the CD SAE 15W-40 formulated oil with varying carbon black contents were better than those of 150SN base oil. The antifriction properties of the SAE 15W‐40 formulated oil with the addition of 2wt% carbon black were strengthened. This was ascribed to uniformly dispersed carbon black and the additives in the CD SAE 15W-40. The antifriction properties of the 150SN base oil with 2, 4wt% carbon black content were upgraded via the addition of 2wt% dispersant polyisobutylene succinimide. The tribological effect of the carbon black in the lubricants was attributed to absorption and agglomerate effects. •Investigation of tribological effects of simulated engine soot using carbon black.•A formulated engine lubricant (CD SAE 15W-40) and base oil (150SN) tested.•Lubricity of CD SAE 15W-40 with carbon black was better than that of 150SN.•Low levels (by wt%) of carbon black improved reduced the lubricant's friction with lubricant resistance.•The dispersant T154 improved the lubricity of the base oil with carbon black.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2013.05.002