Tribological bench and engine dynamometer tests of a low viscosity SAE 0W-16 engine oil using a combination of ionic liquid and ZDDP as anti-wear additives

Barnhill, William C.; Gao, Hong; Kheireddin, Bassem; Papke, Brian L.; Luo, Huimin; West, Brian H.; Qu, Jun

doi:10.3389/fmech.2015.00012

Title: Tribological bench and engine dynamometer tests of a low viscosity SAE 0W-16 engine oil using a combination of ionic liquid and ZDDP as anti-wear additives

Journal Article · Tue Sep 29 00:00:00 EDT 2015 · Frontiers in Mechanical Engineering

DOI:https://doi.org/10.3389/fmech.2015.00012· OSTI ID:1222553

Barnhill, William C. ^[1]; Gao, Hong ^[2]; Kheireddin, Bassem ^[2]; Papke, Brian L. ^[2]; Luo, Huimin ^[1]; West, Brian H. ^[1]; Qu, Jun ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Shell Projects and Technology, Houston, TX (United States)

We have previously reported an oil-miscible phosphonium-organophosphate ionic liquid (IL) with an effective anti-wear (AW) functionality when added to a base oil by itself or combined with a conventional zinc dialkyldithiophosphate (ZDDP) for a synergistic effect. In this research, we investigated whether this synergy manifests in formulated engine oils. An experimental SAE 0W-16 engine oil was generated containing a combination of IL and ZDDP with equal phosphorus contribution. The prototype engine oil was first evaluated using tribological bench tests: AW performance in boundary lubrication (BL) and friction behavior (Stribeck curves) in elastohydrodynamic, mixed, and BL. In addition, the forthcoming standard Sequence VIE engine dynamometer test was then conducted to demonstrate improved fuel economy. Results were benchmarked against those of another experimental engine oil with almost the same formulation except using ZDDP only without the IL (similar total phosphorus content). The IL-ZDDP formulation consistently outperforms the ZDDP-only formulation in friction reduction and wear protection, and results from the bench and engine tests are well correlated.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1222553

Journal Information:: Frontiers in Mechanical Engineering, Vol. 1, Issue 12; ISSN 2297-3079

Publisher:: Frontiers Research FoundationCopyright Statement

Country of Publication:: United States

Language:: English

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