ZDDP is the industry standard anti wear additive used by oil formulators for the past 50 years to provide the antiwear and load bearing capacity of engine oil. The breakdown of ZDDP results in the formation of sulfides and phosphates which provide anti-wear protection. In addition to its role as an anti-wear additive ZDDP also performs the role of an antioxidant. The performance of ZDDP is reduced by other parts of the additive package which include dispersants, pH stabilizers, and detergents. These constituents stabilize ZDDP and reduce its activity. The breakdown of ZDDP also creates S and P that can poison catalytic converters resulting in higher hydrocarbon and NOx emissions. GF-4 oils have lower ZDDP content to meet federal emission standards. In addition, to meet CAFE´ fuel economy standards, the industry is moving towards lower weight 5W-20 oil. The lower weight base oil coupled with lower ZDDP content have put additional constraints in developing high performance GF-4 oil. An additive package developed by Platinum Research Organization and the Tribology Group at University of Texas at Arlington is evaluated. This additive package enhances the activity of ZDDP and increases its anti-wear performance. This paper presents results from bench top tribology tests that were conducted to evaluate the performance of GF-4 oils with different amounts of ZDDP, additive package and an Fe based active ingredient. Results are discussed with respect to the extent of wear for a fixed number of wear cycles in a ball on cylinder test conducted under boundary conditions. In the presence of FeF3 active ingredient fully formulated oils with as little as 0.01% P exhibits antiwear performance comparable to oils with as much as 0.05% P and oils with 0.05%P are comparable to oils with 0.1%P. Differential scanning calorimetry indicates that the decomposition temperature of ZDDP is reduced by as much as 20°C in the presence of FeF3. This reduced decomposition temperature results in the efficient formation of anti-wear films even with lower ZDDP amounts.
Skip Nav Destination
World Tribology Congress III
September 12–16, 2005
Washington, D.C., USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4201-0
PROCEEDINGS PAPER
Development of Low Phosphorous Engine Oils
K. Patel,
K. Patel
Platinum Research Organization, Dallas, TX
Search for other works by this author on:
P. B. Aswath,
P. B. Aswath
University of Texas at Arlington, Arlington, TX
Search for other works by this author on:
R. L. Elsenbaumer
R. L. Elsenbaumer
University of Texas at Arlington, Arlington, TX
Search for other works by this author on:
K. Patel
Platinum Research Organization, Dallas, TX
P. B. Aswath
University of Texas at Arlington, Arlington, TX
R. L. Elsenbaumer
University of Texas at Arlington, Arlington, TX
Paper No:
WTC2005-64078, pp. 557-558; 2 pages
Published Online:
November 17, 2008
Citation
Patel, K, Aswath, PB, & Elsenbaumer, RL. "Development of Low Phosphorous Engine Oils." Proceedings of the World Tribology Congress III. World Tribology Congress III, Volume 1. Washington, D.C., USA. September 12–16, 2005. pp. 557-558. ASME. https://doi.org/10.1115/WTC2005-64078
Download citation file:
4
Views
Related Proceedings Papers
Related Articles
A Boundary Lubrication Friction Model Sensitive to Detailed Engine Oil Formulation in an Automotive Cam/Follower Interface
J. Tribol (October,2011)
Gasoline Engine and Aftertreatment Modeling and Control
Mechanical Engineering (December,2015)
The Effects of Diesel Fuel Properties on Performance, Smoke, and Emissions
J. Eng. Power (October,1979)
Related Chapters
The CGM File Parsing Based CARNAC.NET
International Conference on Future Computer and Communication, 3rd (ICFCC 2011)
Combined Cycle Power Plant
Energy and Power Generation Handbook: Established and Emerging Technologies
The Tribological Character of LB Films of Dipalmitoylphosphatidylcholine (DPPC)
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3