Soots from used diesel-engine oils: their effects on wear as measured in 4-ball wear tests
Diesel engine oil soots from different engines have the appearance of carbon black but contain significant concentrations of engine oil additive elements. Evaluation of the soots in 4-ball wear tests supported the theory that the soots reduce the antiwear additive effectiveness by preferentially adsorbing the active antiwear additive components before they can form the essential antiwear surface coating rather than removing the surface coatings by abrasion after they are formed. Engine load and exhaust gas recirculation have large effects on the soot prowear characteristics, whereas engine refinements, engine make and oil type have lesser effects. No antiwear additives were found more effective than the currently used zinc dialkyldithiophosphates. Several preferential adsorber additives were effective in simple blends but not in fully formulated engine oils.
- OSTI ID:
- 6538735
- Report Number(s):
- CONF-810206-21
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330101* -- Internal Combustion Engines-- Spark-Ignition
ABRASION
ABUNDANCE
ADDITIVES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMISORPTION
COMBUSTION PRODUCTS
DATA
DIESEL ENGINES
DIESEL FUELS
ENGINES
EXPERIMENTAL DATA
HEAT ENGINES
INFORMATION
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SEPARATION PROCESSES
SOOT
SORPTION
THIOLS
WEAR
ZINC COMPOUNDS
ZINC PHOSPHATES