LUBRICATION OF AN AUTOMATIC TRANSMISSION WITH REDUCED WEAR ON A NEEDLE BEARING

LUBRICATION OF AN AUTOMATIC TRANSMISSION WITH REDUCED WEAR ON A NEEDLE BEARING

A lubricant composition comprising (a) an oil having a kinematic viscosity at 100° C. of 2.2 to 3.7 mm2/s; at least one borate ester having an alkyl group of 4 to 18 carbon atoms in an amount to provide 25 to 150 parts per million by weight boron to the composition; and (c) at least one phosphorus e...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ABRAHAM, William D, ISHIZAKI, Keita
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
FUELS
LUBRICANTS
LUBRICATING COMPOSITIONS
METALLURGY
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
TECHNICAL GASES CONTAINING CARBON MONOXIDE
USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:A lubricant composition comprising (a) an oil having a kinematic viscosity at 100° C. of 2.2 to 3.7 mm2/s; at least one borate ester having an alkyl group of 4 to 18 carbon atoms in an amount to provide 25 to 150 parts per million by weight boron to the composition; and (c) at least one phosphorus ester in an amount to provide 150 to 650 parts per million by weight phosphorus to the composition, wherein the kinematic viscosity at 100° C. of the lubricant composition is less than or equal to 4.7 mm2/s, provides wear resistance to a needle bearing in an automatic transmission.