Transmission Fluid Compositions for Hybrid and Electric Vehicle Applications

A transmission fluid composition contains a major amount of a lubricating oil basestock, and a minor amount of an additive package comprising: (i) a mixture comprising two or more phosphites and/or phosphates; (ii) one or more thioester compounds; (iii) a detergent comprising calcium salicylate; and...

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Bibliographische Detailangaben
Hauptverfasser: Kahsar, Laura A, Cunningham, Matthew, Noles, JR., Joe R, Cogen, Kerry L, Chiappelli, Maria C, Watts, Raymond F, Kim, Hahnsoo, Gorda, Keith R
Format: Patent
Sprache:eng
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Zusammenfassung:A transmission fluid composition contains a major amount of a lubricating oil basestock, and a minor amount of an additive package comprising: (i) a mixture comprising two or more phosphites and/or phosphates; (ii) one or more thioester compounds; (iii) a detergent comprising calcium salicylate; and (iv) a poly(alkylene amine)-based ashless dispersant endcapped with metallocene-catalyzed PAO arms. Such a transmission fluid may be used for controlling/reducing wear in at least partially electrically-powered transmissions and/or for cooling/insulating electrical/electronic components of at least partially electrically-powered drivetrains.