C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 129/26 (2006.01) C10M 135/10 (2006.01) C10M 137/06 (2006.01) C10M 159/20 (2006.01) C10M 159/22 (2006.01) C10M 159/24 (2006.01)
Patent
CA 2425383
Continuously variable transmissions are lubricated by supplying to the transmission a composition of an oil of lubricating viscosity and an oil- soluble zinc salt containing at least one hydrocarbyl group of at least 4 carbon atoms. The amount of the zinc salt is sufficient to provide an increased steel-on-steel dynamic coefficient of friction for the composition, being at least 0.125. The composition is substantially free from thiophosphate salts and exhibits a copper corrosion rating of 1B or better (ASTM-130).
On lubrifie, dans le cadre de ce procédé, des transmissions à variation continue en déposant sur ces transmissions une composition à base d'une huile d'une certaine viscosité et d'un sel de zinc soluble dans l'huile renfermant au moins un groupe hydrocarbyle porteur d'au moins 4 atomes de carbone. La quantité de sel de zinc est suffisante pour assurer à la composition un coefficient dynamique amélioré acier sur acier, de l'ordre d'au moins 0125. La composition, qui est quasiment exempte de sels de thiophosphate présente un niveau de corrosion du cuivre de 1B ou mieux (ASTM-130).
Sowerby Roger L.
Sumiejski James L.
Tipton Craig D.
Ridout & Maybee Llp
The Lubrizol Corporation
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