Methods for improved power transmission performance and compositions therefor
OwnerRamnath Iyer, Timothy Cameron +3inventors
InventorsRamnath Iyer, Timothy Cameron, Samuel Tersigni, Harald Maelger, Tze-Chi Jao
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Abstract
Advanced methods are provided for achieving improved power transmission performance, and unique fluid compositions useful for practicing such methods are also presented. In particular a method and related composition is provided for reducing NVH in a power transmission apparatus having a friction torque transfer apparatus, such as, e.g., a shifting clutch, comprising maintaining a negative ∂μ/∂T slope, and/or a negative ∂μ/∂P slope, during engagement of the friction torque transfer apparatus.
Claims23
A fluid composition, comprising:
- (1) a major amount of a base oil, and
- (2) a minor amount of an additive composition comprising alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, and phosphorylated succinimide, in respective amounts effective for providing a negative ∂μ/∂T during engaging, slipping or modulating of a power transmission friction torque transfer apparatus lubricated therewith.
An additive composition comprising alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, and phosphorylated succinimide, in respective amounts effective for providing a negative ∂μ/∂T during engagement of a power transmission shifting clutch lubricated therewith.
A method of reducing NVH in a power transmission apparatus having a friction torque transfer apparatus comprising lubricating the friction torque transfer apparatus with a fluid composition that provides a negative ∂μ/∂T during engaging, slipping or modulating the friction torque transfer apparatus, said fluid comprising alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, and phosphorylated succinimide, in respective amounts effective therefor.
A method for improving anti-NVH control performance in a power transmitting apparatus comprising:
- A) adding a fluid to a power transmitting apparatus, said fluid comprising (i) a base oil, and (ii) an additive package comprising alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, and phosphorylated succinimide;
- and
- B) operating the fluid in the power transmitting apparatus, wherein the additive package being present in an amount effective for providing a negative ∂μ/∂T during engaging, slipping or modulating of a power transmission friction torque transfer apparatus lubricated therewith.
A method of reducing NVH in a power transmission apparatus having a friction torque transfer apparatus comprising lubricating the friction torque transfer apparatus with a fluid composition that provides a negative ∂μ/∂P during engaging, slipping or modulating the friction torque transfer apparatus, said fluid comprising alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, and phosphorylated succinimide, in respective amounts effective therefor.
Dependencies are inferred from the claim text.