METHODS FOR IMPROVED POWER TRANSMISSION PERFORMANCE AND COMPOSITIONS THEREFOR
First Claim
Patent Images
1. 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.
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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.
56 Citations
23 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
9. 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.
- μ
-
10. 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.
- μ
-
11. 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. - View Dependent Claims (12, 13, 14)
-
-
15. 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.
- μ
Specification