METHODS FOR IMPROVED POWER TRANSMISSION PERFORMANCE AND COMPOSITIONS THEREFOR

• US 20070004603A1
• Filed: 06/22/2006
• Published: 01/04/2007
• Est. Priority Date: 06/30/2005
• Status: Abandoned Application

• Current Assignee: Afton Chemical Corporation
• Original Assignee: Afton Chemical Corporation
• Inventors: Jao, Tze-Chi, Iyer, Ramnath, Tersigni, Samuel
• Application Number:
  US11/425,832
• Publication Number:
  US 20070004603A1
• Time in Patent Office: Days
• US Class Current: 508/441
• CPC Class Codes: C10M 141/10 at least one of them being an organic phosphorus-containing compound
• CPC Class Codes: C10M 163/00 Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
• CPC Class Codes: C10M 169/047 the additives being a mixture of compounds of unknown or incompletely defined constitution and macromolecular compounds
• CPC Class Codes: C10M 2207/021 having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2207/046 Hydroxy ethers
• CPC Class Codes: C10M 2207/262 derived from hydroxy substituted aromatic acids, e.g. salicylates
• CPC Class Codes: C10M 2209/104 of alkylene oxides containing two carbon atoms only
• CPC Class Codes: C10M 2209/109 esterified
• CPC Class Codes: C10M 2215/02 Amines, e.g. polyalkylene polyamines; Quaternary amines polyalkylene polyamines with eleven or more monomer units C10M2217/046
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/042 containing hydroxy groups; Alkoxylated derivatives thereof
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/104 containing sulfur and carbon with nitrogen or oxygen in the ring
• CPC Class Codes: C10M 2223/049 Phosphite
• CPC Class Codes: C10N 2030/02 Pour-point; Viscosity index
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/08 Resistance to extreme temperature
• CPC Class Codes: C10N 2030/76 Reduction of noise, shudder, or vibrations
• CPC Class Codes: C10N 2040/042 : for automatic transmissions
• CPC Class Codes: C10N 2060/12 : by phosphorus or a compound containing phosphorus, e.g. PxSy
• CPC Class Codes: F16H 57/04 : Features relating to lubrication or cooling or heatingin hydrokinetic gearing F16H41/30; control of lubrication or cooling in hydrostatic gearing F16H61/4165

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 improving anti-NVH durability in aged transmission fluids.

Claims

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, phosphorylated succinimide, tertiary fatty amine, and ethoxylated alcohol, in respective amounts effective for providing sustained anti-NVH durability upon aging in a power transmission lubricated therewith.

2. The fluid composition of claim 1, comprising 0.002-0.5 wt % alkoxylated amine, 0.001-0.5 wt % dihydrocarbyl phosphite, 0.01-1.0 wt % metallic detergent, 0.01-12 wt % phosphorylated succinimide, 0.005-1.0 wt % long chain tertiary amine, and 0.01-0.7 ethoxylated alcohol.

3. The fluid composition of claim 1, comprising 0.01-0.25 wt % alkoxylated amine, 0.01-0.2 wt % dihydrocarbyl phosphite, 0.01-0.7 wt % metallic detergent, 0.01-10 wt % phosphorylated succinimide, 0.01-0.7 wt % long chain tertiary amine, and 0.01-0.5 ethoxylated alcohol.

4. The fluid composition of claim 1, wherein the additive composition is present in an amount of about 3 wt % to about 20 wt %, based on the fluid composition.

5. The fluid composition of claim 1, wherein the additive composition is present in an amount of about 5 wt % to about 15 wt %, based on the fluid composition.

6. The fluid composition of claim 1, wherein the fluid composition is formulated such that the fluid composition comprises a viscosity at 100°

C. of <

6 cSt, a viscosity at 40°

C. of <

30 cSt, and a Brookfield Viscosity at −

40°

C. of <

10,000 cP, and wherein the fluid, when aged at 150°

C. for 200 hours, has a variation in coefficient of friction at testing rpm ranging from 50 to 300 of less than about 0.015 as determined from measurements taken on an SAE #2 Machine using a paper friction material lined clutch plate and testing conditions of 0.79N/mm².

7. The fluid composition of claim 1, wherein the fluid composition is formulated such that the fluid composition comprises a viscosity at 100°

C. of <

6 cSt, a viscosity at 40°

C. of <

30 cSt, and a Brookfield Viscosity at −

40°

C. of <

10,000 cP, and wherein the fluid has a quasistatic friction greater than 0.098 and static friction of 0.123 or greater as measured on a ZF GK rig.

8. The fluid composition of claim 1, wherein the fluid composition is formulated such that the fluid composition comprises a viscosity at 100°

C. of <

6 cSt, a viscosity at 40°

C. of <

30 cSt, and a Brookfield Viscosity at −

40°

C. of <

10,000 cP, and wherein an NVH characteristic of the fluid composition has a threshold pressure value greater in value than 0.8N/mm² as measured on a ZF GK rig.

9. The fluid composition of claim 8, wherein the NVH characteristic is squawk.

10. The fluid composition of claim 1, wherein the fluid composition is formulated such that the fluid composition comprises a viscosity at 100°

C. of <

6 cSt, a viscosity at 40°

C. of <

30 cSt, and a Brookfield Viscosity at −

40°

C. of <

10,000 cP, and wherein an NVH characteristic of the fluid after exposure to oxidizing conditions does not decrease in value below the initial value of the NVH characteristic value before the exposure as measured on a ZF GK rig.

11. The fluid composition of claim 1, wherein the base oil comprises one or more of a natural oil, a mixture of natural oils, a synthetic oil, a mixture of synthetic oils, a mixture of natural and synthetic oils, and a base oil derived from a Fischer-Tropsch or gas-to-liquid process.

12. The fluid composition of claim 1, wherein the additive composition further comprises one or more of a additional friction modifier, an additional detergent, an additional dispersant, an antioxidant, an antiwear agent, an antifoam agent, a viscosity index improver, a copper corrosion inhibitor, an anti-rust additive, a seal swell agent, a metal deactivator, and an air expulsion additive.

19. A transmission containing the fluid composition of claim 1.

20. The transmission of claim 19, wherein the transmission comprises a continuously variable transmission.

21. The transmission of claim 19, wherein the transmission comprises a dual clutch transmission.

22. The transmission of claim 19, wherein the transmission comprises an automatic transmission.

23. The transmission of claim 19, wherein the transmission comprises a manual transmission.

24. The transmission of claim 19, wherein the transmission comprises one or more of an electronically controlled converter clutch, a slipping torque converter, a lock-up torque converter, a starting clutch, and one or more shifting clutches.

25. The transmission of claim 19, wherein the transmission comprises a belt, chain, or disk-type continuously variable transmission, a 4-speed or more automatic transmission, a manual transmission, an automated manual transmission, or a dual clutch transmission.

26. A vehicle comprising an engine and a transmission, the transmission including the fluid composition of claim 1.

13. An additive composition comprising an alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, phosphorylated succinimide, tertiary fatty amine, and ethoxylated alcohol, in respective amounts effective for providing sustained anti-NVH durability upon aging in a power transmission apparatus lubricated therewith.

14. A method of improving anti-NVH durability in a power transmission apparatus having a friction torque transfer apparatus, comprising lubricating the friction torque transfer apparatus with a fluid composition comprising alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, phosphorylated succinimide, tertiary fatty amine, and ethoxylated alcohol, in respective amounts effective for providing sustained anti-NVH durability upon aging in the power transmission lubricated therewith.

15. The method of claim 14, wherein the friction torque transfer apparatus is selected from the group consisting of a shifting clutch, a starting clutch, a torque converter clutch, a band clutch, disk or plate clutch, and a limited slip differential clutch.

16. The method of claim 14, wherein the friction torque transfer apparatus comprises a shifting clutch.

17. A method for improving anti-NVH durability performance in a power transmitting apparatus comprising:

1) adding a fluid to a power transmitting apparatus, said fluid comprising (a) a base oil, and (b) an additive package comprising alkoxylated amine, dihydrocarbyl phosphite, metallic detergent, phosphorylated succinimide, tertiary fatty amine, and ethoxylated alcohol; and

2) operating the fluid in the power transmitting apparatus, wherein the additive package being present in an amount effective for providing improved anti-NVH durability upon aging in the power transmission lubricated therewith.

18. The method of claim 17, wherein the fluid composition is formulated such that the fluid composition comprises a viscosity at 100°

C. of <

6 cSt, a viscosity at 40°

C. of <

30 cSt, and a Brookfield Viscosity at −

40°

C. of <

10,000 cP, and wherein the fluid, when aged at 150°

C. for 200 hours, has a variation in coefficient of friction at testing rpm ranging from 50 to 300 of less than about 0.015 as determined from measurements taken on an SAE #2 Machine using a paper friction material lined clutch plate and testing conditions of 0.79N/mm² at 150°

C. for 200 hours, and wherein an NVH characteristic of the fluid after exposure to oxidizing conditions does not decrease in value below the initial value of the NVH characteristic before the exposure as measured on a ZF GK rig.