Automatic transmission fluids and additives therefor

Details Automatic transmission fluids and additives therefor Automatic transmission fluids and additives therefor

1994-02-10

1994-12-13

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

C10M12904, C10M13304

Patent

active

053727355

ABSTRACT:
An effective way is described for overcoming the shudder problem associated with continuous slip torque converter clutches for use in automatic transmissions, especially shudder which occurs with new friction materials before break-in. To do this, an ATF is used in which the friction modifier system consists essentially of (i) an N-aliphatic hydrocarbyl-substituted diethanolamine in which the N-aliphatic hydrocarbyl-substituent is at least one straight chain aliphatic hydrocarbyl group free of acetylenic unsaturation and having in the range of 14 to 20 carbon atoms, and (ii) an N-aliphatic hydrocarbyl-substituted trimethylenediamine in which the N-aliphatic hydrocarbyl-substituent is at least one straight chain aliphatic hydrocarbyl group free of acetylenic unsaturation and having in the range of about 14 to about 20 carbon atoms. The ATF is devoid of any tertiary amine friction modifier component and any C.sub.12-36 aliphatic hydrocarbyl succinimide or succinamide friction modifier. Specified relative proportions and concentrations of (i) to (ii) are used.

REFERENCES:
patent: 3238130 (1966-03-01), Matson
patent: 4382006 (1983-05-01), Horodysky
patent: 4409000 (1983-10-01), Le Suer
patent: 4704217 (1987-11-01), Sweeney et al.
patent: 5078893 (1992-01-01), Ryer et al.
patent: 5254277 (1993-10-01), Gentil et al.
patent: 5286394 (1994-02-01), Moore

Affiliated with

Also associated with

Rating

Automatic transmission fluids and additives therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic transmission fluids and additives therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic transmission fluids and additives therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1191317