Lubricant oil composition comprising borated cyclic carboxylic acid imide
AssigneeTonen Corporation
InventorsShigeko Taguchi, Hiroshi Nakanishi, Takanori Kugimiya
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Abstract
The present invention provides a lubricant oil composition for an automatic and continuously variable transmission with a built-in torque converter equipped with a lock-up clutch, which is incorporated, in the base oil, with a compound containing at least one type of cyclic carboxylic acid imide having boron in the molecule and substituted by an alkyl or alkenyl group, wherein the cyclic carboxylic acid imide is contained at 0.1 to 12 wt % based on the whole composition.
Claims4
A lubricant oil composition for increasing the coefficient of friction at a high sliding velocity of automatic and continuously variable transmissions equipped with a step-controller lock-up clutch, the composition comprising:
- a major amount of a lubricant base oil and from 0.1 to 12 wt % based on the whole composition of an additive containing at least one type of cyclic carboxylic acid imide having boron in the molecule and substituted by hydrocarbyl group selected from the group consisting of alkyl groups, or alkenyl groups and mixtures thereof, the composition having a coefficient of friction above 0.130 as determined by test JASO M349-95.
Dependencies are inferred from the claim text.