Idemitsu Kosan Company, Limited

Hideo Igarashi

Toshihiko Ichihashi

Junichi Deshimaru

Hiromichi Seiki

Toshiki Ikeda

Noboru Sonoda

An oil composition for continuously variable transmissions (CVT) comprising a base oil, (A) a sulfonate, (B) an ashless dispersant, (C) an acid amide, (D) an organomolybdenum compound, and (E) an amine antioxidant. The oil composition for CVT prevents the scratching phenomenon while the transmitted power is kept large in CVT of a belt type used for automatic transmissions of automobiles. The gradient in the .mu.-V characteristic can be kept positive for a long time.

Oil composition for continuously variable transmissions

Disclosed is a lubricating oil composition for automatic transmissions, which comprises a base oil and additives of (A) a sulfur-containing antioxidant or an amine-type antioxidant, (B) a phosphate or its amine salt, and (C) a reaction product of a carboxylic acid and an amine. The composition has an excellent ability to prevent the brake lining of the clutch of automatic transmissions from shuddering, and can maintain the shudder-preventing ability for a long period of time.

Lubricating oil composition for automatic transmission

Lubricant composition for continuous variable transmissions and method

Lubricating oil composition which comprises: lubricating base oil,

Growing community of inventors

Ichihara, Japan

Hideo Igarashi