Toyota Jidosha Kabushiki Kaisha

Aisin Corporation

Hideaki Takahara

Keisuke Ninomiya

Yu Inase

Fumiya Kaji

Yuji Nagasawa

Junichi Tokunaga

Akira Ochi

Takayuki Miyake

Ryuji Chida

Wataru Ishihara

Kazunori Harima

Ryohei Urata

Elements of a transmission belt wound around pulleys of a continuously variable transmission each include a body part, a pair of pillar parts, and a pair of side surfaces. The pair of side surfaces each include a first side surface formed on a corresponding one of the pillar parts; and a second side surface formed so as to continue from the first side surface, and located more on an inner circumference side than the first side surface. A pair of the first side surfaces each are formed so as to be inclined toward an inner side of a corresponding one of the pillar parts with respect to an extending direction, from an inner circumference side to an outer circumference side of a ring, of a corresponding one of the second side surfaces continuing from the first side surface, and a pair of the second side surfaces is formed such that the second side surfaces are spaced farther apart from each other as the second side surfaces extend from the inner circumference side to the outer circumference side, and that an angle formed between the pair of the second side surfaces is larger by 0.2 to 0.8 degrees than an opening angle of V-shaped grooves of the pulleys.

Transmission belt and continuously variable transmission, method for designing element, and method for producing element

A continuously variable transmission is configured such that a transmission ratio continuously changes by continuously changing widths of belt winding grooves of a primary pulley and a secondary pulley, and includes: the primary pulley including a first fixed sheave and a first moving sheave provided in a primary shaft; the secondary pulley including a second fixed sheave and a second moving sheave provided in a secondary shaft; a metal transmission belt wound around the primary pulley and the secondary pulley; and a moving apparatus configured to integrally move the secondary shaft and a secondary bearing supporting the secondary shaft such that a relative positional relationship between the first fixed sheave and the second fixed sheave changes.

Continuously variable transmission including a primary pulley, a secondary pulley, a metal transmission belt, and a moving apparatus

A vehicle power transmission device includes a forward first clutch between an engine and an input shaft of a continuously variable transmission, and a second clutch between an output shaft of the continuously variable transmission and driving wheels. When the hydraulic fluid of the hydraulic pump is not supplied to the first disconnection device and the second disconnection device, a dragging torque generated in the second disconnection device is larger than a dragging torque generated in the first disconnection device.

Vehicle power transmission device

Growing community of inventors

Toyota, Japan

Hideaki Takahara