Mazda Motor Corporation

Hiromasa Yoshida

Kazuhiko Ueda

Hidetoshi Nobumoto

Hidenao Takedomi

An automatic transmission control system for controlling a gear ratio of an automatic transmission connected to an engine so as to bring an engine speed of rotation to a target speed of rotation predetermined according to a vehicle speed and a throttle opening of the engine. The control system includes an engine speed sensor for detecting an engine speed of rotation of the engine, a throttle opening sensor for detecting a throttle opening of a throttle of the engine, a vehicle speed sensor for detecting a vehicle speed a control mechanism for interrupting delivery of fuel to the engine while the engine speed of rotation is higher than a specified speed of rotation and the throttle opening is less than a specified opening, increasing the target engine speed of rotation while the throttle opening is less than the specified opening to increase the gear ratio and, when the trottle opening sensor detects a throttle opening increase above the specified opening after having once been decreased below the specified opening, the control mechanism controls the gear ratio according to the increased target engine speed of rotation until a target engine speed of rotation set according to the vehicle speed and a throttle opening becomes greater than the increased target engine speed of rotation.

Automatic transmission control system

A continuously variable transmission of a type having a toroidal transmission unit mounted for rotation on a engine torque input shaft and a planetary gear mechanism mounted on an output shaft in parallel to the input shaft to which engine torque is transmitted directly through an output gear fixedly mounted on the engine input shaft and through the toroidal transmission unit, is provided with a thrust generating mechanism mounted on the input shaft and pressed against a toroidal input disk for mechanically generating a axial thrust acting on the toroidal input disk. The thrust generating mechanism is located on the same side of the toroidal transmission unit as the side where the output gear is located.

Growing community of inventors

Hiroshima, Japan

Hiromasa Yoshida