Mazda Motor Corporation

Hidenao Takedomi

Kazuhiko Ueda

Tatsuya Uesugi

Hisanori Nakane

Toshihiko Osumi

Hiromasa Yoshida

Haruo Sakamoto

The object of the present invention is to provide compact toroidal type continuously variable transmission for a front engine front wheel drive vehicle, which employs geared neutral starting system. The toroidal type continuously variable transmission according to the present invention comprises an input shaft,whose one end is coupled with an engine, a primary shaft,into which said input shaft is fittingly inserted with play, a secondary shaft,which is disposed parallel with said shafts and whose engine side end is coupled with a differential gear unit,, toroidal type continuously variable transmission mechanisms,which are disposed on said primary shaft,, a planetary gear mechanism,which is disposed on said secondary shaft,, a low mode gear train,for coupling the input shaft,with a carrier,of the planetary gear mechanism,, and a high mode gear train,for coupling a sun gear,with an output disk,of the continuously variable transmission mechanisms,wherein said low mode gear train,is disposed on an opposite side end, with respect to the engine, of the input shaft

Toroidal continuously variable transmission

A toroidal type continuously variable transmission whose gear ratio is varied by changing the position of a trunnion is provided with double-slider valves driven by stepping motors and linear solenoid valves. The gear ratio control is performed by controlling position of the double-slider valves when the vehicle travels at speeds higher than a specified speed or by controlling directly line and relief pressures applied to the trunnion through the solenoid valves.

Control system for toroidal type continuously variable transmission

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

Hidenao Takedomi