Patent Number: 6,251,038

Title: Continuously variable transmission unit

Abstract: A continuously variable transmission unit, which combines a toroidal-type continuously variable transmission of the double-cavity type and an epicyclic train, comprises a low-speed clutch and a high-speed clutch. In a low-speed drive mode, the low-speed clutch is connected to allow all torque to be transmitted to an output shaft through the toroidal-type continuously variable transmission. In a high-speed drive mode, the high-speed clutch is connected to allow most of torque to be transmitted to the output shaft through an epicyclic train and some of the torque to be applied to output discs of the toroidal-type transmission. The combination of the transmission and the epicyclic train serve to improve the transfer efficiency and durability of the continuously variable transmission unit.

Inventors: Ishikawa; Kouji (Fujisawa, JP), Imanishi; Takashi (Yokohama, JP)

Assignee: NSK Ltd.

International Classification: F16H 37/06 (20060101); F16H 37/08 (20060101); F16H 037/02 ()

Expiration Date: 06/26/2018