Toroidal continuously variable transmission
US8727937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2009 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Jun 10, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A toroidal continuously variable transmission includes: an input disk; an output disk; a plurality of power rollers; a plurality of trunnions; an oil pump; a pressing hydraulic mechanism that moves and brings the input disk and output disk closer to each other; a shifting hydraulic mechanism that moves the trunnions forward and rearward; and a hydraulic control device that controls the pressing hydraulic mechanism and the shifting hydraulic mechanism by oil pressure. The hydraulic control device has an oil pressure regulation unit that sets an oil pressure in a shifting hydraulic line that is a hydraulic source of the shifting hydraulic mechanism to an oil pressure at which shifting control can be performed by the shifting hydraulic mechanism till the transmission of power between the input disk and output disk is interrupted when the operation of the oil pump is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.