Continuously variable ratio transmission assembly and method of control of same
US8989970B2 · kind B2 · utility
1Cited by
28References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2004 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Sep 19, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/664
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There is disclosed a continuously variable ratio transmission assembly (“variator”) comprising a roller which transmits drive between a pair of races, the roller being movable in accordance with changes in variator ratio, a hydraulic actuator which applies a biasing force to the roller, at least one valve connected to the actuator through a hydraulic line to control pressure applied to the actuator and so to control the biasing force, and an electronic control which determines the required biasing force and sets the valve accordingly, wherein the valve setting is additionally dependent upon a rate of flow in the hydraulic line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.