Clutch control device of infinite variable speed ratio transmission
US6358179B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2000 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Jun 13, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1204
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An output shaft (4) of a continuously variable transmission (2) is joined to a sun gear (5A) of a planetary gear mechanism (5), and joined to a final output shaft (6) via a direct mode clutch (10). An output shaft (3C) of a fixed speed ratio transmission (3) is joined to a planet carrier (5B) of the planetary gear mechanism (5) via a power recirculation mode clutch (9). Oil pressure supply to the direct mode clutch (10) and power recirculation mode clutch (9) is controlled by a controller (80) via a mode fixing valve (160). A cam (280) which moves in synchronism with a trunnion (23) of the continuously variable transmission (2) locks the mode fixing valve (160) in a position which shuts off oil supply to one of the clutches (9), (10) when the speed ratio of a continuously variable transmission (2) is smaller than a predetermined value lcC, and releases the lock when the speed ratio of the continuously variable transmission (2) is larger than the predetermined value lcC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.