Continuously variable dual mode transmission
US7473202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2006 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Dec 20, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2300/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A dual mode continuously variable transmission for use with motor vehicles includes a transmission input shaft, a transmission output shaft, and a variator disposed between the transmission input shaft and the transmission output shaft. A mixer gear set is operably disposed between the transmission input shaft and the variator output shaft. A clutching element is operably disposed between the input shaft the mixer gear set. The variator is configured to continuously vary a ratio of input torque to output torque between the variator shafts responsive to commands from an electronic control unit. The variator input shaft is drivingly connected to the input shaft and the variator output shaft is drivingly connected to the output shaft. The clutching element selectively connects and disconnects the input shaft and the mixer gear set to operate the transmission in a power splitting mode of operation and a variator only mode of operation. An electronic control unit incorporates logic rules by which the clutching element maintains the transmission in a variator-only mode of operation in a first vehicle speed range, and maintains the transmission in a power splitting mode of operation in a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.