Hybrid electrically variable transmission with dual power paths and selective motor connection
US7479081B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2006 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Jul 24, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electrically variable transmission having two motor/generators provides power-split, electrically variable power flow along dual power paths and provides multiple operating modes, including an electrically variable input-split mode. The transmission also includes a differential gear set having five gear elements. A first of the motor/generators is continuously connected to one of the gear elements and a second of the motor/generators is separately selectively connectable to two of the other gear elements. When the second motor/generator is connected to both of the gear elements, a fixed speed ratio can be established; thus, no lock-up clutch is necessary to achieve a fixed speed ratio through the differential gear set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.