Output-split and compound-split infinitely variable transmission
US6964627B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2003 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Mar 21, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission includes two planetary units (U1, U2) and two variators (V1, V2), all connected together such that power can be transferred between an input (I) and an output (O) in a compound-split mode or an output-split mode. In the compound-split mode the two planetary units are joined together at two connections, creating two compound member branches and two single member branches. Except when the transmission operates at its nodes, power transfers through a mechanical path and also through a variator path located in part between the two variators, one of which functions as a motor and the other as the source of power for the motor. At the nodes all power transfers through the mechanical path and the transmission has its greatest efficiency. In the output-split mode, which exists at an output speed below that identified with the first node, one of the compound member branches is interrupted so that the two planetary units are only coupled at one of the compound member branches. In this mode some of the power transfers through the first planetary unit, and some transfers through the variators and the second planetary unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.