Power transmission with friction launch torque transmitting mechanism in forward and reverse
US6471616B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Feb 16, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/201
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A powertrain includes a power transmission having an input shaft continuously connected directly between an engine and a planetary gear member of a first planetary gear set. Another member of the planetary gear set is selectively grounded by a torque transmitting mechanism to establish a reaction member during the launch of a vehicle incorporating the powertrain. The reaction member is established during both the lowest forward drive ratio and the reverse drive ratio. A third member of the planetary gear set transmits the torque from the input shaft, as modified by the planetary gear set, to other planetary gear sets in down stream power flow arrangement with the first planetary gear set. The torque transmitting mechanism grounding the reaction member of the first planetary gear set is preferably a brake having two half bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.