Family of multi-speed dual-clutch transmissions having four planetary gear sets and four brakes
US6767307B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2003 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Jan 19, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2012
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least six forward speed ratios and one reverse speed ratio. The transmission family members include four planetary gear sets, two input clutches, eight torque transmitting mechanisms, and three fixed interconnections. The invention provides a low content multi-speed dual clutch transmission mechanism wherein the two input clutches alternately connect the engine to realize odd and even number speed ratio ranges. The eight torque transmitting mechanisms provide connections between various gear members, the fixed interconnections, the input clutches, the output shaft, and the transmission housing, and are operated in combinations of three to establish at least six forward speed ratios and at least one reverse speed ratio. One of the torque transmitting mechanisms may be eliminated to provide at least five forward speed ratios and at least one reverse speed ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.