Multi-speed transmission with differential gear set and countershaft gearing
US7311630B2 · kind B2 · utility
18Cited by
9References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 2005 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Jun 8, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19233
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission is provided having a differential gear set with three input torque-transmitting mechanisms, such as friction clutches, to achieve torque flow through the differential gear set to a countershaft gearing arrangement. The transmission utilizes power-on shifts. By utilizing the torque ratio of the differential gear set, additional forward ratios are available with good step progression, reducing the number of countershaft gear sets and synchronizers necessary in comparison to a dual-clutch transmission providing the same number of ratios. A shorter axial length is thus attainable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.