Planetary gear train of automatic transmission for vehicles
US9309951B1 · kind B1 · utility
3Cited by
22References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2014 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Dec 1, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2046
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A planetary gear train of an auto transmission for a vehicle may include an input shaft, four planetary gear sets, eight rotational shafts and six friction elements. The rotational shafts connect rotation elements of corresponding first, second, third, and/or fourth planetary gear sets, and one or more rotational shafts are directly or selectively connected to an output shaft or a transmission housing. The six friction elements selectively connect the rotational shafts and selectively connect one or more rotational shafts with the transmission housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.