Planetary gear train of automatic transmission for vehicles
US8986153B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2012 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Apr 2, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2097
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A planetary gear train of an automatic transmission may include a first planetary gear set outputting a negative rotation speed by using a rotation speed selectively input from the input shaft, a second planetary gear set outputting a reduced rotation speed by using the rotation speed selectively input from the input shaft or to selectively become a direct-coupling state together with the first planetary gear set, a compound planetary gear set having four rotation elements by combining third and fourth planetary gear sets, seven rotational members including two rotation elements connected to each other or one rotation element among the rotation elements of the first and second planetary gear sets and the compound planetary gear set, and six friction members including clutches, and brakes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.