Planetary gear train of automatic transmission for vehicle
US8992371B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2013 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Dec 30, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2082
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A planetary gear train of an automatic transmission for a vehicle include: an input shaft; an output shaft; a first compound planetary gear set combining first and second planetary gear sets and firstly changing torque input through one input path and two variable input paths into six speeds; a second compound planetary gear set combining third and fourth planetary gear sets, secondly changing the six speeds a rotation speed of the input shaft input through one variable input path into eleven forward speeds and reverse speed, and finally outputting the changed rotation speed; and friction members including clutches interposed between two rotation shafts or between a rotation shaft and the input shaft, and brakes interposed between a rotation shaft and a transmission housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.