Planetary gear train of automatic transmission for vehicles
US8647227B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2012 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Aug 17, 2032 |
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 includes an input shaft, an output shaft, a first planetary gear set outputting a negative rotation speed by using a rotation speed input from the input shaft, a second planetary gear set converting the negative rotation speed into a positive rotation speed, a compound planetary gear set changing the rotation speed selectively input from the input shaft, the negative rotation speed and the positive rotation speed into nine forward speeds and one reverse speed, eight rotational members, and six friction members, and brakes interposed between a selected rotational member among the rotational members and a transmission housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.