Gear train of automatic transmission for vehicles
US8328678B2 · kind B2 · utility
79Cited by
4References
6Claims
0Family size
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Key dates
| Filing date | Dec 1, 2010 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Jul 7, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2046
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gear train of an automatic transmission realizes at least ten forward speeds and one reverse speed by combining four simple planetary gear sets with four clutches and two brakes and three friction elements are operated at each shift-speed such that the gear train has advantages of simplifying structures of the automatic transmission and improving power delivery performance and fuel economy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.