Geartrain for a five-speed automatic transmission
US5944629A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Dec 29, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/0047
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A geartrain for a five-speed automatic transmission includes a first compound planetary gear unit comprising first and second simple planetary gearsets having first, second and third operating elements, the first operating element acting as an input element and a second compound planetary gear unit comprising third and fourth simple planetary gearsets having fifth, sixth, seventh and eighth operating elements. The fifth operating element acts as an output element. The sixth operating element is variably connected to either the first operating element or the second operating element, and the eighth operating element is fixedly connected to the third operating element. Clutches for variably connecting the sixth operating element to either the first operating element or the second operating element are provided. Brakes for selectively connecting at least one of the operating elements of the first and second planetary gear units to a transmission housing are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.