Automatic power transmission with direct-drive clutch
US4160392A · kind A · utility
2Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1977 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Feb 18, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2045/0284
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In an automatic power transmission including hydrodynamic torque transmitting means such as a torque converter or a fluid coupling and fluid-operated direct-drive clutch means combined with the torque converter or fluid coupling, control valve means is provided so that the direct-drive condition is achieved from the top-gear condition at a retarded timing after the top gear has been attained under low-load conditions of the engine although direct-drive condition is established simultaneously when an upshift is made to the top gear under high-load operating conditions of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.