Automatic transmission hot mode management
US5857162A · kind A · utility
22Cited by
14References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/143
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A multi-ratio automatic transmission has a plurality of fluid operated clutching devices, a fluidic torque converter and a fluid operated torque converter clutch mechanism. During certain operational periods, a hot mode is invoked to eliminate certain heat sources and increase heat dissipation to thereby prevent the fluid temperature from exceeding a predetermined maximum temperature. The hot mode is invoked as a function of both the temperature of the transmission fluid and the rate of change of the fluid temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.