Oil temperature responsive hydraulic control system for an automatic transmission
US5865702A · kind A · utility
8Cited by
5References
4Claims
0Family size
Inventors
Key dates
| Filing date | Apr 4, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Apr 4, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H59/72
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil temperature responsive hydraulic control system for an automatic transmission includes a hydraulic servo for applying/releasing a frictional engagement element; a pressure regulator valve for regulating oil pressure fed to the hydraulic servo; and a signal pressure oil passage for applying a pressure regulating signal pressure to the pressure regulator valve. A control valve is arranged in the signal pressure oil passage for changing the effective diameter of the signal pressure oil passage responsive to change in oil temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.