Line pressure control for automatic transmission
US5005441A · kind A · utility
19Cited by
9References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Apr 17, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0255
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An automatic transmission is disclosed wherein an accumulator back-up pressure is variable in response to engine load and also to the progress of a shift taking place. A line pressure solenoid is provided which controls a signal pressure supplied to an accumulator control valve which generates the accumulator back-up valve supplied to an accumulator that is arranged to soften an increase in servo activating hydraulic fluid pressure supplied to a frictional device during the shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.