Drive unit for automatic transmission
US7232394B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2005 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Feb 4, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2306/52
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A drive unit for an automatic transmission has a hydraulic circuit changing device for changing a hydraulic circuit so that one of the hydraulic control portions (hydraulic gear change portions) is selectively communicated with an oil pressure source, a position detecting device for continuously detecting a position of one of moving members of the hydraulic circuit changing device and for outputting a detection signal corresponding to the position of the moving member, and a pressure regulating device provided between the hydraulic circuit changing device and the hydraulic control portions for regulating a control pressure to be applied to the hydraulic control portions. In the above drive unit, an electronic control unit calculates a rate of changes in the detection signals from the position detecting device and controls the pressure regulating device in accordance with the rate of the changes in the detection signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.