Automatic transmission control device and method of controlling automatic transmission
US7987956B2 · kind B2 · utility
0Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 5, 2008 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Feb 6, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/725
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission ECU calculates a differential rotation, which is the rotational speed difference between a friction plate and a separator plate, when it is determined that a second brake is not engaged. If it is determined that the differential rotation is equal to or above a predetermined value, the transmission ECU narrows the pack clearance of the second brake. If it is determined that the differential rotation is less than the predetermined value, the transmission ECU widens the pack clearance of the second brake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.