Shift controller for automatic transmission
US8332107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2009 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Nov 24, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0213
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shift controller for an automatic transmission capable of automatically shifting up in a manual mode is provided. In the shift controller, a hysteresis between an automatic upshift line and a downshift permission line is set to be smaller as the accelerator opening degree decreases. As a result, when the accelerator opening degree is larger and therefore hunting is more likely to occur, it is possible to avoid an excessively small time interval between a downshift and an upshift. On the other hand, when the accelerator opening degree is smaller and therefore hunting is less likely to occur, a manual downshift permission region can be expanded to a higher rotational speed region, whereby a driver's manual downshift request can be satisfied in a higher vehicle speed region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.