Automatic transmission control decice
US10641386B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2016 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Oct 21, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2312/022
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In an automatic transmission control device of the invention configured to start an increase in engagement pressure of a start-up engagement element, when a determination threshold value for determining that a turbine rotational speed has reduced is reached or exceeded, the determination threshold value when a selection operation from a non-traveling range to a traveling range is made before a prescribed period of time from starting of an engine has elapsed, is increased and set greater than the determination threshold value when the selection operation is made after the prescribed period of time has elapsed. Accordingly, a reduction in the turbine rotational speed can be accurately determined, and thus it is possible to suppress torque fluctuations, occurring owing to engagement of a second brake, which is the start-up engagement element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.