Speed change control device and speed change control method for automatic transmission for vehicle
US7563195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2006 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Jan 19, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/425
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Since there are provided an inertia phase final period decision unit which decides whether or not the final period of the inertia phase of a speed change is currently occurring, a return control unit which, taking an affirmative result of this decision as a starting condition, performs return control in order to return from the torque down control by gradually decreasing the amount of decrease of output torque, a speed change progression decision unit which, during this return control from the torque down control, decides whether or not the speed change is progressing, and a resumption control unit which resumes the torque down control if the result of this decision is negative, accordingly, during the return control from the torque down control, by resuming the torque down control when there is no progression with the speed change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.