Speed change control device for automatic transmission and control method thereof
US7862474B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 28, 2007 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Mar 22, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/6617
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A speed change control device for an automatic transmission according to this invention determines whether or not a request to downshift a gear position of the transmission exists during traveling in a manual speed change mode (S1, S2), and calculates an input shaft rotation speed of the transmission following a downshift based on the downshift request (S4). When it is determined that the calculated rotation speed is higher than a rotation speed limit value (S5), the speed change control device performs a downshift to a gear position at which the input shaft rotation speed of the transmission is lower than the calculated rotation speed (S6, S8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.