Control device for automatic transmission of vehicle
US8515631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2010 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Sep 14, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0232
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A driving force margin of a vehicle is calculated on the basis of an engine load, vehicle speed, travel resistance and estimated uphill gradient. A gear is determined on the basis of predetermined gear shifting characteristics at least from the vehicle speed and the engine load in an automatic shift mode. Automatic down shift is generated in the case where the vehicle speed becomes lower than vehicle speed on an automatic down shift vehicle speed table set up in accordance with the gear when the operation is switched from the automatic shift mode to a manual shift mode. The automatic down shift vehicle speed table is corrected so as to shift an automatic down shift line to a high vehicle speed side or low vehicle speed side in accordance with the magnitude of the calculated driving force margin of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.