Control apparatus of automatic transmission for vehicle and control method of automatic transmission for vehicle
US6169949A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Apr 7, 1999 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Apr 7, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/142
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a vehicle having a continuously variable transmission, a road surface gradient estimation block for calculating a road surface gradient and a target vehicle speed value decision block for deciding a vehicle speed according to the road surface gradient are provided. During a vehicle running, when the road surface gradient becomes larger than a stored judgment value, a target vehicle speed is prepared in accordance with a vehicle speed at a time a road gradient value exceeds over an establishment value, a transmission ratio is controlled to have the target speed. Accordingly, a drive force in response to the road surface gradient can be carried out without a change-over of a transmission mode by a driver himself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.