Automatic shift-down apparatus for automatic transmission
US6530291B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2000 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Dec 3, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1926
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An automatic shift-down apparatus for an automatic transmission which comprises vehicle speed detection device for detecting the speed of a vehicle; vehicle-speed variation rate calculation device for calculating the variation rate of the detected vehicle speed; shift-start vehicle speed calculation device for calculating, on the basis of the calculated vehicle-speed variation rate and a time required to complete a shift operation, a shift-start vehicle speed which enables the shift operation to finish before the vehicle speed attains a shift-completion speed; and a shift device which starts a shift operation when the detected vehicle speed attains the calculated shift-start vehicle speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.