Apparatus for controlling vehicle automatic transmission according to fuzzy set theory
US5124916A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Aug 10, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S706/90
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus for controlling a vehicle automatic transmission having a plurality of operating positions, including a determining device for determining satisfaction degress of at least one basic fuzzy set theory rule corresponding to the respective operating positions of the transmission, based on a predetermined shift pattern, a first calculating device for calculating satisfaction degrees of fuzzy set control rules, corresponding to the respective operating positions of the transmission, depending upon a detected vehicle running condition, a second calculating device for calculating overall satisfaction degrees for selecting the respective operating positions, based on the calculated satisfaction degress of the basic fuzzy set theory rule or rules and the calculated satisfaction degrees of the fuzzy set control rules, and a selector for selecting one of the positions of the transmission, based on the calculated overall satisfaction degrees, so that the automatic transmission is shifted to the selected position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.