Shift control system for automatic transmission
US5075858A · kind A · utility
7Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Jan 25, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2302/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shift control strategy is disclosed whereby a timing at which the states of shift solenoids are switched is determined based on an actual revolution speed ratio, namely a ratio of revoltion speed of an input shaft of a gear train to a revolution speed of an output shaft thereof, and a predetermined data containing various revolution speed ratio values versus kinds of shift and throttle opening degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.