Shift control system and method for automatic transmission, including engagement time lag control
US5195036A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 5, 1990 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Sep 5, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S477/908
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shift control system for an automatic transmission including a first transmission assembly for changing gear ratios in accordance with the release or engagement of a first frictional engagement system and a second transmission assembly connected in series to the first transmission assembly for changing gear ratios in accordance with the engagement or release of a second frictional engagement system. It includes a decision system for deciding whether or not the automatic transmission should execute the gear changes and a time lag controller for making the time lag for the second frictional engagement system to be engaged shorter than the time lag for the second frictional engagement system to be engaged for another gear change when the automatic transmission is to execute the gear changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.