Adaptive correction of inappropriate shift in automatic transmission
US5241477A · kind A · utility
9Cited by
11References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1992 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0087
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An adaptive correction of an inappropriate shift operation is disclosed. During a power-off upshift, a variation in output torque of the transmission output shaft is detected. A decision is made based on this output torque variation whether or not the power-off 1-2 upshift has been effected in a predetermined appropriate manner, and a timing at which an on-coming friction device to be engaged during the power-off upshift is corrected based on the decision made. Thus, the shift operation during the next occurrence of a power-off upshift of the same type is effected in the appropriate manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.