Electronic adaptive swap-shift control for an automatic transmission for automotive vehicles
US7527578B2 · kind B2 · utility
5Cited by
21References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2007 |
| Grant date | May 5, 2009 |
| Priority date | — |
| Expiry date | Oct 8, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/085
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system and control method for a swap-shift transmission having auxiliary and main gearsets wherein precise synchronization control of ratio changes of each gearset at the start and at the end of a swap-upshift progression is achieved using an adaptive control to adjust friction element pressure values and slip times for friction elements of each gearset, whereby shift synchronization is achieved throughout the operating life of the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.