Method and arrangement for actuating an automatic transmission
US5501644A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 1994 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Sep 1, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention is directed to an arrangement for actuating an automatic transmission of a motor vehicle which is equipped with a drive unit wherein fuel is consumed. The transmission ratios are then so adjusted that the drive unit is driven in its operating range wherein consumption is optimal. The adjustment of the transmission ratio takes place in dependence upon at least a first signal (nab) representing the transmission output rpm and/or the engine rpm and/or the transmission input rpm. Furthermore, the adjustment of the transmission ratio is dependent upon a second signal (moab) which represents a desired value for the torque outputted by the transmission. The adjustment of the transmission ratio then takes place with the aid of a comparison of the first signal and/or the second signal to at least one threshold value (moabstst). According to the invention, the one threshold value is at least dependent upon parameters which influence the maximum torque to be outputted by the drive unit to the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.