Method for eliminating instability in a vehicle automatic transmission which constantly shifts from one speed ratio to the higher ratio and conversely
US6044317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1998 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Apr 27, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0216
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The method for eliminating an oscillation phenomenon in a motor vehicle with an automatic transmission system. The mass of the vehicle is determined on the basis of the measured speed, the current ratio of the transmission, the engine speed and the opening angle of the engine throttle. The acceleration of the vehicle and a higher ratio is predicted from the mass of the vehicle. The total amount of tractive resistance applied to the vehicle is determined. The probability that there will be an oscillation phenomenon at a higher ratio termed "oscillation risk" is determined from the acceleration and tractive resistance information. A signal for preventing shifting to the higher ratio is generated from the oscillation risk information, with the signal being adapted to be applied to a transmission control device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.