Control system for automatic transmission
US4885960A · kind A · utility
8Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1988 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Aug 31, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H59/44
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A creep phenomenon of an automotive vehicle is prevented by an arrangement which is provided with an anti-creep mode which is operative to change the gear automatically to a speed range having a relatively low speed reduction ratio when the vehicle is at rest. A double engagement within the transmission and resulting oscillations which would occur when a special operation is performed is prevented. At this end, a time delay is provided before shifting to the anti-creep mode when the vehicle is at rest and the throttle valve opening of an engine is equal to or less than a given value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.