Gear shifting engagement shock control system
US4224842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1978 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Apr 26, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0437
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
To control shifting shock upon starting of a stopped vehicle with an automatic transmission and when shifting from neutral into a drive gear (first, or reverse), a signal representative of transmission input speed (therefore equally representative of engine output speed) is used, twice differentiated, to control a shift-shock control system when shifting between neutral and a drive gear. When the vehicle is moving above a predetermined speed, e.g. 7 km/h, the automatic shock control system is controlled by a twice differentiated signal derived from the output of the transmission and when shifting is to be commanded between first and second, and second and third (or other gears), respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.