Hydraulic and electronic control system for an automatic transmission
US4616531A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 14, 1984 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | Mar 14, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0485
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system for an automatic transmission equipped with a plurality of friction engaging devices for attaining a plurality of shift ranges by locking the elements of a gear mechanism, which is disposed between an input shaft and an output shaft, to a case, by bringing the elements into and out of engagement with the input shaft or output shaft, or into and out of engagement with each other, said friction engaging devices including a first friction engaging device (C2) which takes part in achieving a reverse shift, and a second friction engaging device (B2) which participates in achieving parking and reverse the control system includes an electronic control circuit means which controls the timing of the actuation of the first and second friction engaging devices upon shifting from parking to reverse range so as to mitigating shock upon gear shifting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.