Control installation for automatically shifted planetary gear change-speed transmissions
US3983766A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1974 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Jun 21, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2716/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control installation for shifting back an automatically shifted planetary gear change-speed transmission in which the various speeds are adapted to be engaged by servo-devices that are actuated by a pressure medium whereby the servo-device of the speed to be engaged is brought into readiness and is fully engaged only after the determination of the correct shifting point by means of at least one feeler device as a function of the latter; a solenoid valve is coordinated to the pressure line leading to the actuating member of the servo device and is adapted to be shifted by means of a shifting pulse into a position releasing the pressure to the actuating member of the servo-device whereby the shifting pulse is triggered by at least one rotational speed transmitter which detects the rotational speed condition of a corresponding transmission member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.