Controls for four-forward-speed automatic transmissions
US3943799A · kind A · utility
30Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1975 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | Feb 19, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/026
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Controls for automatic transmissions of the four-forward-speed type having two shift valves equipped with solenoid valves in a hydraulic system, and a manual valve for changing over the fluid passages or lines in the reverse and forward speed regions. The automatically controlled shift positions in the first to fourth speed ranges in the forward speed region and the shift positions to be assumed by restricting the shift range by manual operation are attained by means of the two solenoid valves in response to signals from an electric control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.