Electronically-controlled, adaptive automatic transmission system
US5115698A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1989 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Aug 9, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0087
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention is a hydraulic system for an automatic transmission having a torque converter for receiving power from a prime mover, and an assembly of hydraulically operated friction elements which provide clutch and brake functions. The hydraulic system includes a pump, a regulator valve, and a torque converter control valve for regulating fluid pressure to the torque converter. The hydraulic system also includes a manual valve and a plurality of solenoid valves for controlling fluid flow received at least in part from the manual valve to each of the friction elements. The hydraulic system further includes a switch valve operatively associated with the solenoid valve for enabling two of the friction elements to be controlled from only one of the solenoid valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.