Transmission control system for multi-ratio gear arrangement
US4350058A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1980 |
| Grant date | Sep 21, 1982 |
| Priority date | — |
| Expiry date | Nov 10, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0078
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The disclosed control system regulates changes of gear ratio in an automatic transmission for a vehicle. A supervisory control arrangement monitors operator input commands through the shift range selector lever, and receives a desired-ratio command either from a shift point computer or from a manual gear shift selector. When the supervisory control arrangement determines that the desired-ratio signal differs from the actual ratio, the monitoring function is interrupted and a shift-initiate command is provided. This command is utilized to assign certain components for use in a shift quality control arrangement, for effecting the controlled ratio change. A torque output signal from the vehicle drive line is used in conjunction with the shift quality control arrangement. After the shift is completed, the previously assigned components are released and the supervisory control arrangement resumes the monitoring of the desired ratio as contrasted to the actual gear ratio. One circuit controls all the upshifts, whether 1-2, 2-3, or 3-4, and one other circuit controls all the downshifts. This assignment of certain components for each controlled ratio change, and their release so they can b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.