Adaptive control system for automatic transmission
US3956947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Jun 14, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S477/904
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system for an automatic transmission of the type having an input shaft assembly, an output shaft assembly, a plurality of power transmitting gear assemblies connecting the input shaft assembly and output shaft assembly and adapted to be coupled to provide various ratios between input and output shaft assembly rotation, engaging devices for effecting changes in the ratios provided by the power transmitting gear assemblies, and servos for operating the engaging devices. Pressure regulating devices are provided for controlling the application of pressurized fluid to the servo means, and control apparatus is provided which is responsive to the rate of change of rotational speed, i.e., acceleration, of at least one of the rotatable components of the assemblies to control the output torque of the transmission during a shift from one ratio to another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.