System for and method of controlling shifting in gear position in automatic transmission
US5022286A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Apr 11, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H59/54
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An automatic transmission with a downshift control is disclosed. Upon deceleration, the downshift is effected to cause engine brake running with downshifted state to take place. When the driver depresses an accelertator pedal to open the engine throttle, i.e., a power demand, the engine brake running with downshifted state is to be released but with a predetermined delay time. More specifically, the engine brake running with downshifted state is released upon expiration of the predetermined delay time after the power demand has been detected. In the second embodiment, the release timing is more precisely controlled such that the delayed release becomes moot when the power demand disappears, so that the downshifted state is immediately released when the accelerator pedal is released after it has been depressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.