System for controlling servo activating hydraulic pressure occurring in vehicular power train
US4939956A · kind A · utility
8Cited by
10References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1988 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Aug 9, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/067
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
According to the present invention, in order to effect a shockless shift in an automatic transmission of a vehicular power train, a servo activating hydraulic fluid pressure applied to a shifting friction unit is controlled in response to a predetermined variable other than an engine throttle opening which causes a change in engine output torque from a predetermined pattern of variation of the engine output torque against variation of the engine throttle opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.