Control system for automatic transmission
US4748870A · kind A · utility
13Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1986 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Sep 4, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/0437
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system is proposed that electro-hydraulically develops a servo actuating fluid pressure that momentarily drops to prevent an increase in frictional transmission torque of a friction element which otherwise would be caused by an increase in dynamic frictional coefficient between a driving and a driven member of the friction element as the relative rotation of them decreases toward zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.