Fluid pressure control system for a hydraulic transmission with a lock-up clutch
US4051932A · kind A · utility
32Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1975 |
| Grant date | Oct 4, 1977 |
| Priority date | — |
| Expiry date | Nov 21, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid pressure control system for a hydraulic transmission with a lock-up clutch including a lock-up clutch control valve which selectively supplies oil pressure for actuating the lock-up clutch. The lock-up clutch control valve being controlled by selective application of one of a plurality of servo fluid pressures for operating friction engaging means of a gear transmission, said selection of the servo fluid pressures being effected by a change-over valve composite in a changing-over manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.