Solenoid operated clutch engagement
US4560047A · kind A · utility
24Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1982 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Aug 4, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87209
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electrical solenoid operates a three-way valve having a vent port, a port connected to a source of high pressure hydraulic fluid and a port connection to a pilot valve. A check valve supplied from a source of low pressure hydraulic fluid is connected to the cylinder of a clutch or servo of an automatic transmission when a pilot valve opens this communication upon energizing the solenoid coil. The clutch cylinder is depressurized through the pilot valve to the vent port of the solenoid-operated valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.