Fail-safe solenoid valve apparatus for controlling oil pressure for vehicular automatic transmission
US5205192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1992 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | May 28, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19251
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus for controlling an oil pressure for a vehicular automatic transmission has an accumulator connected to an oil passage which is in communication with each of clutches for transmission or speed changing; a regulator valve for regulating an oil pressure to be supplied to the hydraulic clutches; a first pressure control valve of electromagnetic type for controlling an output oil pressure of the regulator valve by causing an oil pressure to act thereupon; and a second pressure control valve of electromagnetic type for controlling a back pressure of the accumulator. A drain port of one of the first and second pressure control valves is connected to an oil passage on an output side of the other of the pressure control valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.