Hydraulic controller for an automatic transmission
US6739998B2 · kind B2 · utility
6Cited by
3References
4Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 25, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Nov 25, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/6608
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
When an SLT pressure of a linear solenoid valve is input into a control oil chamber of a garage shift control valve, and a direct control pressure from the garage shift control valve is output to a clutch or a brake, a hydraulic controller inputs the direct control pressure into a control oil chamber and executes feedback-control. Also, when a range pressure of a clutch modulator valve is output to the clutch or the brake by switching the garage shift valve, the hydraulic controller inputs the range pressure, which is higher than the SLT pressure, into the control oil chamber and fixes the garage shift control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.