Manual valve for automatic transmission
US6689007B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Apr 16, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4486
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A manual valve for use within the hydraulic control system of Chrysler automatic transmissions. The present manual valve includes flow control structures to vary its standard functions. In a preferred embodiment the manual valve includes a secondary control land, which blocks and redirects hydraulic fluid to an alternate exhaust channel within the present valve when Park gear range is selected. A control orifice meters flow within the alternate exhaust channel and generates a predetermined backpressure to the pressure regulator valve, which provides an increased flow of hydraulic fluid to the torque converter in the Park gear range. This effectively eliminates delayed engagement of the transmission upon shifting into the Drive and Reverse gear ranges. In addition, the present manual valve includes a reverse metering land, which regulates the effect of fluid shock on the reverse servo piston when the Reverse gear range is selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.