Boost valve assembly
US6832632B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2003 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Jan 23, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8663
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A direct replacement boost valve assembly for use in combination with a pressure regulator valve within the valve body of an automatic transmission is disclosed. The boost valve assembly functions to boost line pressure during high load conditions in response to torque signal fluid pressure, which is proportional to engine torque. The present boost valve assembly is comprised of hard-anodized aluminum valve pistons, which are disposed within a wear resistant aluminum sleeve for maximum service longevity. Annular lubrication grooves formed in the valve pistons which comprise the boost valve assembly retain a lubricating film of transmission fluid to center the valve pistons within the sleeve ensuring accurate operation and reducing mechanical wear. The present valve sleeve features a fluid inlet port system, which increases the delivery of torque signal fluid pressure to the boost valve in order to restore its function to original factory boost ratios and specifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.