Pressure assisted park servo
US8012063B2 · kind B2 · utility
3Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2008 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Apr 10, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19251
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure assisted park servo assembly for an automatic transmission includes a servo or spool valve which receives pressurized hydraulic fluid from various sources including two solenoid valves and transmission ports. The servo valve controls two flows of pressurized hydraulic fluid to a servo assembly to place the transmission in or release it from park. The improved park servo assembly exhibits enhanced operating speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.