Control system for an automatic transmission having multiple default modes
US8210976B2 · kind B2 · utility
5Cited by
4References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2009 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Oct 10, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87096
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control system for a automatic transmission includes a plurality of solenoids and valves in fluid communication with a plurality of shift actuators. The shift actuators are operable to actuate a plurality of torque transmitting devices. Selective activation of combinations of the solenoids allows for a pressurized fluid to activate at least one of the shift actuators. The solenoids are configured to provide a forward gear ratio and a reverse gear ratio when the solenoids are deengerized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.