Electrical transmission range shift system with non-continuous duty solenoid valve
US6357311B1 · kind B1 · utility
1Cited by
17References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 10, 2000 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Feb 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19251
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vehicle transmission assembly includes a main gear box and an auxiliary gear box assembly, such as a range gear box. The range gearbox is shifted by an Electric Over Air (EOA) system that includes an air supply, a controller and a single solenoid. The solenoid valve is selectively operated by the controller which includes a timer function. When the driver actuates the range switch, the solenoid valve is energized for a predetermined period of time until the shift has been accomplished. Upon completion of the shift, the controller deenergizes the solenoid valve which then returns to a neutral condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.