Emission control metering valve
US5265842A · kind A · utility
8Cited by
24References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Oct 1, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S251/905
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine emission control metering valve includes a metering ball valve element operatively connected to an electrically-energized linear actuator that includes a stationary magnet and a moving coil concentric with the magnet. The coil has a different axial length than the magnet such that application of a current to the coil causes coil-generated magnetic flux to axially push the coil away from the magnet. Coil movement translates into movement of the metering valve element through the wedging action of a cam element driven by the coil movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.