End of valve motion detection for a spool control valve
US6866204B2 · kind B2 · utility
6Cited by
17References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2002 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | May 29, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8242
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector system (10) includes a piezoelectric sensor (52) mounted along a spool valve axis (18) of the injector body (12). The piezoelectric sensor (52) is mounted within a spool valve stop (41). As the spool valve (16) reaches the stop (41), the piezoelectric sensor (52) identifies the force exerted thereupon and transmits the generated signal to the controller (44). Through communication with piezoelectric sensor (52) the controller determines when the spool valve (16) has reached a predetermined position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.