Valve mechanism, especially fuel injection valve for an internal combustion engine
US7316383B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2004 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Sep 14, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection valve for an internal combustion engine, includes a valve element whose switched position depends at least indirectly on the switched state of a piezoelectric actuator that is acted on by a tubular, largely cylindrical prestressing device, which is manufactured out of a plate-shaped starting material and has at least two longitudinal edges that abut each other in such a way that the longitudinal rigidity is altered in this region. The prestressing device has at least one region whose longitudinal rigidity differs from that of a neighboring region and is situated in relation to the abutting longitudinal edges so as to reduce the bending moment that acts on the piezoelectric actuator and is generated by the altered longitudinal rigidity in the region of the abutting longitudinal edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.