Valves and valve actuation – Electrically actuated valve – Having element dimensionally responsive to field
Reexamination Certificate
2008-01-08
2008-01-08
Bastianelli, John (Department: 3753)
Valves and valve actuation
Electrically actuated valve
Having element dimensionally responsive to field
C251S337000
Reexamination Certificate
active
10570119
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.
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Bastianelli John
Greigg Ronald E.
Robert & Bosch GmbH
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