Actuating unit for a piezo-electrically controlled fuel...

Details Actuating unit for a piezo-electrically controlled fuel... Actuating unit for a piezo-electrically controlled fuel...

2004-03-19

2008-03-04

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S328000

Reexamination Certificate

active

07339308

ABSTRACT:
An actuator unit which is suitable for actuating a fuel injection valve of an injection system for internal combustion engines includes a piezoelectric actuator and a hollow body embodied as a spring. The service life of the actuator unit can be improved by designing the hollow body to eliminate or minimize bending stresses on the piezoelectric actuator.

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