Piezo actuator with improved electrical contacting and employment of such a piezo actuator
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United States of America Patent
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Oct 23, 2001
Grant Date -
N/A
app pub date -
Aug 6, 1999
filing date -
Aug 6, 1998
priority date (Note) -
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Abstract
A piezo actuator (1) is disclosed that has a contact lug (20, 21) for the electrical contacting of an electrode (14, 15) of an actuator member (11). Due to an expansion and contraction of the actuator member, a mechanical stress occurs in the contact lug that is minimized in that the contact lug has a device for adapting the expanse to a dimension of the expansion and contraction. The device is, for example, a deformation material in the form of a wire weave. The piezo actuator is utilized for the drive of an injection valve in an internal combustion engine.
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