Valve for controlling fluids
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United States of America Patent
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-
Aug 17, 2004
Grant Date -
N/A
app pub date -
May 29, 2002
filing date -
Aug 20, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve for controlling fluids is proposed that for its actuation cooperates with a piezoelectric actuator (2). To compensate for changes in the length of the piezoelectric actuator (2) in the stroke direction that are caused by temperature changes, a compensation element (7) is provided, which comprises a material that has a coefficient of thermal expansion that is approximately equivalent to that of the piezoelectric actuator (2). The piezoelectric actuator (2) and compensation element (7), upon a certain temperature change, exhibit a comparable change in their length in the stroke direction. As a result, the change in length of the piezoelectric actuator with the temperature is compensated for. The valve is intended for use in fuel injection devices for internal combustion engines.
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