Piezoelectric fuel injection system with rate shape control and method of controlling same
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United States of America Patent
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Jul 5, 2005
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N/A
app pub date -
Mar 10, 2004
filing date -
Mar 10, 2004
priority date (Note) -
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Abstract
A piezoelectric fuel injection system and a method of controlling same, the system including a piezoelectric fuel injector having a piezoelectric element, a power source adapted to provide power to the piezoelectric element to actuate the piezoelectric fuel injector, and a controller adapted to cyclically modulate power provide to the piezoelectric element by the power source during at least a portion of the injection event. The controller cyclically modulates the power between a predetermined first voltage and a predetermined second voltage that is less than the first voltage to control the rate of fuel injected by the piezoelectric fuel injector during the portion of the injection.
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