Patent ID: 6982516
Filing Date: 2006-01-03
Classification: F02D,H02N

Abstract:
1. An apparatus for charging a piezoelectric element ( 10 , 20 , 30 , 40 , 50 or 60 ), characterized in that an activation voltage and an activation charge value for driving the piezoelectric element ( 10 , 20 , 30 , 40 , 50 or 60 ) is controlled online by a control unit (D) which: (a) adjusts the activation voltage (U) and activation charge values in order to compensate for deviations caused by variations in the piezoelectric element's ( 10 , 20 , 30 , 40 , 50 or 60 ) layer thickness or the number of layers; and (b) determines the activation voltage and the activation charge value as a function of a correction factor, the correction factor measured in accordance with a manufacturing process.