Corona ignition system and method for controlling a corona ignition device
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United States of America Patent
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Sep 13, 2016
Grant Date -
Feb 12, 2015
app pub date -
Aug 6, 2014
filing date -
Aug 12, 2013
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Abstract
A corona ignition system that can be operated with relatively low expenditure in the vicinity of its resonant frequency. For each ignition, impedance and frequency values are stored in a data structure and are allocated to a respective voltage value. The data structure is complemented by an adjustment variable whose value specifies whether the present frequency value of the present engine cycle has been classified as too high or too low. The value of the adjustment variable is determined anew in each engine cycle. To that end, a comparison is made between a present frequency value with an earlier frequency value and a present impedance value with an earlier impedance value. Based upon the comparison, a value can be assigned to the adjustment value to cause a lower or higher frequency value of the corona discharge in the next cycle.
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