METHOD FOR KNOCK DETECTION
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United States of America Patent
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Issued Date -
Dec 5, 2013
app pub date -
May 10, 2013
filing date -
May 30, 2012
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Abstract
A method for knock detection in an internal combustion engine in which a fuel/air mixture is ignited by means of a corona discharge. To generate the corona discharge, an electrical resonant circuit is excited, in which an ignition electrode that is electrically insulated with respect to combustion chamber walls constitutes a capacitor together with the combustion chamber walls. For knock detection, an electrical variable of the resonant circuit is measured and the course thereof is evaluated. The course of the electrical variable is checked to determine whether it has a local extremum after the start of the fuel combustion.
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