DEVICE FOR MEASURING THE IONIZATION CURRENT IN A RADIO FREQUENCY IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Oct 21, 2010
app pub date -
Oct 1, 2008
filing date -
Nov 5, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A radiofrequency ignition device for an internal combustion engine, including: a supply circuit, including a transformer, a secondary winding of which is connected to a resonator including two electrodes configured to generate a spark so as to initiate combustion in a cylinder of the engine upon an ignition command, a measurement capacitor, connected in series between the secondary winding of the transformer and the resonator, and a measurement circuit measuring ionization current of the combustion gases, connected to the measurement capacitor and including a voltage generator with low input impedance, to provide a polarization voltage of the measurement capacitor so as to generate the ionization current, a first amplifier amplifying the ionization current and a measuring mechanism measuring a voltage representative of the amplified ionization current and connected at an output of the first amplifier.
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