Patent ID: 8387446
Filing Date: 2013-03-05
Classification: F02P

Abstract:
1. A measuring device, comprising: at least one resonator having a resonance frequency of more than 1 MHz, the resonator comprising two electrodes configured to generate a spark during an ignition command; a first circuit that supplies a microwave ignition, comprising a transformer, a secondary winding of which is connected to the resonator; a measurement capacitor, connected in series between the secondary winding and the resonator; a second circuit that measures ionization current of gases in combustion in a cylinder of an internal combustion engine associated with the resonator, the second circuit being connected to terminals of the measurement capacitor; and a third circuit that measures the voltage at the terminals of the measurement capacitor, the voltage at the terminals of the measurement capacitor being proportional to the voltage at terminals of the electrodes of the resonator during an ignition command, and the third circuit comprises a circuit for rectifying a peak voltage at the terminals of the measurement capacitor.