| 摘要 |
The invention relates to a radiofrequency ignition device for an internal combustion engine, comprising: a supply circuit (2), comprising a transformer (T), a secondary winding (LN) of which is connected to a resonator (1) comprising two electrodes which are able to generate a spark so as to initiate combustion in a cylinder of the engine upon an ignition command, a measurement capacitor (CMES), connected in series between the secondary winding of the transformer and the resonator, and - a measurement circuit (10) for measuring the ionization current (IION) of the combustion gases, connected to said measurement capacitor and comprising a voltage generator with low input impedance, able to provide a polarization voltage (VPOLAR) of the measurement capacitor so as to generate the ionization current, first means (M1, RA, RB) for amplifying the ionization current and means (RS) for measuring a voltage (VS) representative of the amplified ionization current and connected at the output of the first amplifying means. |
