Radio frequency plasma generating device for controlled radio frequency ignition of gaseous mixture in automobile internal combustion engine, has control device determining frequency of signal to control generating circuit

摘要

The device has ignition plug coil type plasma generating circuits (BB1-BB4) connected in parallel on an outlet of a class E power amplifier type supply circuit (2). Each generating circuit presents a resonant frequency and generates plasma when a high voltage level is applied on the outlet at a frequency equal to the resonant frequency. A control device (5) controls the supply circuit and determines the frequency of a control signal among one of a set of resonant frequencies of the generating circuits to selectively control each generating circuit along the utilized frequency. An independent claim is also included for a method for controlling the supply of a radio frequency plasma generating device.