PLASMA IGNITION DEVICE AND PLASMA IGNITION METHOD

摘要

A plasma ignition device (20) comprising a spark plug (100), a DC power supply (210), an AC power supply (220), and a coupling section (300) is provided. The coupling section (300) includes a capacitor (320) that electrically connects the AC power supply (220) to the spark plug (100). The capacitance of the capacitor (320) is lowered more in a second ignition mode wherein the transfer of AC power is stopped than in a first ignition mode wherein the AC power is transmitted to the spark plug (100).