IGNITION APPARATUS, IGNITION PLUG, AND ENGINE USING SAID APPARATUS AND PLUG

摘要

An engine ignition system and the like are provided, which reduce a required voltage and improve an ignition performance without any special electrical configuration. An ignition system 3 is configured so that: to an auxiliary electrode 13 is applied a voltage that is not more than a voltage applied between a center electrode 11 and a ground electrode 12 and that generates no spark discharge; the auxiliary electrode 13 is positioned so that an electric field Ef2 between the auxiliary electrode 13 and the ground electrode 12 or an electric field Ef3 between the auxiliary electrode 13 and the center electrode 11, which is generated by the applied voltage, is spread over the gap. A time for applying the voltage to the auxiliary electrode 13 is controlled to include a time for applying the voltage between the center electrode 11 and the ground electrode 12.