IGNITION DEVICE FOR SPARK-IGNITION INTERNAL COMBUSTION ENGINE

摘要

The present invention achieves improved fuel efficiency by providing a configuration such that plasma produced at the time of ignition diffuses into the entire combustion chamber in a spark-ignition internal combustion engine. An ignition device for a spark-ignition internal combustion engine is provided with an ignition plug, and a transmitting antenna which is provided near the ignition plug and transmits an electric wave into a combustion chamber, and generates plasma by reacting a spark discharge generated between a center electrode and a ground electrode of the ignition plug and an electric field generated in the combustion chamber via the transmitting antenna with each other to thereby ignite an air-fuel mixture. A receiving antenna for receiving the electric wave transmitted from the transmitting antenna is provided on a surface facing the inside of the combustion chamber of a suction valve and/or an exhaust valve.