Ignition device for igniting fuel in internal combustion engine, has insulator and ignition electrode which project beyond outer conductor forward end in longitudinal direction and insulator extends beyond base points

摘要

The ignition device has an ignition electrode and an outer conductor surrounds the ignition electrode. An electrical insulator is located between the ignition electrode and the outer conductor. The insulator and the ignition electrode project beyond the outer conductor forward end in a longitudinal direction. The ignition electrode includes several electrode branches each starting from a base point. The insulator extends beyond the base points in longitudinal direction and an end surface of the electrode branches is uncovered.