Fuel ignition device for internal combustion engine, has coil tapered to insulator body and wrapped on coil body, where coil body comprises tapered portion, which is wrapped to insulator body by turning coil

摘要

The device has an insulator body (1) carrying a central electrode (2), and a coil (3) connected to the central electrode, surrounded on a coil body and wrapped by a pipe housing (5). The coil is tapered to the insulator body and wrapped on the coil body. The coil body comprises a tapered portion, which is wrapped to the insulator body by turning the coil. The tapered portion adjoins a cylindrical coil body portion that is wrapped by turning the coil, where the tapered portion comprises an electrically conductive surface.