Coil device for e.g. fuel injection valve of internal combustion engine, has core placed in coil in radially inward adjusted manner, and comprising accommodation area for accommodating coil

摘要

The device (1) has a coil (5) formed from a coiled conductive wire. A core (2) is made of a magnetic material, and placed in the coil in a radially inward adjusted manner. The core has an accommodation area (10) accommodating the coil and has an outer surface. The outer surface contacts the conductive wire. The outer surface of the accommodation area has a dielectric coating (6), which is formed by adding a dielectric material e.g. diamond-like carbon.