Car engine ignition coil having constant ferromagnetic section with primary/secondary winding and ferromagnetic material return path with constant distance gap two central core faces

摘要

The ignition coil (1) has a ferromagnetic center (2) with a primary (6) and secondary winding (8). There is a section (10) in ferromagnetic material returning magnetic flux with two faces (12a,12b) facing the coil main faces (4,5). The center section (2) is a constant section along the length, with a constant distance gap from the two faces.