Car engine ignition coil, has closed magnetic circuit with magnetic gap filled permanent magnet and outer coil with permanent magnet limiting magnetic trajectory/magnetic field effect

摘要

The car ignition coil has a closed magnetic circuit (2) with a magnetic gap (3) in which is placed a permanent magnet (4) and with an outer coil. The magnet dimension takes up the air gap space, providing a magnetic trajectory limiting the offset of the magnetic field.