Ignition coil assembly

摘要

An ignition coil assembly having a coil spring (26) made of electrically conductive material, an electrical coil connected to deliver electrical energy from the ignition coil assembly 11 through the coil spring and a ferromagnetic member (30) disposed within the coil spring. A resistive spark plug (40) is electrically coupled to the coil spring (26). The spark plug and ferromagnetic member (30) form a high pass filter (51) and low pass filter (58) respectively to reduce radio frequency interference.