Apparatus for preventing electro-magnetic wave noise from being radiated and conducted from igniting device of gasoline engine

An apparatus for preventing the radiation and conduction of an electro-magnetic wave noise generated by the ignition device of a gasoline engine, comprising:

• a ceramic capacitor (C1) for absorbing an electro-magnetic wave noise of a low frequency band generated by an igniting coil (4);
• a contact breaker contact protecting capacitor (C2) for damping an electro-magnetic wave noise of a low frequency band generated by and conducted from a power distributor (6);
• a through capacitor (3) for damping a conducted noise of a low frequency band generated from between an igniting switch (2) and said igniting coil (4);
• a shielding box (7) for shielding and bypassing a conduction noise generated from said igniting coil (4);
• a ferrite sealant (5) unitizingly attached to the inside of said shielding box (7) in such a manner as to seal off all the gaps and slits of said shielding box (7), and for absorbing a conduction noise of a low frequency band to convert the noise to a thermal energy;
• a ferrite absorber (12) provided as a part of an igniting cable (70) connected to said igniting device, and for damping an electro-magnetic wave noise of a wide frequency band;
• a wire network (13) provided as the outer part of said igniting cable (70), and for bypassing the conduction of an electro-magnetic wave noise;
• and
• a resistance member (29) disposed inside an igniting plug (50), and for damping and converting the absorbed noise into a thermal energy to bypass it to ground.