METHOD FOR SURFACE TREATMENT OF ELECTRODE IN DISTRIBUTOR OF INTERNAL COMBUSTION ENGINE FOR SUPPRESSING NOISE

摘要

METHOD FOR SURFACE TREATMENT OF ELECTRODE IN DISTRIBUTOR OF INTERNAL COMBUSTION ENGINE FOR SUPPRESSING NOISE An electrode for a spark discharge in a distributor is surface treated by using a spray coating process so as to provide the electrode with a surface layer of an electrically high resistive material, e.g. CuO, which surface layer further includes a predetermined percentage of refractory and electrical insulating material, e.g. A1203, SiO2 or MgO?A1203. A distributor having one such treated electrode for the distributor rotor and/or such treated electrodes for stationary terminals can exhibit stably-suppressed noise for over a long period of time.