JPS6438908A - Ignition wire for internal combustion engine - Google Patents

Abstract

PURPOSE:To obtain an ignition wire of a low electrostatic capacity, with little variation of resistance value even though it is bent, and of a low cost, by composing the wire with a fine diameter conductor of a specific scope of resistance value consisting of a collecting body of a reinforcing fiber and a conductive fiber of a specific thickness and resistance and a rubber insulating layer furnished thereover. CONSTITUTION:An ignition wire is composed of a fine diameter conductor 3 with a structure of a collecting body 1 of a conductor fiber 11 and a reinforcing fiber 12, on which a semiconductor layer 2 is formed, and a rubber insulating layer 4 covering the outside of the conductor 3. As the conductor, a simple structure of the collecting body 1 of the reinforcing fiber 12 and the conductive fiber 11 with the thickness 10 to 300 deniers and the resistance value 1 to 500OMEGA/m is used. Consequently, since the wire is fine and makes little variation of resistance value to a bending, a stable low electrostatic capacity can be obtained constantly. In such a composition, the reduction of impedance of the wire to the earth potential and the leak current are little even though an electrolyte such as an antifreezing mixture is attached, the engine starting is made smooth, and the cost is reduced.