SPARK PLUG (ALTERNATIVES)

FIELD: electric spark plugs for forced ignition of combustible mixtures in forced-ignition internal combustion engines, pre-start heaters of vehicle heaters, and for heating units. ^ SUBSTANCE: proposed electric spark plug (five alternatives) has insulator provided with shaped through channel accommodating current-carrying conductor with sequentially disposed central electrode, noise-suppressing resistor, and contact pin. Central electrode and contact pin are made in the form of pins. Noise-suppressing resistor is made in the form of composite electricity conductive mass having normalized active resistance and baked in insulator channel between central electrode and contact pin. The latter can be made of low-resistance pin-forming base disposed on at least side surface of base and electricity conductive sheath arranged to form electric coupling with base throughout entire application surface; contact pin may have pin-forming base made of electricity conductive material and magnetically permeable high-resistance electricity non-conductive or conductive sheath disposed on at least side surface of base; contact pin may have at least one reducing pin section or pin-forming dielectric base and high-resistance electricity-conductive sheath disposed on at least side surface of base; contact pin may be also made in the form of tube with non-axial or coaxial through channel or that blanked on at least one end and longitudinally disposed relative to longitudinal geometric axis of contact pin, its walls being formed by high-resistance electricity conductive material. ^ EFFECT: reduced energy loss and radiation level of electromagnetic field electric and magnetic components within wide spectrum of radio frequencies; enhanced power capacity which raises discharge energy in breakdown phase. ^ 5 cl, 5 dwg