FIELD: electrical engineering.
SUBSTANCE: proposed spark plug comprises cylindrical body 1, circular spark-producing element 7 with working surface 8, central electrode 4 and two coaxial isolators 2, 3. Contact collar 6 is made on working face of cylindrical body 1. Central electrode 4 has disk contact 5. Contact collar 6 and disk contact 5 are furnished with circular contact ledges 11, 12. The latter are oriented toward working surface 8 of circular spark-producing element 7. Spark producing element 7 is spring loaded via coaxial isolators 2, 3 to contact collar 6 and disk contact 5. Springs 16, 17 are arranged on opposite side of working face of cylindrical body 1. Dielectric gaps are arranged between cylindrical body 1, circular spark producing element 7 and central electrode 4.
EFFECT: higher reliability, better thermal stability.
1 dwg
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