SPARK PLUG FOR INTERNAL COMBUSTION ENGINE Russian patent published in 2009 - IPC H01T13/20 H01T13/38 

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering, and particularly, to electrical parts of internal combustion engines. The spark plug of internal combustion engine is enclosed into metal housing. The central and side electrodes as well as ceramic insulator of the central electrode are installed with air gap in the spark plug. According to the invention, the surfaces of central and side electrode insulators as well as the points of the metals parts connection with ceramic insulator are coated with metal having low specific resistivity. Metal salt having low specific resistivity is sprayed on the surface of the ceramic insulator.

EFFECT: improved stability and reliability of spark plug operation.