SPARK-PLUG FOR INTERNAL COMBUSTION ENGINE Russian patent published in 2006 - IPC H01T13/54 H01T13/40 

FIELD: engine engineering, namely, devices for ignition of gas mixture in internal combustion engines.

SUBSTANCE: in accordance to invention, spark plug contains body with chamber and aperture, central electrode with isolator and spark gap. Spark gap is made in form of circular slit, formed by edge of end of central electrode and edge of aperture in the body on internal surface of spark plug chamber. End of central electrode is positioned inside the chamber, and relation of parameters of spark gap is determined by formula where A - difference of radiuses of central electrode and aperture, B - distance from electrode end plane to chamber surface plane, C - value of spark gap. Aperture in the body of spark plug may be made in form of truncated cone, while diameter of central electrode is greater than diameter of aperture in the body for not less than two widths of spark gap - 2C.

EFFECT: improved ignition of poor working mixtures, stable ignition at all engine operation modes.

3 cl, 3 dwg