GROUND ELECTRODE FOR SPARK PLUG Russian patent published in 1998 - IPC

FIELD: ignition equipment of internal combustion engines. SUBSTANCE: electrode is designed as L-shaped rod which cross section, at least in region which is located above central electrode, has low aerodynamic drag in direction opposite to central electrode. In addition cross section of ground electrode may have shape which is similar to cone when cone section plane runs through its base, or shape which is similar to cylinder, when cylinder section plane runs through one of its bases. Alternatively, end plane of electrode may be designed at acute angle with respect to plane which is located above central electrode. EFFECT: increased reliability of ignition of air-fuel mixture. 4 cl, 6 dwg