Spark plug comprising a ground electrode support

H - Electricity – 01 – T

Patent

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Details

H01T 13/54 (2006.01) H01T 13/46 (2006.01)

Patent

CA 2704609

The invention relates to a spark plug of an internal com-bustion engine, especially for use in Otto gas engines. Said spark plug comprises, supported by an insulating body (1), a preferably one-piece spark plug shell (2) and a center electrode (3), which is especially rod--shaped or has a plurality of electrode fingers, and at least one ground electrode (4), preferably a plurality of ground electrodes, the center elec-trode (3) and the at least one ground electrode (4) being surrounded by a chamber, especially a pre-chamber (5a) or a swirl chamber (5b) sup-ported by the spark plug shell (2), or being located inside said chamber (5a, 5b). The invention is characterized in that the ground electrode(s) (4) has/have a support (6) secured to the spark plug shell (2) or arranged thereon as the base, or branch(es) off therefrom, and in that said ground electrode support (6) and every finger-type ground electrode (4) branching off therefrom is arranged at a distance (21) from the inner wall sur-face (7) of the chamber (5a, 5b).

La présente invention concerne la bougie d'allumage d'un moteur à combustion interne, notamment une bougie d'allumage destiné à être utilisée dans des moteurs à allumage commandé au gaz, comprenant un corps (2), de préférence monobloc, supporté par un élément isolant (1), ainsi qu'une électrode centrale (3), notamment en forme de tige ou de doigts, et au moins une électrode de masse (4), de préférence plusieurs électrodes de masse, l'électrode centrale (3) et ladite au moins une électrode de masse (4) étant entourées d'une chambre supportée par le corps (2) de la bougie d'allumage, notamment d'une préchambre (5a) ou d'une chambre de turbulence (5b), ou bien placées à l'intérieur de cette chambre (5a, 5b). Selon l'invention, l'électrode (les électrodes) de masse (4) présente(nt), en guise de base, un support (6), fixé au corps (2) de la bougie d'allumage ou placé sur ce dernier, ou bien sort(ent) dudit support et ce support pour électrode de masse (6) ainsi que chaque électrode de masse (4) en forme doigt, sortant dudit support, sont placés à une distance (21) de la surface de paroi interne (7) de la chambre (5a, 5b).

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