Multiple air gap spark plug having resistive electrode coupling

Details Multiple air gap spark plug having resistive electrode coupling Multiple air gap spark plug having resistive electrode coupling

1974-12-26

1977-01-25

Myhre, Charles J.

Internal-combustion engines

Igniters

Sparkers

123169EL, 313140, 313142, 315 58, H01T 1320

Patent

active

040045625

ABSTRACT:
A spark plug having multiple air gaps is described. The multiple gaps are defined by at least three electrode members defining at least two air gaps. A first electrode member is communicated to a ground potential while a second electrode member, the electrode member which is maximally spaced apart from the first electrode member, is communicated to a source of high voltage potential. The remaining electrode members are positioned intermediate the first and second electrode members and are arranged to be coupled by high resistance electrical means to either the ground or the high voltage potential. In a preferred embodiment, the high resistance means comprise a ladder type resistance network embedded within the ceramic body of the spark plug and electrically interconnecting the intermediate electrode members and the electrical connecting cap of the spark plug device. The air gaps so formed are broken down in sequence and share in the dissipation of the stored energy. The electrodes are arranged so that the air gaps extend away from the spark generating device.

REFERENCES:
patent: 1253587 (1918-01-01), Graham
patent: 1381167 (1921-06-01), De Clairmont
patent: 3394285 (1968-07-01), Lindsay
patent: 3488556 (1970-01-01), Burley
patent: 3567987 (1971-03-01), Schnurmacher
patent: 3921020 (1975-11-01), Wax
patent: 3956664 (1976-05-01), Rado et al.

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