Multielectrode spark plug

Details Multielectrode spark plug Multielectrode spark plug

1996-11-14

2000-05-16

O'Shea, Sandra

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313118, 313140, 123169EL, F02M 5706, F02P 1300, H01T 1300, H01T 1320

Patent

active

060641436

ABSTRACT:
In order to provide a multielectrode spark plug which is excellent in resistance to fouling and in which the voltage required for producing a spark can be lowered, the tip portion of at least one of plural ground electrodes is positioned by the side of an annular front end face of an insulator to form a semi-creeping spark discharging gap elongating along the surface of the insulator with the tip portion of a center electrode, and the tip portions of the ground other electrodes form aerial spark discharging gaps with the tip portion of the center electrode.

REFERENCES:
patent: 1359923 (1920-11-01), Savage
patent: 1381167 (1921-06-01), De Clairmont
patent: 1548556 (1925-08-01), Schmidt
patent: 2650583 (1953-09-01), Devaux
patent: 3313972 (1967-04-01), Beesch
patent: 3870918 (1975-03-01), Senda et al.
patent: 4845400 (1989-07-01), Takamura et al.
patent: 5448130 (1995-09-01), Matsutani et al.
patent: 5497045 (1996-03-01), Matsutani et al.
patent: 5581145 (1996-12-01), Kato et al.

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