Spark plug having dual gaps for internal combustion engines

Details Spark plug having dual gaps for internal combustion engines Spark plug having dual gaps for internal combustion engines

1981-04-24

1985-04-30

Demeo, Palmer

Electric lamp and discharge devices

Spark plugs

Non-conducting material in or adjacent gap

313141, H01T 1320, H01T 1332

Patent

active

045146578

ABSTRACT:
A spark plug for spark ignition type internal combustion engines includes an earth electrode formed of a heat-resisting metal, a central electrode, and a supplementary electrode provided on the earth electrode or the tip end of the central electrode. The supplementary electrode cooperates with one of the other electrodes to define therebetween a spark gap which is smaller in dimension than the normal spark gap defined between the earth and central electrodes. The supplementary electrode has a higher specific resistance than that of the earth electrode.

REFERENCES:
patent: 2391456 (1945-12-01), Hensel
patent: 2642053 (1953-06-01), Dowson
patent: 2900547 (1959-08-01), Engel
patent: 3673452 (1972-06-01), Brennen
patent: 3854067 (1974-12-01), Morgan
patent: 3872338 (1975-03-01), Wax
patent: 3921020 (1975-11-01), Wax
patent: 4122366 (1978-10-01), von Stutterheim et al.
patent: 4331899 (1982-05-01), Nishida et al.
Modern Ceramics, Some Principles and Concepts, Edited by Hove and Riley, 1965, p. 83.

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