Electric heating – Heating devices – Resistive element: igniter type
Patent
1986-06-12
1988-05-03
Paschall, M. H.
Electric heating
Heating devices
Resistive element: igniter type
219541, 219523, 219553, 123145A, 123179H, F02N 1700, F23Q 722
Patent
active
047422092
ABSTRACT:
There is disclosed glow plug for a diesel engine provided with an elongated ceramic heater retained by an opening end of a hollow holder with one end of said ceramic heater being projected toward the outside. The ceramic heater comprises an insulating tubular section of an insulating ceramic material, and a heating body as a continuous conductive section formed so as to cover the outer peripheral portion, the outermost portion and the hollow portion of the insulating tubular section with a conductive ceramic material, the heating body being formed in a manner that the thickness of at least the outer peripheral portion of the insulating tubular member in the vicinity of said one end of the ceramic heater is thinner than that of other portions thereof. The insulating tubular section and the heating body constituting the ceramic heater are integrally formed with the ceramic material which can select insulating property and conductive property by adjusting an amount of titanium nitride added into .beta.-sialon or a sialon consisting of a mixture of .alpha.- and .beta.- sialons. Thus, there is provided a glow plug provided with a ceramic heater which exhibits a function as a heater of the rapid heating type and provide a self-temperature saturation characteristic such that its heating characteristic can be improved to attain after glow for a long time.
REFERENCES:
patent: 4357526 (1982-11-01), Yamamoto et al.
patent: 4401065 (1983-08-01), Minegishi et al.
patent: 4598676 (1986-07-01), Ito et al.
Hatanaka Koji
Maruta Kenzi
Masaka Mitusuke
Minegishi Sokichi
Suwabe Hirohisa
Hitachi Metals Ltd.
Jidosha Kiki Co. Ltd.
Paschall M. H.
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