Self temperature control type glow plug

Details Self temperature control type glow plug Self temperature control type glow plug

1991-10-02

1993-06-08

Bartis, Anthony

Electric heating

Heating devices

Resistive element: igniter type

123145A, 219552, 219553, H05B 302, F23Q 722, F02P 908

Patent

active

052181839

ABSTRACT:
A self temperature control type glow plug has a metallic shell in which ceramic heater having a glow resistor of a tungsten-based alloy embedded in a silicon nitride ceramic is placed in a manner to extend beyond the front end of the shell. A temperature-regulating resistor of nickel, iron or nickel-iron alloy is embedded within the metallic shell in series with the glow resistor. Each resistor has a positive temperature coefficient (PTC), with the positive temperature coefficient of the glow resistor being smaller than that of the temperature-regulating resistor. The electrical resistance ratio of the temperature regulating resistor to the glow resistor falls within a range of 0.35 to 0.60 at room temperature.

REFERENCES:
patent: 4423309 (1983-12-01), Murphy
patent: 4476378 (1984-10-01), Takizawa et al.
patent: 4636614 (1987-01-01), Itoh et al.
patent: 4725711 (1988-02-01), Minegishi et al.

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