Electric heating – Heating devices – Resistive element: igniter type
Patent
1984-06-08
1987-01-13
Bartis, Anthony
Electric heating
Heating devices
Resistive element: igniter type
123145A, 219544, 219553, 361266, H05B 300, F02P 1902, F23Q 722
Patent
active
046366148
ABSTRACT:
A rapid heating self-control type glow plug used for starting a Diesel engine, particularly, such a glow plug which is also used for regulating the cylinder or auxiliary combustion chamber temperature following starting and during normal operations of the engine. A resistor wire is connected in series with a heating wire embedded in a ceramic body. The heating wire is formed of a tungsten alloy having a temperature resistance coefficient at 1000.degree. C. no greater than 4 times that at room temperature, while the resistor has a positive temperature resistance coefficient at 1000.degree. C. no less than 5 times that at room temperature. Preferably, the tungsten alloy consists of tungsten and at least one of rhenium, cobalt, thorium, molybdenum and zirconium, with rhenium in an amount of 2 to 50 wt % being preferred, and rhenium in an amount of 10 to 30 wt % being the most preferable. The resistor is preferably a wire made of at least one of nickel, tungsten, molybdenum and iron.
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Itoh Tsuneo
Yokoi Shinichi
Bartis Anthony
NGK Spark Plug Co. Ltd.
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