Glow plug for internal combustion engine

Electric heating – Heating devices – Resistive element: igniter type

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Details

123145A, 219544, 219553, 338238, 361266, H05B 300, F02P 1902, F23Q 700, H01C 103

Patent

active

049637177

ABSTRACT:
A glow plug including a shell provided with an axially extending bore and a tubular sheath partially located in the bore and partially projecting from the shell. At least a first electrical resistance is located in the portion of the sheath extending outside the shell. The tubular sheath is filled with two different powders. Both powders have good electrical insulating characteristics. The first powder is located in the free closed end of the sheath and has good thermal conductivity characteristics. The second powder is located in the portion of the sheath located in the shell bore and has good thermal insulating characteristics. The interface between the two powders can be varied with the design of the glow plug and the type of resistance located in the sheath.

REFERENCES:
patent: 2672546 (1954-03-01), Klingner et al.
patent: 4200077 (1980-04-01), Kauhl et al.

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