Electrically conductive ceramic glow plug with axially extending

Details Electrically conductive ceramic glow plug with axially extending Electrically conductive ceramic glow plug with axially extending

1994-09-06

1996-05-21

Jeffery, John A.

Electric heating

Heating devices

Resistive element: igniter type

219541, 123145A, 338329, F23Q 700, H05B 300

Patent

active

055191878

ABSTRACT:
An electrically conductive ceramic glow plug for assisting in the combustion process of a compression ignition type internal combustion engine. The glow plug comprises a tubular metal outer body member adapted to be secured to a cylinder head of the engine, a lead-in wire terminal extending through the outer body member from one end thereof, and electrically conductive heating element extending through the outer metal body from the other end thereof, secured to the terminal. The heating element is an all-ceramic electrically conductive heating element, and includes a cylindrical body portion of ceramic particles having a thin path of electrically conductive ceramic particles disposed substantially coaxially with the body portion throughout its length from a heating tip at one end to the wire terminal at the other end. The ceramic heating element includes a coaxially extending pocket at the wire terminal end and the base of the pocket is exposed to the thin path of electrically conductive ceramic particles. The wire terminal is received and bonded by an electrically conductive brazing alloy within the pocket and is thereby in electrical contact with the heating element and the thin path of electrically conductive ceramic particles.

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