Diesel engine glow plug having SiALON heater

Details Diesel engine glow plug having SiALON heater Diesel engine glow plug having SiALON heater

1989-07-19

1990-04-03

Bartis, Anthony

Electric heating

Heating devices

Resistive element: igniter type

123145A, 219541, 219522, F23Q 724, F02P 1902, H05B 300

Patent

active

049142747

ABSTRACT:
A glow plug for a diesel engine includes a hollow holder, and a ceramic heater made of SiAlON extending through a distal end portion of the hollow holder and held by it. The ceramic heater is provided with a U-shaped heating element and a pair of lead portions extending backward from both ends of the U-shaped heating element and parallel to each other. The heating element and the pair of lead portions are integrally made of a resistive ceramic material. One of the lead portions is coupled to one end of an electrically conducting flexible wire, the other end of the wire being coupled to an external connecting terminal. A ration .epsilon.(.dbd.SH/SL) of cross-sectional areas SH of the U-shaped heating element to cross-section areas SL of the lead portions falls within the range of 0.15.ltoreq..epsilon..gtoreq.0.6.

REFERENCES:
patent: 4475029 (1984-10-01), Yoshida et al.
patent: 4741692 (1988-05-01), Sadakata et al.
patent: 4742209 (1988-05-01), Minegishi et al.

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