Glow plug for diesel engine with ptc control element disposed in

Details Glow plug for diesel engine with ptc control element disposed in Glow plug for diesel engine with ptc control element disposed in

1997-01-10

2000-03-14

Paschall, Mark

Electric heating

Heating devices

Resistive element: igniter type

219260, 219264, F23Q 722

Patent

active

06037568&

ABSTRACT:
A glow plug for a diesel engine includes a heat generating coil, a control coil, a sheath, an electrode rod, and a housing. The heat generating coil serves as a heater element. The control coil is connected in series with the heat generating coil and serves as a controller for controlling power supply to the heat generating coil. The control coil has a positive temperature coefficient of resistance larger than that of the heat generating coil. The sheath accommodates the heat generating coil and the control coil to be embedded in a heat-resistant insulating powder. The sheath has an elongated small-diameter portion on a distal end side thereof and a large-diameter portion on a rear end side thereof. The heat generating coil is connected to an inner wall of a distal end of the small-diameter portion of the sheath. The electrode rod has a distal end portion to which one end of the control coil is connected. The housing supports a rear end portion of the sheath on the distal end side thereof, and the electrode rod. The heat generating coil is disposed in a distal end portion of the small-diameter portion of the sheath, and the control coil is disposed to extend from the small-diameter portion to the large-diameter portion of the sheath.

REFERENCES:
patent: 4733053 (1988-03-01), Mueller
patent: 5039839 (1991-08-01), Masaka et al.
patent: 5118921 (1992-06-01), Aota
patent: 5132516 (1992-07-01), Hatanaka et al.
patent: 5206483 (1993-04-01), Aota
patent: 5521356 (1996-05-01), Bauer

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