Current self-control type glow plug

(19)

(11)

EP 0 657 698 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	28.08.1996 Bulletin 1996/35

(43)	Date of publication A2:
	14.06.1995 Bulletin 1995/24

(21)	Application number: 94308900.3

(22)	Date of filing: 30.11.1994

(51)	International Patent Classification (IPC)⁶: F23Q 7/00

(84)	Designated Contracting States:
	DE FR GB

(30)

Priority:

13.12.1993 JP 341194/93

(71)	Applicant: ISUZU CERAMICS RESEARCH INSTITUTE CO., LTD.
	Fujisawa-shi, Kanagawa-ken (JP)

(72)	Inventor:
	Kawamura, Hideo Kouza-gun, Kanagawa-ken T 253-01 (JP)

(74)	Representative: Jenkins, Peter David et al
	PAGE WHITE & FARRER 54 Doughty Street London WC1N 2LS London WC1N 2LS (GB)

(54)	Current self-control type glow plug

(57) A current self-control type glow plug includes a ceramic pipe 2 attached to a hollow body 1 having a connector 12, and a front end portion 15 and a body-side end portion 17 of the pipe 2 are filled with ceramic fillers 6,7. The coil 3 comprises the heating coil part 4 and the control coil part 5. The heating coil part 4 constituting a heating part is arranged in contact with the inner wall surface 20 of the pipe 2. The control coil part 5 constituting a current control part is arranged out of contact with the inner wall surface 20 of the pipe 2. The current control means 10 having a positive resistance-temperature coefficient is connected to the coil 3 and the connector 12. The resistance of the current control means 10 sharply increases above a specified temperature to cut off the current supply to the coil 3.

Search report