(19)
(11) EP 1 350 951 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.06.2006 Bulletin 2006/23

(43) Date of publication A2:
08.10.2003 Bulletin 2003/41

(21) Application number: 03007258.1

(22) Date of filing: 31.03.2003
(51) International Patent Classification (IPC): 
F02P 19/02(2006.01)
 F02P 17/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 01.04.2002 JP 2002099128

(71) Applicant: Toyota Jidosha Kabushiki Kaisha
Toyota-shi, Aichi-ken 471-8571 (JP)

(72) Inventor:
  • Amano, Naoki, c/o Toyota Jidosha Kabushiki Kaisha
    Toyota-shi, Aichi-ken 471-8571 (JP)

(74) Representative: TBK-Patent 
Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Apparatus and method for detecting fault in glow plug


(57) In method and apparatus for detecting a fault in a glow plug provided in a diesel engine, a possibility of a fault in the glow plug is determined without utilizing a forced change in the state of energization of the glow plug for the purpose of diagnosis, before the presence of a fault in the glow plug is determined by utilizing the forced change in the state of energization of the glow plug. The process of determining the presence of the fault is not executed if it is determined in the process of determining the possibility of the fault that there is no possibility of a fault in the glow plug.







Search report