(19)
(11) EP 1 441 120 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.04.2011 Bulletin 2011/15

(43) Date of publication A2:
28.07.2004 Bulletin 2004/31

(21) Application number: 04001588.5

(22) Date of filing: 26.01.2004
(51) International Patent Classification (IPC): 
F02D 41/38(2006.01)
F02D 41/22(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: 27.01.2003 JP 2003017787

(71) Applicant: DENSO CORPORATION
Kariya-city, Aichi-pref, 448-8661 (JP)

(72) Inventor:
  • Uchiyama, Ken
    Kariya-shi Aichi-pref., 448-8661 (JP)

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

   


(54) Pressure accumulation type fuel injection system


(57) An engine control unit (ECU) (10) of a common rail type fuel injection system of an internal combustion engine (1) determines that an abnormality failure of a fuel supply pump (4) is generated, if an abnormally high-pressure state in which a common rail pressure exceeds a first threshold or a second threshold continues for a long time. The ECU (10) stops an operation of the engine (1) immediately or after an elapse of a predetermined period in accordance with a level of the abnormality failure. Thus, the abnormally high-pressure state in the common rail (2) can be avoided quickly and seizing and the like of the fuel supply pump (4) can be prevented. As a result, reliability and safety of the common rail type fuel injection system can be ensured.







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