(19)
(11) EP 1 441 119 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.06.2010 Bulletin 2010/24

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

(21) Application number: 04000881.5

(22) Date of filing: 16.01.2004
(51) International Patent Classification (IPC): 
F02D 41/38(2006.01)
F02D 41/14(2006.01)
 F02D 41/30(2006.01)
F02D 41/24(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: 17.01.2003 JP 2003009924

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

(72) Inventors:
  • Fukushima, Takayuki
    Kariya-city, Aichi-pref., 448-8661 (JP)
  • Ishizuka, Kouzi
    Kariya-city, Aichi-pref., 448-8661 (JP)

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

   


(54) Fuel injection system for internal combustion engine


(57) An electronic control unit (ECU) (10) of a fuel injection system for an internal combustion engine performs feedback control of a fuel discharging quantity in both of normal control and learning control based on a pressure deviation between a target fuel pressure and an actual fuel pressure. In the learning control, the ECU (10) calculates a difference between first demand driving current and second demand driving current as a current learning value for learning and correcting target driving current. The ECU (10) renews and stores the current learning value in a memory. The first demand driving current is converted from the fuel discharging quantity as a target discharging quantity calculated through the above feedback control based on a reference property. The second demand driving current is converted from a known idling fuel discharging quantity.







Search report