(19)
(11) EP 1 371 836 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.05.2006 Bulletin 2006/20

(43) Date of publication A2:
17.12.2003 Bulletin 2003/51

(21) Application number: 03013060.3

(22) Date of filing: 10.06.2003
(51) International Patent Classification (IPC): 
F02D 41/06(2006.01)
F02M 51/00(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: 10.06.2002 JP 2002169008
13.05.2003 JP 2003134554

(71) Applicant: NISSAN MOTOR COMPANY, LIMITED
Yokohama-shi, Kanagawa 221-0023 (JP)

(72) Inventors:
  • Semii, Kazuhiro
    Yokohama-shi, Kanagawa 233-0002 (JP)
  • Yamamoto, Naoki
    Kawasaki-shi, Kanagawa 214-0012 (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)

   


(54) Fuel supply control system for internal combustion engine


(57) A fuel supply control system is arranged to execute a first diagnosis based on the a fuel injection quantity (Qi) and a fuel pump discharge quantity (Q) after a feedback control of a fuel pressure (p) is started, to execute a second diagnosis when a result of the first diagnosis is NG or when the fuel pump discharge quantity (Q) approximately takes one of a maximum quantity (MAX) or minimum quantity (MIN) of the fuel pump discharge quantity, and to make a NG decision in the second diagnosis when a condition of a magnitude of a difference (Pcal) between a target fuel pressure (Pt) and an actual fuel pressure (P) is greater than a predetermined pressure is maintained for a predetermined time period (T).







Search report