(19)
(11)EP 1 310 670 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
21.06.2006 Bulletin 2006/25

(43)Date of publication A2:
14.05.2003 Bulletin 2003/20

(21)Application number: 02024948.8

(22)Date of filing:  06.11.2002
(51)Int. Cl.: 
F02P 5/15  (2006.01)
F02D 37/02  (2006.01)
F02D 35/02  (2006.01)
(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
Designated Extension States:
AL LT LV MK RO SI

(30)Priority: 09.11.2001 JP 2001344645

(71)Applicant: NISSAN MOTOR CO., LTD.
Yokohama-shi Kanagawa-ken (JP)

(72)Inventor:
  • Hoshino, Masato
    Kawasaki-shi, Kanagawa (JP)

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

  


(54)Setting minimum spark advance for best torque in an internal combustion engine


(57) An internal combustion engine (1) causes an air-fuel mixture produced in a combustion chamber (23) to burn by means of ignition using a spark plug (24). A programmable controller (20) calculates a reaction probability expressing the combustibility of the air-fuel mixture inside the combustion chamber (23) and the combustion rate of the air-fuel mixture on the basis of the operating conditions of the engine 1 (S13, S27, S32). An air-fuel mixture combustion period is calculated on the basis of the volume of the combustion chamber at the combustion start timing, the reaction probability, and the combustion rate (S29, S34). On the basis of this combustion period, a target ignition timing of the spark plug (24) can be accurately set under a small calculation load.