(19)
(11) EP 1 431 553 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.12.2009 Bulletin 2009/53

(43) Date of publication A2:
23.06.2004 Bulletin 2004/26

(21) Application number: 03104340.9

(22) Date of filing: 24.11.2003
(51) International Patent Classification (IPC): 
F02D 41/16(2006.01)
F02D 41/24(2006.01)
 F02D 41/18(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: 02.12.2002 JP 2002350553

(71) Applicant: HONDA MOTOR CO., LTD.
Tokyo (JP)

(72) Inventors:
  • TSUYUGUCHI, Makoto
    4-1,Chuo 1-chome, Wako-shi, SAITAMA (JP)
  • HIRAKATA, Yoshiaki
    4-1,Chuo 1-chome, Wako-shi, SAITAMA (JP)

(74) Representative: Poulin, Gérard 
Brevalex 3, rue du Docteur Lancereaux
75008 Paris
75008 Paris (FR)

   


(54) Intake air flow control system for internal combustion engine


(57) To provide an intake air flow control system for an internal combustion engine with which it is possible to prevent a rise in cost and to prevent adverse effects on the starting characteristics of the internal combustion engine.
At the time of performing a reference position adjustment of an auxiliary intake air flow control valve, when both a first re-reading condition where the absolute value of the difference between a target idling engine speed and a current idling engine speed is smaller than a first threshold and a second re-reading condition where the absolute value of the difference between a calculated intake flow rate and a reference intake flow rate is greater than a second threshold are established, step S5 is performed in which a valve opening corresponding to the reference intake flow rate on a reference characteristic basis is used in place of a valve opening corresponding to the calculated intake flow rate.







Search report