(19)
(11) EP 2 059 665 A2

(12)

(88) Date of publication A3:
22.05.2008

(43) Date of publication:
20.05.2009 Bulletin 2009/21

(21) Application number: 07825062.8

(22) Date of filing: 05.09.2007
(51) International Patent Classification (IPC): 
F02D 41/02(2006.01)
(86) International application number:
PCT/IB2007/002558
(87) International publication number:
WO 2008/029256 (13.03.2008 Gazette 2008/11)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 06.09.2006 JP 2006241633

(71) Applicant: Toyota Jidosha Kabushiki Kaisha
Toyota-shi, Aichi-ken 471-8571 (JP)

(72) Inventors:
  • FUJIWARA, Takahiko
    Toyota-shi, Aichi-ken 471-8571 (JP)
  • NAKAGAWA, Norihisa
    Toyota-shi, Aichi-ken 471-8571 (JP)
  • KATO, Naoto
    Toyota-shi, Aichi-ken 471-8571 (JP)
  • OKAZAKI, Shuntaro
    Toyota-shi, Aichi-ken 471-8571 (JP)
  • IDE, Koji
    Toyota-shi, Aichi-ken 471-8571 (JP)

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

   


(54) AIR-FUEL RATIO CONTROL APPARATUS AND AIR-FUEL RATIO CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE