(19)
(11) EP 2 610 467 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.10.2014 Bulletin 2014/44

(43) Date of publication A2:
03.07.2013 Bulletin 2013/27

(21) Application number: 12199415.6

(22) Date of filing: 27.12.2012
(51) International Patent Classification (IPC): 
F02D 31/00(2006.01)
F02P 9/00(2006.01)
F02D 41/22(2006.01)
F02D 41/24(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 28.12.2011 JP 2011288662

(71) Applicant: Suzuki Motor Corporation
Shizuoka-ken 432-8611 (JP)

(72) Inventors:
  • Uchiyama, Takahiro
    Shizuoka-Ken, 432-8611 (JP)
  • Nagumo, Tomoo
    Shizuoka-Ken, 432-8611 (JP)
  • Tsutsumi, Kenichi
    Shizuoka-Ken, 432-8611 (JP)
  • Otake, Hiroaki
    Shizuoka-Ken, 432-8611 (JP)

(74) Representative: Klunker . Schmitt-Nilson . Hirsch 
Patentanwälte Destouchesstraße 68
80796 München
80796 München (DE)

   


(54) Engine control device and engine control method


(57) An engine of a vehicle is provided with an engine control device including an idle speed control (ISC) device provided for an intake bypass passage connecting an upper side and a lower side of a throttle valve installed in an intake passage so as to control an idle speed of the engine by adjusting an amount of air flowing through the intake bypass passage at a time of idling of the engine. The engine control device includes: a throttle opening degree sensor disposed in the intake passage and configured to detect a degree of opening of the throttle valve; an intake pressure sensor disposed in the intake passage and configured to detect an intake negative pressure at the lower side of the throttle valve; and a control unit configured to control an output of the engine. The control unit is configured to perform an engine output suppression control of suppressing the output of the engine after determining that an ISC valve of the ISC device is abnormal in a case where the degree of opening of the throttle valve detected by the throttle opening degree sensor is within a predetermined range and when the intake negative pressure detected by the intake pressure sensor is low compared with a threshold value.







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