(19)
(11) EP 3 061 956 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.10.2016 Bulletin 2016/43

(43) Date of publication A2:
31.08.2016 Bulletin 2016/35

(21) Application number: 16156711.0

(22) Date of filing: 22.02.2016
(51) International Patent Classification (IPC): 
F02D 41/38(2006.01)
F02D 41/14(2006.01)
 F02D 41/12(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
Designated Validation States:
MA MD

(30) Priority: 24.02.2015 JP 2015034410

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

(72) Inventors:
  • MIZUNO, Hiroyuki
    Aichi-ken, Aichi 471-8571 (JP)
  • SHINAGAWA, Tomohiro
    Aichi-ken, Aichi 471-8571 (JP)
  • KOISHIKAWA, Takahisa
    Aichi-ken, Aichi 471-8571 (JP)

(74) Representative: D Young & Co LLP 
120 Holborn
London EC1N 2DY
London EC1N 2DY (GB)

   


(54) CONTROL DEVICE AND CONTROL METHOD OF FUEL PRESSURE OF ENGINE


(57) A control device of an engine, the control device includes an ECU (27) that is configured to: control a fuel discharge amount of a fuel pump (14) such that an actual fuel pressure (PR) of a fuel to be supplied to an injector (24) is equal to a target fuel pressure (PRRQ); perform a predictive control when the ECU predicts that an engine load would decrease, the predictive control is a control to decrease the fuel discharge amount to be smaller than a value corresponds to a current value of the target fuel pressure; and control the fuel discharge amount to maintain the actual fuel pressure at a lower limit guard value (PRGD) when the actual fuel pressure is equal to or lower than the lower limit guard value and is lower than the target fuel pressure, during the execution of the predictive control.







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