(19)
(11) EP 0 980 972 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.05.2001 Bulletin 2001/20

(43) Date of publication A2:
23.02.2000 Bulletin 2000/08

(21) Application number: 99110286.4

(22) Date of filing: 27.05.1999
(51) International Patent Classification (IPC)7: F02D 41/38, F02D 41/14, F02D 41/10
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 19.08.1998 JP 23321998

(71) Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Aichi-ken 471-8571 (JP)

(72) Inventors:
  • Fukuma, Takao
    Toyota-shi, Aichi-ken 471-8571 (JP)
  • Killmann, Gerald
    Toyota-shi, Aichi-ken 471-8571 (JP)

(74) Representative: Pellmann, Hans-Bernd, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Apparatus and method for controlling fuel injection in internal combustion engine


(57) An apparatus and a method for controlling fuel injection in an internal combustion engine (1) for preventing torsional vibrations of the engine without deteriorating the acceleration performance is disclosed. The apparatus is provided with a control unit (an ECU) (30) for controlling a fuel injection quantity for the diesel engine (1) of a vehicle (10). The ECU (30) calculates the change rate ΔNE of engine revolutions in accordance with an input from a crank angle sensor (35) and subtracts a value obtained by smoothing a variation component of ΔNE from the ΔNE so as to extract a torsional vibration component thereof. Moreover, the ECU (30) corrects the fuel injection quantity of the engine to reduce the torsional vibration component. Since the extracted torsional vibration component does not contain steady change in the revolutions during acceleration or the like, the steady change in the revolutions caused only by the acceleration is not affected by the correction of the fuel injection quantity. Therefore, deterioration in the acceleration performance caused by prevention of the torsional vibrations can be prevented.






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