(19)
(11) EP 0 478 099 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.09.1994 Bulletin 1994/37

(43) Date of publication A2:
01.04.1992 Bulletin 1992/14

(21) Application number: 91250240.8

(22) Date of filing: 29.08.1991
(51) International Patent Classification (IPC)5: F04B 1/06, F01L 9/02, F02M 47/04
(84) Designated Contracting States:
CH DE DK LI

(30) Priority: 28.09.1990 JP 257336/90
09.10.1990 JP 269369/90

(71) Applicant: MITSUBISHI JUKOGYO KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Irie, Yasutaka, c/o Yokohama Dockyard, Machin.Wrks
    Naka-ku, Yokohama, Kanagawa Pref. (JP)
  • Ono, Shigemi, c/o Yokohama Dockyard, Machin.Wrks
    Naka-ku, Yokohama, Kanagawa Pref. (JP)
  • Kunimoto, Etsuo, c/o Nagasaki Techn. Inst.
    Nagasaki, Nagasaki Pref. (JP)
  • Tosa, Youzou, c/o Nagasaki Techn. Inst.
    Nagasaki, Nagasaki Pref. (JP)
  • Nagae, Yoshinori, c/o Nagasaki Techn. Inst.
    Nagasaki, Nagasaki Pref. (JP)

(74) Representative: Meissner, Peter E., Dipl.-Ing. et al
Meissner & Meissner, Patentanwaltsbüro, Postfach 33 01 30
D-14171 Berlin
D-14171 Berlin (DE)


(56) References cited: : 
   
       


    (54) High pressure oil generating apparatus of internal combustion engine


    (57) The present invention relates to a high pressure oil generating apparatus of an internal combustion engine for driving valves or devices installed in the internal combustion engine with working oil. The construction consists of a cam (4) having one and more lobes fixed to a crank shaft (1) as one body, one and more jerk type high pressure pumps (9) operated by the cam (4), a working oil source (20) for feeding working oil to the high pressure pumps (9), an accumulator (17) for accumulating high pressure working oil discharged from respective high pressure pumps (9) and a control means (16), and is characterized in that the rack positions of above-mentioned respective high pressure pumps (9) are adjusted and the working oil pressure is controlled at a predetermined pressure by the control means (16).
    Thus, the high pressure oil generating apparatus is applied practically for controlling the fuel injection quantity of the internal combustion engine and for controlling a suction/discharge valve, and particularly for controlling operation of a discharge valve.






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