(19)
(11) EP 3 578 800 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.02.2020 Bulletin 2020/09

(43) Date of publication A2:
11.12.2019 Bulletin 2019/50

(21) Application number: 19177995.8

(22) Date of filing: 03.06.2019
(51) International Patent Classification (IPC): 
F02M 59/20(2006.01)
F02M 59/26(2006.01)
 F02M 59/22(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:
KH MA MD TN

(30) Priority: 07.06.2018 GB 201809372

(71) Applicant: Caterpillar Motoren GmbH & Co. KG
24159 Kiel (DE)

(72) Inventors:
  • OHRT, Ole
    24159 Kiel (DE)
  • TUEXEN, Thorsten
    24159 Kiel (DE)

(74) Representative: Nordmeyer, Philipp Werner 
df-mp Dörries Frank-Molnia & Pohlman Patentanwälte Rechtsanwälte PartG mbB Theatinerstraße 16
80333 München
80333 München (DE)

   


(54) FUEL INJECTION SYSTEM, FUEL PUMP AND PLUNGER


(57) The present invention pertains to a fuel injection system (10) for use in an internal combustion engine comprising an injection nozzle (18) and a fuel pump (14) adapted for pressurizing fuel and for variably adjusting a feed rate of the pressurized fuel to be discharged to the injection nozzle (18) via a discharge valve of the fuel pump (14). The discharge valve is configured to open at a predetermined opening pressure so as to discharge the pressurized fuel from the fuel pump (14). In a non-injection mode of the fuel injection system (10), the fuel pump (14) is configured to pressurize fuel flowing through the fuel pump (14) to a pressure level higher than the opening pressure of the discharge valve.







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