(19)
(11) EP 3 418 551 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.01.2019 Bulletin 2019/01

(43) Date of publication A2:
26.12.2018 Bulletin 2018/52

(21) Application number: 18176648.6

(22) Date of filing: 07.06.2018
(51) International Patent Classification (IPC): 
F02M 65/00(2006.01)
 F04B 51/00(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: 23.06.2017 GB 201710058

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

(72) Inventors:
  • ERNST, Kai
    24159 Kiel (DE)
  • HERRMANN, Gerhard
    24251 Osdorf (DE)

(74) Representative: Kramer Barske Schmidtchen Patentanwälte PartG mbB 
European Patent Attorneys Landsberger Strasse 300
80687 München
80687 München (DE)

   


(54) METHOD TO CALIBRATE A FUEL INJECTION PUMP


(57) A method (400) for calibrating a fuel injection pump (106) for a start of a fuel delivery includes calibrating a pressure gauge (200) of an air supply system (172) to a target reading by providing an air flow from the air supply system (172) to a calibration nozzle (176). The pressure gauge (200) is configured to monitor a pressure differential across a membrane (184) of the air supply system (172). The method (400) includes passing the air flow from the air supply system (172) through an air gap (160) defined by one or more bores (150,152) of the fuel injection pump (106), and monitoring a reading of the pressure gauge (200). The method (400) includes moving a plunger (140) of the fuel injection pump (106) to close, at least partly, the air gap (160) to attain the target reading on the pressure gauge (200).







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Search report