EP0997634A2 - Dispositif de test mobile d'une pompe à haute pression - Google Patents

Dispositif de test mobile d'une pompe à haute pression Download PDF

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Publication number
EP0997634A2
EP0997634A2 EP19990119545 EP99119545A EP0997634A2 EP 0997634 A2 EP0997634 A2 EP 0997634A2 EP 19990119545 EP19990119545 EP 19990119545 EP 99119545 A EP99119545 A EP 99119545A EP 0997634 A2 EP0997634 A2 EP 0997634A2
Authority
EP
European Patent Office
Prior art keywords
pressure
high pressure
pressure pump
internal combustion
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19990119545
Other languages
German (de)
English (en)
Inventor
Baran Ayvaz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler AG
Original Assignee
DaimlerChrysler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0997634A2 publication Critical patent/EP0997634A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus

Definitions

  • the invention relates to a device for mobile Testing a high pressure pump of a common rail injection system for an internal combustion engine.
  • DE 195 13 158 A1 describes a device for detection a leak in a fuel supply system known in which a pressure sensor is provided is that continuously measures the fuel pressure. Moreover this device has a computing device on, the course of the fuel pressure after switching off the fuel pump and the course compares with a predeterminable course and when detected Deviations triggers an error display. To Switching off the fuel pump is done with this facility the pressure drop measured over time.
  • This facility is also for direct attachment to the Internal combustion engine provided and enables "onboard diagnosis”.
  • test facility described there is in built like a test bench and therefore makes it is necessary to remove the injection pump before the test.
  • a testing and diagnostic device is now used created by means of which the high pressure pump the common rail injection system very simple and checked in a car workshop in a very short time can be removed without removing the high pressure pump must become.
  • This is advantageous Exchangers of the high-pressure pump that have been common up to now if there is no damage or failure of the same more necessary.
  • this unit can advantageously to the high pressure pump in a very short time are connected and thus forms a test and Diagnostic device.
  • the only figure shows a schematic representation one on the high pressure pump of a common rail injection system attached to an internal combustion engine device according to the invention.
  • a cylinder head 1 On a cylinder head 1 one in its entirety Internal combustion engine, not shown, with a common rail injection system are known per se Way supply lines 2 for the fuel to be injected appropriate.
  • the supply lines go from a common one Rail or a distribution pipe 3, in which a high pressure built up and according to that Demand the internal combustion engine is supplied to this.
  • the distributor pipe 3 is of a not shown Supply line from a likewise not shown Fuel tank supplied.
  • a high pressure pump 4 attached serves to operate the internal combustion engine generate necessary pressure in the manifold 3.
  • the high pressure pump 4 in the mobile state of the To be able to test the motor vehicle, i.e. for example in a car repair shop, the 5 is connected to a connection High pressure side of the high pressure pump 4 a pressure line 6 attached.
  • a dashed line 7 Before attaching the pressure line 6 must first a dashed line 7, the the high-pressure pump during normal operation of the internal combustion engine 4 connects to the distributor pipe 3 from the connector 5 are removed.
  • a pressure vessel 8 connected, which in turn with a Pressure measuring device 9 is connected.
  • the Pressure line 6 the pressure vessel 8 and the pressure measuring device 9 formed as a unit, the then connected to the high pressure pump 4 in a very short time can become a testing and diagnostic facility forms.
  • the pressure vessel 8 can be vented beforehand.
  • the pressure applied preferably moves in a range from 1300 to 1500 bar.
  • the actuation of the starter and so the pressure to be kept at a constant level.
  • the pressure the fuel in the pressure tank 8 is then over a certain time, namely about 3 to 10 minutes, preferably approx. 5 minutes, held and by the pressure measuring device 9 measured.
  • the pressure measuring device 9 can be a known mechanical Manometer or identical to one already on the Internal combustion engine existing sensor trained be which for the operation of the internal combustion engine Measurement of the pressure in the manifold 3 used becomes.
  • the high pressure pump 4 If the pressure in the pressure vessel 8 over a lasted long enough, so the high pressure pump 4 checked as flawless. Should the pressure in the Pressure vessel 8 fall off after a certain time or only a slight or insufficient pressure built up can be, the high pressure pump 4 as Error source can be determined. This means that for example the seals or the piston of the High pressure pump 4 may be defective. Through this method prevents the error diagnosis in a vehicle workshop as a source of errors in the common rail injection system the high pressure pump 4 diagnosed without being checked at all. The entire test of the high pressure pump 4 takes here only about 15 minutes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Testing Of Engines (AREA)
EP19990119545 1998-10-30 1999-10-01 Dispositif de test mobile d'une pompe à haute pression Withdrawn EP0997634A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998150102 DE19850102C1 (de) 1998-10-30 1998-10-30 Vorrichtung und Verfahren zur mobilen Prüfung einer Hochdruckpumpe
DE19850102 1998-10-30

Publications (1)

Publication Number Publication Date
EP0997634A2 true EP0997634A2 (fr) 2000-05-03

Family

ID=7886185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990119545 Withdrawn EP0997634A2 (fr) 1998-10-30 1999-10-01 Dispositif de test mobile d'une pompe à haute pression

Country Status (2)

Country Link
EP (1) EP0997634A2 (fr)
DE (1) DE19850102C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849117A1 (fr) * 2002-12-23 2004-06-25 Delphi Tech Inc Procede pour diagnostiquer les pannes d'un systeme d'injection de carburant et outil pour sa mise en oeuvre
WO2023174612A1 (fr) * 2022-03-18 2023-09-21 Robert Bosch Gmbh Accumulateur haute pression compact

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1991801U (de) * 1967-05-19 1968-08-14 Friedmann & Maier Ag Pruefeinrichtung fuer einspritzpumpen.
DE19513158A1 (de) * 1995-04-07 1996-10-10 Bosch Gmbh Robert Einrichtung zur Erkennung eines Lecks in einem Kraftstoffversorgungssystem
DE19548279B4 (de) * 1995-09-28 2006-12-14 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems
DE19622757B4 (de) * 1995-11-09 2007-05-10 Robert Bosch Gmbh Verfahren und Vorrichtung zur Erkennung einer Leckage in einem Kraftstoffversorgungssystem einer Brennkraftmaschine mit Hochdruckeinspritzung
DE19618869C2 (de) * 1996-05-10 1998-04-09 Daimler Benz Ag Verfahren zur Dichtheitsprüfung eines Einspritzsystems einer Brennkraftmaschine und Vorrichtung zur Durchführung eines Verfahrens zur Dichtheitsprüfung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849117A1 (fr) * 2002-12-23 2004-06-25 Delphi Tech Inc Procede pour diagnostiquer les pannes d'un systeme d'injection de carburant et outil pour sa mise en oeuvre
WO2023174612A1 (fr) * 2022-03-18 2023-09-21 Robert Bosch Gmbh Accumulateur haute pression compact

Also Published As

Publication number Publication date
DE19850102C1 (de) 2000-03-16

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