EP0569727B1 - Fuel supply line arrangement for an injection nozzle - Google Patents

Fuel supply line arrangement for an injection nozzle Download PDF

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Publication number
EP0569727B1
EP0569727B1 EP93106120A EP93106120A EP0569727B1 EP 0569727 B1 EP0569727 B1 EP 0569727B1 EP 93106120 A EP93106120 A EP 93106120A EP 93106120 A EP93106120 A EP 93106120A EP 0569727 B1 EP0569727 B1 EP 0569727B1
Authority
EP
European Patent Office
Prior art keywords
fuel
passage
inflow
cylinder head
supply line
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.)
Expired - Lifetime
Application number
EP93106120A
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German (de)
French (fr)
Other versions
EP0569727A1 (en
Inventor
Karl Dipl.-Ing. Hofmann (Fh)
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0569727A1 publication Critical patent/EP0569727A1/en
Application granted granted Critical
Publication of EP0569727B1 publication Critical patent/EP0569727B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors

Definitions

  • the invention is based on a fuel supply device for an injection nozzle used in a cylinder head of an internal combustion engine according to the preamble of claim 1.
  • a fuel supply device of this type the pipe socket and also the connecting piece of the inlet pipe are completely accommodated in the passage of the cylinder head.
  • This arrangement probably compensates for an offset of the nozzle holder of the injection nozzle in the cylinder head, but it can only be installed together with the inlet pipe brought up by the injection pump.
  • Such an arrangement is known from DE-A-3 128 523.
  • a particularly easy-to-assemble fuel supply device is obtained if it is designed in accordance with the characterizing part of claim 1, so that the injection nozzle and the pipe socket can be installed simultaneously and, independently of this, the pressure or supply pipe at a later point in time, preferably when connecting the injection pump , can be connected in a simple and clear manner.
  • a sealing ring is arranged in the collar of the pipe socket, which is preferably located in the pivot point of the pipe socket, a completely tight arrangement is given. Further it is advantageous to arrange a rod filter in the pipe socket according to claim 4.
  • FIG. 1 An embodiment of the invention is shown in the drawing, which shows part of a cylinder head of an internal combustion engine and a fuel supply device for an injection nozzle in section, and is explained in more detail below.
  • an injection nozzle 12 is inserted in a bore 11 leading to the combustion chamber, the nozzle holder 13 of which is held stationary by a claw 14.
  • the nozzle holder 13 has a laterally open inlet channel 15, in which a bore with a conical seat surface 16 is made open to the periphery of the nozzle holder 13.
  • a passage is arranged in the cylinder head 10 in the form of a stepped bore 17 which passes through a pipe socket 20.
  • the pipe socket 20 has an axial bore 21 with an extension 22 in the inlet end section 23, in which a rod filter 24 known per se is inserted. Approximately in the middle of its longitudinal extent, the pipe socket 20 has a collar 25 with a spherical shoulder 26, on which a union screw 28 screwed into the extension 18 of the bore 17 engages the pipe socket 20 against the nozzle holder 13. In order to ensure a tight connection even in the event of an axial offset of the nozzle holder 13, the pipe socket 20 has a spherical cone 29 on its outlet-side end section, which is clamped against the conical seat surface 16 of the nozzle holder 13.
  • the inlet-side end section 23 of the pipe socket 20 protrudes from the bore 17 in the cylinder head 10 and carries an external thread 31.
  • a union screw 32 is screwed onto this, which, via a washer 33, a conical connecting piece 34 on an inlet pipe 35 against a conical seat surface 36 at the inlet the bore 21 or extension 22 presses.
  • An O-ring 40 inserted in a circumferential groove 41 of the collar 20, the outer side of which rests against the wall of the bore 17, seals the annular gap surrounding the pipe socket 20 to the outside.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Die Erfindung geht aus von einer Kraftstoffzuleitungseinrichtung für eine in einem Zylinderkopf einer Brennkraftmaschine eingesetzten Einspritzdüse nach der Gattung des Anspruchs 1. Bei einer bekannten Kraftstoffzuleitungseinrichtung dieser Gattung sind der Rohrstutzen und auch das Anschlußstück des Zulaufrohrs vollständig im Durchgang des Zylinderkopfs untergebracht. Diese Anordnung gleicht wohl einen Versatz des Düsenhalters der Einspritzdüse im Zylinderkopf aus, ihre Montage ist jedoch nur zusammen mit dem von der Einspritzpumpe herangeführten Zulaufrohr möglich. Eine solche Anordnung ist aus der DE-A-3 128 523 bekannt.The invention is based on a fuel supply device for an injection nozzle used in a cylinder head of an internal combustion engine according to the preamble of claim 1. In a known fuel supply device of this type, the pipe socket and also the connecting piece of the inlet pipe are completely accommodated in the passage of the cylinder head. This arrangement probably compensates for an offset of the nozzle holder of the injection nozzle in the cylinder head, but it can only be installed together with the inlet pipe brought up by the injection pump. Such an arrangement is known from DE-A-3 128 523.

Eine besonders einfach zu montierende Kraftstoffzuleitungseinrichtung ergibt sich, wenn diese gemäß dem kennzeichnenden Teil des Anspruchs 1 ausgestaltet ist, so daß die Einspritzdüse und der Rohrstutzen gleichzeitig montiert werden können und davon unabhängig das Druck- oder Zulaufrohr zu einem späteren Zeitpunkt, vorzugsweise beim Anschließen der Einspritzpumpe, in einfacher und übersichtlicher Weise angeschlossen werden kann.A particularly easy-to-assemble fuel supply device is obtained if it is designed in accordance with the characterizing part of claim 1, so that the injection nozzle and the pipe socket can be installed simultaneously and, independently of this, the pressure or supply pipe at a later point in time, preferably when connecting the injection pump , can be connected in a simple and clear manner.

Wenn außerdem gemäß Anspruch 3 im Bund des Rohrstutzens ein Dichtring angeordnet ist, der vorzugsweise im Schwenkpunkt des Rohrstutzens liegt, ist eine völlig dichte Anordnung gegeben. Ferner ist es vorteilhaft, gemäß Anspruch 4 im Rohrstutzen ein Stabfilter anzuordnen.If, in addition, according to claim 3, a sealing ring is arranged in the collar of the pipe socket, which is preferably located in the pivot point of the pipe socket, a completely tight arrangement is given. Further it is advantageous to arrange a rod filter in the pipe socket according to claim 4.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt, die einen Teil eines Zylinderkopfes einer Brennkraftmaschine und eine Kraftstoffzuleitungseinrichtung für eine Einspritzdüse im Schnitt zeigt, und wird im folgenden näher erläutert.An embodiment of the invention is shown in the drawing, which shows part of a cylinder head of an internal combustion engine and a fuel supply device for an injection nozzle in section, and is explained in more detail below.

In einem Zylinderkopf 10 einer Brennkraftmaschine ist in einer zum Brennraum führenden Bohrung 11 eine Einspritzdüse 12 eingesetzt, deren Düsenhalter 13 von einer Klaue 14 ortsfest gehalten wird. Zum Zuführen von Kraftstoff hat der Düsenhalter 13 einen seitlich offenen Zulaufkanal 15, in dem eine zum Umfang des Düsenhalters 13 offene Bohrung mit einer kegeligen Sitzfläche 16 angebracht ist. In Ausrichtung zu dieser Sitzfläche 16 ist im Zylinderkopf 10 ein Durchgang in Form einer gestuften Bohrung 17 angeordnet, die ein Rohrstutzen 20 durchsetzt.In a cylinder head 10 of an internal combustion engine, an injection nozzle 12 is inserted in a bore 11 leading to the combustion chamber, the nozzle holder 13 of which is held stationary by a claw 14. For supplying fuel, the nozzle holder 13 has a laterally open inlet channel 15, in which a bore with a conical seat surface 16 is made open to the periphery of the nozzle holder 13. In alignment with this seat surface 16, a passage is arranged in the cylinder head 10 in the form of a stepped bore 17 which passes through a pipe socket 20.

Der Rohrstutzen 20 hat eine axiale Bohrung 21 mit einer Erweiterung 22 im einlaufseitigen Endabschnitt 23, in der ein an sich bekanntes Stabfilter 24 eingesetzt ist. Etwa in der Mitte seiner Längserstreckung hat der Rohrstutzen 20 einen Bund 25 mit einer balligen Schulter 26, an der eine in die Erweiterung 18 der Bohrung 17 eingeschraubte Überwurfschraube 28 angreifend den Rohrstutzen 20 gegen den Düsenhalter 13 spannt. Um einen dichten Anschluß auch bei axialem Versatz des Düsenhalters 13 sicherzustellen, hat der Rohrstutzen 20 an seinem auslaufseitigen Endabschnitt einen balligen Kegel 29, der gegen die kegelige Sitzfläche 16 des Düsenhalters 13 gespannt ist.The pipe socket 20 has an axial bore 21 with an extension 22 in the inlet end section 23, in which a rod filter 24 known per se is inserted. Approximately in the middle of its longitudinal extent, the pipe socket 20 has a collar 25 with a spherical shoulder 26, on which a union screw 28 screwed into the extension 18 of the bore 17 engages the pipe socket 20 against the nozzle holder 13. In order to ensure a tight connection even in the event of an axial offset of the nozzle holder 13, the pipe socket 20 has a spherical cone 29 on its outlet-side end section, which is clamped against the conical seat surface 16 of the nozzle holder 13.

Der zulaufseitige Endabschnitt 23 des Rohrstutzens 20 ragt aus der Bohrung 17 im Zylinderkopf 10 vor und trägt ein Außengewinde 31. Auf dieses ist eine Überwurfschraube 32 aufgeschraubt, die über eine Scheibe 33 ein kegeliges Anschlußstück 34 an einem Zulaufrohr 35 gegen eine konische Sitzfläche 36 am Einlaß der Bohrung 21 bzw. Erweiterung 22 drückt. Ein in einer Umfangsnut 41 des Bundes 20 eingelegter O-Ring 40, der mit seiner Außenseite an der Wand der Bohrung 17 anliegt, dichtet den den Rohrstutzen 20 umgebenden Ringspalt nach außen ab.The inlet-side end section 23 of the pipe socket 20 protrudes from the bore 17 in the cylinder head 10 and carries an external thread 31. A union screw 32 is screwed onto this, which, via a washer 33, a conical connecting piece 34 on an inlet pipe 35 against a conical seat surface 36 at the inlet the bore 21 or extension 22 presses. An O-ring 40 inserted in a circumferential groove 41 of the collar 20, the outer side of which rests against the wall of the bore 17, seals the annular gap surrounding the pipe socket 20 to the outside.

Claims (4)

  1. Fuel-supply line arrangement for a fuel-injection nozzle (12) inserted in the cylinder head of an internal-combustion engine, with a pipe connection piece (20) which is inserted in a passage in the cylinder head and is sealingly connected on the inflow side to the junction piece (34) of an inflow pipe (35) and which on the outflow side is pressed axially by means of a sealing face against a conical seat face on the nozzle holder of the fuel-injection nozzle by means of a male screw screwed into the passage in the cylinder head, characterized in that the pipe connection piece (20) passes through the passage and projects out of the passage (17) in the cylinder head (10) with its inflow-side end portion (23) which has an external thread (31) and together with which the junction piece (34) is pressed axially by means of a screwed-on union nut (32), and in that the pipe connection piece (20) has, between its inflow end and its outflow end, a crowned shoulder (26), against which presses the male screw (27) which is screwed into the passage (17) in the cylinder head (10) and which, pushed over the inflow-side end portion (23) in the direction of the outflow end of the pipe connection piece (20), leaves the inflow-side end portion (23) free.
  2. Fuel-supply line arrangement according to Claim 1, characterized in that the shoulder (26) is arranged on a collar (25) of the pipe connection piece (20).
  3. Fuel-supply line arrangement according to Claim 2, characterized in that a sealing ring (40) is arranged in a circumferential groove (41) in the collar (25) and bears on the wall of the passage (17).
  4. Fuel-supply line arrangement according to one of Claims 1 to 3, characterized in that a bar filter (24) is inserted in a widening (22) of the bore (21) of the pipe connection piece (20).
EP93106120A 1992-05-09 1993-04-15 Fuel supply line arrangement for an injection nozzle Expired - Lifetime EP0569727B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9206268U DE9206268U1 (en) 1992-05-09 1992-05-09 Fuel supply device for an injection nozzle
DE9206268U 1992-05-09

Publications (2)

Publication Number Publication Date
EP0569727A1 EP0569727A1 (en) 1993-11-18
EP0569727B1 true EP0569727B1 (en) 1995-12-13

Family

ID=6879319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106120A Expired - Lifetime EP0569727B1 (en) 1992-05-09 1993-04-15 Fuel supply line arrangement for an injection nozzle

Country Status (4)

Country Link
EP (1) EP0569727B1 (en)
JP (1) JP3616650B2 (en)
BR (1) BR9301773A (en)
DE (2) DE9206268U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1945119B (en) * 2006-11-16 2010-06-23 贵阳铝镁设计研究院 Cathode roasting furnace gas burner nozzle

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DE4239173C1 (en) * 1992-11-21 1993-09-02 Mercedes-Benz Aktiengesellschaft, 70327 Stuttgart, De Cylinder-head for fuel-injection engine - has pressure pipe passing through clamping screw and with union at protruding end for injection pipe
US5775303A (en) * 1995-06-30 1998-07-07 Cummins Engine Company, Inc. High Pressure Fuel Line Connection
DE19524520A1 (en) * 1995-07-05 1997-01-09 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE19526693A1 (en) * 1995-07-21 1997-01-23 Man Nutzfahrzeuge Ag Injection valve for air-compressing internal combustion engines
DE19543506C2 (en) * 1995-11-22 1998-04-09 Man Nutzfahrzeuge Ag Connection of an injection line to an injection valve
DE19608574A1 (en) * 1996-03-06 1997-09-11 Bosch Gmbh Robert Fuel supply device
DE19727543A1 (en) 1997-06-28 1999-01-07 Bosch Gmbh Robert Fuel supply device
DE19753518A1 (en) 1997-12-03 1999-06-10 Bosch Gmbh Robert Fuel supply device
DE19807711A1 (en) * 1998-02-24 1999-09-09 Man Nutzfahrzeuge Ag Device for dismantling pressure pipes on ice injection units of internal combustion engines
DE19814501A1 (en) * 1998-04-01 1999-10-07 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
GB9816264D0 (en) * 1998-07-24 1998-09-23 Lucas Ind Plc Connector
DE19850390A1 (en) * 1998-11-02 2000-05-04 Bosch Gmbh Robert Holding body for a fuel injection valve for internal combustion engines
GB9824735D0 (en) * 1998-11-12 1999-01-06 Lucas Ind Plc Injector and injector assembly
DE10111839A1 (en) * 2001-03-13 2002-09-19 Bosch Gmbh Robert High-pressure fuel connection
DE10346244A1 (en) * 2003-10-06 2005-04-28 Bosch Gmbh Robert injection
EP1985841A1 (en) * 2007-04-27 2008-10-29 Continental Automotive GmbH Fluid inlet arrangement for an injection valve and injection valve
EP2060776B1 (en) 2007-11-13 2011-10-05 Delphi Technologies Holding S.à.r.l. Fuel lance
CA2635410C (en) 2008-06-19 2010-08-17 Westport Power Inc. Dual fuel connector
DE102009029116A1 (en) 2009-09-02 2011-03-03 Robert Bosch Gmbh Fuel injector
AT509177B1 (en) * 2009-11-23 2013-09-15 Bosch Gmbh Robert PRESSURE TUBE FITTINGS FOR COMMON RAIL INJECTION SYSTEM
EP2354529B1 (en) * 2010-01-21 2012-09-19 Delphi Technologies Holding S.à.r.l. Fuel Pipe Assembly and Clamping Means
DE102010043366A1 (en) * 2010-11-04 2012-05-10 Robert Bosch Gmbh Device for media-tight connection of two high-pressure components
AT512162B1 (en) * 2012-05-08 2013-06-15 Bosch Gmbh Robert Locking pin with flow limiter
DE202012104347U1 (en) * 2012-11-12 2012-11-28 Ti Automotive (Heidelberg) Gmbh Screw connection device for pipelines, in particular for motor vehicle pipelines
CN107921334A (en) * 2015-07-08 2018-04-17 恩特格里斯公司 High pressure filter

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GB925937A (en) * 1959-06-05 1963-05-15 Tatra Np Improvements in and relating to fuel injection arrangements for compression-ignitionengines
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1945119B (en) * 2006-11-16 2010-06-23 贵阳铝镁设计研究院 Cathode roasting furnace gas burner nozzle

Also Published As

Publication number Publication date
JPH0633847A (en) 1994-02-08
DE9206268U1 (en) 1993-09-09
BR9301773A (en) 1993-11-16
EP0569727A1 (en) 1993-11-18
JP3616650B2 (en) 2005-02-02
DE59301140D1 (en) 1996-01-25

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