EP1066469A1 - Dispositif d'injection de carburant - Google Patents

Dispositif d'injection de carburant

Info

Publication number
EP1066469A1
EP1066469A1 EP99957939A EP99957939A EP1066469A1 EP 1066469 A1 EP1066469 A1 EP 1066469A1 EP 99957939 A EP99957939 A EP 99957939A EP 99957939 A EP99957939 A EP 99957939A EP 1066469 A1 EP1066469 A1 EP 1066469A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
connecting means
injection device
connecting piece
injection valve
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.)
Granted
Application number
EP99957939A
Other languages
German (de)
English (en)
Other versions
EP1066469B1 (fr
Inventor
Martin Andorfer
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 EP1066469A1 publication Critical patent/EP1066469A1/fr
Application granted granted Critical
Publication of EP1066469B1 publication Critical patent/EP1066469B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • 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
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44

Definitions

  • the invention is based on a fuel injection device according to the preamble of the main claim.
  • fuel injection devices which have a fuel distributor on which a plurality of connecting pieces are provided for the installation of fuel injection valves.
  • additional connection elements are used for the safe and possibly non-rotatable installation of the fuel injection valves in the connecting piece, which act like clips or clips in the connection area.
  • Such connecting elements include a U-shaped spring clip from DE-OS 34 28 597, a C-shaped plastic clip from DE-OS 39 04 479, and a U-shaped spring clip from DE-OS 39 18 410 -OS 40 17 875 also a U-shaped spring clip, from DE-OS 44 13 914 a latchable, two-legged plastic clip, from US-PS 4,823,754 a U-shaped fastening clip and from US-PS 5,035,224 a U-shaped spring clip is known .
  • All of the aforementioned fuel injection devices are characterized in that, on the one hand, the connecting element engages in a recess of the fuel injection valve and on the other hand, the locking element engages around a locking element that is in any way radially outward on the connecting piece of the fuel distributor.
  • Snap springs (DE-OS 39 19 231) or locking lugs (DE-OS 195 46 441) are provided.
  • the snap springs encompass a locking collar which projects radially outward on the connecting piece of the fuel distributor, while the latching lugs snap into window-like recesses in the extended connecting piece.
  • the fuel injection device according to the invention with the characterizing features of the main claim has the advantage that a solid and secure connection of fuel injection valves in connection pieces of fuel distributors is made possible in a simple manner. There are no additional clamp-like or clasp-like ones for fixing the fuel injection valves
  • the fuel injection device is advantageously designed in such a way that, due to interruptions in the end section of the connecting piece, the connecting means presses it radially and effectively into the recessed corresponding connecting means under radial tension.
  • FIG. 1 shows a partially illustrated fuel injection device
  • FIG. 2 shows a first embodiment variant of a connection piece as a section along the line II-II in FIG. 1
  • FIG. 3 shows a second embodiment variant of a connection piece as a section along the line III-III in FIG. 1
  • FIG 4 shows a third embodiment variant of a connection piece as a section along the line IV-IV in FIG. 1
  • FIG. 5 shows a schematic and partially broken side view of the connection piece.
  • the fuel injection device for internal combustion engines which is partially shown in FIG. 1, has a fuel distributor 10 made of plastic or aluminum, which carries a plurality of connecting pieces 11.
  • the fuel injection valves 12 are consequently designed as so-called top feed injectors.
  • the number of connecting pieces 11 and fuel injection valves 12 depends on the number of cylinders to be supplied to the internal combustion engine.
  • four fuel injection valves 12 are provided, each of which is inserted in a liquid-tight manner in one of four connecting pieces 11 of the fuel distributor 10 with the aid of an upper sealing ring 14.
  • the fuel injection valve 12 protrudes with its end on the injection side into a receiving bore 16 of a cylinder head 17 (direct injection) or of a receiving connector 17 formed on an intake pipe
  • the fuel injection valves 12 which can be used in the fuel injection device according to the invention are, for example, electromagnetically actuable valves or valves operated with piezo actuators or magnetostrictive actuators.
  • the supply opening 13 of the connecting piece 11 is, for example, stepped, the supply opening 13 having a smaller diameter near a distributor opening 20 of the fuel distributor 10 than in an area 21 of the connecting piece 11 encompassing the fuel injector 12.
  • the outer diameter of the connecting piece 11 is constant over its entire length .
  • the fuel injection valve 12 and the connection piece 11 are provided with corresponding connecting means 22, 23.
  • Connection means 22 formed.
  • This at least one connecting means 22 engages in a corresponding connecting means 23, which represents a depression, on the outer circumference of the fuel injection valve 12.
  • This recessed connecting means 23 is, for example, a circumferential groove in the plastic encapsulation of the fuel injection valve 12.
  • the connecting means 22 of the fuel injection device according to the invention formed on the connecting piece 11 project radially inward into the supply opening 13.
  • FIG. 2 shows a first embodiment variant of a connection piece 11 as a section along the line II-II in FIG. 1, while FIG. 3 shows a second and FIG. 4 a third embodiment variant of a connection piece 11 as a section along the line III-III or the line IV -IV clarify in Figure 1.
  • the sectional representations are only the cut connecting piece 11 without the fuel injector 12 that can be inserted into it.
  • FIGS. 2 and 3 show two examples of a two-part connecting means 22a, 22b. Diametrically opposite are two hook-shaped in cross-section and each approx. 80 ° (FIG. 2) in
  • Connecting means 22a, 22b extending in the circumferential direction are provided.
  • the connecting means 22a, 22b can, however, extend just as well in an angular range from 20 ° to 120 °.
  • Connecting means 23 of the fuel injection valve 12 can also be divided.
  • the connecting means 22a, 22b can engage in two groove-shaped or slot-like, but not rotating connecting means 23 on the fuel injection valve 12. In this way, a very simple protection against rotation is provided.
  • the two connecting means 22a, 22b need not have the same extent. If the connecting means 22a, 22b and the corresponding
  • Connecting means 23 of different sizes results in an often desirable unambiguous installation position of the fuel injection valve 12 in the connecting piece 11. In this way, it is ensured without additional design means that exactly a desired installation position is realized.
  • the connecting means 22 can also consist of more than two parts; three to eight connecting means 22a, 22b can also be useful.
  • the connecting means 22 ' can also be designed in one piece, as can be seen in FIG. In this case, however, the connecting means 22 'in no case extends in the circumferential direction over 360 °, but for example over an angular range of 240 ° to 320 °.
  • the connecting means 22, 22 x must be interrupted at least at one point or must not rotate through 360 °, it is necessary for the fuel injector 12 to be mounted in the connecting piece 11 that it also does not extend at least in the area of the connecting means 22, 22 360 ° circumferential.
  • the connecting piece 11 is provided in its end section 25 facing away from the fuel distributor 10 and facing the connecting means 22, 22 with at least one interruption 26, which allows the connecting piece 11 to be slightly expanded radially.
  • FIGS. 2 and 3 show connecting pieces 11 which have two interruptions 26 which are diametrically opposite. In this way, two segments of the end section 25 are formed, in the middle of which the connecting means 22 are arranged. However, the end section 25 can e.g. also be formed with three to eight interruptions 26, so that there are then correspondingly three to eight segments of the end section 25, on which in turn three to eight connecting means 22 are implemented.
  • FIG. 4 shows an example of a connecting piece 11 with only one interruption 26.
  • the interruptions 26 are, for example, slit-like, the axial length of the interruptions 26 being limited. Ideally, the interruptions 26 are only so long that, when the fuel injector 12 is installed in the connecting piece 11, they only start downstream of the upper sealing ring 14 and extend as far as the connecting means 22, 22 ". The interruptions 26 are therefore only immediate introduced in the lower end section 25 of the connecting piece 11, so that a complete seal by the upper sealing ring 14th is guaranteed. This configuration is illustrated in FIG. 5 by a schematic and partially broken side view of the connecting piece 11.
  • the inner supply opening 13 in the region 21 or the upper sealing ring 14 have diameters, from which the at least one connecting means 22, 22 x projects further inwards towards a valve longitudinal axis 28, so that the sealing ring 14 indirectly over a certain axial distance viewed from the connecting means 22, 22 times under-grip.

Landscapes

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

Abstract

Un dispositif d'injection de carburant pour moteur à combustion interne présente un distributeur de carburant (10) portant une pluralité de tubulures de raccordement (11) pour le logement de soupapes d'injection de carburant (12) étanches au liquide. Il est prévu, sur chaque tubulure (11), des premiers moyens de connexion (22), et sur chaque soupape d'injection (12), des seconds moyens de connexion (23) en vue d'obtenir une connexion fiable. Les premiers moyens de connexion (22) sur les tubulures (11) s'étendent radialement vers l'intérieur. Les seconds moyens de connexion (23) sur les soupapes d'injection (12) sont constitués par des évidements en forme de rainures. La tubulure (11) comporte, dans sa section d'extrémité (25) présentant les premiers moyens de connexion (22), une discontinuité en forme de fente (26).
EP99957939A 1999-01-21 1999-10-28 Dispositif d'injection de carburant Expired - Lifetime EP1066469B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19902186A DE19902186A1 (de) 1999-01-21 1999-01-21 Brennstoffeinspritzvorrichtung
DE19902186 1999-01-21
PCT/DE1999/003450 WO2000043668A1 (fr) 1999-01-21 1999-10-28 Dispositif d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1066469A1 true EP1066469A1 (fr) 2001-01-10
EP1066469B1 EP1066469B1 (fr) 2004-10-13

Family

ID=7894880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99957939A Expired - Lifetime EP1066469B1 (fr) 1999-01-21 1999-10-28 Dispositif d'injection de carburant

Country Status (8)

Country Link
US (1) US6491026B1 (fr)
EP (1) EP1066469B1 (fr)
JP (1) JP2002535550A (fr)
KR (1) KR20010086261A (fr)
BR (1) BR9908987A (fr)
DE (2) DE19902186A1 (fr)
ES (1) ES2233087T3 (fr)
WO (1) WO2000043668A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10145035A1 (de) 2001-09-13 2003-04-10 Bosch Gmbh Robert Brennstoffeinspritzsystem
JP2004353520A (ja) 2003-05-28 2004-12-16 Mitsubishi Electric Corp 燃料噴射装置
US7107969B2 (en) * 2004-09-28 2006-09-19 Ford Global Technologies, Llc Twist-lock fuel injector assembly
DE602005024420D1 (de) * 2005-12-02 2010-12-09 Continental Automotive Gmbh Kraftstoffeinspritzvorrichtung
US7383818B1 (en) * 2007-04-04 2008-06-10 Gm Global Technology Operations, Inc. Fuel injector with secondary combustion seal
US20080295806A1 (en) * 2007-06-04 2008-12-04 Caterpillar Inc. Heat conducting sleeve for a fuel injector
EP2083167B1 (fr) * 2008-01-23 2017-05-10 Continental Automotive GmbH Agencement de couplage et ensemble de connexion
EP2093412B1 (fr) * 2008-02-19 2011-01-19 Continental Automotive GmbH Dispositif de couplage
DE602008004428D1 (de) * 2008-02-19 2011-02-24 Continental Automotive Gmbh Kupplungsvorrichtung
DE102008055105A1 (de) * 2008-12-22 2010-07-01 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
JP4692663B2 (ja) * 2009-03-31 2011-06-01 株式会社デンソー コネクタ

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
DE3010613A1 (de) 1980-03-20 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage
DE3428597C2 (de) 1984-08-02 1986-11-27 Bayerische Motoren Werke AG, 8000 München Verbindung zweier koaxial hintereinander angeordneter Rohrabschnitte, insbesondere einer Einspritzdüse mit dem koaxial angeordneten Anschlußstutzen einer Einspritzleitung
JPS63125171U (fr) 1987-02-09 1988-08-16
DE3904479A1 (de) 1989-02-15 1990-08-16 Bosch Gmbh Robert Verbindungselement
DE3918410A1 (de) 1989-06-06 1990-12-13 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung fuer brennkraftmaschinen
DE3919231C2 (de) * 1989-06-13 1997-03-06 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
US4950171A (en) * 1989-08-11 1990-08-21 Itt Corporation Fuel injector connector system
US4991557A (en) * 1989-08-21 1991-02-12 Siemens-Bendix Automotive Electronics L.P. Self-attaching electromagnetic fuel injector
DE4017875C2 (de) 1990-06-02 1999-02-04 Bosch Gmbh Robert Brennstoffeinspritzeinrichtung für Brennkraftmaschinen
US5035224A (en) 1990-07-06 1991-07-30 Siemens Automotive L.P. Clip retention of a split-stream fuel injector to a fuel rail cup including circumferential locator
US5394850A (en) * 1993-11-19 1995-03-07 Siemens Electric Limited Top-feed fuel injector mounting in an integrated air-fuel system
DE4413914A1 (de) 1994-04-21 1995-10-26 Bosch Gmbh Robert Brennstoffeinspritzeinrichtung
US5616037A (en) 1995-08-04 1997-04-01 Siemens Automotive Corporation Fuel rail with combined electrical connector and fuel injector retainer
DE19546441A1 (de) 1995-12-13 1997-06-19 Bosch Gmbh Robert Brennstoffverteiler
US5724946A (en) 1996-11-22 1998-03-10 Siemens Automotive Corporation Fuel rail and injector assembly
DE19725076A1 (de) * 1997-06-13 1998-12-17 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE19756102A1 (de) * 1997-12-17 1999-06-24 Bosch Gmbh Robert Montagevorrichtung zum Montieren von Brennstoffeinspritzventilen
JP2000018125A (ja) * 1998-07-01 2000-01-18 Mitsubishi Electric Corp 筒内噴射用燃料噴射弁

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0043668A1 *

Also Published As

Publication number Publication date
KR20010086261A (ko) 2001-09-10
DE19902186A1 (de) 2000-07-27
JP2002535550A (ja) 2002-10-22
ES2233087T3 (es) 2005-06-01
WO2000043668A1 (fr) 2000-07-27
US6491026B1 (en) 2002-12-10
EP1066469B1 (fr) 2004-10-13
DE59910842D1 (de) 2004-11-18
BR9908987A (pt) 2000-12-12

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