EP0862689A1 - Distributeur de carburant - Google Patents

Distributeur de carburant

Info

Publication number
EP0862689A1
EP0862689A1 EP97941817A EP97941817A EP0862689A1 EP 0862689 A1 EP0862689 A1 EP 0862689A1 EP 97941817 A EP97941817 A EP 97941817A EP 97941817 A EP97941817 A EP 97941817A EP 0862689 A1 EP0862689 A1 EP 0862689A1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel distributor
distributor according
valve
contact
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
EP97941817A
Other languages
German (de)
English (en)
Other versions
EP0862689B1 (fr
Inventor
Werner Hofmeister
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 EP0862689A1 publication Critical patent/EP0862689A1/fr
Application granted granted Critical
Publication of EP0862689B1 publication Critical patent/EP0862689B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus

Definitions

  • the invention relates to a fuel distributor according to the preamble of the main claim.
  • a fuel distributor is already known from EP-OS 0 374 422, which has a plurality of connecting pieces into which fuel injection valves of an internal combustion engine can be inserted, which in turn are supplied with fuel from the fuel distributor.
  • the fuel distributor is made of plastic and has an almost circular, closed fuel channel.
  • the connecting pieces are each connected to the fuel channel through an opening.
  • the largely dimensionally stable fuel distributor engages in tension clamps provided on the fuel injection valves, which allow the fuel injection valves to be held axially.
  • a guide channel integrated in the fuel distributor and accommodating several electrical lines runs parallel to the fuel channel.
  • a plug element provided on the electrical lines engages in a connector plug formed in the injection valves.
  • the guide channel is provided with a receiving device in order to encompass a receiving section of a connecting part fastened to the fuel injection valve and on which the connecting plug is provided.
  • a fuel injection system for internal combustion engines which comprises a plurality of electromagnetically actuated fuel injectors and a dimensionally stable fuel line, the fuel line having valve receptacles into which the fuel injectors can be inserted in a sealing manner.
  • the fuel line is formed by a fuel distribution line and an overlying fuel return line.
  • the individual fuel injectors are contacted via an electrical plug connection, so that additional contact lines or plug elements and seals are necessary.
  • an electrical plug is provided on the fuel line in the region of each valve receptacle, via which the electrical connection to the electrical plug connection of the fuel injector can be made at the same time when the fuel injector is inserted into the valve receptacle.
  • This solution is also complex and cumbersome, since several specially shaped plug parts have to protrude from the fuel line in the direction of the plug connections.
  • Another fuel distributor can be found in EP-PS 0 530 337.
  • This fuel distributor also includes a fuel supply channel and valve receptacles connected to the fuel supply channel, in which the fuel injection valves can be inserted in a sealing manner.
  • the electrical contact is made by means of plug-in elements which can be laterally plugged onto the housing of the fuel injection valves and are connected via contacting lines to electrical connecting lines running parallel to the fuel supply channel.
  • the electrical connection lines are arranged within a contact strip, which can be plugged onto the fuel distributor via a snap-in connection. This construction is also relatively complex and cumbersome, since the contact strip is separate from that Fuel distributor must be manufactured and the electrical connection lines must be inserted into the contact strip in a further manufacturing step.
  • the fuel distributor according to the invention with the characterizing features of the main claim has the advantage that no additional assembly step is required for the electrical contacting of the fuel injection valves. Rather, the electrical contact is made by inserting the fuel injection valves into the fuel distributor. This can save manufacturing costs, particularly in the case of automated assembly. Furthermore, the connection according to the invention between the fuel injection valves and the fuel distributor can be easily released again by pulling the fuel injection valves out of the valve receptacles of the fuel distributor. This increases the ease of repair of the fuel injection system in the event of a fuel injector failure.
  • the inventive integration of the electrical lines in and / or on the fuel distributor achieves a space-saving design of the fuel distributor and reduces the number of individual parts, which also reduces the manufacturing costs. It is also advantageous that the electrical lines integrated in the fuel distributor are well protected against negative external influences and damage.
  • the contact surfaces can be provided with depressions into which the contact springs snap. In this way, a simple, releasable locking of the fuel injection valves on the fuel distributor is achieved.
  • the electrical lines can be embedded, in particular injected, into the fuel distributor during manufacture.
  • one of the electrical lines can preferably line the inner surface of the wall of the fuel supply duct in a tubular manner, as a result of which both the stability of the fuel supply duct is increased and a large electrical line cross section is achieved.
  • Fig. 1 is a partial section through a fuel distributor according to the invention partially shown in side view and used in this
  • the fuel distributor 1 which has, for example, an elongated shape, is used to supply fuel to at least two, for example four, fuel injection valves 3.
  • the fuel distributor 1 has a number of valve receptacles 4 corresponding to the number of fuel injection valves 3 along its longitudinal extension in the direction of its longitudinal axis 2
  • the valve receptacles 4 are integrally formed on a fuel supply channel 5 formed in the longitudinal extension of the fuel distributor 1 of the fuel distributor 1, which is preferably produced by means of a plastic injection molding process.
  • valve receptacles 4 which extend, for example, at a right angle from the longitudinal extent of the fuel supply channel 5, have valve receptacle openings 6, into which connecting sections 7 of the fuel injection valves 3 can be inserted.
  • the connecting sections 7 are at least partially enclosed by the valve seats 4 after insertion into the valve receiving openings 6 and are sealed by means of a sealing ring 8.
  • the valve receiving openings 6 are in direct connection with the fuel supply channel 5 which runs transversely to the valve receiving openings 6 and which, for example, has a circular cross section.
  • the valve receiving openings 6 thus represent branch channels of the fuel supply channel 5.
  • top feed fuel injection valves are particularly suitable as fuel injection valves 3 for use on the fuel distributor 1 according to the invention, in which the fuel supply takes place via the end opposite the injection end.
  • a detailed description of the fuel injection valves 3 shown by way of example is dispensed with, since such a fuel injection valve 3 is already largely known, for example, from DE-OS 43 25 842.
  • other designs of known fuel injection valves can also be used on the fuel distributor 1 according to the invention.
  • the fuel injector 3 which can be used in the fuel distributor 1 according to the invention does not have any side connector on the housing of the fuel injector 3.
  • the connector is integrated in the form of contact surfaces 10, 11, which are axially offset with respect to the longitudinal axis 9 of the fuel injector 3, on the connecting section 7.
  • the connecting section 7 designed as a hollow body takes on not only the function of supplying the fuel, but also the function of the electrical contacting of the fuel injection valve 3.
  • Electrical lines 12, 13, 14 and 15 are integrated in or on the fuel distributor 1, which is preferably designed as a molded plastic part.
  • the electrical lines 12, 13 and 14 are designed as flat strips and are injected into the fuel distributor 1.
  • the electrical line 15, on the other hand, lines the inner surface of the wall 16 of the fuel supply duct 5 essentially completely in the form of a tube.
  • the tubular line 15 made of metal increases the bending stiffness of the fuel supply channel 5 and thus improves the dimensional stability of the fuel distributor 1. Furthermore, the large line cross section of the tubular line 15 results in a particularly low electrical line resistance.
  • All fuel injection valves 3 can be connected centrally via the tubular line 15 to a connection of a control device (not shown) which is used to control the fuel injection valves 3, while the fuel injection valves 3 can be connected to the circuit ground via the electrical lines 12 to 14 via the control device.
  • a control device not shown
  • a connector 17 can preferably be formed in one piece, which e.g. extends at a right angle to the longitudinal axis 2 of the fuel distributor 1, in particular along an elongated longitudinal axis 9 of a fuel injector 3.
  • the electrical lines 12, 13 and 14 designed as flat strips are largely surrounded by plastic and are therefore protected from external influences.
  • the tubular line 15 can be coated on the inside with a plastic or lacquer layer, not shown, in order to isolate the tubular line 15 to the fuel supply channel 5 and against harmful ones
  • both the valve receiving opening 6 and the connecting section 7 of the fuel injection valve 3 that can be inserted into the valve receiving opening 6 are of stepped construction.
  • a first clamping spring 20 is arranged in a first cylindrical step 19 of the valve receiving opening 6, while a second clamping spring 22 is provided in a second cylindrical step 21 of the valve receiving opening 6.
  • Steps 19 and 21 are arranged axially one behind the other and radially offset.
  • the stage 19 is located upstream of the stage 21 and has a smaller inner diameter than the stage 21.
  • the clamping springs 20 and 22 are at least partially circumferential around the associated step 19 and 21 of the valve receiving opening 6 and are preferably pressed into the latter.
  • the inner wall of the steps 19 and 21 is at least partially lined with the electrical conductors 15 and 14.
  • the electrical conductor 15 or 14 is not insulated from the inside of the respective stage 19 or 21, so that the associated clamping spring 20 or 22 with the corresponding electrical conductor 15 or
  • each clamping spring 20 or 22 with the associated electrical conductor 15 or 14 be additionally connected by soldering or welding.
  • Valve receiving opening 6 emerges at an undesired location.
  • the electrical line 14 is additionally insulated from the outside via an insulation layer 24, likewise preferably a plastic layer.
  • the connecting section 7 of each fuel injector 3, which can be inserted into the valve receiving opening 6, is also of stepped design in the exemplary embodiment and comprises the steps 25, 26 and 27. While the cylindrical step 27 of the axial guidance of the connecting section 7 in a step 28 following the steps 19 and 21 downstream serves the valve receiving opening 6, the cylindrical steps 25 and 26 have on their cylinder jacket surfaces the contact surfaces 10 and 11 already described, which are contacted by one of the clamping springs 20 and 22, respectively.
  • the cylindrical steps 27, 26 and 25 are formed with a diameter that tapers step by step in the direction of the inlet-side end of the connecting section 7.
  • the diameters of the steps 28, 21 and 19 of the valve receiving opening 6 taper in a corresponding manner counter to the fuel flow direction in the direction of the fuel supply channel 5.
  • the diameter of the step 28 of the valve receiving opening 6 has only a slightly larger diameter than the step 27 of the connecting section 7 of the fuel injector 3 to ensure axial guidance.
  • the difference in the diameter of the steps 25 and 26 of the connecting section 7 to the diameters of the steps 19 and 21 of the Ventil.öffmmg 6 and thus the distances between the contact surface 10 and the electrical conductor 15 or between the contact surface 11 and the electrical conductor 14 are dimensioned such that by the deformation of the contact springs 20 and 22 when the connecting section 7 is inserted into the valve receiving opening 6, a secure electrical contact between the clamping springs 20, 22 and the contact surfaces 10, 11 is produced.
  • the connecting section 7 has a hollow cylindrical shape and comprises a central longitudinal opening 29, which opens into the valve receiving opening 6 or the fuel supply channel 5 and through which the fuel flows to the fuel injection valve 3.
  • the connecting section 7 is built up in layers and comprises a hollow cylindrical core 30 made of an electrically conductive material, in particular made of metal, a first insulation layer 31 surrounding the hollow cylindrical core 30 on the outside, e.g. made of a plastic material, and a line layer 32 enclosing the first insulation layer 31 made of a conductive material, in particular made of metal.
  • An end section of the hollow cylindrical core 30 in the area of the contact surface 10 is not covered by the first insulation layer 31, so that the hollow cylindrical core 30 can be contacted by the contact spring 20 in this area.
  • the first insulation layer 31 with a ring section 38 of larger diameter closes the line layer 32 on its inlet end, in order to prevent a connection and thus a short circuit between the electrical line 15 and the line layer 32.
  • the line layer 32 can be surrounded on the outside outside the contact area 11 by a second insulation layer 33, which in the exemplary embodiment in the area of the step 27 of the connecting section 7 in cooperation with the step 28 of the valve receiving opening 6 simultaneously takes over the axial guidance of the connecting section 7.
  • the insulation layer 33 can also be the outer plastic encapsulation of the fuel injector 3.
  • the connecting section 7 When the connecting section 7 is inserted into the valve receiving opening 6, the inlet-side end face 34 of the step 26 strikes a stop surface 35 formed on the edge of the step 19.
  • the stepped design of the connecting section 7 and the valve receiving opening 6 therefore has the additional advantage that the end position of the connecting section 7 of the fuel injector 3 that can be inserted into the valve receiving opening 6 is clearly defined.
  • the contact surfaces 10, 11 are connected to the ends of the winding of a magnet coil 39, which is only shown schematically.
  • the contact surface 11 can be in the form of a sleeve or in the form of partial sleeves or one or more brackets which do not completely rotate.
  • FIG. 3 shows a representation corresponding to FIG. 2 with an advantageous development of the exemplary embodiment shown in FIGS. 1 and 2.
  • the elements already described with reference to FIGS. 1 and 2 have the same reference numerals, so that a description in this regard is unnecessary.
  • connection according to the invention of the fuel injection valves 3 to the fuel distributor 1 can also produce more than two electrical contacts.
  • 6 further clamping springs are to be provided in the valve receiving openings and 3 further contact surfaces are to be provided on the connecting sections 7 of the fuel injection valves.
  • the valve receiving openings 6 and the connecting sections 7 can also have further stages.
  • 3 projections can be made on the housing of the fuel injection valve, e.g. be provided in the form of sawtooth-like protruding lugs which snap into corresponding openings in the valve receptacles 4.
  • An anti-rotation device can also be provided in order to ensure a clear installation position of the fuel injection valves 3, which is necessary in particular in the case of so-called two-jet valves.

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

La présente invention porte sur un distributeur de carburant destiné à des systèmes à injection de moteurs à combustion interne pour l'alimentation d'au moins deux soupapes injectrices, comprenant un conduit d'alimentation et autant de logements de soupapes qu'il y a de soupapes injectrices. Chaque logement de soupape présente une ouverture directement reliée au conduit d'alimentation, dans laquelle on peut placer les sections de raccordement des soupapes injectrices. Avec ce nouveau type de distributeur, les connexions électriques (12, 13, 14, 15) sont directement intégrées pour le raccordement avec les soupapes injectrices (3) à l'intérieur et/ou sur le distributeur de carburant (1) et vont jusqu'aux ouvertures des logements de soupape (6). Dans chaque ouverture de logement de soupape (6) sont placés des ressorts de contact (20, 22) de sorte que, une fois installée la section de raccordement (7) de l'une des soupapes injectrices (3), ces ressorts touchent des surfaces de contact (10, 12) prévues sur la section de raccordement (7), désaxées les unes par rapport aux autres, vues dans l'axe longitudinal (9) de la soupape injectrice (3).
EP97941817A 1996-09-26 1997-08-23 Distributeur de carburant Expired - Lifetime EP0862689B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19639585A DE19639585A1 (de) 1996-09-26 1996-09-26 Brennstoffverteiler
DE19639585 1996-09-26
PCT/DE1997/001835 WO1998013600A1 (fr) 1996-09-26 1997-08-23 Distributeur de carburant

Publications (2)

Publication Number Publication Date
EP0862689A1 true EP0862689A1 (fr) 1998-09-09
EP0862689B1 EP0862689B1 (fr) 2003-03-26

Family

ID=7806977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97941817A Expired - Lifetime EP0862689B1 (fr) 1996-09-26 1997-08-23 Distributeur de carburant

Country Status (7)

Country Link
US (1) US6062200A (fr)
EP (1) EP0862689B1 (fr)
JP (1) JP2000502421A (fr)
KR (1) KR100583900B1 (fr)
BR (1) BR9706767A (fr)
DE (2) DE19639585A1 (fr)
WO (1) WO1998013600A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE19820901A1 (de) 1998-05-09 1999-11-11 Zahnradfabrik Friedrichshafen Elektrische Steckverbindung
JP3841330B2 (ja) * 1999-05-31 2006-11-01 住友電装株式会社 インジェクタ用コネクタブロック
US6338333B1 (en) * 1999-06-10 2002-01-15 Delphi Technologies, Inc. Integrated fuel delivery module for direct injection
US6564775B1 (en) 1999-08-03 2003-05-20 Aisan Kogyo Kabushiki Kaisha Fuel delivery pipes
DE19942990A1 (de) * 1999-09-09 2001-03-22 Bosch Gmbh Robert Common-Rail-Injektor
US6314943B1 (en) * 1999-10-22 2001-11-13 Ford Global Technologies, Inc. Fuel supply rail with integrated fuel injector load spring
DE10025043A1 (de) * 2000-05-20 2001-11-22 Bosch Gmbh Robert Kraftstoffrücklaufeinrichtung
US6626152B1 (en) * 2000-09-19 2003-09-30 Delphi Technologies, Inc. Fuel rail
KR20020030348A (ko) * 2000-10-17 2002-04-25 이계안 내연기관의 인젝션 장치
DE10056038A1 (de) * 2000-11-11 2002-05-16 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE10061706A1 (de) * 2000-12-12 2002-06-27 Siemens Ag Anordnung zum lösbaren Befestigen einer Ansaugvorrichtung am Zylinderkopf
US6640784B1 (en) * 2002-10-09 2003-11-04 Robert Bosch Corporation Spark ignition direct injection system
US6666190B1 (en) * 2003-01-03 2003-12-23 Ford Global Technologies, Llc Integrated fuel delivery and electrical connection for electronic fuel injectors
EP1529955A1 (fr) * 2003-11-06 2005-05-11 Renault s.a.s. Moyens de serrage d'un injecteur de carburant
US6904895B1 (en) * 2004-02-10 2005-06-14 Eaton Corporation Electro-hydraulic manifold assembly and method of making same
JP4546849B2 (ja) * 2005-02-14 2010-09-22 三桜工業株式会社 管体のシール構造
EP2187039B1 (fr) * 2005-03-03 2014-05-07 Robert Bosch GmbH Dispositif d'injection de carburant
US7523741B2 (en) * 2005-03-30 2009-04-28 Kurz - Kasch, Inc. Fuel rail
KR100653167B1 (ko) 2005-12-09 2006-12-04 (주)모토닉 차량용 인젝터의 설치구조
US20090013968A1 (en) * 2007-07-09 2009-01-15 Keegan Kevin R Vapor recovery system for a direct injector fuel rail assembly
EP2058509B1 (fr) * 2007-11-12 2012-07-18 Continental Automotive GmbH Raccord
EP2348586A1 (fr) * 2010-01-20 2011-07-27 Delphi Technologies Holding S.à.r.l. Appareil pour connexion électrique
JP6182905B2 (ja) * 2013-03-01 2017-08-23 株式会社デンソー 燃料レール
WO2017102173A1 (fr) * 2015-12-14 2017-06-22 Robert Bosch Gmbh Injecteur de carburant comprenant un mécanisme d'électrovanne rotative
DE102017108270B4 (de) * 2017-04-19 2023-11-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Dichtungskassette für einen Injektor einer Verbrennungskraftmaschine und Injektoranordnung für eine Verbrennungskraftmaschine
JP6796022B2 (ja) * 2017-04-26 2020-12-02 三桜工業株式会社 気密栓及び気密検査装置

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JP3316148B2 (ja) * 1996-03-01 2002-08-19 愛三工業株式会社 燃料分配装置
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Also Published As

Publication number Publication date
WO1998013600A1 (fr) 1998-04-02
DE19639585A1 (de) 1998-04-02
KR19990071556A (ko) 1999-09-27
EP0862689B1 (fr) 2003-03-26
DE59709630D1 (de) 2003-04-30
BR9706767A (pt) 1999-07-20
JP2000502421A (ja) 2000-02-29
KR100583900B1 (ko) 2006-10-11
US6062200A (en) 2000-05-16

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