EP0306739A2 - Device for mounting, supplying fuel to and electrically connecting electromagnetic fuel injectors together - Google Patents

Device for mounting, supplying fuel to and electrically connecting electromagnetic fuel injectors together Download PDF

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Publication number
EP0306739A2
EP0306739A2 EP88113310A EP88113310A EP0306739A2 EP 0306739 A2 EP0306739 A2 EP 0306739A2 EP 88113310 A EP88113310 A EP 88113310A EP 88113310 A EP88113310 A EP 88113310A EP 0306739 A2 EP0306739 A2 EP 0306739A2
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EP
European Patent Office
Prior art keywords
fuel injection
base body
injection valves
fuel
receiving bores
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
EP88113310A
Other languages
German (de)
French (fr)
Other versions
EP0306739A3 (en
EP0306739B1 (en
Inventor
Helmut Dipl.-Ing.(Fh) Bassler
Karl Dipl.-Ing. Gmelin
Heinz Ehrentraut
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT88113310T priority Critical patent/ATE64440T1/en
Publication of EP0306739A2 publication Critical patent/EP0306739A2/en
Publication of EP0306739A3 publication Critical patent/EP0306739A3/en
Application granted granted Critical
Publication of EP0306739B1 publication Critical patent/EP0306739B1/en
Anticipated expiration legal-status Critical
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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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of 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
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit
    • 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
    • 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
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • 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

Definitions

  • the invention relates to a device according to the preamble of the main claim.
  • a device is already known (DE-OS 32 28 508) in which the individual fuel injection valves are received in individual receiving bores of a base body made of plastic, but disadvantageously have to be individually fastened therein and electrically contacted.
  • the device according to the invention with the characterizing features of the main claim has the advantage that all the fuel injection valves arranged in the base body can be electrically contacted by means of a contact strip and held in the base body at the same time, so that this compact assembly enables simultaneous testing of the fuel injection valves and subsequent joint fastening on the intake pipe or the internal combustion engine itself. Compared to the prior art, this eliminates the need for individual electrical cables and connectors on the individual Fuel injection valves and individual clamps for holding the individual fuel injection valves in the base body.
  • the contact strip made of plastic and to provide it with an elastic snap-in connection which allows a connection to the base body.
  • a latching connection ensures a quick fixation of the base body and the contacting strip to one another, but this can also be released quickly and easily.
  • the ras connection prevents the device from opening in the dirty engine compartment, so that the required work can be carried out in the desired manner in a clean workplace.
  • FIG. 1 shows a device according to the invention, shown partly in section
  • FIG. 2 shows a section along the line II-II in FIG. 1
  • FIG. 3 shows a section along the line III-III in FIG. 1
  • FIG. 4 shows a plan view of the device according to the invention
  • FIG. 5 2 shows a device cut along the line VV in FIG. 1 in the installed position on the internal combustion engine
  • FIG. 6 shows a device cut along the line VI-VI in FIG. 1 with a pressure regulator.
  • 1 denotes a base body which is advantageously designed as a plastic injection molded part.
  • a connecting piece 2 for a fuel supply line 3 which is connected to a fuel supply source (not shown) (for example a fuel pump which delivers fuel from a fuel tank).
  • a connection piece 4 is attached to the base body 1, preferably at the end facing away from the connection piece 2, into which a return flow line 5 opens, and which is connected to the suction side of the fuel pump or the fuel tank.
  • a holding bore 8 is provided, into which a pressure control valve 9 of a known type is inserted.
  • connection channel 10 from the fuel supply line 3 to the holding bore 8, from which an opening, not shown, leads into the interior of the pressure control valve 9.
  • the regulated fuel in the pressure regulating valve 9 flows through a valve stub 11 of the pressure regulating valve 9 into a connecting line 12 to the connecting stub 4.
  • the fuel supply line 3 and the return flow line 5 open into the connecting duct 10 downstream of all fuel injection valves.
  • stepped receiving bores 15 are formed for guiding fuel injection valves 14 for fuel injection systems of internal combustion engines, each of which surrounds a fuel injection valve 14 and are open on both sides.
  • four receiving bores 15 are formed in the base body 1, which are used to receive four fuel injection valves.
  • Each receiving bore 15 has a coin in the vicinity of a support surface 16 of the base body 1 for guiding an injection nozzle 17 of the fuel injection valve 14 Opening 18.
  • the mounting bores 15 are formed around the holding flanges 21, which are provided with two clamping openings 22, for example.
  • the device also has a contact strip 24, which is also designed to be dimensionally stable, for example made of plastic, and on which connectors 25 are arranged, of which each connector 25 is assigned to a fuel injection valve 14 and is used to make electrical contact with it.
  • a blind hole-shaped plug opening 26 is provided in the contact strip 24 for each plug 25, which is open to a strip end face 27.
  • First electrically conductive contact elements 28, for example in the form of known flat plugs, are arranged in the plugs 25 and are connected to electrical conductors 29 arranged in the contact strip 24.
  • the electrical conductors 29 can, for example, be in the form of a band and cast in the contacting strip 24 made of plastic.
  • a connector 30 is also arranged on the contact strip, with which the individual electrical conductors 29 are connected and electrical control signals for the fuel injection valves can be input via the known type of electronic control device, not shown.
  • all the electrical conductors 29 run to the individual plugs 25 within the contact strip 24 and branch off there to the individual first electrically conductive contact elements 28.
  • strip holding flanges 32 are formed on the strip end face, in which clamping openings 33 are provided.
  • Two resiliently guided locking arms 34 which are preferably formed during the manufacture of the contacting strip, protrude from the end face 27 of the strip.
  • a fuel injection valve 14 is inserted into each receiving bore 15 of the base body 1, which has a collar 36 on one not shown placed shoulder of the receiving bore 15 or in the manner shown comes to rest on the end face 20 of the base body 1 and its second electrically conductive contact elements 37, which are designed as plug contacts, protrude from the base body 1.
  • the fuel injection valve is provided in the vicinity of the injection opening 17 with a sealing ring 38 which, on the other hand, bears against the opening 18.
  • the fuel injection valve surrounds a further sealing ring 39, which seals the receiving bore 15 towards the collar 36.
  • the first electrically conductive contact elements 28 de contacting strip 24 slide over the second electrically conductive contact elements 37 of each fuel injection valve 14 and thereby simultaneously ensure the electrical contacting of the fuel injection valves.
  • a clamping force is exerted on the fuel injection valves in the axial direction by the contacting strip 24, for example by a clamping ring groove 40 of the contacting strip 24 engaging the collar 36 of the fuel injection valve and exerting a clamping force on this collar in the direction of the end face 20 of the base body 1 so that each fuel injector is fixed in position.
  • the locking arms 34 engage in locking openings 42 of the base body 1 and engage behind with a locking lug 43 a locking edge 44 of the base body 1 to form a base body 1 and contacting power 24 holding together locking connection.
  • a sealing ring 46 is arranged in a sealing groove 45 of the contacting strip 24 which is open towards the end face 27 of the strip and which surrounds a fuel injection valve in each case and prevents it from fitting against the end face 20 of the base body 1 in the assembled state, preventing dirt and moisture from the outside from being arranged in the receiving bores 15 Fuel injectors arrives. Acting in the same way, a sealing ring could be provided, which surrounds all fuel injection valves at the same time.
  • the fuel supply line 3 and the return flow line 5 are each guided in the base body 1 in such a way that they are open to the individual receiving bores 15.
  • a sieve body 48 is placed on the fuel injection valve 14, one edge 49 of which lies radially against the wall of the receiving bore 15 and extends between the fuel supply line 3 and the return flow line 5, so that the receiving bore 15 is divided into two separate rooms.
  • the fuel supplied via the fuel supply line 3 reaches the inside of each fuel injection valve via openings and can be partially sprayed from there via the injection nozzle 17 and partly flow upwards and exit via further openings into the region of the receiving bore 15, which is from the return flow line 5 is touched.
  • the separate return flow line 5 can be omitted.
  • the device assembled from the base body 1 and the contacting strip 24 and provided with the fuel injection valves 14 can now be arranged together in a test device in which the spray behavior of the individual fuel injection valves is checked. If all fuel injection valves meet the specified guide values, this finished device can be attached as a whole to the internal combustion engine or to the intake pipe of the internal combustion engine, depending on the given configurations.
  • the assembled device with the bearing surface 16 of the base body 1 is placed on a bearing surface 50 of the internal combustion engine or the air intake pipe 51 and 32 screws 52 are inserted through the mutually aligned clamping openings 22 and 33 of the holding flanges 21 and the strip holding flanges, with which the device on the Internal combustion engine or screwed to the intake pipe 51 of the internal combustion engine and is thus fastened.
  • Sealing grooves 53 which are open toward the bearing surface 16, serve to receive sealing rings 54 and seal between the bearing surface 16 of the base body 1 and of the contact surface 50 by surrounding the injection openings 55 formed in the intake pipe 51, into each of which an injection nozzle 17 of a fuel injection valve projects.
  • the pressure control valve 9 can also be attached to the device from the outset, in order to mount it on the internal combustion engine when the device is attached. On the other hand, of course, the pressure control valve 9 can also be inserted into and fixed to the device separately after mounting the device on the internal combustion engine.
  • the assembled device now only needs to be connected to the fuel source and to an electrical plug which supplies the control signals for the individual fuel injection valves coming from the electronic control unit via the common connector plug 30.

Abstract

In known devices, the fuel injection valves, disposed in individual receiving bores, are retained individually with clamping shoes, and electrical contact is provided by individual electric plugs. The novel device is intended to assure that all the fuel injection valves are retained and provided with electrical contact simultaneously. The fuel injection valves inserted into receiving bores of a basic body are retained in common in the receiving bores by means of a contact-making outlet strip, slipped onto the basic body, and are electrically connected in common by means of electrically conductive contact elements. The entire compact device can be fastened as a unit to the engine and electrically connected, via a connection plug to an electronic control unit for trigging the fuel injection valves. The device makes adaptation to various engine types possible.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Vorrichtung nach der Gattung des Hauptanspruchs. Es ist schon eine Vorrichtung bekannt (DE-OS 32 28 508), bei der die einzelnen Kraftstoffeinspritzventile zwar in einzelnen Aufnahmebohrungen eines aus Kunstsoff ausgebildeten Grundkörpers aufgenommen werden, aber in nachteiliger Weise einzeln darin befestigt und elektrisch kontaktiert werden müssen.The invention relates to a device according to the preamble of the main claim. A device is already known (DE-OS 32 28 508) in which the individual fuel injection valves are received in individual receiving bores of a base body made of plastic, but disadvantageously have to be individually fastened therein and electrically contacted.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß alle in dem Grundkörper angeordneten Kraftstoffeinspritzventile gleichzeitig mittels einer Kontaktierungsleiste elektrisch kontaktiert und in dem Grundkörper gehalten werden können, so daß diese kompakte Baugruppe eine gleichzeitige Prüfung der Kraftstoffeinspritzventile und eine anschließende gemeinsame Befestigung am Ansaugrohr oder der Brenn­kraftmaschine selbst ermöglicht. Damit entfallen gegenüber dem Stand der Technik einzelne elektrische Kabel und Stecker an den einzelnen Kraftstoffeinspritzventilen sowie einzelne Spannpratzen zum Halten der einzelnen Kraftstoffeinspritzventile in dem Grundkörper.The device according to the invention with the characterizing features of the main claim has the advantage that all the fuel injection valves arranged in the base body can be electrically contacted by means of a contact strip and held in the base body at the same time, so that this compact assembly enables simultaneous testing of the fuel injection valves and subsequent joint fastening on the intake pipe or the internal combustion engine itself. Compared to the prior art, this eliminates the need for individual electrical cables and connectors on the individual Fuel injection valves and individual clamps for holding the individual fuel injection valves in the base body.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vor­teilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Vorrichtung möglich.Advantageous further developments and improvements of the device specified in the main claim are possible through the measures listed in the subclaims.

Vorteilhaft ist es, die Kontaktierungsleiste aus Kunststoff auszu­bilden und mit einer elastischen Rastverbindung zu versehen, die eine Verbindung mit dem Grundkörper erlaubt. Eine derartige Rastver­bindung gewährleistet eine schnelle Fixierung von Grundkörper und Kontaktierungsleiste aneinander, die jedoch auch schnell und leicht gelöst werden kann. Die Rasverbindung verhindert jedoch ein Öffnen der Vorrichtung im schmutzigen Motorraum, so daß erforderliche Ar­beiten in gewünschter Weise an einem sauberen Arbeitsplatz erfolgen können.It is advantageous to form the contact strip made of plastic and to provide it with an elastic snap-in connection which allows a connection to the base body. Such a latching connection ensures a quick fixation of the base body and the contacting strip to one another, but this can also be released quickly and easily. However, the ras connection prevents the device from opening in the dirty engine compartment, so that the required work can be carried out in the desired manner in a clean workplace.

Vorteilhaft ist es ebenfalls, in dem Grundkörper einen Aufnahme­flansch für ein Druckregelventil vorzusehen, so daß der Druckregler ebenfalls als Teil der Baugruppe mit der Baugruppe an der Brenn­kraftmaschine befestigt werden kann.It is also advantageous to provide a receiving flange for a pressure regulating valve in the base body, so that the pressure regulator can also be attached to the internal combustion engine as part of the assembly with the assembly.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung verein­facht dargestellt und in der nachfolgenden Beschreibung näher erläu­tert. Es zeigen Figur 1 eine teilweise geschnitten dargestellte er­findungsgemäße Vorrichtung, Figur 2 einen Schnitt entlang der Linie II-II in Figur 1, Figur 3 einen Schnitt entlang der Linie III-III in Figur 1, Figur 4 eine Draufsicht auf die erfindungsgemäße Vorrich­tung, Figur 5 einen entlang der Linie V-V in Figur 1 geschnittene Vorrichtung in Einbaulage an der Brennkraftmaschine, Figur 6 eine entlang der Linie VI-VI in Figur 1 geschnittene Vorrichtung mit ei­nem Druckregler.An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. 1 shows a device according to the invention, shown partly in section, FIG. 2 shows a section along the line II-II in FIG. 1, FIG. 3 shows a section along the line III-III in FIG. 1, FIG. 4 shows a plan view of the device according to the invention, FIG. 5 2 shows a device cut along the line VV in FIG. 1 in the installed position on the internal combustion engine, FIG. 6 shows a device cut along the line VI-VI in FIG. 1 with a pressure regulator.

Beschreibung des AusführungsbeispielesDescription of the embodiment

Bei dem in den Figuren 1 bis 6 dargestellten Ausführungsbeispiel der erfindungsgemäßen Vorrichtung ist mit 1 ein Grundkörper bezeichnet, der vorteilhafterweise als Kunststoff-Spritzgußteil ausgebildet ist. An dem Grundkörper 1 ist ein Anschlußstutzen 2 für eine Kraftstoff­versorgungsleitung 3 vorgesehen, der mit einer nicht dargestellten Kraftstoffversorgungsquelle in Verbindung steht (beispielsweise ei­ner Kraftstoffpumpe, die Kraftstoff aus einem Kraftstoffbehälter fördert). Weiterhin ist an dem Grundkörper 1 ein Anschlußstutzen 4 angebracht, vorzugsweise am dem Anschlußstutzen 2 abgewandten Ende, in den eine Rückströmleitung 5 mündet, und der mit der Saugseite der Kraftstoffpumpe oder dem Kraftstoffbehälter verbunden ist. In einem Aufnahmeflansch 7 des Grundkörpers 1 ist eine Haltebohrung 8 vorge­sehen, in die ein Druckregelventil 9 bekannter Bauart eingesetzt ist. Dabei besteht ein Verbindungskanal 10 von der Kraftstoffversor­gungsleitung 3 zur Haltebohrung 8, von der aus eine nicht darge­stellte Öffnung in das Innere des Druckregelventiles 9 führt. Der im Druckregelventil 9 abgeregelte Kraftstoff strömt über einen Ventil­stutzen 11 des Druckregelventils 9 in eine Verbindungsleitung 12 zum Anschlußstutzen 4. Dabei münden die Kraftstoffversorgungsleitung 3 und die Rückströmleitung 5 stromabwärts aller Kraftstoffeinspritz­ventile in den Verbindungskanal 10.In the embodiment of the device according to the invention shown in FIGS. 1 to 6, 1 denotes a base body which is advantageously designed as a plastic injection molded part. Provided on the base body 1 is a connecting piece 2 for a fuel supply line 3, which is connected to a fuel supply source (not shown) (for example a fuel pump which delivers fuel from a fuel tank). Furthermore, a connection piece 4 is attached to the base body 1, preferably at the end facing away from the connection piece 2, into which a return flow line 5 opens, and which is connected to the suction side of the fuel pump or the fuel tank. In a receiving flange 7 of the base body 1, a holding bore 8 is provided, into which a pressure control valve 9 of a known type is inserted. There is a connection channel 10 from the fuel supply line 3 to the holding bore 8, from which an opening, not shown, leads into the interior of the pressure control valve 9. The regulated fuel in the pressure regulating valve 9 flows through a valve stub 11 of the pressure regulating valve 9 into a connecting line 12 to the connecting stub 4. The fuel supply line 3 and the return flow line 5 open into the connecting duct 10 downstream of all fuel injection valves.

In dem formsteifen Grundkörper 1 sind zur Führung von Kraftstoffein­spritzventilen 14 für Kraftstoffeinspritzanlagen von Brennkraft­maschinen abgestufte Aufnahmebohrungen 15 ausgebildet, die je ein Kraftstoffeinspritzventil 14 umschließen und beiderseits offen sind. Beim dargestellten Ausführungsbeispiel sind vier Aufnahmebohrungen 15 im Grundkörper 1 ausgebildet, die zur Aufnahme von vier Kraft­stoffeinspritzventilen dienen. Jede Aufnahmebohrung 15 hat in der Nähe einer Auflagefläche 16 des Grundkörpers 1 für die Führung eines Einspritzmundstückes 17 des Kraftstoffeinspritzventiles 14 eine Mün­ dungsöffnung 18. An der der Auflagefläche 16 gegenüberliegenden Stirnfläche 20 des Grundkörpers 1 sind beispielsweise die Aufnahme­bohrungen 15 umgebende Halteflansche 21 ausgebildet, die beispiels­weise mit zwei Einspannöffnungen 22 versehen sind.In the dimensionally stable base body 1, stepped receiving bores 15 are formed for guiding fuel injection valves 14 for fuel injection systems of internal combustion engines, each of which surrounds a fuel injection valve 14 and are open on both sides. In the illustrated embodiment, four receiving bores 15 are formed in the base body 1, which are used to receive four fuel injection valves. Each receiving bore 15 has a coin in the vicinity of a support surface 16 of the base body 1 for guiding an injection nozzle 17 of the fuel injection valve 14 Opening 18. On the end face 20 of the base body 1 opposite the bearing surface 16, for example the mounting bores 15 are formed around the holding flanges 21, which are provided with two clamping openings 22, for example.

Die Vorrichtung weist weiterhin eine Kontaktierungsleiste 24 auf, die ebenfalls formsteif ausgebildet ist, beispielsweise aus Kunst­stoff, und an der Stecker 25 angeordnet sind, von denen jeder Stecker 25 einem Kraftstoffeinspritzventil 14 zugeordnet ist und zu dessen elektrischer Kontaktierung dient. Hierfür ist in der Kontak­tierungsleiste 24 für jeden Stecker 25 eine sacklochförmige Stecker­öffnung 26 vorgesehen, die zu einer Leistenstirnfläche 27 hin offen ist. In den Steckern 25 sind erste elektrisch leitende Kontaktele­mente 28, beispielsweise in Form bekannter Flachstecker, angeordnet, die mit in der Kontaktierungsleiste 24 angeordneten elektrischen Leitern 29 verbunden sind. Die elektrischen Leiter 29 können z.B. bandförmig ausgebildet und in der aus Kunststoff gefertigen Kontak­tierungsleiste 24 eingegossen sein. An der Kontaktierungsleiste ist weiterhin ein Anschlußstecker 30 angeordnet, mit dem die einzelnen elektrischen Leiter 29 verbunden sind und über den von einem nicht dargestellten elektronischen Steuergerät bekannter Bauart elektri­sche Ansteuersignale für die Kraftstoffeinspritzventile eingebbar sind. Somit verlaufen vom Anschlußstecker 30 ausgehend alle elektri­schen Leiter 29 zu den einzelnen Steckern 25 innerhalb der Kontak­tierungsleiste 24 und zweigen dort zu den einzelnen ersten elek­trisch leitenden Kontaktelementen 28 ab. Jede Steckeröffnung 26 um­gebend sind an der Leistenstirnfläche Leistenhalteflansche 32 ausge­bildet, in denen Einspannöffnungen 33 vorgesehen sind. Aus der Lei­stenstirnfläche 27 ragen mit Abstand zueinander zwei federnd ge­führte, vorzugsweise bei der Herstellung der Kontaktierungsleiste angeforme Rastarme 34 heraus. Zur Montage der Vorrichtung wird in jede Aufnahmebohrung 15 des Grundkörpers 1 ein Kraftstoffeinspritz­ventil 14 eingesetzt, das mit einem Kragen 36 an einer nicht darge­ stellten Schulter der Aufnahmebohrung 15 oder in dargestellter Weise an der Stirnfläche 20 des Grundkörpers 1 zum Anliegen kommt und des­sen als Steckkontakte ausgebildete zweite elektrisch leitende Kon­taktelemente 37 aus dem Grundkörper 1 herausragen. Das Kraftstoff­einspritzventil ist in der Nähe der Einspritzmündung 17 mit einem Dichtring 38 versehen, der andererseits an der Mündungsöffnung 18 anliegt. Zur Stirnfläche 20 hin umgibt das Kraftstoffeinspritzventil ein weiterer Dichtring 39, der die Aufnahmebohrung 15 zum Kragen 36 hin abdichtet. Beim Aufsetzen der Kontaktierungsleiste 24 mit seiner Leistenstirnfläche 27 auf die Stirnfläche 20 des Grundkörpers 1 gleiten die ersten elektrisch leitenden Kontaktelemente 28 de Kon­taktierungsleiste 24 über die zweiten elektrisch leitenden Kontakt­elemente 37 jedes Kraftstoffeinspritzventiles 14 und stellen dadurch gleichzeitig die elektrische Kontaktierung der Krafstoffeinspritz­ventile sicher. Zugleich mit dieser elektrischen Kontaktierung wird durch die Kontaktierungsleiste 24 eine Einspannkraft in axialer Richtung auf die Kraftstoffeinspritzventile ausgeübt, indem bei­spielsweise eine Einspannringnut 40 der Kontaktierungsleiste 24 am Kragen 36 des Kraftstoffeinspritzventiles angreift und auf diesen Kragen eine Einspannkraft in Richtung zur Stirnfläche 20 des Grund­körpers 1 hin ausübt, so daß jedes Kraftstoffeinspritzventil in sei­ner Lage fixiert wird. Weiterhin greifen bei der Montage der Kontak­tierungsleiste 24 an dem Grundkörper 1 die Rastarme 34 in Rastöff­nungen 42 des Grundkörpers 1 und hintergreifen mit einer Rastnase 43 eine Rastkante 44 des Grundkörpers 1 unter Bildung einer Grundkörper 1 und Kontaktierungsleistung 24 zusammenhaltenden Rastverbindung. In einer zur Leistenstirnfläche 27 hin offenen Dichtnut 45 der Kontak­tierungsleiste 24 ist ein Dichtring 46 angeordnet, der jeweils ein Kraftstoffeinspritzventil umgibt und an der Stirnfläche 20 des Grundkörpers 1 anliegend im montierten Zustand verhindert, das von außen Schmutz und Feuchtigkeit zu den in den Aufnahmebohrungen 15 angeordneten Krafstoffeinspritzventilen gelangt. In gleicher Weise wirkend könnte ein Dichtring vorgesehen sein, der alle Kraftstoff­einspritzventile zugleich umgibt.The device also has a contact strip 24, which is also designed to be dimensionally stable, for example made of plastic, and on which connectors 25 are arranged, of which each connector 25 is assigned to a fuel injection valve 14 and is used to make electrical contact with it. For this purpose, a blind hole-shaped plug opening 26 is provided in the contact strip 24 for each plug 25, which is open to a strip end face 27. First electrically conductive contact elements 28, for example in the form of known flat plugs, are arranged in the plugs 25 and are connected to electrical conductors 29 arranged in the contact strip 24. The electrical conductors 29 can, for example, be in the form of a band and cast in the contacting strip 24 made of plastic. A connector 30 is also arranged on the contact strip, with which the individual electrical conductors 29 are connected and electrical control signals for the fuel injection valves can be input via the known type of electronic control device, not shown. Thus, starting from the connector 30, all the electrical conductors 29 run to the individual plugs 25 within the contact strip 24 and branch off there to the individual first electrically conductive contact elements 28. Surrounding each plug opening 26, strip holding flanges 32 are formed on the strip end face, in which clamping openings 33 are provided. Two resiliently guided locking arms 34, which are preferably formed during the manufacture of the contacting strip, protrude from the end face 27 of the strip. To assemble the device, a fuel injection valve 14 is inserted into each receiving bore 15 of the base body 1, which has a collar 36 on one not shown placed shoulder of the receiving bore 15 or in the manner shown comes to rest on the end face 20 of the base body 1 and its second electrically conductive contact elements 37, which are designed as plug contacts, protrude from the base body 1. The fuel injection valve is provided in the vicinity of the injection opening 17 with a sealing ring 38 which, on the other hand, bears against the opening 18. Towards the end face 20, the fuel injection valve surrounds a further sealing ring 39, which seals the receiving bore 15 towards the collar 36. When the contacting strip 24 is placed with its strip end face 27 on the end face 20 of the base body 1, the first electrically conductive contact elements 28 de contacting strip 24 slide over the second electrically conductive contact elements 37 of each fuel injection valve 14 and thereby simultaneously ensure the electrical contacting of the fuel injection valves. Simultaneously with this electrical contacting, a clamping force is exerted on the fuel injection valves in the axial direction by the contacting strip 24, for example by a clamping ring groove 40 of the contacting strip 24 engaging the collar 36 of the fuel injection valve and exerting a clamping force on this collar in the direction of the end face 20 of the base body 1 so that each fuel injector is fixed in position. Furthermore, when mounting the contact strip 24 on the base body 1, the locking arms 34 engage in locking openings 42 of the base body 1 and engage behind with a locking lug 43 a locking edge 44 of the base body 1 to form a base body 1 and contacting power 24 holding together locking connection. A sealing ring 46 is arranged in a sealing groove 45 of the contacting strip 24 which is open towards the end face 27 of the strip and which surrounds a fuel injection valve in each case and prevents it from fitting against the end face 20 of the base body 1 in the assembled state, preventing dirt and moisture from the outside from being arranged in the receiving bores 15 Fuel injectors arrives. Acting in the same way, a sealing ring could be provided, which surrounds all fuel injection valves at the same time.

Die Kraftstoffversorgungsleitung 3 und die Rückströmleitung 5 sind jeweils so im Grundkörper 1 geführt, daß sie zu den einzelnen Auf­nahmebohrungen 15 hin offen sind. Auf das Kraftstoffeinspritzventil 14 ist beispielsweise ein Siebkörper 48 aufgesetzt, dessen einer Rand 49 radial an der Wandung der Aufnahmebohrung 15 anliegt und zwischen der Kraftstoffversorgungsleitung 3 und der Rückströmleitung 5 verläuft, so daß die Aufnahmebohrung 15 in zwei getrennte Räume aufgeteilt wird. Der über die Kraftstoffversorgungsleitung 3 zuge­führte Kraftstoff gelangt über Öffnungen ins Innere jedes Kraft­stoffeinspritzventiles und kann von dort zum Teil über das Ein­spritzmundstück 17 abgespritzt werden und zum anderen Teil nach oben strömen und über weitere Öffnungen in den Bereich der Aufnahmeboh­rung 15 austreten, der von der Rückströmleitung 5 berührt wird. In einer vereinfachten Ausführungsform kann die getrennte Rückströmlei­tung 5 entfallen.The fuel supply line 3 and the return flow line 5 are each guided in the base body 1 in such a way that they are open to the individual receiving bores 15. For example, a sieve body 48 is placed on the fuel injection valve 14, one edge 49 of which lies radially against the wall of the receiving bore 15 and extends between the fuel supply line 3 and the return flow line 5, so that the receiving bore 15 is divided into two separate rooms. The fuel supplied via the fuel supply line 3 reaches the inside of each fuel injection valve via openings and can be partially sprayed from there via the injection nozzle 17 and partly flow upwards and exit via further openings into the region of the receiving bore 15, which is from the return flow line 5 is touched. In a simplified embodiment, the separate return flow line 5 can be omitted.

Die aus dem Grundkörper 1 und der Kontaktierungsleiste 24 zusammen­gefügte und mit den Kraftstoffeinspritzventilen 14 versehene Vor­richtung kann nun gemeinsam in einer Prüfeinrichtung angeordnet wer­den, in der das Abspritzverhalten der einzelnen Kraftstoffeinspritz­ventile überprüft wird. Entsprechen alle Kraftstoffeinspritzventile den vorgegebenen Richtwerten, so kann diese nun fertige Vorrichtung als ganzes an der Brennkraftmaschine bzw. am Ansaugrohr der Brenn­kraftmaschine je nach den gegebenen Ausgestaltungen angebracht wer­den. Hierfür wird die montierte Vorrichtung mit der Auflagefläche 16 des Grundkörpers 1 auf eine Anlagefläche 50 der Brennkraftmaschine bzw. des Luftansaugrohres 51 aufgesetzt und durch die zueinander fluchtenden Einspannöffnungen 22 und 33 der Halteflansche 21 und der Leistenhalteflansche 32 Schrauben 52 gesteckt, mit denen die Vor­richtung an der Brennkraftmaschine bzw. am Ansaugrohr 51 der Brenn­kraftmaschine verschraubt und damit befestigt wird. Zur Auflageflä­che 16 hin offene Dichtnuten 53 dienen zur Aufnahme von Dichtringen 54 und dichten zwischen der Auflagefläche 16 des Grundkörpers 1 und der Anlagefläche 50 ab, indem sie die in dem Ansaugrohr 51 ausgebil­deten Einspritzöffnungen 55 umgeben, in die je ein Einspritzmün­dungsstück 17 eines Kraftstoffeinspritzventiles ragt. Das Druckre­gelventil 9 kann ebenfalls an der Vorrichtung von vornherein befe­stigt werden, um es zugleich mit der Befestigung der Vorrichtung an der Brennkraftmaschine daran zu montieren. Andererseits kann natür­lich das Druckregelventil 9 auch separat nach Montage der Vorrich­tung an der Brennkraftmaschine in die Vorrichtung eingesetzt und da­ran befestigt werden.The device assembled from the base body 1 and the contacting strip 24 and provided with the fuel injection valves 14 can now be arranged together in a test device in which the spray behavior of the individual fuel injection valves is checked. If all fuel injection valves meet the specified guide values, this finished device can be attached as a whole to the internal combustion engine or to the intake pipe of the internal combustion engine, depending on the given configurations. For this purpose, the assembled device with the bearing surface 16 of the base body 1 is placed on a bearing surface 50 of the internal combustion engine or the air intake pipe 51 and 32 screws 52 are inserted through the mutually aligned clamping openings 22 and 33 of the holding flanges 21 and the strip holding flanges, with which the device on the Internal combustion engine or screwed to the intake pipe 51 of the internal combustion engine and is thus fastened. Sealing grooves 53, which are open toward the bearing surface 16, serve to receive sealing rings 54 and seal between the bearing surface 16 of the base body 1 and of the contact surface 50 by surrounding the injection openings 55 formed in the intake pipe 51, into each of which an injection nozzle 17 of a fuel injection valve projects. The pressure control valve 9 can also be attached to the device from the outset, in order to mount it on the internal combustion engine when the device is attached. On the other hand, of course, the pressure control valve 9 can also be inserted into and fixed to the device separately after mounting the device on the internal combustion engine.

Die montierte Vorrichtung bedarf nun nur noch der Verbindung mit der Kraftstoffquelle und mit einem elektrischen Stecker, der die von dem elektronischen Steuergerät herkommenden Steuersignale für die ein­zelnen Kraftstoffeinspritzventile über den gemeinsamen Anschluß­stecker 30 zuführt.The assembled device now only needs to be connected to the fuel source and to an electrical plug which supplies the control signals for the individual fuel injection valves coming from the electronic control unit via the common connector plug 30.

Claims (7)

1. Vorichtung zur Halterung, Kraftstoffversorgung und elektrischen Kontaktierung von elektromagnetisch betätigbaren Kraftstoffein­spritzventilen für Kraftstoffeinspritzanlagen von Brennkraftmaschi­nen mit einem aus Kunststoff gefertigten formsteifen Grundkörper, in dem zur Führung der Kraftstoffeinspritzventile abgestufte Aufnahme­bohrungen ausgebildet sind, die jedes Kraftstoffeinspritzventil um­schließend in axialer Richtung offen und mit einer Kraftstoffversor­gungsleitung verbunden sind und mit in Steckern angeordneten ersten elektrisch leitenden Kontaktelementen, die mit zweiten elektrisch leitenden Kontaktelementen der Kraftstoffeinspritzventile in Steck­verbindung bringbar sind, dadurch gekennzeichnet, daß mit dem Grund­körper (1) eine Kontaktierungsleiste (24) verbindbar ist, an der die Stecker (25) gemeinsam angeordnet sind und die dabei die Aufnahme­bohrungen (15) überdeckt und die Kraftstoffeinspritzventile (14) in den Aufnahmebohrungen (15) hält.1.Device for mounting, fuel supply and electrical contacting of electromagnetically actuated fuel injection valves for fuel injection systems of internal combustion engines with a rigid plastic base body, in which stepped receiving bores are formed for guiding the fuel injection valves, each of the fuel injection valves being open in the axial direction and connected to a fuel supply line are and with first electrically conductive contact elements arranged in plugs, which can be brought into a plug connection with second electrically conductive contact elements of the fuel injection valves, characterized in that a contact strip (24) can be connected to the base body (1), on which the plugs (25) together are arranged and which thereby covers the receiving bores (15) and holds the fuel injection valves (14) in the receiving bores (15). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Kon­taktierungsleiste (24) aus Kunststoff ausgebildet und durch eine elastische Rastverbindung (34, 43, 44) mit dem Grundkörper (1) ver­bindbar ist.2. Device according to claim 1, characterized in that the contact strip (24) is made of plastic and can be connected to the base body (1) by means of an elastic latching connection (34, 43, 44). 3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß Grund­körper (1) und Kontaktierungsleiste (24) gemeinsam an der Brenn­kraftmaschine (51) anschraubbar sind.3. Apparatus according to claim 1, characterized in that the base body (1) and contact strip (24) can be screwed together on the internal combustion engine (51). 4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in der Kontaktierungsleiste (24) elektrische Leitungen (29) zur elektri­schen Verbindung der ersten elektrisch leitenden Kontaktelemente (28) angeordnet und mit einem Anschlußstecker (30) verbunden sind.4. The device according to claim 1, characterized in that in the contact strip (24) electrical lines (29) for the electrical connection of the first electrically conductive contact elements (28) are arranged and connected to a connector (30). 5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zwischen Grundkörper (1) und Kontaktierungsleiste (24) wenigstens ein Dicht­ring (46) angeordnet ist.5. The device according to claim 1, characterized in that between the base body (1) and contact strip (24) at least one sealing ring (46) is arranged. 6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß am Grundkörper (1) wenigstens ein Anschlußstutzen (2) für die Kraft­stoffversorgungsleitung (3) und ein Anschlußstutzen (4) für eine Rückströmleitung (5) angeordnet ist.6. The device according to claim 1, characterized in that at least one connection piece (2) for the fuel supply line (3) and a connection piece (4) for a return flow line (5) is arranged on the base body (1). 7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß an dem Grundkörper (1) ein Aufnahmeflansch (7) für ein Druckregelventil (9) vorgesehen ist.7. The device according to claim 6, characterized in that a receiving flange (7) for a pressure control valve (9) is provided on the base body (1).
EP19880113310 1987-09-11 1988-08-17 Device for mounting, supplying fuel to and electrically connecting electromagnetic fuel injectors together Expired - Lifetime EP0306739B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88113310T ATE64440T1 (en) 1987-09-11 1988-08-17 DEVICE FOR HOLDING, FUEL SUPPLY AND ELECTRICAL CONTACTING OF ELECTROMAGNETICALLY ACTIVATED FUEL INJECTION VALVES.

Applications Claiming Priority (2)

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DE3730571A DE3730571C2 (en) 1987-09-11 1987-09-11 Device for mounting, fuel supply and electrical contacting of electromagnetically actuated fuel injection valves
DE3730571 1987-09-11

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EP0306739A2 true EP0306739A2 (en) 1989-03-15
EP0306739A3 EP0306739A3 (en) 1989-11-29
EP0306739B1 EP0306739B1 (en) 1991-06-12

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EP (1) EP0306739B1 (en)
JP (1) JP2765866B2 (en)
KR (1) KR970003156B1 (en)
AT (1) ATE64440T1 (en)
AU (1) AU596913B2 (en)
BR (1) BR8804674A (en)
DE (2) DE3730571C2 (en)

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EP0421358A1 (en) * 1989-10-02 1991-04-10 Yamaha Hatsudoki Kabushiki Kaisha Air fuel injector assembly
US5101792A (en) * 1989-10-20 1992-04-07 Dr. Ing. H.C.F. Porsche, Ag Internal combustion engine fuel distributor housing
EP0423466A1 (en) * 1989-10-20 1991-04-24 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Fuel distributor for an internal combustion engine
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GB2239900B (en) * 1989-12-08 1994-05-25 Usui Kokusai Sangyo Kk Fuel delivery rail assembly
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EP0500219A1 (en) * 1991-02-18 1992-08-26 Sumitomo Wiring Systems, Ltd. A method for producing a metal elements-resin insert; a connector block for injectors, and a method for producing the connector block
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FR2674292A1 (en) * 1991-03-21 1992-09-25 Peugeot Device for supplying and holding several fuel injectors for an internal combustion engine with a built-in system for protecting the cylinders
WO1992016736A1 (en) * 1991-03-23 1992-10-01 Robert Bosch Gmbh Multipoint plugs for common electrical contacting of a plurality of electrically operated fuel injection valves
US5347969A (en) * 1991-03-23 1994-09-20 Robert Bosch Gmbh Contact strip for providing common electrical connection of several electrically operated fuel injection valves
EP0513597A1 (en) * 1991-05-17 1992-11-19 FILTERWERK MANN & HUMMEL GMBH Method of manufacturing a connector block
US5295468A (en) * 1991-05-17 1994-03-22 Filterwerk Mann & Hummel Gmbh Control strip with a compact plastic construction
WO1993017237A1 (en) * 1992-02-25 1993-09-02 Robert Bosch Gmbh Gas distributor for fuel injection systems
WO2011057899A1 (en) * 2009-11-11 2011-05-19 Zf Friedrichshafen Ag Device for fastening and contacting actuators
US8753139B2 (en) 2009-11-11 2014-06-17 Zf Friedrichshafen Ag Device for fastening and contacting actuators
DE102009046618B4 (en) 2009-11-11 2023-09-21 Zf Friedrichshafen Ag Device for fastening and contacting actuators

Also Published As

Publication number Publication date
BR8804674A (en) 1989-04-18
JPH01100365A (en) 1989-04-18
DE3863257D1 (en) 1991-07-18
KR890005384A (en) 1989-05-13
JP2765866B2 (en) 1998-06-18
EP0306739A3 (en) 1989-11-29
DE3730571A1 (en) 1989-03-23
US4844036A (en) 1989-07-04
AU2168888A (en) 1989-03-16
EP0306739B1 (en) 1991-06-12
DE3730571C2 (en) 1998-07-02
KR970003156B1 (en) 1997-03-14
ATE64440T1 (en) 1991-06-15
AU596913B2 (en) 1990-05-17

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