EP0530337B1 - Multipoint plugs for common electrical contacting of a plurality of electrically operated fuel injection valves - Google Patents

Multipoint plugs for common electrical contacting of a plurality of electrically operated fuel injection valves Download PDF

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Publication number
EP0530337B1
EP0530337B1 EP92905557A EP92905557A EP0530337B1 EP 0530337 B1 EP0530337 B1 EP 0530337B1 EP 92905557 A EP92905557 A EP 92905557A EP 92905557 A EP92905557 A EP 92905557A EP 0530337 B1 EP0530337 B1 EP 0530337B1
Authority
EP
European Patent Office
Prior art keywords
multipoint
plug
fuel injection
housing
carrier part
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
EP92905557A
Other languages
German (de)
French (fr)
Other versions
EP0530337A1 (en
Inventor
Karl Gmelin
Thomas Gregorius
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 EP0530337A1 publication Critical patent/EP0530337A1/en
Application granted granted Critical
Publication of EP0530337B1 publication Critical patent/EP0530337B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3005—Details not otherwise provided for
    • 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
    • F02M69/46—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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/21—Engine cover with integrated cabling
    • 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
    • F02M55/025—Common rails

Definitions

  • the invention is based on a contact strip according to the type of the main claim.
  • a contact strip for the common electrical contacting of a plurality of electrically actuable fuel injection valves is already known, which has a contact strip housing with line channels in which the electrical lines contacting the electrically actuable fuel injection valves are arranged.
  • the contact strip housing has a number of plugs corresponding to the number of fuel injectors, which partially surround the fuel injectors at their ends facing away from the spraying ends and have the connector plugs in the direction of the respective valve longitudinal axis and make electrical contact with the connector plugs.
  • This contact strip is only suitable for side-feed and bottom-feed fuel injectors, that is to say for fuel injectors to which the fuel is supplied on its circumference and whose electrical connection takes place at its end facing away from the spray end.
  • EP-A-0 302 608 is a contact strip with a contact strip housing, in which electrical connection lines run and lead to plugs arranged on the contact strip housing. These plugs arranged on the contact strip housing are rigidly connected to one plug of a fuel injector.
  • the result is between e.g. Rigidly mounted on an intake pipe of the internal combustion engine contacting strip and the fuel injection valves to relative movements that can lead to high wear on the contact elements of the plug of the contacting strip and the connector plugs of the fuel injection valves.
  • the contact strip according to the invention with the characterizing features of the main claim has the advantage, in contrast, to ensure simple and safe contacting of a plurality of electrically actuable fuel injectors, which can be of any type.
  • the carrier part which is connected to the contact strip housing and has at least one conductor channel, can be produced in a very simple and inexpensive manner and permits a very compact construction of the contact strip according to the invention.
  • the electrical contact lines protruding from the contact strip can be provided with various electrical plug-in elements, so that the contact strip can be used variably for contacting various fuel injection valves.
  • the separate contacting of the individual fuel injection valves enables the fuel injection valves to move freely to compensate for tolerances during assembly and for temperature-related expansions during operation of the internal combustion engine. Also find Despite the vibration stress during operation of the internal combustion engine, there are almost no relative movements between the fuel injection valves and the respective electrical plug-in elements.
  • the contact strip according to the invention allows the formation of an assembly and service-friendly, from the contact strip and e.g. an existing overall fuel system. Checking a single fuel injector is easy.
  • the attachment of the fuel distributor, for example on an intake pipe of the internal combustion engine, is independent of the attachment of the contact strip, so that the contact strip can also be removed individually.
  • the contact strip itself can be produced in a simple and inexpensive manner.
  • the side faces of the at least one groove-shaped conductor channel of the carrier part are each formed by two adjacent webs formed on the carrier part, so that the groove-shaped conductor channels can be formed particularly easily.
  • the carrier part is connected to the contact strip housing by means of a snap-in connection.
  • the contact strip housing is formed by at least partially plastic encapsulation of the carrier part.
  • the carrier part is part of the contact strip housing.
  • a contact strip designed in this way can be produced particularly easily and inexpensively.
  • the at least one electrical connecting line is held in the respective conductor channel of the carrier part by thermal deformation of the carrier part consisting of plastic.
  • the contacting strip can be connected to a fuel distributor by means of a latching connection and thus in a simple manner.
  • an electrical connector plug serving for the electrical connection of the contact strip is also molded onto the contact strip housing.
  • FIG. 1 and FIG. 2 show a contact strip designed according to the invention in accordance with a first, a second or a third exemplary embodiment
  • FIG. 3 shows a section along the line III-III in FIG. 1 in accordance with the first exemplary embodiment with a fuel injector
  • FIG. 4 shows a section partially shown the line IV-IV in Figure 1 according to the first embodiment
  • Figure 5 is a partially shown section along the line VV in Figure 1 according to the second embodiment
  • Figure 6 is a partially shown section along the Line VI-VI in Figure 1 according to the third embodiment
  • Figure 7 shows a contact strip according to the invention according to a fourth embodiment.
  • the contacting strip for example shown in the drawing according to FIGS. 1, 2 and 7, for the common electrical contacting of a plurality of electrically actuable fuel injection valves, for example for fuel injection systems of mixed-compression spark-ignition internal combustion engines, is designated by 1.
  • the contact strip 1 has a contact strip housing 3 and is connected to it, for example, with a fuel distributor 5 by means of a snap connection 4.
  • the fuel distributor 5 is used to supply fuel to fuel injection valves and has, for example, a central inflow cross section 6 and a number of connecting pieces 7 which is connected to the central inflow cross section 6 and corresponds to the number of cylinders in the internal combustion engine.
  • the connecting pieces 7 each have a longitudinal opening 9, which serves to receive an inlet end 17 of a fuel injector 11 of the top feed type shown for example in FIG.
  • the fuel injection valve 11 has at one end an injection end 13 and at its end remote from the injection end 13 the inlet end 17, which runs concentrically to a longitudinal axis 15 of the valve.
  • the fuel injection valves 11 are arranged with their inlet ends 17, for example, in the longitudinal openings 9 of the connecting pieces 7 of the fuel distributor 5 in such a way that the longitudinal openings 9 closely surround the inlet ends 17 of the fuel injection valves 11 with the interposition of a sealing ring 18 and tightly.
  • the fuel injection valves 11 On their circumference, the fuel injection valves 11 have connecting plugs 19 which are inclined towards the spray end 13 and which are used to make electrical contact with the respective fuel injection valve 11 relative to the respective valve longitudinal axis 15.
  • the contact strip 1 consists of e.g. an approximately U-shaped cross-section of the contact strip housing 3 and, for example, a plate-shaped carrier part 21 made of a plastic and extending in the direction of a longitudinal axis 23.
  • the contact strip housing 3 has a central cover part 25 extending in the direction of the longitudinal axis 23 the cover part 25 on a first leg 27 and a second leg 29 which run at right angles and parallel to one another with respect to the cover part 25 and which, like the cover part 25, extend in the direction of the longitudinal axis 23 of the contact strip 1.
  • the plate-shaped carrier part 21 is arranged in the contact strip housing 3 such that it is partially surrounded by the contact strip housing 3, extends between the legs 27, 29 and extends parallel to the cover part 25.
  • the carrier part 21 it is also possible for the carrier part 21 to have a square, circular or oval cross section rather than a plate-shaped one.
  • the legs 27, 29 of the contacting strip housing 3, facing away from the cover part 25, have a plurality of first housing openings 31, into which locking lugs 33 formed on the circumference of the fuel distributor 5 protrude in the assembled state and thus form the locking connection 4 between the contacting strip 1 and the fuel distributor 5.
  • recesses can also be formed on the circumference of the fuel distributor 5 and the detents 33 on the legs 27, 29 of the contact strip housing 3, so that the recesses and the detents 33 form the detent connection 4.
  • the contact strip 1 and the fuel distributor 5 can be connected to one another, for example by a screw connection, an adhesive connection, a clamp connection or some other connection.
  • the plate-shaped carrier part 21 has, for example, on its upper end face 35 facing away from the fuel distributor 5, facing the cover part 23 of the contact strip housing 3, at least two, in the illustrated exemplary embodiments e.g. seven webs 37 on.
  • the webs 37 run, for example, parallel to the longitudinal axis 23 of the contact strip 1.
  • Groove-shaped conductor channels 39 are formed between each two adjacent webs 37.
  • the groove-shaped conductor channels 39 have a bottom 41 which is formed by the upper end face 35 of the carrier part 21 and side surfaces 43 which are formed by the two adjacent webs 37. In the direction of the cover part 25 of the contact strip housing 3, the groove-shaped conductor channels 39 are open.
  • each of the six groove-shaped conductor channels 39 for example, at least one, in the exemplary embodiments shown exactly one electrical connecting line 45 is arranged.
  • the electrical connection lines 45 can be held in the groove-shaped conductor channels 39 by deformation of the webs 37 of the carrier part 21 consisting of a plastic, as in the first exemplary embodiment according to the invention his.
  • Thermal deformation can e.g. can be achieved by caulking the material of the webs 37 of the carrier part 21 towards one another by means of ultrasonic welding.
  • the connecting lines 45 arranged in conductor channels 39 can be provided with plastic insulation, as shown in the exemplary embodiments. But it can be on plastic insulation can be dispensed with if, for example, the carrier part 21 with its webs 37 is made of an electrically insulating plastic, as in the exemplary embodiments.
  • the connecting lines 45 protrude, for example, with their one ends from one end 47 of the contact strip 1 in the form of an electrical connecting cable 49 (FIG. 1) and are electrically connected to a connecting plug 51. Electrical control signals for the electrically actuable fuel injection valves can be input via the connector 51 from an electronic control device of known type, not shown.
  • the fourth exemplary embodiment according to the invention shown in FIG. 7 shows, to connect the electrical connector 51 used for the electrical connection of the contact strip 1 directly to the contact strip housing 3 of the contact strip 1, e.g. molded in the area of the end 47 of the contact strip 1.
  • the electrical connection lines 45 run in the conductor channels 39 of the carrier part 21 and branch inside the contact strip 1 into electrical contact lines 55 (FIG. 3), which are used for direct electrical contacting of the individual electrically actuable fuel injection valves 11 and protrude through openings 56 from the contact strip housing 3.
  • the branching points at which the electrical connecting lines 45 branch into electrical contact lines 55 are electrically insulated in a manner not shown, for example by casting, gluing or by sealing using an elastomer.
  • the at least two contact lines 55 protrude from the contact strip 1 with their one ends.
  • two contact lines 55 are provided for each fuel injection valve 11 and protrude from the contact strip 1 in the area of the respective connecting piece 7 of the fuel distributor 5.
  • the two contacting lines 55 used to contact a fuel injection valve 11 are, for example, as shown in FIG. 3, electrically connected to an electrical plug element 57.
  • plug elements 57 can in turn be connected to the connecting plugs 19 of the fuel injection valves 11, so that the electrically actuable fuel injection valves can be contacted easily and reliably in this way.
  • the carrier part 21 and the contact strip housing 3 are connected to one another by means of a snap-in connection.
  • the contact strip housing 3 has on its legs 27, 29 between the first housing openings 31 and the cover part 23, second housing openings 61.
  • the carrier part 21 has on its sides facing the legs 27, 29 a plurality of locking lugs 63 running parallel to the longitudinal axis 23, which protrude into the housing openings 61 of the legs 27, 29 of the contact strip housing 1, so that a firm and reliable locking connection between the carrier part 21 and the contact strip housing 3 is formed.
  • the contact strip housing 3 is formed by at least partially plastic encapsulation of the carrier part 21.
  • the carrier part 21 with the connecting lines 45 in the region of its upper end face 35 is surrounded by the plastic encapsulation forming the contact strip housing 3 together with the legs 27, 29.
  • the contact strip 1 according to the invention can be produced particularly simply and inexpensively.
  • a particularly secure and reliable hold of the connecting lines 45 in the groove-shaped conductor channels 39 of the carrier part 21 is ensured.
  • FIG. 6 shows a third exemplary embodiment of a contact strip 1 according to the invention, in which a separate carrier part, as in the previous exemplary embodiments, is missing.
  • webs 37 are formed on the lower end face 40 of the cover part 25 of the contact strip housing 3, facing the fuel distributor 5, between the legs 27, 29, which run parallel to the longitudinal axis 23 of the contact strip 1 and together with the cover part 25 take over the function of the previous support part 21 .
  • Groove-shaped conductor channels 39 are formed between each two adjacent webs 37 and are open in the direction of the fuel distributor 5.
  • An electrical connection line 45 is arranged in the conductor channels 39, for example, which are held in the groove-shaped conductor channels 39, for example, by thermal deformation of the webs 37 of the contact strip housing 3 consisting of a plastic.
  • the previous separate Carrier part 21 is thus integrated in the contact strip housing 3, which has an approximately U-shaped cross section.
  • the contact lines 55 with the plug elements 57 correspond to the exemplary embodiments described so far in this exemplary embodiment.
  • Such a contact strip 1 is particularly simple and inexpensive to manufacture.
  • the contacting strip 1 makes it easy and safe to contact a plurality of electrically actuable fuel injection valves, which can be of any design.
  • the contact strip 1 can be produced in a simple and inexpensive manner.

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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)

Abstract

Multipoint plugs for common electrical contacting of a plurality of electrically operated fuel injection valves, which have plugs that partly surround and contact the ends of the fuel injection valves remote from their injection ends, are already known. These multipoint plugs are suitable only for fuel injection valves in which the fuel is supplied to the periphery of the valve and which are electrically connected at the end remote from the injection end. The new multipoint plug (1) consists of a housing (3) and a supporting part (21) which has conductor channels (39) in which electrically connecting conductors (45) run. The electrical contacting conductors (55) which contact the fuel injection valves (11) project from the multipoint plug (1) and have plug-in elements (57) which contact the fuel injection valves (11). The advantages of this multipoint plug (1) is simple and reliable contacting of a plurality of fuel injection valves of any design. The arrangement of the multipoint plug is particularly suitable for common electrical contacting of electrically operated fuel injection valves of internal combustion engines.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Kontaktierungsleiste nach der Gattung des Hauptanspruchs. Aus der DE 37 25 980 A1 ist bereits eine Kontaktierungsleiste zur gemeinsamen elektrischen Kontaktierung mehrerer elektrisch betätigbarer Brennstoffeinspritzventile bekannt, die ein Kontaktierungsleistengehäuse mit Leitungskanälen aufweist, in denen die die elektrisch betätigbaren Brennstoffeinspritzventile kontaktierenden elektrischen Leitungen angeordnet sind. Das Kontaktierungsleistengehäuse weist eine der Zahl der Brennstoffeinspritzventile entsprechende Anzahl von Steckern auf, die die Brennstoffeinspritzventile an ihren den Abspritzenden abgewandten, die Anschlußstecker aufweisenden Enden in Richtung der jeweiligen Ventillängsachse teilweise umgeben und die Anschlußstecker elektrisch kontaktieren. Diese Kontaktierungsleiste eignet sich nur für Side-Feed- und Bottom-Feed-Brennstoffeinspritzventile, also für Brennstoffeinspritzventile, denen der Brennstoff an ihrem Umfang zugeführt wird und deren elektrischer Anschluß an ihrem dem Abspritzende abgewandten Ende erfolgt.The invention is based on a contact strip according to the type of the main claim. From DE 37 25 980 A1, a contact strip for the common electrical contacting of a plurality of electrically actuable fuel injection valves is already known, which has a contact strip housing with line channels in which the electrical lines contacting the electrically actuable fuel injection valves are arranged. The contact strip housing has a number of plugs corresponding to the number of fuel injectors, which partially surround the fuel injectors at their ends facing away from the spraying ends and have the connector plugs in the direction of the respective valve longitudinal axis and make electrical contact with the connector plugs. This contact strip is only suitable for side-feed and bottom-feed fuel injectors, that is to say for fuel injectors to which the fuel is supplied on its circumference and whose electrical connection takes place at its end facing away from the spray end.

Bekannt ist ebenfalls durch die EP-A-0 302 608 eine Kontaktierungsleiste mit einem Kontaktierungsleistengehäuse, in dem elektrische Anschlußleitungen verlaufen und zu am Kontaktierungsleistengehäuse angeordneten Steckern führen. Diese am Kontaktierungsleistengehäuse angeordneten Stecker sind starr mit je einem Stecker eines Brennstoffeinspritzventiles verbunden.Also known from EP-A-0 302 608 is a contact strip with a contact strip housing, in which electrical connection lines run and lead to plugs arranged on the contact strip housing. These plugs arranged on the contact strip housing are rigidly connected to one plug of a fuel injector.

Werden die Brennstoffeinspritzventile beim Betrieb der Brennkraftmaschine zu Eigenbewegungen oder -schwingungen angeregt, so kommt es zwischen der z.B. starr an einem Ansaugrohr der Brennkraftmaschine montierten Kontaktierungsleiste und den Brennstoffeinspritzventilen zu Relativbewegungen, die zu einem hohen Verschleiß an den Kontaktelementen der Stecker der Kontaktierungsleiste und den Anschlußsteckern der Brennstoffeinspritzventile führen können.If the fuel injection valves are stimulated to move or vibrate during operation of the internal combustion engine, the result is between e.g. Rigidly mounted on an intake pipe of the internal combustion engine contacting strip and the fuel injection valves to relative movements that can lead to high wear on the contact elements of the plug of the contacting strip and the connector plugs of the fuel injection valves.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Kontaktierungsleiste mit den kennzeichnenden Merkmalen des Hauptanspruches hat demgegenüber den Vorteil, eine einfache und sichere Kontaktierung mehrerer elektrisch betätigbarer Brennstoffeinspritzventile zu gewährleisten, die eine beliebige Bauart aufweisen können. Das mit dem Kontaktierungsleistengehäuse verbundene, wenigstens einen Leiterkanal aufweisende Trägerteil ist auf sehr einfache und kostengünstige Art und Weise herstellbar und erlaubt eine sehr kompakte Bauform der erfindungsgemäßen Kontaktierungsleiste.The contact strip according to the invention with the characterizing features of the main claim has the advantage, in contrast, to ensure simple and safe contacting of a plurality of electrically actuable fuel injectors, which can be of any type. The carrier part, which is connected to the contact strip housing and has at least one conductor channel, can be produced in a very simple and inexpensive manner and permits a very compact construction of the contact strip according to the invention.

Die aus der Kontaktierungsleiste herausragenden elektrischen Kontaktierungsleitungen können mit verschiedenen elektrischen Steckelementen versehen werden, so daß die Kontaktierungsleiste variabel zur Kontaktierung verschiedener Brennstoffeinspritzventile verwendbar ist.The electrical contact lines protruding from the contact strip can be provided with various electrical plug-in elements, so that the contact strip can be used variably for contacting various fuel injection valves.

Die separate Kontaktierung der einzelnen Brennstoffeinspritzventile ermöglicht die freie Beweglichkeit der Brennstoffeinspritzventile zum Ausgleich von Toleranzen bei der Montage und von temperaturbedingten Ausdehnungen im Betrieb der Brennkraftmaschine. Zudem finden trotz der Schwingungsbeanspruchung beim Betrieb der Brennkraftmaschine nahezu keine Relativbewegungen zwischen den Brennstoffeinspritzventilen und den jeweiligen elektrischen Steckelementen statt.The separate contacting of the individual fuel injection valves enables the fuel injection valves to move freely to compensate for tolerances during assembly and for temperature-related expansions during operation of the internal combustion engine. Also find Despite the vibration stress during operation of the internal combustion engine, there are almost no relative movements between the fuel injection valves and the respective electrical plug-in elements.

Die erfindungsgemäße Kontaktierungsleiste erlaubt die Bildung eines montage- und servicefreundlichen, aus der Kontaktierungsleiste und z.B. einem Brennstoffverteiler bestehenden Gesamtsystems. Die Überprüfung eines einzelnen Brennstoffeinspritzventils ist problemlos möglich. Die Befestigung des Brennstoffverteilers beispielsweise an einem Ansaugrohr der Brennkraftmaschine ist unabhängig von der Befestigung der Kontaktierungsleiste, so daß die Kontaktierungsleiste auch einzeln demontierbar ist.The contact strip according to the invention allows the formation of an assembly and service-friendly, from the contact strip and e.g. an existing overall fuel system. Checking a single fuel injector is easy. The attachment of the fuel distributor, for example on an intake pipe of the internal combustion engine, is independent of the attachment of the contact strip, so that the contact strip can also be removed individually.

Die Kontaktierungsleiste selbst ist auf einfache und kostengünstige Art und Weise herstellbar.The contact strip itself can be produced in a simple and inexpensive manner.

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

Besonders vorteilhaft ist es, wenn die Seitenflächen des wenigstens einen nutförmigen Leiterkanals des Trägerteils durch jeweils zwei an dem Trägerteil ausgebildete benachbarte Stege gebildet sind, so daß sich die nutförmigen Leiterkanäle besonders einfach ausbilden lassen.It is particularly advantageous if the side faces of the at least one groove-shaped conductor channel of the carrier part are each formed by two adjacent webs formed on the carrier part, so that the groove-shaped conductor channels can be formed particularly easily.

Für eine einfache und zuverlässige Verbindung von Trägerteil und Kontaktierungsleistengehäuse ist es vorteilhaft, wenn das Trägerteil mittels einer Rastverbindung mit dem Kontaktierungsleistengehäuse verbunden ist.For a simple and reliable connection of the carrier part and the contact strip housing, it is advantageous if the carrier part is connected to the contact strip housing by means of a snap-in connection.

Aus dem gleichen Grund ist es ebenfalls vorteilhaft, wenn das Kontaktierungsleistengehäuse durch eine zumindest teilweise Kunststoffumspritzung des Trägerteils ausgebildet ist.For the same reason, it is also advantageous if the contact strip housing is formed by at least partially plastic encapsulation of the carrier part.

Es ist von Vorteil, wenn das Trägerteil Teil des Kontaktierungsleistengehäuses ist. Eine so ausgebildete Kontaktierungsleiste läßt sich besonders einfach und kostengünstig herstellen.It is advantageous if the carrier part is part of the contact strip housing. A contact strip designed in this way can be produced particularly easily and inexpensively.

Um einen sicheren und zuverlässigen Halt der elektrischen Anschlußleitungen in dem jeweiligen Leiterkanal zu gewährleisten, ist es von Vorteil, wenn die zumindest eine elektrische Anschlußleitung durch eine thermische Verformung des aus Kunststoff bestehenden Trägerteils in dem jeweiligen Leiterkanal des Trägerteils gehalten ist.In order to ensure a secure and reliable hold of the electrical connecting lines in the respective conductor channel, it is advantageous if the at least one electrical connecting line is held in the respective conductor channel of the carrier part by thermal deformation of the carrier part consisting of plastic.

Vorteilhaft ist es, wenn die Kontaktierungsleiste mittels einer Rastverbindung und damit auf einfache Art und Weise mit einem Brennstoffverteiler verbindbar ist.It is advantageous if the contacting strip can be connected to a fuel distributor by means of a latching connection and thus in a simple manner.

Für einen einfachen elektrischen Anschluß der Kontaktierungsleiste ist es von Vorteil, wenn an das Kontaktierungsleistengehäuse ein dem elektrischen Anschluß der Kontaktierungsleiste dienender elektrischer Anschlußstecker mitangespritzt ist.For a simple electrical connection of the contact strip, it is advantageous if an electrical connector plug serving for the electrical connection of the contact strip is also molded onto the contact strip housing.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 und Figur 2 eine erfindungsgemäß ausgestaltete Kontaktierungsleiste gemäß eines ersten, eines zweiten oder eines dritten Ausführungsbeispiels, Figur 3 einen Schnitt entlang der Linie III-III in Figur 1 gemäß des ersten Ausführungsbeispiels mit einem Brennstoffeinspritzventil, Figur 4 einen teilweise dargestellten Schnitt entlang der Linie IV-IV in Figur 1 gemäß des ersten Ausführungsbeispiels, Figur 5 einen teilweise dargestellten Schnitt entlang der Linie V-V in Figur 1 gemäß des zweiten Ausführungsbeispiels, Figur 6 einen teilweise dargestellten Schnitt entlang der Linie VI-VI in Figur 1 gemäß des dritten Ausführungsbeispiels und Figur 7 eine erfindungsgemäße Kontaktierungsleiste gemäß eines vierten Ausführungsbeispiels.Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. FIG. 1 and FIG. 2 show a contact strip designed according to the invention in accordance with a first, a second or a third exemplary embodiment, FIG. 3 shows a section along the line III-III in FIG. 1 in accordance with the first exemplary embodiment with a fuel injector, and FIG. 4 shows a section partially shown the line IV-IV in Figure 1 according to the first embodiment, Figure 5 is a partially shown section along the line VV in Figure 1 according to the second embodiment, Figure 6 is a partially shown section along the Line VI-VI in Figure 1 according to the third embodiment and Figure 7 shows a contact strip according to the invention according to a fourth embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Die in der Zeichnung gemäß den Figuren 1, 2 und 7 beispielsweise dargestellte Kontaktierungsleiste zur gemeinsamen elektrischen Kontaktierung mehrerer elektrisch betätigbarer Brennstoffeinspritzventile beispielsweise für Brennstoffeinspritzanlagen von gemischverdichtenden fremdgezündeten Brennkraftmaschinen ist mit 1 bezeichnet. Die Kontaktierungsleiste 1 hat ein Kontaktierungsleistengehäuse 3 und ist mit diesem beispielsweise mit einem Brennstoffverteiler 5 mittels einer Rastverbindung 4 verbunden. Der Brennstoffverteiler 5 dient zur Brennstoffversorgung von Brennstoffeinspritzventilen und weist z.B. einen zentralen Zuströmquerschnitt 6 und eine der Zylinderzahl der Brennkraftmaschine entsprechende mit dem zentralen Zuströmquerschnitt 6 in Verbindung stehende Anzahl von Anschlußstutzen 7 auf. Die Anschlußstutzen 7 haben jeweils eine Längsöffnung 9, die zur Aufnahme eines Zulaufendes 17 eines beispielsweise in der Figur 3 dargestellten Brennstoffeinspritzventils 11 der Top-Feed-Bauart dient. Das Brennstoffeinspritzventil 11 weist an seinem einen Ende ein Abspritzende 13 und an seinem, dem Abspritzende 13 abgewandten Ende das konzentrisch zu einer Ventillängsachse 15 verlaufende Zulaufende 17 auf. Die Brennstoffeinspritzventile 11 sind mit ihren Zulaufenden 17 z.B. so in den Längsöffnungen 9 der Anschlußstutzen 7 des Brennstoffverteilers 5 angeordnet, daß die Längsöffnungen 9 die Zulaufenden 17 der Brennstoffeinspritzventile 11 eng unter Zwischenlage eines Dichtringes 18 und dicht umgeben. An ihrem Umfang weisen die Brennstoffeinspritzventile 11 gegenüber der jeweiligen Ventillängsachse 15 schräg zum Abspritzende 13 hin geneigte Anschlußstecker 19 auf, die zur elektrischen Kontaktierung des jeweiligen Brennstoffeinspritzventils 11 dienen.The contacting strip, for example shown in the drawing according to FIGS. 1, 2 and 7, for the common electrical contacting of a plurality of electrically actuable fuel injection valves, for example for fuel injection systems of mixed-compression spark-ignition internal combustion engines, is designated by 1. The contact strip 1 has a contact strip housing 3 and is connected to it, for example, with a fuel distributor 5 by means of a snap connection 4. The fuel distributor 5 is used to supply fuel to fuel injection valves and has, for example, a central inflow cross section 6 and a number of connecting pieces 7 which is connected to the central inflow cross section 6 and corresponds to the number of cylinders in the internal combustion engine. The connecting pieces 7 each have a longitudinal opening 9, which serves to receive an inlet end 17 of a fuel injector 11 of the top feed type shown for example in FIG. The fuel injection valve 11 has at one end an injection end 13 and at its end remote from the injection end 13 the inlet end 17, which runs concentrically to a longitudinal axis 15 of the valve. The fuel injection valves 11 are arranged with their inlet ends 17, for example, in the longitudinal openings 9 of the connecting pieces 7 of the fuel distributor 5 in such a way that the longitudinal openings 9 closely surround the inlet ends 17 of the fuel injection valves 11 with the interposition of a sealing ring 18 and tightly. On their circumference, the fuel injection valves 11 have connecting plugs 19 which are inclined towards the spray end 13 and which are used to make electrical contact with the respective fuel injection valve 11 relative to the respective valve longitudinal axis 15.

Die Kontakierungsleiste 1 besteht aus dem z.B. einen etwa U-förmigen Querschnitt aufweisenden Kontaktierungsleistengehäuse 3 und einem beispielsweise plattenförmigen, aus einem Kunststoff ausgebildeten Trägerteil 21 und erstreckt sich in Richtung einer Längsachse 23. Das Kontaktierungsleistengehäuse 3 hat ein mittleres, sich in Richtung der Längsachse 23 erstreckendes Deckelteil 25. Seitlich schließen sich an das Deckelteil 25 ein erster Schenkel 27 und ein zweiter Schenkel 29 an, die gegenüber dem Deckelteil 25 rechtwinklig und parallel zueinander verlaufen und die sich wie das Deckelteil 25 in Richtung der Längsachse 23 der Kontaktierungsleiste 1 erstrecken. Das plattenförmige Trägerteil 21 ist in dem Kontaktierungsleistengehäuse 3 derart angeordnet, daß es von dem Kontaktierungsleistengehäuse 3 teilweise umgeben ist, sich zwischen den Schenkeln 27, 29 erstreckt und parallel zu dem Deckelteil 25 verläuft.The contact strip 1 consists of e.g. an approximately U-shaped cross-section of the contact strip housing 3 and, for example, a plate-shaped carrier part 21 made of a plastic and extending in the direction of a longitudinal axis 23. The contact strip housing 3 has a central cover part 25 extending in the direction of the longitudinal axis 23 the cover part 25 on a first leg 27 and a second leg 29 which run at right angles and parallel to one another with respect to the cover part 25 and which, like the cover part 25, extend in the direction of the longitudinal axis 23 of the contact strip 1. The plate-shaped carrier part 21 is arranged in the contact strip housing 3 such that it is partially surrounded by the contact strip housing 3, extends between the legs 27, 29 and extends parallel to the cover part 25.

Es ist aber auch möglich, daß das Trägerteil 21 keinen plattenförmigen, sondern einen quadratischen, kreisrunden oder ovalen Querschnitt aufweist.However, it is also possible for the carrier part 21 to have a square, circular or oval cross section rather than a plate-shaped one.

Die Schenkel 27, 29 des Kontaktierungsleistengehäuses 3 haben dem Deckelteil 25 abgewandt eine Mehrzahl von ersten Gehäusedurchbrüchen 31, in die in montiertem Zustand an dem Umfang des Brennstoffverteilers 5 ausgebildete Rastnasen 33 hineinragen und so die Rastverbindung 4 zwischen Kontaktierungsleiste 1 und Brennstoffverteiler 5 bilden. Es können aber auch Ausnehmungen an dem Umfang des Brennstoffverteilers 5 und die Rastnasen 33 an den Schenkeln 27, 29 des Kontaktierungsleistengehäuses 3 ausgebildet sein, so daß die Ausnehmungen und die Rastnasen 33 die Rastverbindung 4 bilden. Es ist ebenfalls möglich, daß Kontaktierungsleiste 1 und Brennstoffverteiler 5 z.B. durch eine Schraubverbindung, eine Klebeverbindung, eine Klammerverbindung oder eine andere Verbindung miteinander verbunden sind.The legs 27, 29 of the contacting strip housing 3, facing away from the cover part 25, have a plurality of first housing openings 31, into which locking lugs 33 formed on the circumference of the fuel distributor 5 protrude in the assembled state and thus form the locking connection 4 between the contacting strip 1 and the fuel distributor 5. However, recesses can also be formed on the circumference of the fuel distributor 5 and the detents 33 on the legs 27, 29 of the contact strip housing 3, so that the recesses and the detents 33 form the detent connection 4. It is also possible for the contact strip 1 and the fuel distributor 5 to be connected to one another, for example by a screw connection, an adhesive connection, a clamp connection or some other connection.

Das plattenförmige Trägerteil 21 weist beispielsweise an seiner dem Brennstoffverteiler 5 abgewandten oberen Stirnseite 35 dem Deckelteil 23 des Kontaktierungsleistengehäuses 3 zugewandt wenigstens zwei, in den dargestellten Ausführungsbeispielen z.B. sieben Stege 37 auf. Die Stege 37 verlaufen beispielsweise parallel zu der Längsachse 23 der Kontaktierungsleiste 1. Zwischen jeweils zwei benachbarten Stegen 37 sind nutförmige Leiterkanäle 39 ausgebildet. Die nutförmigen Leiterkanäle 39 weisen einen Boden 41, der durch die obere Stirnseite 35 des Trägerteils 21 gebildet ist sowie Seitenflächen 43 auf, die durch die zwei benachbarten Stege 37 gebildet sind. In Richtung zu dem Deckelteil 25 des Kontaktierungsleistengehäuses 3 sind die nutförmigen Leiterkanäle 39 offen. Es ist aber auch möglich, an einer unteren, dem Deckelteil 25 des Kontaktierungsleistengehäuses 3 abgewandten Stirnseite 40 des Trägerteils 21 Stege 37 auszubilden, zwischen denen nutförmige Leiterkanäle 39 gebildet sind.The plate-shaped carrier part 21 has, for example, on its upper end face 35 facing away from the fuel distributor 5, facing the cover part 23 of the contact strip housing 3, at least two, in the illustrated exemplary embodiments e.g. seven webs 37 on. The webs 37 run, for example, parallel to the longitudinal axis 23 of the contact strip 1. Groove-shaped conductor channels 39 are formed between each two adjacent webs 37. The groove-shaped conductor channels 39 have a bottom 41 which is formed by the upper end face 35 of the carrier part 21 and side surfaces 43 which are formed by the two adjacent webs 37. In the direction of the cover part 25 of the contact strip housing 3, the groove-shaped conductor channels 39 are open. However, it is also possible to form webs 37 on a lower end face 40 of the carrier part 21 facing away from the cover part 25 of the contacting strip housing 3, between which groove-shaped conductor channels 39 are formed.

In den beispielsweise sechs nutförmigen Leiterkanälen 39 ist jeweils zumindest eine, bei den dargestellten Ausführungsbeispielen genau eine elektrische Anschlußleitung 45 angeordnet. Um ein Herausgleiter der elektrischen Anschlußleitungen 45 aus den nutförmigen Leiterkanälen 39 des Trägerteils 21 zu verhindern, können, wie bei dem ersten erfindungsgemäßen Ausführungsbeispiel, die elektrischen Anschlußleitungen 45 durch eine Verformung der Stege 37 des aus einem Kunststoff bestehenden Trägerteils 21 in den nutförmigen Leiterkanälen 39 gehalten sein. Eine thermische Verformung kann z.B. durch ein Verstemmen des Materials der Stege 37 des Trägerteils 21 aufeinander zu mittels Ultraschallschweißens erzielt werden.In each of the six groove-shaped conductor channels 39, for example, at least one, in the exemplary embodiments shown exactly one electrical connecting line 45 is arranged. In order to prevent the electrical connection lines 45 from sliding out of the groove-shaped conductor channels 39 of the carrier part 21, the electrical connection lines 45 can be held in the groove-shaped conductor channels 39 by deformation of the webs 37 of the carrier part 21 consisting of a plastic, as in the first exemplary embodiment according to the invention his. Thermal deformation can e.g. can be achieved by caulking the material of the webs 37 of the carrier part 21 towards one another by means of ultrasonic welding.

Die in Leiterkanälen 39 angeordneten Anschlußleitungen 45 können mit einer Kunststoffisolierung versehen sein, wie dies bei den Ausführungsbeispielen dargestellt ist. Es kann aber auf eine Kunststoffisolierung verzichtet werden, wenn z.B. das Trägerteil 21 mit seinen Stegen 37 wie bei den Ausführungsbeispielen aus einem elektrisch isolierenden Kunststoff ausgebildet ist.The connecting lines 45 arranged in conductor channels 39 can be provided with plastic insulation, as shown in the exemplary embodiments. But it can be on plastic insulation can be dispensed with if, for example, the carrier part 21 with its webs 37 is made of an electrically insulating plastic, as in the exemplary embodiments.

Die Anschlußleitungen 45 ragen beispielsweise mit ihren einen Enden aus einem Ende 47 der Kontaktierungsleiste 1 in Form eines elektrischen Anschlußkabels 49 (Figur 1) heraus und sind mit einem Anschlußstecker 51 elektrisch verbunden. Über den Anschlußstecker 51 sind von einem nicht dargestellten elektronischen Steuergerät bekannter Bauart elektrische Ansteuersignale für die elektrisch betätigbaren Brennstoffeinspritzventile eingebbar.The connecting lines 45 protrude, for example, with their one ends from one end 47 of the contact strip 1 in the form of an electrical connecting cable 49 (FIG. 1) and are electrically connected to a connecting plug 51. Electrical control signals for the electrically actuable fuel injection valves can be input via the connector 51 from an electronic control device of known type, not shown.

Es ist aber auch möglich, wie das in der Figur 7 dargestellte erfindungsgemäße vierte Ausführungsbeispiel zeigt, den dem elektrischen Anschluß der Kontaktierungsleiste 1 dienenden elektrischen Anschlußstecker 51 unmittelbar an das Kontaktierungsleistengehäuse 3 der Kontaktierungsleiste 1 z.B. im Bereich des Endes 47 der Kontaktierungsleiste 1 mitanzuspritzen.However, it is also possible, as the fourth exemplary embodiment according to the invention shown in FIG. 7 shows, to connect the electrical connector 51 used for the electrical connection of the contact strip 1 directly to the contact strip housing 3 of the contact strip 1, e.g. molded in the area of the end 47 of the contact strip 1.

Die elektrischen Anschlußleitungen 45 verlaufen in den Leiterkanälen 39 des Trägerteils 21 und verzweigen sich innerhalb der Kontaktierungsleiste 1 in elektrische Kontaktierungsleitungen 55 (Figur 3), die zur direkten elektrischen Kontaktierung der einzelnen elektrisch betätigbaren Brennstoffeinspritzventile 11 dienen und durch Öffnungen 56 aus dem Kontaktierungsleistengehäuse 3 herausragen. Die Verzweigungsstellen, an denen sich die elektrischen Anschlußleitungen 45 in elektrische Kontaktierungsleitungen 55 verzweigen, sind in nicht dargestellter Art und Weise beispielsweise durch Vergießen, Verkleben oder durch Abdichten mittels eines Elastomers elektrisch isoliert.The electrical connection lines 45 run in the conductor channels 39 of the carrier part 21 and branch inside the contact strip 1 into electrical contact lines 55 (FIG. 3), which are used for direct electrical contacting of the individual electrically actuable fuel injection valves 11 and protrude through openings 56 from the contact strip housing 3. The branching points at which the electrical connecting lines 45 branch into electrical contact lines 55 are electrically insulated in a manner not shown, for example by casting, gluing or by sealing using an elastomer.

Die zumindest zwei Kontaktierungsleitungen 55 ragen mit ihren einen Enden aus der Kontaktierungsleiste 1 heraus. Bei den dargestellten Ausführungsbeispielen sind je Brennstoffeinspritzventil 11 zwei Kontaktierungsleitungen 55 vorgesehen die im Bereich der jeweiligen Anschlußstutzen 7 des Brennstoffverteilers 5 aus der Kontaktierungsleiste 1 herausragen. Die beiden zur Kontaktierung eines Brennstoffeinspritzventils 11 dienenden Kontaktierungsleitungen 55 sind beispielsweise, wie in der Figur 3 dargestellt, mit einem elektrischen Steckelement 57 elektrisch verbunden.The at least two contact lines 55 protrude from the contact strip 1 with their one ends. In the exemplary embodiments shown, two contact lines 55 are provided for each fuel injection valve 11 and protrude from the contact strip 1 in the area of the respective connecting piece 7 of the fuel distributor 5. The two contacting lines 55 used to contact a fuel injection valve 11 are, for example, as shown in FIG. 3, electrically connected to an electrical plug element 57.

Diese Steckelemente 57 sind ihrerseits mit den Anschlußsteckern 19 der Brennstoffeinspritzventile 11 verbindbar, so daß die elektrisch betätigbaren Brennstoffeinspritzventile auf diese Art einfach und zuverlässig kontaktiert werden können.These plug elements 57 can in turn be connected to the connecting plugs 19 of the fuel injection valves 11, so that the electrically actuable fuel injection valves can be contacted easily and reliably in this way.

Die Verwendung verschiedener Steckelemente 57 ermöglicht die Kontaktierung verschiedener Brennstoffeinspritzventile 11, so daß die erfindungsgemäße Kontaktierungsleistung 1 variabel verwendbar ist.The use of different plug-in elements 57 makes it possible to contact different fuel injection valves 11, so that the contacting power 1 according to the invention can be used variably.

Bei dem ersten erfindungsgemäßen Ausführungsbeispiel, das in den Figuren 3 und 4 dargestellt ist, sind das Trägerteil 21 und das Kontaktierungsleistengehäuse 3 mittels einer Rastverbindung miteinander verbunden. Zu diesem Zweck weist das Kontaktierungsleistengehäuse 3 an seinen Schenkeln 27, 29 zwischen den ersten Gehäusedurchbrüchen 31 und dem Deckelteil 23 zweite Gehäusedurchbrüche 61 auf. Das Trägerteil 21 hat an seinen den Schenkeln 27, 29 zugewandten Seiten mehrere parallel zu der Längsachse 23 verlaufende Rastnasen 63, die in die Gehäusedurchbrüche 61 der Schenkel 27, 29 des Kontaktierungsleistengehäuses 1 hineinragen, so daß eine feste und zuverlässige Rastverbindung zwischen dem Trägerteil 21 und dem Kontaktierungsleistengehäuse 3 gebildet ist. Anstelle der zweiten Gehäusedurchbrüche 61 der Schenkel 27, 29 können an den Schenkeln 27, 29 Ausnehmungen vorgesehen sein, in die die Rastnasen 63 einrasten. An dem Trägerteil 21 können aber auch Längsbunde oder Nuten ausgeformt sein, die mit den Schenkeln 27, 29 des Kontaktierungsleistengehäuses 3 zusammenwirken.In the first exemplary embodiment according to the invention, which is shown in FIGS. 3 and 4, the carrier part 21 and the contact strip housing 3 are connected to one another by means of a snap-in connection. For this purpose, the contact strip housing 3 has on its legs 27, 29 between the first housing openings 31 and the cover part 23, second housing openings 61. The carrier part 21 has on its sides facing the legs 27, 29 a plurality of locking lugs 63 running parallel to the longitudinal axis 23, which protrude into the housing openings 61 of the legs 27, 29 of the contact strip housing 1, so that a firm and reliable locking connection between the carrier part 21 and the contact strip housing 3 is formed. Instead of the second housing openings 61 of the legs 27, 29, recesses can be made on the legs 27, 29 be provided, in which the latches 63 snap into place. However, longitudinal collars or grooves can also be formed on the carrier part 21, which cooperate with the legs 27, 29 of the contact strip housing 3.

Es ist aber auch möglich, daß wie bei dem zweiten, in der Figur 5 dargestellten Ausführungsbeispiel, das Kontaktierungsleistengehäuse 3 durch eine zumindest teilweise Kunststoffumspritzung des Trägerteils 21 ausgebildet ist. Hierfür ist das Trägerteil 21 mit den Anschlußleitungen 45 im Bereich seiner oberen Stirnseite 35 von der das Kontaktierungsleistengehäuse 3 samt den Schenkeln 27, 29 bildenden Kunststoffumspritzung umgeben. Auf diese Weise läßt sich die erfindungsgemäße Kontaktierungsleiste 1 besonders einfach und kostengünstig herstellen. Zudem wird ein besonders sicherer und zuverlässiger Halt der Anschlußleitungen 45 in den nutförmigen Leiterkanälen 39 des Trägerteils 21 gewährleistet.However, it is also possible, as in the second exemplary embodiment shown in FIG. 5, for the contact strip housing 3 to be formed by at least partially plastic encapsulation of the carrier part 21. For this purpose, the carrier part 21 with the connecting lines 45 in the region of its upper end face 35 is surrounded by the plastic encapsulation forming the contact strip housing 3 together with the legs 27, 29. In this way, the contact strip 1 according to the invention can be produced particularly simply and inexpensively. In addition, a particularly secure and reliable hold of the connecting lines 45 in the groove-shaped conductor channels 39 of the carrier part 21 is ensured.

In der Figur 6 ist ein drittes Ausführungsbeispiel einer erfindungsgemäßen Kontaktierungsleiste 1 dargestellt, bei dem ein separates Trägerteil wie bei den bisherigen Ausführungsbeispielen fehlt. Dafür sind an der dem Brennstoffverteiler 5 zugewandten unteren Stirnseite 40 des Deckelteils 25 des Kontaktierungsleistengehäuses 3 zwischen den Schenkeln 27, 29 Stege 37 ausgebildet, die parallel zu der Längsachse 23 der Kontaktierungsleiste 1 verlaufen und zusammen mit dem Deckelteil 25 die Funktion des bisherigen Trägerteils 21 übernehmen. Zwischen jeweils zwei benachbarten Stegen 37 sind nutförmige Leiterkanäle 39 ausgebildet, die in Richtung des Brennstoffverteilers 5 offen sind. In den Leiterkanälen 39 ist z.B. jeweils eine elektrische Anschlußleitung 45 angeordnet, die beispielsweise durch eine thermische Verformung der Stege 37 des aus einem Kunststoff bestehenden Kontaktierungsleistengehäuses 3 in den nutförmigen Leiterkanälen 39 gehalten sind. Das bisherige separate Trägerteil 21 ist somit in das einen etwa U-förmigen Querschnitt aufweisende Kontaktierungsleistengehäuse 3 integriert. Die Kontaktierungsleitungen 55 mit den Steckelementen 57 entsprechen bei diesem Ausführungsbeispiel den bisher beschriebenen Ausführungsbeispielen. Eine solche Kontaktierungsleiste 1 ist besonders einfach und kostengünstig herstellbar.FIG. 6 shows a third exemplary embodiment of a contact strip 1 according to the invention, in which a separate carrier part, as in the previous exemplary embodiments, is missing. For this purpose, webs 37 are formed on the lower end face 40 of the cover part 25 of the contact strip housing 3, facing the fuel distributor 5, between the legs 27, 29, which run parallel to the longitudinal axis 23 of the contact strip 1 and together with the cover part 25 take over the function of the previous support part 21 . Groove-shaped conductor channels 39 are formed between each two adjacent webs 37 and are open in the direction of the fuel distributor 5. An electrical connection line 45 is arranged in the conductor channels 39, for example, which are held in the groove-shaped conductor channels 39, for example, by thermal deformation of the webs 37 of the contact strip housing 3 consisting of a plastic. The previous separate Carrier part 21 is thus integrated in the contact strip housing 3, which has an approximately U-shaped cross section. The contact lines 55 with the plug elements 57 correspond to the exemplary embodiments described so far in this exemplary embodiment. Such a contact strip 1 is particularly simple and inexpensive to manufacture.

Die erfindungsgemäße Kontaktierungsleiste 1 ermöglicht es, mehrere elektrisch betätigbare Brennstoffeinspritzventile, die eine beliebige Bauart aufweisen können, einfach und sicher zu kontaktieren. Die Kontaktierungsleiste 1 ist auf einfache und kostengünstige Art und Weise herstellbar.The contacting strip 1 according to the invention makes it easy and safe to contact a plurality of electrically actuable fuel injection valves, which can be of any design. The contact strip 1 can be produced in a simple and inexpensive manner.

Claims (10)

  1. Multipoint plug for making common electrical contact between a plurality of electromagnetically operated fuel injection valves, having a multipoint plug housing and at least two electrical connection lines which are arranged in at least one conductor channel, the multipoint plug (1) having at least one carrier part (21) which is connected to the housing (3) of the multipoint plug and has the at least one conductor channel (39), characterized in that at least two electrical contacting lines (55) which serve to make contact with the electrically operated fuel injection valves (11) project out of the housing (3) of the multipoint plug and are connected to a plug-in element (57) which is separated from the housing (3) of the multipoint plug.
  2. Multipoint plug according to Claim 1, characterized in that the at least one groove-shaped conductor channel (39) of the carrier part (21) has side faces (43) which are formed by in each case two adjacent webs (37) which are constructed on the carrier part (21).
  3. Multipoint plug according to Claim 1 or 2, characterized in that the carrier part (21) is arranged in the housing (3) of the multipoint plug and is connected thereto by means of a locking connection (4).
  4. Multipoint plug according to Claim 1 or 2, characterized in that the housing (3) of the multipoint plug is formed by an at least partial injection-moulded encapsulation of the carrier part (21).
  5. Multipoint plug according to Claim 1 or 2, characterized in that the carrier part (21) is part of the housing (3) of the multipoint plug.
  6. Multipoint plug according to one of the preceding claims, characterized in that the carrier part (21) is constructed from a plastic.
  7. Multipoint plug according to Claim 2, characterized in that the at least one electrical connecting line (45) is held in the respective conductor channel (39) of the carrier part (21) by means of a deformation of the carrier part (21).
  8. Multipoint plug according to Claim 1, characterized in that the multipoint plug (1) can be connected to a fuel distributor (5) by means of a locking connection.
  9. Multipoint plug according to Claim 1, characterized in that an electrical connection plug (51) which serves to make electrical contact with the multipoint plug (1) is also injection moulded onto the housing (3) of the multipoint plug.
  10. Multipoint plug according to Claim 1, characterized in that at least two electrical connection lines (45) which serve to make electrical contact with the multipoint plug (1) and are connected to an electrical connection plug (51) project out of the multipoint plug (1).
EP92905557A 1991-03-23 1992-02-20 Multipoint plugs for common electrical contacting of a plurality of electrically operated fuel injection valves Expired - Lifetime EP0530337B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4109653A DE4109653A1 (en) 1991-03-23 1991-03-23 CONTACTING BAR FOR THE COMMON ELECTRICAL CONTACTING OF SEVERAL ELECTRICALLY ACTUABLE FUEL INJECTION VALVES
DE4109653 1991-03-23
PCT/DE1992/000120 WO1992016736A1 (en) 1991-03-23 1992-02-20 Multipoint plugs for common electrical contacting of a plurality of electrically operated fuel injection valves

Publications (2)

Publication Number Publication Date
EP0530337A1 EP0530337A1 (en) 1993-03-10
EP0530337B1 true EP0530337B1 (en) 1995-09-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92905557A Expired - Lifetime EP0530337B1 (en) 1991-03-23 1992-02-20 Multipoint plugs for common electrical contacting of a plurality of electrically operated fuel injection valves

Country Status (6)

Country Link
US (1) US5347969A (en)
EP (1) EP0530337B1 (en)
JP (1) JPH05507782A (en)
KR (1) KR100244358B1 (en)
DE (2) DE4109653A1 (en)
WO (1) WO1992016736A1 (en)

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US6012418A (en) * 1996-11-18 2000-01-11 Robert Bosch Gmbh Distributor device for fuel injection systems

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JP2853541B2 (en) * 1993-11-17 1999-02-03 住友電装株式会社 Method for resin insert molding of metal member and connector block for injector of internal combustion engine
US5568798A (en) * 1995-06-08 1996-10-29 Siemens Automotive Corporation Plastic fuel rail having integrated electrical wiring
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US5347969A (en) 1994-09-20
JPH05507782A (en) 1993-11-04
DE59203663D1 (en) 1995-10-19
WO1992016736A1 (en) 1992-10-01
KR100244358B1 (en) 2000-03-02
EP0530337A1 (en) 1993-03-10
DE4109653A1 (en) 1992-09-24

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