EP1373708A1 - Connection by means of a retaining clip of two elements of a fuel supply system of an internal combustion engine that are coaxially disposed one behind the other - Google Patents

Connection by means of a retaining clip of two elements of a fuel supply system of an internal combustion engine that are coaxially disposed one behind the other

Info

Publication number
EP1373708A1
EP1373708A1 EP02729786A EP02729786A EP1373708A1 EP 1373708 A1 EP1373708 A1 EP 1373708A1 EP 02729786 A EP02729786 A EP 02729786A EP 02729786 A EP02729786 A EP 02729786A EP 1373708 A1 EP1373708 A1 EP 1373708A1
Authority
EP
European Patent Office
Prior art keywords
connection
clip
holding
retaining
legs
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
EP02729786A
Other languages
German (de)
French (fr)
Other versions
EP1373708B1 (en
Inventor
Jochen Schoeffler
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 EP1373708A1 publication Critical patent/EP1373708A1/en
Application granted granted Critical
Publication of EP1373708B1 publication Critical patent/EP1373708B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws

Definitions

  • the invention is based on a connection of two elements of a fuel supply system of an internal combustion engine, arranged coaxially one behind the other, according to the preamble of claims 1 and
  • connection which serves to fix a pressure control valve in a receptacle running transversely to a fuel rail of a motor vehicle, which has one with an inlet opening of the fuel rail in
  • a bottom part of the pressure control valve is inserted into the through-bore of the receiving bushing, which has two slots opposite one another in a wall and aligned with a retaining groove in the pressure control valve, which protrudes through a U-shaped retaining clip with legs designed as a spring element, thereby causing one Pressure control valve in the receiving bushing holding force can be generated.
  • the housing of the pressure control valve and the socket are made of stainless steel.
  • fuse clamps for fastening injection valves to plug connections of a fuel rail are known from the prior art, the injection valve and the plug connection having sections of stainless steel, at least in the area of the fuse clamp.
  • the retaining clips and securing clips of the prior art are stamped and bent parts made of spring steel, in particular of CK67, which are subsequently provided with corrosion protection, for example by galvanizing and yellow chromating.
  • corrosion protection layer is often damaged, so that there is contact corrosion between the stainless steel of the interconnected elements and the partially unprotected and base spring steel of the retaining clips and securing clips, as a result of this and due to electrochemical reactions comes, which in the worst case leads to breakage and total failure of these components.
  • connection according to the invention with the characterizing features of claim 1 or claim 6 accordingly has the advantage that, due to the use of stainless steel for the retaining clip and the securing clip, similar materials are present in relation to the elements connected by these components. As a result, electrochemical reactions between holding clip or securing clip on the one hand and the elements of the fuel supply system connected by them largely excluded. In particular, additional corrosion protection measures such as painting, yellow chromating or galvanizing can be dispensed with.
  • the first element of the connection according to the invention is, for example, a receptacle connected to a fuel rail, into which a pressure control valve is inserted as the second element.
  • the legs of the retaining clip form, at least in sections, complementary circular arcs which are formed to form a cylindrical holding groove of the pressure control valve and enclose an imaginary circular surface. Before being inserted into the holding openings, the legs are bent towards one another in such a way that the circular area enclosed by the circular arcs has a smaller radius than the holding groove. Then the retaining clip is seated in the retaining groove with radial preload and thus shake-proof. In order to reduce any material stresses caused by this, the retaining clip can be used after
  • FIG. 1 shows a cross-sectional view through a connection of a pressure control valve with a fuel rail
  • FIG. 3 shows a side view of the securing clip
  • 4 shows an end view of the securing clamp from FIG. 3;
  • FIG. 5 shows a top view of the securing clip of FIG. 3.
  • 1 denotes a fuel distributor line of a fuel injection system for internal combustion engines, which has a plurality of plug connections 2, into which fuel injection valves are inserted at one end.
  • a pot-shaped receptacle 3 is connected to the wall of the fuel rail 1, for example soldered or welded.
  • the receiving bushing 3 can also be integrally formed on the fuel rail 1 and / or at least partially protrude into the fuel rail 1.
  • At least one inlet opening 5 is provided in the wall 4 of the fuel rail 1 facing the receptacle 3, which is aligned with a connecting opening 6 in the bottom 7 of the receptacle 3. The inlet opening 5 and the
  • Connection opening 6 can also have an annular shape.
  • a pressure control valve 8 is inserted, which projects with a valve seat carrier body 9 through a first push-through opening 10 in the receptacle 3 and a second push-through opening 1 1 in the wall 4 of the fuel rail 1 in an outlet port 12.
  • the outlet connector 12 projects into the fuel rail 1 and penetrates the pressure control valve 8 facing away wall 13 of the fuel rail 1 in an opening 14 in which it is tightly attached, for example soldered.
  • the inlet openings 5 and the connection opening 6 can also be made so large that the valve seat support body 9 can be passed through the inlet opening 5 and the connection opening 6 while maintaining a sufficiently large cross section around its circumference.
  • the valve seat support body 9 projects with its end protruding from the pressure control valve 8 into a receiving bore 15 of the outlet connector 12 and is provided on its circumference with an elastic sealing ring 16 for sealing against the receiving bore 15.
  • the outlet port 12 penetrates in the axial direction an outlet channel 17 which also penetrates the valve seat support body 9 in a manner not shown and leads to a fuel tank or the suction side of a fuel feed pump.
  • the fuel rail 1 is connected to a fuel supply line, not shown for scale reasons, which is connected to the delivery outlet of the fuel pump.
  • the inlet opening 5 and the connection opening 6 form part of an inlet channel for the fuel into the pressure control valve 8.
  • the way in which such a pressure control valve works is known, for example, from DE 36 07 81 1 A1, so it will not be discussed further here.
  • the valve housing of the pressure regulating valve 8 has a bottom part 19 which is inserted into the receiving bush 3 and has the valve seat support body 9, which is either connected as an independent part to the bottom part 19 or is part of the bottom part.
  • the bottom part 19 has a radially open sealing groove on its circumference, in which a sealing ring 27 sealing in the radial direction is arranged.
  • the up Receiving bush 3 surrounds the bottom part 19 of the pressure control valve 8 in the axial direction from the bottom 7 continuously in an area at least so far that a secure seal between the bottom part 19 and the receiving bush 3 is ensured by the sealing ring 27.
  • the receptacle 3 has at its end facing away from the fuel rail 1 a radially outwardly extending flange 28 which extends approximately parallel to the fuel rail 1.
  • a radially outwardly extending flange 28 which extends approximately parallel to the fuel rail 1.
  • two slits 31 lying opposite one another and extending in the circumferential direction are formed.
  • a holding clip 32 is used.
  • the slots 31 in the wall 30 of the receptacle 3 represent holding openings for the U-shaped holding clip 32.
  • the holding clip consists of spring wire made of stainless steel according to DIN 17224, which has a chromium content of at least 12% and in particular also a nickel content of at least 6 % having.
  • 32 spring wire made of X12 Cr Ni 17 7 (material number 1.4310) is used for the retaining clip.
  • the holding clamp 32 has two legs 34 connected by a cross member 33, which in the region of one adjoining the cross member
  • subsequent initial section 35 run parallel to one another and in a central section 36 complementary to a cylindrical holding groove 37 of the pressure regulating valve 8, form circular arcs 38 enclosing an imaginary circular surface, which open into an end section 39 in which the legs 34 widen in a funnel shape ,
  • the retaining clip 32 is biased radially against the retaining groove 37 in the inserted state, which is achieved, for example, in that the legs are bent toward one another in this way before assembly be that the circular area enclosed by them has a smaller radius than the holding groove 37.
  • the holding clamp 32 is preferably subsequently tempered, which is often not necessary due to the low degree of deformation.
  • the holding clip 32 is preferably a flat component, ie its legs 34 lie in one plane.
  • the circular arcs 38 of the central section 36 can be formed with corrugations which extend in a plane perpendicular to a plane containing the holding groove 37.
  • These corrugations can each be formed by an essentially single-period sinusoidal curve, the corrugation of one leg 34 being 180 degrees out of phase with the corrugation of the other leg 34, for example.
  • the two slots 31 of the receptacle 3 are in alignment with the retaining groove 37 formed on the circumference of the pressure regulating valve 8.
  • the clear height of the slots 31 is slightly larger than the diameter of the retaining clip wire, so that the retaining clip 32 can be inserted tangentially into this, as best illustrated in FIG. 2.
  • Slots 31 of the receptacle 3 can therefore engage its legs 34 in the holding groove 37 and run along it in the circumferential direction.
  • the legs 34 first spread out, which is facilitated by the funnel-shaped widened end section 39 until they engage with the circular arcs 38 of the central section 36 on the holding groove 37 and embrace the pressure control valve 8 in a form-fitting manner on both sides.
  • the slots 31 present in the wall 30 of the receiving bush 3 extend so deeply into them in the radial direction that that two remaining sheets 40 remain with a width which corresponds essentially to the length of the cross member 33 or the distance between the two legs 34 of the retaining clip 32 in its end portion 39.
  • the retaining clip 32 is so long that both its initial section 35 with the crossmember 33 and its tricher-shaped extended end section 39 each protrude at least partially from the slots 31 in the assembly position, so that the legs 34 in the area of the slots 31 essentially exist Cross opposite and opposite end faces 41, 42 of the wall 30 of the receiving bushing 3 which run parallel to the plane of the holding clip 32.
  • a securing terminal 43 for fastening an injection valve to the plug connection 2 is the
  • the securing clamp 43 has an L-shaped head plate 44 with two mutually perpendicular legs 45, 46, from one leg 45 of which two symmetrical wings 47 protrude vertically. As best illustrated in FIGS. 4 and 5, the wings 47 have parallel to the other leg 46 of the head plate
  • the securing clamp 43 consists of spring band made of stainless steel according to DIN 17224, which has a chromium content of at least 12% and in particular also a nickel content of at least 6%.
  • spring clip made of X12 Cr Ni 17 7 (material number 1.4310) is used for the securing terminal.

Abstract

The invention relates to the connection of two elements of a fuel supply system of an internal combustion engine that are coaxially disposed one behind the other. The inventive connection is characterized in that the first element is preferably a receiving sleeve (3) of a fuel distributor line (1) with a guide opening and the second element is configured as a pressure balance valve (8) or pressure damper and can be inserted with a guide section (19) in the guide opening (18) of the receiving sleeve (3). Said receiving sleeve comprises two opposite retaining openings (31), disposed opposite in a wall (30) and aligned with respect to each other and to a retaining groove (37) in the pressure balance valve (8). The receiving sleeve extends with its legs (34) through a U-shaped retaining clip (32), thereby fixing the position of the receiving sleeve (3) relative to the pressure balance valve (8) which are provided with sections from stainless steel at least in the area of the retaining clip (32). Alternatively, the first element can be an injection valve that is inserted with its one end in a plug-in connection (2) of the fuel distributor line (1) configuring the second element and that is fixed therein by means of a securing clip. The injection valve and the plug-in connection (2), at least in the area of the retaining clip, have sections from stainless steel. According to the invention, the retaining clip (32) is formed by a spring wire and the securing clip formed by a stainless spring band steel in order to avoid contact corrosion.

Description

VERBINDUNG ZWEIER KOAXIAL HINTEREINANDER ANGEORDNETER ELEMENTE EINER KRAFTSTOFFVERSORGUNGSANLAGE EINER BRENNKRAFTMASCHINE DURCH EINE HALTEKLAMMER CONNECTION OF TWO COAXIAL ELEMENTS OF A FUEL SUPPLY SYSTEM OF AN INTERNAL COMBUSTION ENGINE THROUGH A BRACKET
Beschreibungdescription
Stand der TechnikState of the art
Die Erfindung geht aus von einer Verbindung zweier koaxial hintereinander angeordneter Elemente einer Kraftstoffversorgungsan- läge einer Brennkraftmaschine nach der Gattung der Ansprüche 1 undThe invention is based on a connection of two elements of a fuel supply system of an internal combustion engine, arranged coaxially one behind the other, according to the preamble of claims 1 and
7.7th
Aus der DE 36 07 81 A1 ist eine Verbindung bekannt, welche zur Fixierung eines Druckregelventils in einer quer zu einer Kraftstoffverteilerleitung eines Kraftfahrzeugs verlaufenden Aufnahmebuchse dient, die eine mit einer Einlaßöffnung der Kraftstoffverteilerleitung inFrom DE 36 07 81 A1 a connection is known which serves to fix a pressure control valve in a receptacle running transversely to a fuel rail of a motor vehicle, which has one with an inlet opening of the fuel rail in
Verbindung stehende Durchgangsbohrung aufweist. Dazu ist ein Bodenteil des Druckregelventils in die Durchgangsbohruπg der Aufnahmebuchse eingesetzt, die einander gegenüberliegend in einer Wandung zwei zueinander und zu einer Haltenut im Druckregelventil fluchtende Schlitze hat, die eine als Federelement ausgebildete, U- förmige Halteklammer mit Schenkeln durchragt, wodurch eine das Druckregelventil in der Aufnahmebuchse haltende Vorspannkraft erzeugbar ist. Das Gehäuse des Druckregelventils und die Aufnahmebuchse bestehen aus nicht-rostendem Stahl.Has connected through hole. For this purpose, a bottom part of the pressure control valve is inserted into the through-bore of the receiving bushing, which has two slots opposite one another in a wall and aligned with a retaining groove in the pressure control valve, which protrudes through a U-shaped retaining clip with legs designed as a spring element, thereby causing one Pressure control valve in the receiving bushing holding force can be generated. The housing of the pressure control valve and the socket are made of stainless steel.
Darüber hinaus sind aus dem Stand der Technik Sicherungs- klemmen zur Befestigung von Einspritzventilen an Steckanschlüssen einer Kraftstoffverteilerleitung bekannt, wobei das Einspritzventil und der Steckanschluß zumindest im Bereich der Sicherungsklemme Abschnitte aus nicht-rostendem Stahl aufweisen.In addition, fuse clamps for fastening injection valves to plug connections of a fuel rail are known from the prior art, the injection valve and the plug connection having sections of stainless steel, at least in the area of the fuse clamp.
Bei den Halteklammern und Sicherungsklemmen des Stands der Technik handelt es sich um Stanz-Biegeteile aus Federstahl, insbesondere aus CK67, die anschließend mit einem Korrosionsschutz beispielsweise durch Verzinken und Gelbchromatieren versehen werden. Bei der Montage der Halte- und Sicherungsklammern wird jedoch die Korrosionsschutzschicht oft beschädigt, so daß es dadurch sowie auf- grund elektro-chemischer Reaktionen zu Kontaktkorrosion zwischen dem nicht-rostenden Stahl der miteinander verbundenen Elemente und dem stellenweise ungeschützten und unedleren Federstahl der Halteklammern und Sicherungsklemmen kommt, was im schlimmsten Fall zum Bruch und Totalausfall dieser Bauteile führt.The retaining clips and securing clips of the prior art are stamped and bent parts made of spring steel, in particular of CK67, which are subsequently provided with corrosion protection, for example by galvanizing and yellow chromating. When mounting the retaining and securing clips, however, the corrosion protection layer is often damaged, so that there is contact corrosion between the stainless steel of the interconnected elements and the partially unprotected and base spring steel of the retaining clips and securing clips, as a result of this and due to electrochemical reactions comes, which in the worst case leads to breakage and total failure of these components.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Verbindung mit den kennzeichenden Merkmalen des Anspruchs 1 oder des Anspruchs 6 hat demg egenüber den Vorteil, daß bedingt durch die Verwendung von nicht-rostendem Stahl für die Halteklammer und die Sicherungsklemme in Bezug auf die durch diese Bauteile miteinander verbundenen Elemente gleichartige Werkstoffe vorliegen. Infolgedessen sind elektrochemische Reaktionen zwischen Halteklammer oder Sicherungsklemme einerseits und den durch sie miteinander verbundenen Elementen der Kraftstoffversorgungsanlage weitgehend ausgeschlossen. Insbesondere kann auf zusätzliche Korrosionsschutzmaßnahmen wie Lackieren, Gelbchromatie- ren oder Verzinken verzichtet werden.The connection according to the invention with the characterizing features of claim 1 or claim 6 accordingly has the advantage that, due to the use of stainless steel for the retaining clip and the securing clip, similar materials are present in relation to the elements connected by these components. As a result, electrochemical reactions between holding clip or securing clip on the one hand and the elements of the fuel supply system connected by them largely excluded. In particular, additional corrosion protection measures such as painting, yellow chromating or galvanizing can be dispensed with.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der in den Ansprüchen 1 und 7 angegebenen Verbindungen möglich.Advantageous further developments and improvements of the connections specified in claims 1 and 7 are possible through the measures listed in the subclaims.
Als erstes Element der erfindungsgemäßen Verbindung dient beispielsweise eine mit einer Kraftstoffverteilerleitung verbundene Aufnahmebuchse, in die als zweites Element ein Druckregelventil eingesetzt ist. Die Schenkel der Halteklammer bilden wenigstens abschnittsweise komplementär zu einer zylindrischen Haltenut des Druckregelventils geformte, eine imaginäre Kreisfläche umschließende Kreisbögen. Die Schenkel werden vor dem Einsetzen in die Halteöffnungen derart zueinander gebogen, daß die von den Kreisbögen eingeschlossene Kreisfläche einen kleineren Radius als die Haltenut hat. Dann sitzt die Halteklammer mit radialer Vorspannung und damit schüttelfest in der Haltenut. Um hierdurch eventuell hervorgerufene Materialspannungen abzubauen, kann die Halteklammer nach demThe first element of the connection according to the invention is, for example, a receptacle connected to a fuel rail, into which a pressure control valve is inserted as the second element. The legs of the retaining clip form, at least in sections, complementary circular arcs which are formed to form a cylindrical holding groove of the pressure control valve and enclose an imaginary circular surface. Before being inserted into the holding openings, the legs are bent towards one another in such a way that the circular area enclosed by the circular arcs has a smaller radius than the holding groove. Then the retaining clip is seated in the retaining groove with radial preload and thus shake-proof. In order to reduce any material stresses caused by this, the retaining clip can be used after
Vorbiegen und vor dem Einsetzen in die Halteöffnungen angelassen werden.Pre-bend and start before inserting into the holding holes.
Zeichnungendrawings
Ausführungsbeispiele der Erfindung ist in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert. In den Zeichnungen zeigt Fig.1 eine Querschnittsdarstellung durch eine Verbindung eines Druckregelventils mit einer Kraftstoffverteilerleitung;Embodiments of the invention are shown in the drawings and explained in more detail in the following description. In the drawings shows 1 shows a cross-sectional view through a connection of a pressure control valve with a fuel rail;
Fig.2 einen Schnitt entlang der Linie ll-ll von Fig.1 ;2 shows a section along the line II-II of Figure 1;
Fig.3 eine Seitenansicht der Sicherungsklemme; Fig.4 eine Stirnansicht der Sicherungsklemme von Fig.3;3 shows a side view of the securing clip; 4 shows an end view of the securing clamp from FIG. 3;
Fig.5 eine Draufsicht auf die Sicherungsklemme von Fig.3.5 shows a top view of the securing clip of FIG. 3.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Bei dem Ausführungsbeispiel nach Fig.1 und Fig.2 ist mit 1 eine Kraftstoffverteilerleitung einer Kraftstoffeinspritzanlage für Brennkraftmaschinen bezeichnet, die mehrere Steckanschlüsse 2 aufweist, in die Kraftstoffeinspritzventile mit ihrem einen Ende eingesetzt sind. Mit der Wandung der Kraftstoffverteilerleitung 1 ist eine topfförmig ausgebildete Aufnahmebuchse 3 verbunden, beispielsweise verlötet oder ver- schweißt. Die Aufnahmebuchse 3 kann auch an der Kraftstoffverteilerleitung 1 angeformt sein und/oder zumindest teilweise in die Kraftstoffverteilerleitung 1 hineinragen. In der der Aufnahmebuchse 3 zugewandten Wandung 4 der Kraftstoffverteilerleitung 1 ist mindestens eine Einlaßöffnung 5 vorgesehen, die mit einer Verbindungsöffnung 6 im Boden 7 der Aufnahmebuchse 3 fluchtet. Die Einlaßöffnung 5 und dieIn the exemplary embodiment according to FIGS. 1 and 2, 1 denotes a fuel distributor line of a fuel injection system for internal combustion engines, which has a plurality of plug connections 2, into which fuel injection valves are inserted at one end. A pot-shaped receptacle 3 is connected to the wall of the fuel rail 1, for example soldered or welded. The receiving bushing 3 can also be integrally formed on the fuel rail 1 and / or at least partially protrude into the fuel rail 1. At least one inlet opening 5 is provided in the wall 4 of the fuel rail 1 facing the receptacle 3, which is aligned with a connecting opening 6 in the bottom 7 of the receptacle 3. The inlet opening 5 and the
Verbindungsöffnung 6 können auch eine ringförmige Gestalt haben. In eine Führungsbohrung 18 der Aufnahmebuchse 3 ist ein Druckregelventil 8 eingesetzt, das mit einem Ventilsitzträgerkörper 9 d urch eine erste Durchstecköffnung 10 in der Aufnahmebuchse 3 und ei ne zweite Durchstecköffnung 1 1 in der Wandung 4 der Kraftstoffverteilerleitung 1 dichtend in einen Auslaßstutzen 12 ragt. Der Auslaßstutzen 12 ragt in die Kraftstoffverteilerleitung 1 und durchdringt die dem Druckregelventil 8 abgewandte Wandung 13 der Kraftstoffverteilerleitung 1 in einer Öffnung 14, in der er dicht befestigt ist, beispielsweise verlötet. Anstelle durch die gesonderten Durchstecköffnungen 10, 1 1 können auch die Einlaßöffnungen 5 und die Verbindungsöffnung 6 so groß ausgebildet sein, daß der Ventilsitzträgerkörper 9 unter Beibehaltung eines ausreichend großen Querschnitts um seinen Umfang durch die Einlaßöffnung 5 und die Verbindungsöffnung 6 hindurchgeführt werden kann. Der Ventilsitzträgerkörper 9 ragt mit seinem aus dem Druckregelventil 8 herausragenden Ende in eine Aufnahmebohrung 15 des Auslaßstut- zens 12 und ist an seinem Umfang mit einem elastischen Dichtring 16 zur Abdichtung gegenüber der Aufnahmebohrung 15 versehen. Den Auslaßstutzen 12 durchdringt in axialer Richtung ein Auslaßkanal 17, der in nicht dargestellter Weise ebenfalls den Ventilsitzträgerkörper 9 durchdringt und zu einem Kraftstoffbehälter oder der Saugseite einer Kraftstofförderpumpe führt. Die Kraftstoffverteilerleitung 1 ist mit einer aus Maßstabsgründen nicht dargestellten Kraftstoffversorgungsleitung verbunden, die an den Förderausgang der Kraftstoffpumpe angeschlossen ist. Die Einlaßöffnung 5 und die Verbindungsöffnung 6 bilden einen Teil eines Einlaßkanals für den Kraftstoff in das Druckregel- ventil 8. Die Funktionsweise eines solchen Druckregelventils ist beispielsweise aus der DE 36 07 81 1 A1 bekannt, deshalb soll hierauf nicht weiter eingegangen werden.Connection opening 6 can also have an annular shape. In a guide bore 18 of the receptacle 3, a pressure control valve 8 is inserted, which projects with a valve seat carrier body 9 through a first push-through opening 10 in the receptacle 3 and a second push-through opening 1 1 in the wall 4 of the fuel rail 1 in an outlet port 12. The outlet connector 12 projects into the fuel rail 1 and penetrates the pressure control valve 8 facing away wall 13 of the fuel rail 1 in an opening 14 in which it is tightly attached, for example soldered. Instead of through the separate push-through openings 10, 1 1, the inlet openings 5 and the connection opening 6 can also be made so large that the valve seat support body 9 can be passed through the inlet opening 5 and the connection opening 6 while maintaining a sufficiently large cross section around its circumference. The valve seat support body 9 projects with its end protruding from the pressure control valve 8 into a receiving bore 15 of the outlet connector 12 and is provided on its circumference with an elastic sealing ring 16 for sealing against the receiving bore 15. The outlet port 12 penetrates in the axial direction an outlet channel 17 which also penetrates the valve seat support body 9 in a manner not shown and leads to a fuel tank or the suction side of a fuel feed pump. The fuel rail 1 is connected to a fuel supply line, not shown for scale reasons, which is connected to the delivery outlet of the fuel pump. The inlet opening 5 and the connection opening 6 form part of an inlet channel for the fuel into the pressure control valve 8. The way in which such a pressure control valve works is known, for example, from DE 36 07 81 1 A1, so it will not be discussed further here.
Das Ventilgehäuse des Druckregelventils 8 hat ein Bodenteil 19, das in die Aufnahmebuchse 3 eingesteckt ist und den Ventilsitzträger- körper 9 aufweist, der entweder als selbständiges Teil mit dem Bodenteil 19 verbunden ist oder Teil des Bodenteils ist. Das Bodenteil 19 weist an seinem Umfang eine radial offene Dichtnut auf, in der ein in radialer Richtung abdichtender Dichtring 27 angeordnet ist. Die Auf- nahmebuchse 3 umschließt das Bodenteil 19 des Druckregelventils 8 in axialer Richtung vom Boden 7 fortführend in einem Bereich mindestens so weit vollständig, daß eine sichere Abdichtung zwischen dem Bodenteil 19 und der Aufnahmebuchse 3 durch den Dichtring 27 ge- währleistet ist. Die Aufnahmebuchse 3 weist an ihrem der Kraftstoffverteilerleitung 1 abgewandten Ende einen sich radial nach außen erstreckenden Flansch 28 auf, der sich etwa parallel zur Kraftstoffverteilerleitung 1 erstreckt. In einer Wandung 30 der Aufnahmebuchse 3 sind zwei sich gegenüberliegende und sich in Umfangsrichtung erstrecken- de Schlitze 31 ausgebildet. Zur axialen Fixierung des DruckregelventilsThe valve housing of the pressure regulating valve 8 has a bottom part 19 which is inserted into the receiving bush 3 and has the valve seat support body 9, which is either connected as an independent part to the bottom part 19 or is part of the bottom part. The bottom part 19 has a radially open sealing groove on its circumference, in which a sealing ring 27 sealing in the radial direction is arranged. The up Receiving bush 3 surrounds the bottom part 19 of the pressure control valve 8 in the axial direction from the bottom 7 continuously in an area at least so far that a secure seal between the bottom part 19 and the receiving bush 3 is ensured by the sealing ring 27. The receptacle 3 has at its end facing away from the fuel rail 1 a radially outwardly extending flange 28 which extends approximately parallel to the fuel rail 1. In a wall 30 of the receptacle 3, two slits 31 lying opposite one another and extending in the circumferential direction are formed. For axially fixing the pressure control valve
8 an der Aufnahmebuchse 3 dient eine Halteklammer 32.8 on the receptacle 3, a holding clip 32 is used.
Die Schlitze 31 in der Wandung 30 der Aufnahmebuchse 3 stellen Halteöffnungen für die U-förmige Halteklammer 32 dar. Die Halteklammer besteht aus Federdraht aus nicht-rostendem Stahl nach DIN 17224, der einen Chromgehalt von mindestens 12 % und insbesondere auch einen Nickelgehalt von mindestens 6% aufweist. Beispielsweise wird für die Halteklammer 32 Federdraht aus X12 Cr Ni 17 7 (Werk- stoffnummer 1.4310) verwendet. Wie anhand von Fig.2 am besten zu sehen ist, hat die Halteklammer 32 zwei durch eine Traverse 33 ver- bundene Schenkel 34, welche im Bereich eines sich an die TraverseThe slots 31 in the wall 30 of the receptacle 3 represent holding openings for the U-shaped holding clip 32. The holding clip consists of spring wire made of stainless steel according to DIN 17224, which has a chromium content of at least 12% and in particular also a nickel content of at least 6 % having. For example, 32 spring wire made of X12 Cr Ni 17 7 (material number 1.4310) is used for the retaining clip. As can best be seen from FIG. 2, the holding clamp 32 has two legs 34 connected by a cross member 33, which in the region of one adjoining the cross member
33 anschließenden Anfangsabschnitts 35 parallel zueinander verlaufen und in einem Mittelabschnitt 36 komplementär zu einer zyli ndrischen Haltenut 37 des Druckregelventils 8 geformte, eine imaginäre kreisförmige Fläche umschließende Kreisbögen 38 bilden, die in einen Endab- schnitt 39 münden, in welchem sich die Schenkel 34 tricherförmig erweitern. Die Halteklammer 32 ist im eingesetzten Zustand gegen die Haltenut 37 radial vorgespannt, was beispielsweise dadurch erreicht wird, daß die Schenkel vor der Montage derart zueinander gebogen werden, daß die von ihnen eingeschlossene Kreisfläche einen kleineren Radius als die Haltenut 37 hat. Um die durch den Vorbiegevorgang entstandenen Materialspannungen abzubauen, wird die Halteklammer 32 vorzugsweise anschließend angelassen, was jedoch aufgrund des geringen Verformungsgrades oft nicht erforderlich ist. Die Halteklammer 32 ist vorzugsweise ein ebenes Bauteil, d.h. ihre Schenkel 34 liegen in einer Ebene. Alternativ können den Kreisbögen 38 des Mittelabschnitts 36 Wellungen angeformt sein, welche sich in einer Ebene senkrecht zu einer die Haltenut 37 enthaltenden Ebene erstrecken. Diese Wellungen können durch je eine im wesentlichen einperiodige sinusförmige Kurve gebildet werden, wobei die Welluπg des einen Schenkels 34 gegenüber der Wellung des anderen Schenkels 34 beispielsweise um 180 Grad phasenverschoben sein kann.33 subsequent initial section 35 run parallel to one another and in a central section 36 complementary to a cylindrical holding groove 37 of the pressure regulating valve 8, form circular arcs 38 enclosing an imaginary circular surface, which open into an end section 39 in which the legs 34 widen in a funnel shape , The retaining clip 32 is biased radially against the retaining groove 37 in the inserted state, which is achieved, for example, in that the legs are bent toward one another in this way before assembly be that the circular area enclosed by them has a smaller radius than the holding groove 37. In order to relieve the material stresses resulting from the pre-bending process, the holding clamp 32 is preferably subsequently tempered, which is often not necessary due to the low degree of deformation. The holding clip 32 is preferably a flat component, ie its legs 34 lie in one plane. Alternatively, the circular arcs 38 of the central section 36 can be formed with corrugations which extend in a plane perpendicular to a plane containing the holding groove 37. These corrugations can each be formed by an essentially single-period sinusoidal curve, the corrugation of one leg 34 being 180 degrees out of phase with the corrugation of the other leg 34, for example.
Wenn das Druckregelventil 8 in die Aufnahmebuchse 3 einge- steckt ist, befinden sich die beiden Schlitze 31 der Aufnahmebuchse 3 in Flucht zur am Umfang des Druckregelventils 8 ausgebildeten Haltenut 37. Die lichte Höhe der Schlitze 31 ist geringfügig größer als der Durchmesser des Halteklammerdrahtes, so daß die Halteklammer 32 in diese tangential eingesteckt werden kann, wie am besten Fig.2 veran- schaulicht. Beim tangentialen Einsetzen der Halteklammer 32 in dieWhen the pressure regulating valve 8 is inserted into the receptacle 3, the two slots 31 of the receptacle 3 are in alignment with the retaining groove 37 formed on the circumference of the pressure regulating valve 8. The clear height of the slots 31 is slightly larger than the diameter of the retaining clip wire, so that the retaining clip 32 can be inserted tangentially into this, as best illustrated in FIG. 2. When the holding clip 32 is inserted tangentially into the
Schlitze 31 der Aufnahmebuchse 3 können deren Schenkel 34 daher in die Haltenut 37 eingreifen und laufen in ihr in Umfangsrichtung entlang. Dabei spreizen sich die Schenkel 34 zunächst auf, was durch den tricherförmig erweiterten Endabschnitt 39 erleichtert wird, bis sie mit den Kreisbögen 38 des Mittelabschnitts 36 an der Haltenut 37 einrasten und das Druckregelventil 8 beidseits formschlußartig umgreifen.Slots 31 of the receptacle 3 can therefore engage its legs 34 in the holding groove 37 and run along it in the circumferential direction. The legs 34 first spread out, which is facilitated by the funnel-shaped widened end section 39 until they engage with the circular arcs 38 of the central section 36 on the holding groove 37 and embrace the pressure control valve 8 in a form-fitting manner on both sides.
Die in der Wandung 30 der Aufnahmebuchse 3 vorhandenen Schlitze 31 erstrecken sich in radialer Richtung so tief in sie hinein, daß zwei Restbögen 40 mit einer Breite verbleiben, die im wesentlichen der Länge der Traverse 33 bzw. dem Abstand der beiden Schenkel 34 der Halteklammer 32 in ihrem Endabschnitt 39 entspricht. Die Halteklammer 32 ist dabei so lang, daß in der Montageposition sowohl ihr Anfangsabschnitt 35 mit der Traverse 33 als auch ihr tricherförmig erweiterter Endabschnitt 39 je zumindest teilweise aus den Schlitzen 31 herausragen, so daß die Schenkel 34 im Bereich der Schlitze 31 vorhandene, im wesentlichen parallel zur Ebene der Halteklammer 32 verlaufende und sich gegenüberliegende Stirnflächen 41 , 42 der Wan- düng 30 der Aufnahmebuchse 3 kreuzen. Infolgedessen kann sich dieThe slots 31 present in the wall 30 of the receiving bush 3 extend so deeply into them in the radial direction that that two remaining sheets 40 remain with a width which corresponds essentially to the length of the cross member 33 or the distance between the two legs 34 of the retaining clip 32 in its end portion 39. The retaining clip 32 is so long that both its initial section 35 with the crossmember 33 and its tricher-shaped extended end section 39 each protrude at least partially from the slots 31 in the assembly position, so that the legs 34 in the area of the slots 31 essentially exist Cross opposite and opposite end faces 41, 42 of the wall 30 of the receiving bushing 3 which run parallel to the plane of the holding clip 32. As a result, the
Halteklammer 32 in den Schlitzen 31 der Aufnahmebuchse 3 abstützten, wodurch eine Haltekraft erzeugt wird, welche das Druckregelventil 8 am Boden 7 der Aufnahmebuchse 3 hält.Support retaining clip 32 in the slots 31 of the receptacle 3, whereby a holding force is generated which holds the pressure control valve 8 at the bottom 7 of the receptacle 3.
Im Ausführungsbeispiel nach Fig.3 ist eine Sicherungsklemme 43 zur Befestigung eines Einspritzventils am Steckanschluß 2 derIn the exemplary embodiment according to FIG. 3, a securing terminal 43 for fastening an injection valve to the plug connection 2 is the
Kraftstoffverteilerleitung 1 gezeigt. Die Sicherungsklemme 43 hat eine L-fömige Kopfplatte 44 mit zwei zueinander senkrechten Schenkeln 45, 46, von deren einem Schenkel 45 zwei symmetrische Flügel 47 senkrecht weg ragen. Wie am besten Fig.4 und Fig.5 veranschaulichen, haben die Flügel 47 parallel zum anderen Schenkel 46 der KopfplatteFuel rail 1 shown. The securing clamp 43 has an L-shaped head plate 44 with two mutually perpendicular legs 45, 46, from one leg 45 of which two symmetrical wings 47 protrude vertically. As best illustrated in FIGS. 4 and 5, the wings 47 have parallel to the other leg 46 of the head plate
44 verlaufende Abschnitte 49 mit zueinander weisenden freien Rändern, die eine imaginäre kreisförmige Fläche teilweise umschließende Kreisbögen 50 bilden. Hierzu senkrechte Abschnitte 51 der Flügel 47 verlaufen in Richtung zum freien Ende des einen Schenkels 45 der Kopfplatte 44 gesehen zunächst parallel zueinander und weiten sich dann tricherförmig auf, wie Fig.4 zeigt. In beiden Schenkeln 45, 46 der Kopfplatte 44 ist außerdem je ein mittiger, vom freien Ende des jeweiligen Schenkels 45, 46 ausgehender Sackschlitz 52, 53 ausgebildet. Die Sicherungsklemme 43 besteht aus Federband aus nichtrostendem Stahl nach DIN 17224, der einen Chromgehalt von mindestens 12 % und insbesondere auch einen Nickelgehalt von mindestens 6% aufweist. Beispielsweise wird für die Sicherungsklemme Federband aus X12 Cr Ni 17 7 (Werkstoffnummer 1.4310) verwendet. 44 running sections 49 with mutually facing free edges, which form circular arches 50 partially enclosing an imaginary circular surface. To this end, vertical sections 51 of the wings 47 run in the direction of the free end of the one leg 45 of the head plate 44, initially parallel to one another and then widen in a funnel shape, as shown in FIG. In both legs 45, 46 of the head plate 44, a central blind slot 52, 53 extending from the free end of the respective leg 45, 46 is also formed. The securing clamp 43 consists of spring band made of stainless steel according to DIN 17224, which has a chromium content of at least 12% and in particular also a nickel content of at least 6%. For example, spring clip made of X12 Cr Ni 17 7 (material number 1.4310) is used for the securing terminal.

Claims

Schutzansprüche protection claims
1. Verbindung zweier koaxial hintereinander angeordneter Elemente einer Kraftstoffversorgungsanlage einer Brennkraftmaschine, wobei das erste Element (3) eine Führungsöffnung (18) hat und das zweite Element (8) mit einem Führungsabschnitt (19) in die Führungsöffnung (18) des ersten Elements (3) einsetzbar ist, das einander gegenüberl iegend in einer Wandung (30) zwei zueinander und zu einer Haltenut (37) im zweiten Element (8) fluchtende Halteöffnungen (31 ) hat, die eine U- förmige Halteklammer (32) mit ihren Schenkeln (34) durchragt und dabei die Lage des ersten (3) und zweiten Elements (8) zueinander fixiert, welche zumindest im Bereich der Halteklammer (32) Abschnitte aus nicht-rostendem Stahl aufweisen, dadurch gekennzeichnet, daß die Halteklammer (32) durch einen Federdraht aus nicht-rostendem Stahl gebildet wird.1. Connection of two coaxially arranged elements of a fuel supply system of an internal combustion engine, the first element (3) having a guide opening (18) and the second element (8) with a guide section (19) into the guide opening (18) of the first element (3 ) can be used which has two holding openings (31) which are aligned with each other in a wall (30) and which are aligned with one another and with a holding groove (37) in the second element (8) and which have a U-shaped holding bracket (32) with its legs (34 ) protrudes and thereby fixes the position of the first (3) and second element (8) to each other, which at least in the area of the holding clip (32) have sections made of stainless steel, characterized in that the holding clip (32) consists of a spring wire stainless steel is formed.
2. Verbindung nach Anspruch 1 , dadurch gekennzeichnet, daß als erstes Element eine mit einer Kraftstoffverteilerleitung (1 ) verbundene Aufnahmebuchse (3) dient, in die als zweites Element ein Druckregelventil (8) eingesetzt ist.2. Connection according to claim 1, characterized in that serves as a first element with a fuel rail (1) connected receptacle (3) into which a pressure control valve (8) is inserted as the second element.
3. Verbindung nach Anspruch 1 , dadurch gekennzeichnet, daß als erstes Element eine mit einer Kraftstoffverteilerleitung (1 ) verbundene Aufnahmebuchse (3) dient, in die als zweites Element ein Druckdämpfer eingesetzt ist. 3. Connection according to claim 1, characterized in that the first element is a with a fuel rail (1) connected receptacle (3), in which a pressure damper is inserted as the second element.
4. Verbindung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Schenkel (34) der Halteklammer (32) wenigstens abschnittsweise komplementär zu einer zylindrischen Haltenut (37) des Druckregelven- tils (8) oder des Druckdämpfers geformte, eine imaginäre Kreisfläche umschließende Kreisbögen (38) bilden.4. Connection according to claim 2 or 3, characterized in that the legs (34) of the retaining clip (32) at least in sections complementary to a cylindrical retaining groove (37) of the pressure regulating valve (8) or the pressure damper shaped circular arcs enclosing an imaginary circular area (38) form.
5. Verbindung nach Anspruch 4, dadurch gekennzeichnet, daß die Schenkel (34) der Halteklammer (32) vor dem Einsetzen in die Halte- Öffnungen (31 ) derart zueinander gebogen sind, daß die von den5. A compound according to claim 4, characterized in that the legs (34) of the retaining clip (32) are bent towards each other before insertion into the retaining openings (31) such that the
Kreisbögen (38) eingeschlossene Kreisfläche einen kleineren Radius als die Haltenut (37) hat.Circular arcs (38) enclosed circular area has a smaller radius than the holding groove (37).
6. Verbindung nach Anspruch 5, dadurch gekennzeichnet, daß die Hal- teklammer (32) nach dem Vorbiegen und vor dem Einsetzen in die6. Connection according to claim 5, characterized in that the holding bracket (32) after the pre-bending and before insertion into the
Halteöffnungen (31 ) angelassen wird.Holding openings (31) is left on.
7. Verbindung zweier koaxial hintereinander angeordneter Elemente einer Kraftstoffversorgungsanlage einer Brennkraftmaschine, wobei das erste Element ein Einspritzventil ist, das mit seinem einen Ende in einen das zweite Element bildenden Steckanschluß (2) einer Kraftstoffverteilerleitung (1 ) eingesetzt und dort mittels einer Sicherungsklemme (43) fixiert ist, wobei das Einspritzventil und der Steckanschluß (2) zumindest im Bereich der Sicherungsklemme (43) Abschnitte aus nicht-rostendem Stahl aufweisen, dadurch gekennzeichnet, daß die Sicherungsklemme (43) aus Federband aus nicht-rostendem Stahl besteht. 7. Connection of two coaxially arranged elements of a fuel supply system of an internal combustion engine, the first element being an injection valve which is inserted at one end into a plug connection (2) of a fuel distributor line (1) forming the second element and there by means of a securing clip (43) is fixed, the injection valve and the plug connection (2) at least in the area of the securing clip (43) having sections made of stainless steel, characterized in that the securing clip (43) consists of spring band made of stainless steel.
8. Verbindung nach Anspruch 7, dadurch gekennzeichnet, daß die Sicherungsklemme (43) eine L-fömige Kopfplatte (44) mit zwei zueinander senkrechten Schenkeln (45, 46) beinhaltet, von deren einem Schenkel (45) zwei symmetrische Flügel (47) senkrecht weg ragen, die parallel zum anderen Schenkel (46) der Kopfplatte (44) verlaufende8. Connection according to claim 7, characterized in that the securing clip (43) includes an L-shaped head plate (44) with two mutually perpendicular legs (45, 46), of one leg (45) two symmetrical wings (47) perpendicular protrude away, the parallel to the other leg (46) of the head plate (44)
Abschnitte (49) mit zueinander weisenden freien Rändern aufweisen, die eine imaginäre kreisförmige Fläche umschließende Kreisbögen (50) bilden, wobei hierzu senkrechte Abschnitte (51 ) der Flügel (47) in Richtung zum freien Ende des einen Schenkels (45) der Kopfplatte (44) gesehen zunächst parallel zueinander verlaufen und sich dann tricherförmig aufweiten und wobei in beiden Schenkeln (45, 46) der Kopfplatte (44) je ein mittiger, vom freien Ende des jeweiligen Schenkels (45, 46) ausgehender Sackschlitz (52, 53) ausgebildet ist.Have sections (49) with mutually facing free edges, which form an arcuate circle (50) enclosing an imaginary circular surface, with vertical sections (51) of the wings (47) towards the free end of one leg (45) of the head plate (44 ) seen initially run parallel to one another and then widen in a funnel-shaped manner and a central pocket slot (52, 53) extending from the free end of the respective leg (45, 46) is formed in each of the two legs (45, 46) of the head plate (44) ,
9. Verbindung nach Anspruch 1 oder 7, dadurch gekennzeichnet, daß der nicht-rostende Federdraht oder das nicht-rostende Federband einen Chromgehalt von mindestens 12 % und insbesondere auch einen Nickelgehalt von mindestens 6% nach DIN 17224 aufweist und insbesondere aus X 12 Cr Ni 17 7, Werkstoff nummer 1.4310 besteht. 9. A compound according to claim 1 or 7, characterized in that the non-rusting spring wire or the non-rusting spring band has a chromium content of at least 12% and in particular also a nickel content of at least 6% according to DIN 17224 and in particular X 12 Cr Ni 17 7, material number 1.4310.
EP02729786A 2001-03-13 2002-03-13 Connection by means of a retaining clip of two elements of a fuel supply system of an internal combustion engine that are coaxially disposed one behind the other Expired - Lifetime EP1373708B1 (en)

Applications Claiming Priority (3)

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DE20104270U 2001-03-13
DE20104270U DE20104270U1 (en) 2001-03-13 2001-03-13 Connection of two coaxially arranged elements of a fuel supply system of an internal combustion engine
PCT/DE2002/000892 WO2002073025A1 (en) 2001-03-13 2002-03-13 Connection by means of a retaining clip of two elements of a fuel supply system of an internal combustion engine that are coaxially disposed one behind the other

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EP1373708A1 true EP1373708A1 (en) 2004-01-02
EP1373708B1 EP1373708B1 (en) 2005-08-10

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EP (1) EP1373708B1 (en)
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Also Published As

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US20040045530A1 (en) 2004-03-11
DE50203885D1 (en) 2005-09-15
WO2002073025A1 (en) 2002-09-19
US20060124110A1 (en) 2006-06-15
RU2003129073A (en) 2005-03-27
KR20020097260A (en) 2002-12-31
DE20104270U1 (en) 2002-07-18
EP1373708B1 (en) 2005-08-10
KR100852871B1 (en) 2008-08-20

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