EP1373708B1 - 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 Download PDFInfo
- Publication number
- EP1373708B1 EP1373708B1 EP02729786A EP02729786A EP1373708B1 EP 1373708 B1 EP1373708 B1 EP 1373708B1 EP 02729786 A EP02729786 A EP 02729786A EP 02729786 A EP02729786 A EP 02729786A EP 1373708 B1 EP1373708 B1 EP 1373708B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- holding
- connection
- portions
- holding clip
- 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.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 31
- 238000002485 combustion reaction Methods 0.000 title claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000003487 electrochemical reaction Methods 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 210000002414 leg Anatomy 0.000 description 18
- 230000001105 regulatory effect Effects 0.000 description 11
- 238000007789 sealing Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004532 chromating Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 coaxially successively arranged elements of a Fuel supply system of an internal combustion engine according to the preamble of claims 1 and 7.
- a compound which for fixing a pressure control valve in a receiving bush extending transversely to a fuel rail of a motor vehicle, the one through a Einiassöfmung the fuel rail in communication standing through hole having.
- a bottom part of the pressure control valve in the through hole of the receiving socket used, the opposite each other in a wall two to each other and to a holding groove in the pressure control valve aligned slots, which is designed as a spring element, U-shaped Retaining clip with legs protruding, creating a pressure regulating valve in the receiving socket holding biasing force can be generated.
- the housing of the pressure control valve and the receiving socket consist made of stainless steel.
- the prior art retaining clips and securing clips are stamped and bent parts made of spring steel, in particular CK67, which then with a corrosion protection, for example be provided by galvanizing and Gelbchromatieren.
- CK67 spring steel
- galvanizing and Gelbchromatieren a corrosion protection
- the invention is based on the idea that, in the case of a damaged anticorrosive layer, in addition to the by externally acting, aggressive media such as saline spray water conditional corrosion also to contact corrosion due to electro-chemical reactions between the stainless steel of the interconnected elements and the partially unprotected and less spring steel of the retaining clip and the fuse terminal can come.
- the first element of the compound according to the invention is, for example, one with a fuel rail connected receiving socket, in the second element used as a pressure regulating valve is.
- the legs of the retaining clip form at least partially complementary to a cylindrical Holding the pressure control valve shaped, an imaginary circular area enclosing circular arcs. The legs are bent before insertion into the holding openings in such a way that the circular area enclosed by the circular arcs has a smaller radius than the retaining groove. Then sits the retaining clip with radial bias and thus shake-tight in the retaining groove. Order hereby can break down any material stresses caused, the retaining clip after pre-bending and be tempered before insertion into the retaining openings.
- a Fuel rail of a fuel injection system for internal combustion engines designated, which has a plurality of plug connections 2, in the Fuel injection valves are used with their one end.
- a cup-shaped Receiving socket 3 connected, for example, soldered or welded.
- the receiving socket 3 can also be on the fuel rail 1 be formed and / or at least partially in the fuel rail 1 protrude.
- In the receiving socket 3 facing Wall 4 of the fuel rail 1 is at least one Inlet opening 5 is provided, which communicates with a connection opening 6 in Bottom 7 of the receiving socket 3 is aligned.
- the inlet opening 5 and the Connection opening 6 may also have an annular shape.
- a pressure regulating valve 8 used with a valve seat carrier body 9 by a first through opening 10 in the receiving socket 3 and ei ne second Through opening 11 in the wall 4 of the fuel rail 1 sealingly in an outlet 12 protrudes.
- the outlet 12 protrudes into the fuel rail 1 and penetrates the pressure regulating valve 8 facing away wall 13 of the fuel rail 1 in an opening 14, in which it is tightly fastened, for example, soldered.
- 11 can also Inlet openings 5 and the connection opening 6 are formed so large be that the valve seat carrier body 9 while maintaining a sufficient large cross-section around its circumference through the inlet opening 5 and the connection opening 6 can be passed.
- Valve seat carrier body 9 protrudes with his from the pressure control valve. 8 outstanding end in a receiving bore 15 of the outlet 12 and is at its periphery with an elastic sealing ring sixteenth provided for sealing against the receiving bore 15.
- the Outlet 12. penetrates in the axial direction an outlet channel 17, in a manner not shown also the valve seat carrier body. 9 penetrates and to a fuel tank or the suction side of a Fuel pump leads.
- the fuel rail 1 is provided with a for scale reasons, not shown fuel supply line connected to the delivery port of the fuel pump is.
- the inlet opening 5 and the connection opening 6 form a part of an inlet channel for the fuel in the pressure control valve 8.
- the operation of such a pressure control valve is, for example known from DE 36 07 811 A1, therefore it should be on this will not be discussed further.
- the valve housing of the pressure regulating valve 8 has a bottom part 19, which is inserted into the receiving socket 3 and the valve seat carrier body 9, which either as an independent part with the bottom part 19 is connected or part of the bottom part is.
- the bottom part 19 has at its periphery a radially open sealing groove in which a in radial direction sealing sealing ring 27 is arranged.
- the receiving socket 3 encloses the bottom part 19 of the pressure regulating valve eighth in the axial direction from the bottom 7 continuing in an area at least so far completely that a secure seal between the Bottom part 19 and the receiving socket 3 ensured by the sealing ring 27 is.
- the receiving socket 3 has at its the fuel rail 1 facing away from a radially outwardly extending Flange 28, which is approximately parallel to the fuel rail 1 extends.
- In a wall 30 of the receiving socket 3 are two opposing and extending in the circumferential direction Slits 31 formed.
- the retaining 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 has a nickel content of at least 6%.
- the retaining clip 32 spring wire made of X12 Cr Ni 17 7 (material number 1.4310).
- the retaining clip 32 has two connected by a crossbar 33 Leg 34, which in the area of a to the crossbar 33 subsequent initial section 35 parallel to each other and in a central portion 36 complementary to a cylindrical one Holding groove 37 of the pressure regulating valve 8 shaped, an imaginary circular Form enclose circular arcs 38, which in an end portion 39 open, in which the legs 34 extend funnel-shaped.
- the retaining clip 32 is in the inserted state against the Holding groove 37 radially biased, which achieved, for example is that the legs bent before assembly in such a way be that the circular area enclosed by them a smaller Radius than the retaining groove 37 has.
- the retaining clip 32 preferably subsequently tempered, but due to the low degree of deformation is often not required.
- the retaining clip 32 is preferably a planar member, i. her legs 34 are in a plane.
- the circular arcs 38 of the middle section 36 corrugations be formed, which are in one plane extend perpendicular to a plane containing the retaining groove 37.
- These corrugations can each be essentially one-periodic sinusoidal curve are formed, with the corrugation of the one Leg 34 opposite the corrugation of the other leg 34, for example 180 degrees out of phase.
- the present in the wall 30 of the receiving socket 3 Slits 31 extend so deeply into them in the radial direction, that two residual sheets 40 remain with a width substantially the length of the traverse 33 and the distance between the two legs 34 corresponds to the retaining clip 32 in its end portion 39.
- the Retaining clip 32 is so long that both in the mounting position her initial section 35 with the cross member 33 and her tricherförmig extended end portion 39 depending at least partially from the slots 31 protrude, so that the legs 34 in the region of the slots 31st existing, substantially parallel to the plane of the retaining clip 32nd extending and opposite end faces 41, 42 of the wall 30 of the receiving socket 3 intersect.
- the Retaining clip 32 supported in the slots 31 of the receiving socket 3, whereby a holding force is generated, which the pressure regulating valve 8 at the bottom 7 of the receiving socket 3 stops.
- FIG. 3 is a fuse terminal 43 for attaching an injector to the connector 2 of Fuel distribution line 1 shown.
- the fuse terminal 43 has a L-shaped head plate 44 with two mutually perpendicular legs 45, 46, of which one leg 45 two symmetrical wings 47 vertically protrude away.
- the fuse terminal 43 has a L-shaped head plate 44 with two mutually perpendicular legs 45, 46, of which one leg 45 two symmetrical wings 47 vertically protrude away.
- FIGS. 4 and 5 have the wings 47 parallel to the other leg 46 of the top plate 44 extending sections 49 with mutually facing free edges, the an imaginary circular area partially enclosing Arcs 50 form.
- the wings 47th extend in the direction of the free end of the one leg 45 of the Head plate 44 seen initially parallel to each other and widen then funnel-shaped, as Figure 4 shows.
- both thighs 45, 46 of the Head plate 44 is also each a center, from the free end of the respective Leg 45, 46 outgoing bag slot 52, 53 formed.
- the fuse terminal 43 is made of spring band 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%.
- the fuse terminal spring band made of X12 Cr Ni 17 7 (material number 1.4310).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Description
Die Erfindung geht aus von einer Verbindung zweier koaxial hintereinander angeordneter Elemente einer Kraftstoffversorgungsanlage einer Brennkraftmaschine nach der Gattung der Ansprüche 1 und 7.The invention is based on a connection of two coaxially successively arranged elements of a Fuel supply system of an internal combustion engine according to the preamble of claims 1 and 7.
Aus der DE 36 07 811 A 1 ist eine Verbindung bekannt, welche zur Fixierung eines Druckregelventils in einer quer zu einer Kraftstoffverteilerleitung eines Kraftfahrzeugs verlaufenden Aufnahmebuchse dient, die eine mit einer Einiassöfmung der Kraftstoffverteilerleitung in Verbindung stehende Durchgangsbohrung aufweist. Dazu ist ein Bodenteil des Druckregelventils in die Durchgangsbohrung 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.From DE 36 07 811 A 1, a compound is known, which for fixing a pressure control valve in a receiving bush extending transversely to a fuel rail of a motor vehicle, the one through a Einiassöfmung the fuel rail in communication standing through hole having. For this purpose, a bottom part of the pressure control valve in the through hole of the receiving socket used, the opposite each other in a wall two to each other and to a holding groove in the pressure control valve aligned slots, which is designed as a spring element, U-shaped Retaining clip with legs protruding, creating a pressure regulating valve in the receiving socket holding biasing force can be generated. The housing of the pressure control valve and the receiving socket consist made of stainless steel.
Darüber hinaus ist aus der WO 90/15240 A eine Sicherungsklemme 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, from WO 90/15240 A a fuse terminal for attachment of injectors at plug connections of a fuel rail known, wherein the injection valve and the Plug-in connection, at least in the area of the securing clip Sections of stainless steel exhibit.
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 zu Korrosion und im schlimmsten Fall zum Bruch und Totalausfall dieser Bauteile kommen kann.The prior art retaining clips and securing clips are stamped and bent parts made of spring steel, in particular CK67, which then with a corrosion protection, for example be provided by galvanizing and Gelbchromatieren. When mounting the holding and However, securing clips will often damage the anticorrosive layer, causing it to corrosion and in the worst case may lead to breakage and total failure of these components.
Die Erfindung basiert auf dem Gedanken, dass es bei beschädigter Korrosionsschutzschicht neben der durch von außen einwirkende, aggressive Medien wie beispielsweise durch salzhaltiges Spritzwasser bedingten Korrosion auch zu Kontaktkorrosion aufgrund elektro-chemischer Reaktionen zwischen dem nicht-rostenden Stahl der miteinander verbundenen Elemente und dem stellenweise ungeschützten und unedleren Federstahl der Halteklammer und der Sicherungsklemme kommen kann.The invention is based on the idea that, in the case of a damaged anticorrosive layer, in addition to the by externally acting, aggressive media such as saline spray water conditional corrosion also to contact corrosion due to electro-chemical reactions between the stainless steel of the interconnected elements and the partially unprotected and less spring steel of the retaining clip and the fuse terminal can come.
Aufgrund der erfindungsgemäßen Verwendung von nicht-rostendem Stahl für die Halteklammer gemäß Anspruch 1 und für die Sicherungsklemme gemäß Anspruch 7 liegen dann in Bezug auf die durch diese Bauteile miteinander verbundenen Elemente gleichartige Werkstoffe vor. 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, Gelbchromatieren oder Verzinken verzichtet werden. Due to the inventive use of stainless steel for the retaining clip according to Claim 1 and for the fuse terminal according to claim 7 are then in relation to the through this Components interconnected elements similar materials before. As a result, are electrochemical Reactions between retaining clip or securing clamp on the one hand and through them interconnected elements of the fuel supply system largely excluded. Especially can be applied to 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.The measures listed in the dependent claims are advantageous developments and Improvements of the compounds specified in claims 1 and 7 possible.
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 dem Vorbiegen und vor dem Einsetzen in die Halteöffnungen angelassen werden.The first element of the compound according to the invention is, for example, one with a fuel rail connected receiving socket, in the second element used as a pressure regulating valve is. The legs of the retaining clip form at least partially complementary to a cylindrical Holding the pressure control valve shaped, an imaginary circular area enclosing circular arcs. The legs are bent before insertion into the holding openings in such a way that the circular area enclosed by the circular arcs has a smaller radius than the retaining groove. Then sits the retaining clip with radial bias and thus shake-tight in the retaining groove. Order hereby can break down any material stresses caused, the retaining clip after pre-bending and be tempered before insertion into the retaining openings.
Ausführungsbeispiele der Erfindung sind 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;
- Fig.2
- einen Schnitt entlang der Linie II-II von Fig.1;
- Fig.3
- eine Seitenansicht der Sicherungsklemme;
- Fig.4
- eine Stirnansicht der Sicherungsklemme von Fig.3;
- Fig.5
- eine Draufsicht auf die Sicherungsklemme von Fig.3.
- Fig.1
- a cross-sectional view through a connection of a pressure regulating valve with a fuel rail;
- Fig.2
- a section along the line II-II of Figure 1;
- Figure 3
- a side view of the fuse terminal;
- Figure 4
- an end view of the fuse terminal of Figure 3;
- Figure 5
- a plan view of the fuse terminal of Figure 3.
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 verschweißt.
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 die
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 durch eine
erste Durchstecköffnung 10 in der Aufnahmebuchse 3 und ei ne zweite
Durchstecköffnung 11 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, 11 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 Auslaßstutzens
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 Druckregelventil
8. Die Funktionsweise eines solchen Druckregelventils ist beispielsweise
aus der DE 36 07 811 A1 bekannt, deshalb soll hierauf
nicht weiter eingegangen werden.In the embodiment according to Fig.1 and Fig.2 is with 1 a
Fuel rail of a fuel injection system for internal combustion engines
designated, which has a plurality of plug connections 2, in the
Fuel injection valves are used with their one end. With the
Wall of the fuel rail 1 is a cup-shaped
Receiving
Das Ventilgehäuse des Druckregelventils 8 hat ein Bodenteil 19,
das in die Aufnahmebuchse 3 eingesteckt ist und den Ventilsitzträgerkörper
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 Aufnahmebuchse
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 gewährleistet
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 erstreckende
Schlitze 31 ausgebildet. Zur axialen Fixierung des Druckregelventils
8 an der Aufnahmebuchse 3 dient eine Halteklammer 32.The valve housing of the pressure regulating valve 8 has a
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 (Werkstoffnummer
1.4310) verwendet. Wie anhand von Fig.2 am besten zu
sehen ist, hat die Halteklammer 32 zwei durch eine Traverse 33 verbundene
Schenkel 34, welche im Bereich eines sich an die Traverse
33 anschließenden Anfangsabschnitts 35 parallel zueinander verlaufen
und in einem Mittelabschnitt 36 komplementär zu einer zylindrischen
Haltenut 37 des Druckregelventils 8 geformte, eine imaginäre kreisförmige
Fläche umschließende Kreisbögen 38 bilden, die in einen Endabschnitt
39 münden, in welchem sich die Schenkel 34 trichterförmig 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 Wellung des einen
Schenkels 34 gegenüber der Wellung des anderen Schenkels 34 beispielsweise
um 180 Grad phasenverschoben sein kann.Make the
Wenn das Druckregelventil 8 in die Aufnahmebuchse 3 eingesteckt
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 veranschaulicht.
Beim tangentialen Einsetzen der Halteklammer 32 in die
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.When the pressure regulating valve 8 is inserted into the receiving
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 Wandung
30 der Aufnahmebuchse 3 kreuzen. Infolgedessen kann sich die
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.The present in the
Im Ausführungsbeispiel nach Fig.3 ist eine Sicherungsklemme
43 zur Befestigung eines Einspritzventils am Steckanschluß 2 der
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 Kopfplatte
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 trichterförmig 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. In the embodiment of Figure 3 is a
Die Sicherungsklemme 43 besteht aus Federband 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 Sicherungsklemme Federband
aus X12 Cr Ni 17 7 (Werkstoffnummer 1.4310) verwendet.The
Claims (9)
- Connection of two coaxially series-arranged elements of a fuel supply system of an internal combustion engine, the first element (3) having a guide orifice (18), and the second element (8) being insertable with a guide portion (19) into the guide orifice (18) of the first element (3) which has, opposite one another in a wall (30), two holding orifices (31) which are aligned with one another and with a holding groove (37) in the second element (8) and through which a U-shaped holding clip (32) projects with its legs (34) and at the same time fixes the relative position of the first (3) and of the second (8) element which, at least in the region of the holding clip (32), have portions consisting of stainless steel, characterized in that the holding clip (32) is formed by a spring wire consisting of stainless steel, the portions of the first (3) and of the second (8) element, at least in the region of the holding clip (32), and the holding clip (32) being identical materials, to avoid electrochemical reactions between the holding clip (32) and the portions of the first (3) and of the second (8) element in the region of the holding clip (32).
- Connection according to Claim 1, characterized in that a reception bush (3), which is connected to a fuel distributor line (1) and into which a pressure-regulating valve (8) is inserted as the second element, serves as the first element.
- Connection according to Claim 1, characterized in that a reception bush (3), which is connected to a fuel distributor line (1) and into which a pressure damper is inserted as the second element, serves as a first element.
- Connection according to Claim 2 or 3, characterized in that the legs (34) of the holding clip (32) at least partially form circle arcs (38) which are shaped complementarily to a cylindrical holding groove (37) of the pressure-regulating valve (8) or of the pressure damper and which surround an imaginary circular area.
- Connection according to Claim 4, characterized in that the legs (34) of the holding clip (32), before being inserted into the holding orifices (31), are bent with respect to one another in such a way that the circular area enclosed by the circle arcs (38) has a smaller radius than the holding groove (37).
- Connection according to Claim 5, characterized in that the holding clip (32) is tempered after being prebent and before being inserted into the holding orifices (31).
- Connection of two coaxially series-arranged elements of a fuel supply system of an internal combustion engine, the first element being an injection valve which is inserted with one end into a plug connection (2), forming the second element, on a fuel distributor line (1) and which is fixed there by means of a securing clamp (43), the injection valve and the plug connection (2) having, at least in the region of the securing clamp (43), portions consisting of stainless steel, characterized in that the securing clamp (43) is composed of a spring band consisting of stainless steel, the portions of the injection valve and of the plug connection (2), at least in the region of the securing clamp (43), and the securing clamp (43) being identical materials, to avoid electrochemical reactions between the securing clamp (43) and the portions of the injection valve and of the plug connection (2) in the region of the securing clamp (43).
- Connection according to Claim 7, characterized in that the securing clamp (43) contains an L-shaped head plate (44) with two legs (45, 46) which are perpendicular to one another and from one leg (45) of which project away perpendicularly two symmetrical wings (47) which have portions (49) running parallel to the other leg (46) of the head plate (44) and having free edges which point towards one another and which form circle arcs (50) surrounding an imaginary circular area, portions (51), perpendicular thereto, of the wings (47) first running parallel to one another, as seen in the direction of the free end of the one leg (45) of the head plate (44) and then widening in a funnel-shaped manner, and each of the two legs (45, 46) of the head plate (44) having formed in it a central blind slot (52, 53) emanating from the free end of the respective leg (45, 46).
- Connection according to Claim 1 or 7, characterized in that the stainless spring wire or the stainless 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, consists of X 12 Cr Ni 17 7, material number 1.4310.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1373708A1 EP1373708A1 (en) | 2004-01-02 |
EP1373708B1 true EP1373708B1 (en) | 2005-08-10 |
Family
ID=7954177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02729786A Expired - Lifetime EP1373708B1 (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 |
Country Status (6)
Country | Link |
---|---|
US (2) | US20040045530A1 (en) |
EP (1) | EP1373708B1 (en) |
KR (1) | KR100852871B1 (en) |
DE (2) | DE20104270U1 (en) |
RU (1) | RU2003129073A (en) |
WO (1) | WO2002073025A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1703121A1 (en) * | 2005-02-24 | 2006-09-20 | Siemens VDO Automotive S.p.A. | Clip and fuel injector assembly |
EP1849995B1 (en) | 2006-04-24 | 2011-08-10 | Continental Automotive GmbH | Coupling arrangement for mounting an injector in a fuel rail |
EP1892408B1 (en) * | 2006-08-21 | 2009-10-21 | Continental Automotive GmbH | Injector, fuel cup and holder |
JP4862778B2 (en) | 2007-08-15 | 2012-01-25 | 日産自動車株式会社 | Fuel damper fixing clip |
US8206131B2 (en) * | 2007-10-12 | 2012-06-26 | Nippon Soken, Inc. | Fuel pump |
EP2148082B1 (en) | 2008-07-24 | 2011-10-19 | Continental Automotive GmbH | Coupling arrangement for an injection valve and injection valve |
EP2221469B1 (en) * | 2009-02-18 | 2011-10-12 | Continental Automotive GmbH | Fastening element and fluid injector assembly |
DE102012206887A1 (en) * | 2012-04-26 | 2013-10-31 | Robert Bosch Gmbh | Arrangement with a fuel distributor and a plurality of fuel injection valves |
CN102748180B (en) * | 2012-07-04 | 2014-10-29 | 力帆实业(集团)股份有限公司 | Mounting bracket for fuel gas nozzle of automobile engine |
EP3309385A1 (en) * | 2016-10-12 | 2018-04-18 | Continental Automotive GmbH | Injector cup, spring clip, fluid injection assembly and method for its assembling |
DE102017108270B4 (en) * | 2017-04-19 | 2023-11-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Sealing cassette for an injector of an internal combustion engine and injector arrangement for an internal combustion engine |
WO2023069526A1 (en) | 2021-10-19 | 2023-04-27 | Stanadyne Llc | Axisymmetric injector hold-down load ring |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2926490A1 (en) * | 1979-06-30 | 1981-02-05 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM |
DE3607811A1 (en) * | 1986-03-08 | 1987-09-10 | Bosch Gmbh Robert | Connection for two elements arranged coaxially in tandem |
JP2749839B2 (en) * | 1988-10-31 | 1998-05-13 | 株式会社デンソー | Engine fuel injection device |
US5000614A (en) * | 1989-05-05 | 1991-03-19 | Huron Products Corporation | Conduit quick connector assembly having a ramped housing with a hair pin retainer |
DE3918410A1 (en) * | 1989-06-06 | 1990-12-13 | Bosch Gmbh Robert | FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES |
US5003933A (en) * | 1989-11-06 | 1991-04-02 | General Motors Corporation | Integrated induction system |
US5058555A (en) * | 1990-04-23 | 1991-10-22 | Handy & Harman Automotive Group, Inc. | Modular fuel injector pod and fuel injection system |
US5111794A (en) * | 1990-06-29 | 1992-05-12 | Siemens Automotive L.P. | Fuel rail for bottom and side fed injectors |
US5035224A (en) * | 1990-07-06 | 1991-07-30 | Siemens Automotive L.P. | Clip retention of a split-stream fuel injector to a fuel rail cup including circumferential locator |
US5070844A (en) * | 1990-07-23 | 1991-12-10 | Siemens Automotive L.P. | Composite fuel rail socket for bottom- and side-feed fuel injectors |
US5146896A (en) * | 1991-07-25 | 1992-09-15 | Siemens Automotive L.P. | Mounting fuel injection system components on a fuel rail |
DE4111988C2 (en) * | 1991-04-12 | 1994-07-14 | Bosch Gmbh Robert | Fuel distributor |
US5394900A (en) * | 1992-12-15 | 1995-03-07 | Nippondenso Co., Ltd. | Pressure regulating valve |
US5390638A (en) * | 1994-02-25 | 1995-02-21 | Siemens Automotive L.P. | Fuel rail assembly |
AT402224B (en) * | 1994-11-04 | 1997-03-25 | Boehler Edelstahl | USE OF AN IRON BASED ALLOY AND PLUNGER PISTON AND PISTON RING |
DE19522042A1 (en) * | 1995-06-17 | 1996-12-19 | Bosch Gmbh Robert | Pressure control valve for IC engine fuel supply |
DE19647586A1 (en) * | 1996-11-18 | 1998-05-20 | Bosch Gmbh Robert | Distribution device for fuel injection systems |
US6053149A (en) * | 1998-05-28 | 2000-04-25 | Siemens Automotive Corporation | Fuel injector clip retention arrangement |
US6032651A (en) * | 1998-05-28 | 2000-03-07 | Siemens Automotive Corporation | Fuel rail damper |
-
2001
- 2001-03-13 DE DE20104270U patent/DE20104270U1/en not_active Expired - Lifetime
-
2002
- 2002-03-13 US US10/275,313 patent/US20040045530A1/en not_active Abandoned
- 2002-03-13 KR KR1020027015087A patent/KR100852871B1/en not_active IP Right Cessation
- 2002-03-13 DE DE50203885T patent/DE50203885D1/en not_active Expired - Lifetime
- 2002-03-13 RU RU2003129073/06A patent/RU2003129073A/en not_active Application Discontinuation
- 2002-03-13 WO PCT/DE2002/000892 patent/WO2002073025A1/en active IP Right Grant
- 2002-03-13 EP EP02729786A patent/EP1373708B1/en not_active Expired - Lifetime
-
2006
- 2006-02-06 US US11/347,268 patent/US20060124110A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
KR100852871B1 (en) | 2008-08-20 |
US20060124110A1 (en) | 2006-06-15 |
KR20020097260A (en) | 2002-12-31 |
RU2003129073A (en) | 2005-03-27 |
WO2002073025A1 (en) | 2002-09-19 |
EP1373708A1 (en) | 2004-01-02 |
US20040045530A1 (en) | 2004-03-11 |
DE20104270U1 (en) | 2002-07-18 |
DE50203885D1 (en) | 2005-09-15 |
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