EP0937892B1 - Device for removing pressure tubes from injection units in internal combustion engines - Google Patents
Device for removing pressure tubes from injection units in internal combustion engines Download PDFInfo
- Publication number
- EP0937892B1 EP0937892B1 EP99100669A EP99100669A EP0937892B1 EP 0937892 B1 EP0937892 B1 EP 0937892B1 EP 99100669 A EP99100669 A EP 99100669A EP 99100669 A EP99100669 A EP 99100669A EP 0937892 B1 EP0937892 B1 EP 0937892B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure pipe
- connection piece
- injection
- groove
- bore
- 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
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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
-
- 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
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- 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 relates to a device according to the preamble of the claim 1, respectively. of claim 2.
- a device is for example known from the publication WO 97 02426 A.
- the invention is therefore based on the object of a device for easy disassembly to develop the pressure pipe.
- the dowel pin also connects the pressure pipe and the connector with a positive fit, so that the pressure pipe is easily pulled out of the hole in the cylinder head when dismantling can be without hindering the rotation of the connector becomes.
- Fig. 1 shows in section a cylinder head 1 with an injection device which essentially consisting of an injection element 2, a pressure pipe 3 and a connecting element 4 is formed for connecting an injection line.
- the pressure pipe 3 penetrates the cylinder head 1 in a bore 5.
- the pressure pipe is on for sealing both ends with spherical sealing surfaces and is between connector 4 and the injection element 2 clamped. It has now become injectors this type shown that the pressure pipe 3 is difficult to remove from the bore 5 lets pull this problem out according to the invention on the one hand solved that one provides a spring clip 6, which the pressure pipe 3 and the connector 4 connects in such a positive manner that the pressure pipe 3 is connected via the connector 4 can pull out.
- the pressure pipe 3 on the Connector 4 facing end with a circumferential groove 7, in which the spring clip 6 engages.
- this has lateral recesses 8a, 8b (see also FIG. 2). The spring clip 6 is thus held in these recesses 8a, 8b so that it does not move axially can.
- the connector 4 When dismantling, the connector 4 is first unscrewed from the cylinder head 1, the spring clip 6 rotates with it.
- the spring clip can be in the groove 7 6 also turn relative to the pressure pipe 3, but is in the axial direction performed and consequently takes the pressure pipe when unscrewing the connector 4 3 with.
- a section II-II is shown in FIG. 2.
- the spring clip 6 is in the groove 7 of the pressure pipe 3 and is guided axially in this groove.
- the axial guidance of the spring clip 6 in the connector 4 is accomplished by the recesses 8a and 8b.
- FIG. 3 A further embodiment for dismantling the pressure pipe 3 is shown in FIG. 3.
- the pressure pipe 3 again has a circumferential groove 7.
- at least one dowel pin 9a is provided here, which connects the connecting piece 4 penetrates in a hole.
- the Dowel pin 9a via the groove 7, the pressure pipe 3 from the bore 5 in the cylinder head 1.
- a second roll pin 9b can also be provided.
- Fig. 4 shows a section IV-IV in the plane of the groove 7.
- the dowel pins 9a, 9b penetrate the connector 4 and are axially in the circumferential groove 7 of the pressure pipe 3 led.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung bezieht sich auf eine Vorrichtung gemäß dem Gattungsbegriff des Patentanspruches 1,bzw. des Patentanspruchs 2. Eine derartige Vorrichtung ist beispielsweise aus der Druckschrift WO 97 02426 A bekannt.The invention relates to a device according to the preamble of the claim 1, respectively. of claim 2. Such a device is for example known from the publication WO 97 02426 A.
Bei Einspritzeinrichtungen, bei denen ein Einspritzelement in Verlängerung der Zylinderachse angeordnet ist und die Einspritzleitung seitlich an den Zylinderkopf herangeführt wird ist der Zylinderkopf mit einer Bohrung versehen, durch welche ein Druckrohr geführt wird, um die Einspritzleitung über ein Anschlußstück mit dem Einspritzelement in Form einer Einspritzdüse oder eines Injektors bei Common Rail zu verbinden. Bei einer Einspritzeinrichtung dieser Art hat es sich gezeigt, daß bei einer Demontage große Schwierigkeiten bei der Herausnahme des Druckrohres auftreten.In the case of injection devices in which an injection element extends the cylinder axis is arranged and the injection line leads laterally to the cylinder head the cylinder head is provided with a hole through which a pressure pipe is guided to the injection line via a connector with the injection element to connect in the form of an injection nozzle or an injector in common rail. With an injection device of this type, it has been shown that during disassembly great difficulty in removing the pressure pipe.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zur leichten Demontage des Druckrohres zu entwickeln.The invention is therefore based on the object of a device for easy disassembly to develop the pressure pipe.
Gelöst wird diese Aufgabe zum einen durch die kennzeichnenden Merkmale des Patentanspruches 1.This problem is solved on the one hand by the characterizing features of the patent claim 1.
Durch die formschlüssige Verbindung die der Federbügel zwischen dem Anschlußstück und dem Druckrohr herstellt kann das Druckrohr ohne weiteres aus der Bohrung im Zylinderkopf herausgezogen werden. Der Federbügel behindert dabei nicht die beim Herausschrauben notwendige Drehung des Anschlußstückes. Due to the positive connection of the spring clip between the connector and the pressure pipe manufactures the pressure pipe easily from the bore be pulled out in the cylinder head. The spring clip does not hinder the necessary rotation of the connector when unscrewing.
Die gleiche Aufgabe kann zum anderen durch die kennzeichnenden Merkmale des Patentanspruches 2 gelöst werden.The same task can be achieved by the characterizing features of the claim 2 can be solved.
Der Spannstift verbindet ebenfalls das Druckrohr und das Anschlußstück formschlüssig, so daß das Druckrohr bei Demontage leicht aus der Bohrung im Zylinderkopf herausgezogen werden kann, ohne daß dabei die Drehbewegung des Anschlußstückes behindert wird.The dowel pin also connects the pressure pipe and the connector with a positive fit, so that the pressure pipe is easily pulled out of the hole in the cylinder head when dismantling can be without hindering the rotation of the connector becomes.
Ausführungsbeispiele der Erfindung sind an Hand von Zeichnungen dargestellt. Es zeigt:
- Fig. 1
- einen Schnitt durch einen Zylinderkopf mit Anschlußstück und Druckrohr, sowie einer Demontagevorrichtung
- Fig. 2
- einen Schnitt II-II in der Ebene der Demontagevorrichtung
- Fig. 3
- einen Schnitt durch einen Zylinderkopf mit Anschlußstück und Druckrohr, sowie einer Demontagevorrichtung
- Fig. 4
- einen Schnitt IV-IV in der Ebene der Demontagevorrichtung
- Fig. 1
- a section through a cylinder head with connector and pressure pipe, and a disassembly device
- Fig. 2
- a section II-II in the plane of the dismantling device
- Fig. 3
- a section through a cylinder head with connector and pressure pipe, and a disassembly device
- Fig. 4
- a section IV-IV in the plane of the dismantling device
Fig. 1 zeigt im Schnitt einen Zylinderkopf 1 mit einer Einspritzeinrichtung die im wesentlichen
aus einem Einspritzelement 2, einem Druckrohr 3 und einem Anschlußelement
4 zum Anschluß einer Einspritzleitung gebildet wird. Das Druckrohr 3 durchdringt
den Zylinderkopf 1 in einer Bohrung 5. Zur Abdichtung ist das Druckrohr an
beiden Enden mit balligen Dichtflächen versehen und wird zwischen Anschlußstück 4
und dem Einspritzelement 2 eingespannt. Es hat sich nun bei Einspritzeinrichtungen
dieser Art gezeigt, daß sich das Druckrohr 3 bei Demontage nur schwer aus der Bohrung
5 herausziehen läßt Dieses Problem wird erfindungsgemäß zum einen dadurch
gelöst, daß man einen Federbügel 6 vorsieht, welcher das Druckrohr 3 und das Anschlußstück
4 derart formschlüssig verbindet, daß man das Druckrohr 3 über das Anschlußstück
4 herausziehen kann. Zu diesem Zweck ist das Druckrohr 3 an dem, dem
Anschlußstück 4 zugewandten Ende mit einer umlaufenden Nut 7 versehen, in welche
der Federbügel 6 eingreift. Zur Verbindung von Federbügel 6 und Anschlußstück 4
weist dieses seitliche Ausnehmungen 8a, 8b auf (siehe auch Fig. 2). Der Federbügel 6
ist also in diesen Ausnehmungen 8a, 8b so gehalten, daß er sich nicht axial verschieben
kann.Fig. 1 shows in section a cylinder head 1 with an injection device which essentially
consisting of an injection element 2, a
Bei der Demontage wird zunächst das Anschlußstück 4 aus dem Zylinderkopf 1 herausgeschraubt,
wobei sich der Federbügel 6 mitdreht. In der Nut 7 kann sich der Federbügel
6 gegenüber dem Druckrohr 3 ebenfalls drehen, ist jedoch in axialer Richtung
geführt und nimmt folglich beim Herausschrauben des Anschlußstückes 4 das Druckrohr
3 mit.When dismantling, the
Einen Schnitt II-II zeigt Fig. 2. Der Federbügel 6 steckt in der Nut 7 des Druckrohres 3
und wird in dieser Nut axial geführt. Die axiale Führung des Federbügels 6 im Anschlußstück
4 wird durch die Ausnehmungen 8a und 8b bewerkstelligt.A section II-II is shown in FIG. 2. The
Eine weitere Ausführungsform zur Demontage des Druckrohres 3 ist in Fig. 3 dargestellt.
Das Druckrohr 3 weist wieder eine umlaufende Nut 7 auf. An Stelle des Federbügels
ist hier mindestens ein Spannstift 9a vorgesehen, welcher das Anschlußstück 4
in einer Bohrung durchdringt. Beim Herausschrauben des Anschlußstückes 4 zieht der
Spannstift 9a über die Nut 7 das Druckrohr 3 aus der Bohrung 5 im Zylinderkopf 1.
Neben dem Spannstift 9a kann noch ein zweiter Spannstift 9b vorgesehen werden.A further embodiment for dismantling the
Fig. 4 zeigt einen Schnitt IV-IV in der Ebene der Nut 7. Die Spannstifte 9a, 9b durchdringen
das Anschlußstück 4 und sind axial in der umlaufenden Nut 7 des Druckrohres
3 geführt.Fig. 4 shows a section IV-IV in the plane of the groove 7. The
Claims (2)
- Device for disassembling pressure pipes on the injection units of internal combustion engines in which the injection unit is composed of a connection piece (4), a pressure pipe (3) and an injection element (2), the pressure pipe passing through a bore in the cylinder head and being clamped between the injection element and the connection piece, characterised in that the pressure pipe (3) features a circumferential groove (7) at the end facing the connection piece (4), that the connection piece (4) is provided with recesses (8a, 8b) which in the installation position are in the same plane as the groove (7) and that a U-shaped spring bow (6) is pushed over the recess (8a, 8b) and the groove (7) so that an axial positive connection is established while at the same time the pressure pipe (3) and the connection piece (4) can be turned against each other.
- Device for disassembling pressure pipes on the injection units of internal combustion engines in which the injection unit is composed of a connection piece (4), a pressure pipe (3) and an injection element (2), the pressure pipe passing through a bore in the cylinder head and being clamped between the injection element and the connection piece, characterised in that the pressure pipe (3) features a circumferential groove (7) at the end facing the connection piece (4), that the connection piece (4) is provided with at least one bore which in the installation position come to rest in the same plane as the groove (7) and that a spring pin (9a) is pressed into said bore so that an axial positive connection is established between the groove (7) in the pressure pipe (3) and the connection piece (4) while at the same time the pressure pipe (3) can be turned relative to the connection piece (4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19807711A DE19807711A1 (en) | 1998-02-24 | 1998-02-24 | Device for dismantling pressure pipes on ice injection units of internal combustion engines |
| DE19807711 | 1998-02-24 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0937892A2 EP0937892A2 (en) | 1999-08-25 |
| EP0937892A3 EP0937892A3 (en) | 2003-01-02 |
| EP0937892B1 true EP0937892B1 (en) | 2003-09-24 |
Family
ID=7858741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99100669A Expired - Lifetime EP0937892B1 (en) | 1998-02-24 | 1999-01-15 | Device for removing pressure tubes from injection units in internal combustion engines |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0937892B1 (en) |
| DE (2) | DE19807711A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19945158C1 (en) * | 1999-09-21 | 2000-12-07 | Siemens Ag | Leakage connection for attaching leakage line to fuel injector |
| CN111577499B (en) * | 2020-04-26 | 2021-11-05 | 安徽航瑞航空动力装备有限公司 | Oil inlet device of side oil inlet oil injector and engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8134504U1 (en) * | 1981-11-26 | 1983-10-06 | Bayerische Motoren Werke Ag, 8000 Muenchen | FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES |
| DE9206268U1 (en) * | 1992-05-09 | 1993-09-09 | Robert Bosch Gmbh, 70469 Stuttgart | Fuel supply device for an injection nozzle |
| DE4239173C1 (en) * | 1992-11-21 | 1993-09-02 | Mercedes-Benz Aktiengesellschaft, 70327 Stuttgart, De | Cylinder-head for fuel-injection engine - has pressure pipe passing through clamping screw and with union at protruding end for injection pipe |
| US5775303A (en) * | 1995-06-30 | 1998-07-07 | Cummins Engine Company, Inc. | High Pressure Fuel Line Connection |
| DE19524520A1 (en) * | 1995-07-05 | 1997-01-09 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
| DE19608574A1 (en) * | 1996-03-06 | 1997-09-11 | Bosch Gmbh Robert | Fuel supply device |
-
1998
- 1998-02-24 DE DE19807711A patent/DE19807711A1/en not_active Withdrawn
-
1999
- 1999-01-15 EP EP99100669A patent/EP0937892B1/en not_active Expired - Lifetime
- 1999-01-15 DE DE59907068T patent/DE59907068D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE19807711A1 (en) | 1999-09-09 |
| DE59907068D1 (en) | 2003-10-30 |
| EP0937892A2 (en) | 1999-08-25 |
| EP0937892A3 (en) | 2003-01-02 |
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