EP1373709A1 - Kraftstoff-einspritzvorrichtung für brennkraftmaschinen, insbesondere common-rail-injektor, mit einem rücklaufanschluss - Google Patents
Kraftstoff-einspritzvorrichtung für brennkraftmaschinen, insbesondere common-rail-injektor, mit einem rücklaufanschlussInfo
- Publication number
- EP1373709A1 EP1373709A1 EP02732353A EP02732353A EP1373709A1 EP 1373709 A1 EP1373709 A1 EP 1373709A1 EP 02732353 A EP02732353 A EP 02732353A EP 02732353 A EP02732353 A EP 02732353A EP 1373709 A1 EP1373709 A1 EP 1373709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection device
- fuel
- fuel injection
- plug
- socket part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/002—Arrangement of leakage or drain conduits in or from 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
Definitions
- the present invention relates to a fuel injection device for internal combustion engines, in particular a common rail injector, with a housing, with a high-pressure fuel connection, and with a fuel return connection, which comprises a plug part for connection to a fuel return line.
- Such a fuel injection device is known from the market. It is used, for example, in internal combustion engines in which the fuel is injected directly into the combustion chamber of the internal combustion engine. This can be both diesel internal combustion engines and gasoline internal combustion engines.
- the known fuel injection device is arranged directly on the cylinder head of the internal combustion engine. A high pressure pump and a fuel manifold supply your fuel under very high pressure.
- Excess fuel that is not supplied to the combustion chamber by the fuel injection device is led away from the fuel injection device via a fuel return and, for example, gets back into the fuel tank or to the high-pressure pump.
- the return line is connected to the known fuel Injector at the axial end of the fuel injector remote from the cylinder head.
- a plug part can be inserted into an opening in the housing of the fuel injection device.
- the fuel return line can in turn be connected to this plug part.
- the object of the present invention is therefore to develop a fuel injection device of the type mentioned at the outset in such a way that it has an easily accessible return port which can be easily adapted to different installation situations.
- the fuel return connection comprises a socket part which is fastened in a fuel return opening in the housing in a fuel-tight manner and on which the plug part is placed in a fuel-tight manner.
- the fuel injection device comprises a two-part return connection, which consists of there is a socket part and a plug part.
- a separate socket part makes it possible to design the return connection according to the individual installation conditions of the respective internal combustion engine without having to make any changes to the fuel injection device as a whole. This creates space for example for the arrangement of the high-pressure fuel connection at the protruding end of the fuel injection device.
- the socket part it is also possible to facilitate the assembly and disassembly of the return connection and thus to improve the operational safety of the fuel injection device.
- the socket part and the plug part are each a plastic injection molded part.
- Such parts are extremely inexpensive and easy to manufacture even with complex geometry.
- the fuel return opening can be arranged laterally in the housing, and the socket part can have a device-side and a connector-side section, the longitudinal axes of which are at an angle, preferably approximately 90 °, to one another, such that the longitudinal axis of the connector-side section is substantially parallel to Longitudinal axis of the housing of the fuel injector extends.
- the plug part advantageously has at least one connecting piece for connecting a fuel return hose.
- two connecting pieces can also be provided for connecting two fuel return hoses.
- the plug part can be connected to a return ring line.
- the plug part is secured to the socket part via a snap-in connection.
- the plug part can have at least one latching arm which cooperates with at least one latching lug on the socket part.
- the latching arm have an actuating section through which it can be actuated by hand in such a way that it is released from the latching lug.
- the locking lug has a different color at least than the locking arm and the locking arm is arranged so that the locking lug is visible from the outside in the locked state.
- socket part In another development, a simple attachment of the socket part to the housing of the fuel injection device is specified.
- the socket part is then permanently attached to the fuel return opening in the housing by injection molding with plastic.
- the socket part In order to prevent liquid plastic from contaminating the plug-side area of the socket part during the injection process and thereby complicating the later assembly of the fuel return connection, it is proposed that the socket part have a collar that is essentially orthogonal to the plug-side section and that runs around the plug-side section. During the injection process, the injection mold can seal the socket part on this collar.
- connection device If the fuel injector is operated electrically, an electrical connection device must be provided at some point. In this case, it is advantageous if the socket part and the electrical Connection device are attached to the housing by the same extrusion coating. Both connection devices are thus encapsulated in the same molding compound and securely held on the housing of the fuel injection device.
- Fig. 2 is a side view of the socket part of Fig. 1;
- FIG. 3 shows a plan view of the socket part from FIG. 1;
- Fig. 4 a front view of the socket part of Fig. 1;
- Fig. 5 a section along the line V-V of Fig. 3;
- Fig. 6 is a bottom view of the connector part of Fig. 1;
- Fig. 7 a side view of the plug part of Fig. 1;
- Fig. 8 a plan view of the plug part of Fig. 1;
- FIG. 9 a section along the line VIV-VIV of FIG. 7 through the plug part of FIG. 1;
- Fig. 10 a partial longitudinal section through a second
- Embodiment of a fuel injection device is a perspective view of a third embodiment of a fuel injection device;
- FIG. 12 shows a perspective illustration of the plug and the socket of the fuel injection device from FIG. 11 in the assembled state
- FIG. 13 a representation similar to FIG. 12 in the disassembled state.
- a first exemplary embodiment of a fuel injection device bears the reference number 10 overall.
- the fuel injection device 10 shown is a common rail injector. This serves to inject the fuel directly into the combustion chamber of the internal combustion engine in an internal combustion engine.
- the internal combustion engine and the combustion chamber are not shown in FIG. 1.
- the injector 10 comprises a housing 12 which is attached to the cylinder head of the internal combustion engine at its lower end (not shown in FIG. 1). At the end of the injector 10 which protrudes from the cylinder head of the internal combustion engine and is visible in FIG. 1, there is a high-pressure fuel connection (not visible). Furthermore, an electrical connection 14 is provided there, via which the injector 10 can be connected to an engine control (not shown).
- a fuel return connection 16 on the side, which consists of a socket part 18 and a plug part 20.
- the socket part 18 is in a return opening 22 in the housing 12- of the injector 10 inserted.
- the longitudinal axis of the return opening 22 extends in the present exemplary embodiment in a radial direction, that is to say perpendicular to the longitudinal axis of the housing 12 of the injector 10 (in an exemplary embodiment not shown, there may also be an offset between the longitudinal axis of the housing and the longitudinal axis of the return opening).
- the fuel is led away from the injector 10 via the return opening 22, which fuel was supplied to it via the high-pressure fuel connection, but was not injected into the combustion chamber of the internal combustion engine.
- the socket part 18 comprises a section 24 on the device side and a section 26 on the plug side.
- the section 24 on the device side is essentially cylindrical and has a circumferential groove 28 at its protruding end, somewhat spaced from it.
- a groove 28 in FIG. 2 is in the groove 28 - 5 O-ring not shown inserted. This O-ring seals the device-side section 24 of the socket part 18 in the installation position shown in FIG. 1 with respect to the return opening 22.
- a flow channel 30 runs in the interior of the device-side section 24 (cf. FIG. 5).
- the plug-side section 26 is molded onto the end of the device-side section 24 which projects from the housing 12 in the installed position. It comprises a likewise substantially cylindrical channel housing 32, the longitudinal axis of which extends at a right angle to the longitudinal axis of the section 24 on the device side. The longitudinal axis of the plug-side section 26 is thus essentially parallel to the longitudinal axis of the housing 12 of the injector 10.
- a flow channel 34 runs inside the channel housing 32 and is fluidly connected to the flow channel 30 in the device-side section 24 of the socket part 18.
- a circumferential groove 36 is also formed in the plug-side section 26, into which an O-ring (not shown in FIGS. 2 -5) is inserted. This O-ring provides the seal between the socket part 18 and the plug part 20 in the installed position.
- a guide ring 40 is integrally formed on the channel housing 32 via four spacers 38 projecting approximately radially from the channel housing 32.
- the central axis of the guide ring 40 and the central axis of the channel housing 32 are aligned.
- the guide ring 40 has an approximately quadrangular cross section with strongly rounded corners. The rounding of the diagonally opposite corners is the same in each case, the adjacent roundings differ.
- the guide ring 40 extends axially to a height just before the groove 36.
- a narrow guide slot 42 is made in the guide ring 40.
- the guide slot 42 runs from the plug-side edge 44 of the guide ring 40 over approximately one third of the longitudinal extent of the guide ring 40.
- a circumferential collar 46 is formed on the guide ring 40 ,
- a detent 48 is formed on diametrically opposite areas of the guide ring 40.
- the locking lugs 48 are colored bright green, whereas the other parts of the socket part 18 are gray-black.
- the plug part 20 comprises an approximately cylindrical base section 50.
- a radially projecting connecting piece 52 is formed on this at the upper end.
- a flow channel 54 runs in the interior of the base section 50 (FIG. 9).
- a fastening plate 56 is molded onto the upper region of the base section 50.
- the plane of the mounting plate 56 is orthogonal to the longitudinal axis of the base section 50.
- the mounting plate 56 has an overall elliptical shape. In the area of the larger semiaxes of the mounting plate 56 there are recesses 58.
- latching arms 60 are also provided, which extend parallel to the longitudinal axis of the base section 50.
- the section of the latching arms 60 lying at the level of the connecting piece 52 is designed as an actuating section 62.
- the section of the latching arms 60 located at the lower region of the base section 50 in FIGS. 7 and 9 carries at its projecting end a latching hook 64 directed towards the base section 50.
- the latching hook 64 is colored bright red, whereas all other parts of the Plug part 20 are kept gray-black.
- Guide aprons 66 extend downward from the side regions of the fastening plate 56 below the smaller semiaxes parallel to the base section 50.
- a web-shaped projection 68 is formed between one of the two guide aprons 66 and the base section 50.
- the injector 10 is assembled as follows:
- the electrical connection 14 is placed on top of the housing 12. Then the socket part 18 with the device-side section 24 is inserted into the return opening 22. This is done so that the connector side Section 26 of the socket part 18 extends parallel to the longitudinal axis of the housing 12 of the injector 10 in FIG. 1 upwards.
- the electrical connection 14 and the socket part 18 are now encapsulated with plastic compound 70 in an injection mold.
- the injection mold is sealed to the outside by the collar 46, among other things.
- the plastic part 70 has the socket part 18 securely attached to the housing 12.
- the fuel return port 16 is established. This takes place first by plugging the plug part 20 onto the socket part 18.
- the plug part 20 is plugged onto the socket part 18 in the axial direction, as indicated by the arrow 72.
- the user holds the plug part on the actuating sections 62 for plugging on.
- the user guides the plug part 20 such that the projection 68 between the guide aprons 66 and the base section 50 of the plug part engages in the guide slot 42 in the plug-side section 26 of the socket part 18.
- the projection 68 and the guide slot 42 thus ensure that the plug part 20 is fastened in a defined angular position relative to the socket part 18.
- the guide aprons 66 slide over the guide ring 40. Because of the geometric shape of the guide ring 40 with the differently rounded corners and the guide aprons 66, this also defines a clear angular position of the plug part 20 relative to the socket part 18. Furthermore, the connector part 20 is centered relative to the socket part 18 during the pushing-on process by the guide aprons 66 and the guide ring 40.
- the latching hooks 64 slide during the pushing open process the locking arms 60 of the plug part 20 via the locking lugs 48 on the socket part 18. From the user's perspective, only the red locking hooks 64 are initially visible. As a result, the latching hooks 64 on the latching arms 60 are pressed elastically radially outward. At the end of the pushing-on process, the latching hooks 64 snap radially inward at the ends of the latching arms 60 and lie with an axial holding surface (not shown) on the corresponding latching lugs 48 on the socket part 18. In this way, the plug part 20 is securely attached to the socket part 18. From the user's point of view, the red locking hooks 64 are now covered by the green locking lugs 48. This gives the user visual feedback about the connection that has been established.
- the user presses the actuating sections 62 of the latching arms 60 radially inwards.
- the latching hooks 64 are moved radially outward, as a result of which they are released from the latching lugs 48. The user can thus pull the plug part 20 off the socket part 18 again.
- a leakage hose (not shown) is then pushed onto the connecting piece 52. Excess fuel can be returned via this.
- FIG. 10 shows a second exemplary embodiment of an injector 10.
- Parts and elements which have functions equivalent to parts and elements of the exemplary embodiment described above have the same reference numerals. They are not explained in detail again.
- the injector 10 shown in FIG. 10 has a plug part 20 which has two on the base section 50 Includes diametrically away connecting pieces 52a and 52b. In this way it is possible to connect the injector 10 to an annular leakage line (not shown).
- FIGS. 11-13 A third exemplary embodiment of a fuel injection device 10 is shown in FIGS. 11-13. Parts and elements which have functions equivalent to parts and elements of the exemplary embodiments described above have the same reference symbols. They are not explained in detail again.
- this locking arm 60 is also not made in one piece with the plug part 20, but consists of a separate sheet metal part which is clipped into the plug part 20.
- a plurality of holding plates 74 are integrally formed on the projecting end of the plug part 20, which also serve to protect the connecting piece 52.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10115322 | 2001-03-28 | ||
DE10115322A DE10115322A1 (de) | 2001-03-28 | 2001-03-28 | Kraftstoff-Einspritzvorrichtung für Brennkraftmaschinen, insbesondere Common-Rail-Injektor |
PCT/DE2002/001093 WO2002077438A1 (de) | 2001-03-28 | 2002-03-26 | Kraftstoff-einspritzvorrichtung für brennkraftmaschinen, insbesondere common-rail-injektor, mit einem rücklaufanschluss |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1373709A1 true EP1373709A1 (de) | 2004-01-02 |
EP1373709B1 EP1373709B1 (de) | 2005-12-28 |
Family
ID=7679405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02732353A Expired - Lifetime EP1373709B1 (de) | 2001-03-28 | 2002-03-26 | Kraftstoff-einspritzvorrichtung für brennkraftmaschinen, insbesondere common-rail-injektor, mit einem rücklaufanschluss |
Country Status (5)
Country | Link |
---|---|
US (1) | US6892706B2 (de) |
EP (1) | EP1373709B1 (de) |
JP (1) | JP4099397B2 (de) |
DE (2) | DE10115322A1 (de) |
WO (1) | WO2002077438A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012211836A1 (de) | 2012-07-06 | 2014-01-09 | Robert Bosch Gmbh | Ein Kraftstoffeinspritzventil von effektiver Dichtheit |
CN107836064A (zh) * | 2015-06-22 | 2018-03-23 | 罗伯特·博世有限公司 | 具有改进的通过注塑成型的可制造性的插头 |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10206908B4 (de) * | 2002-02-19 | 2010-01-07 | Continental Automotive Gmbh | Injektor mit verbesserter Anschlussgeometrie |
DE10215980B4 (de) * | 2002-04-11 | 2008-03-27 | Siemens Ag | Leckageanschluss für einen Kraftstoffinjektor |
DE202005015966U1 (de) † | 2005-10-10 | 2007-02-15 | Voss Automotive Gmbh | Steckverbinder für Medienleitungen |
US7415968B1 (en) * | 2007-04-24 | 2008-08-26 | Lycoming Engines, A Division Of Avco Corporation | Modular fuel delivery assembly for an aircraft engine |
DE102007022116B4 (de) | 2007-05-11 | 2024-05-08 | Andreas Stihl Ag & Co. Kg | Handgeführtes Arbeitsgerät |
JP4692663B2 (ja) * | 2009-03-31 | 2011-06-01 | 株式会社デンソー | コネクタ |
JP2010236642A (ja) * | 2009-03-31 | 2010-10-21 | Denso Corp | コネクタ |
DE102009002128A1 (de) * | 2009-04-02 | 2010-10-14 | Robert Bosch Gmbh | Kraftstoffeinspritzvorrichtung |
DE102011002697A1 (de) * | 2011-01-14 | 2012-07-19 | Robert Bosch Gmbh | Pumpe, insbesondere für ein Kraftstoffeinspritzsystem einer Brennkraftmaschine |
EP3203047B1 (de) * | 2012-02-28 | 2018-10-17 | Norma U.S. Holding LLC | Sensorhalter und anordnung für selektives katalytisches reduktionssystem eines fahrzeuges |
DE102012206681A1 (de) | 2012-04-24 | 2013-10-24 | Robert Bosch Gmbh | Anschlussvorrichtung |
US9689515B2 (en) * | 2013-11-06 | 2017-06-27 | Nifco Korea Inc. | Quick connector apparatus |
GB201519788D0 (en) * | 2015-11-10 | 2015-12-23 | Delphi Internat Operations Luxembourg S À R L | Interface assembly |
JP2017106322A (ja) * | 2015-12-07 | 2017-06-15 | スズキ株式会社 | エンジンの燃料供給装置 |
GB2547010B (en) * | 2016-02-04 | 2019-11-13 | Delphi Tech Ip Ltd | Fuel injectors |
EP4112914A1 (de) * | 2021-06-29 | 2023-01-04 | Volvo Truck Corporation | Kraftstoffleitungsverbindungsanordnung für ein fahrzeug |
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US4300509A (en) * | 1980-10-06 | 1981-11-17 | Ford Motor Company | Fuel injection and control systems |
US4510909A (en) * | 1984-04-05 | 1985-04-16 | General Motors Corporation | Fuel rail assembly |
CH668621A5 (de) * | 1986-01-22 | 1989-01-13 | Dereco Dieselmotoren Forschung | Kraftstoffeinspritzanlage fuer eine brennkraftmaschine. |
US4790055A (en) * | 1987-06-15 | 1988-12-13 | Stanadyne, Inc. | Method of assembling a fuel nozzle assembly |
US5000614A (en) * | 1989-05-05 | 1991-03-19 | Huron Products Corporation | Conduit quick connector assembly having a ramped housing with a hair pin retainer |
US4991557A (en) * | 1989-08-21 | 1991-02-12 | Siemens-Bendix Automotive Electronics L.P. | Self-attaching electromagnetic fuel injector |
CA2050452A1 (en) * | 1990-11-19 | 1992-05-20 | John C. Hickey | Integrally formed fuel rail/injectors and method for producing |
US5092300A (en) * | 1991-01-31 | 1992-03-03 | Siemens Automotive L.P. | Plastic fuel rail end joint |
US5239964A (en) * | 1992-05-11 | 1993-08-31 | Illinois Tool Works Inc. | Concentric fuel line system |
FR2721088B1 (fr) * | 1994-06-10 | 1997-09-12 | Bosch Gmbh Robert | Raccord de conduites de carburant comportant un ajutage et un dispositif de son blocage axial dans le perçage de branchement. |
JP3755143B2 (ja) * | 1996-11-21 | 2006-03-15 | 株式会社デンソー | 蓄圧式燃料噴射装置 |
US5735555A (en) * | 1996-12-18 | 1998-04-07 | Siemens Automotive Corporation | Fuel rail to fuel tube end compact connector |
DE19713446A1 (de) * | 1997-04-01 | 1998-10-08 | Bosch Gmbh Robert | Kupplung für Kraftstoffleitungen oder dergleichen |
IT1292771B1 (it) * | 1997-06-16 | 1999-02-11 | Elasis Sistema Ricerca Fiat | Dispositivo di collegamento rapido di un connettore di riflusso con un iniettore di combustibile per motori a combustione interna |
IT1295462B1 (it) * | 1997-10-02 | 1999-05-12 | Elasis Sistema Ricerca Fiat | Iniettore di combustibile a comando elettromagnetico per motori a combustione interna. |
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DE19942990A1 (de) * | 1999-09-09 | 2001-03-22 | Bosch Gmbh Robert | Common-Rail-Injektor |
-
2001
- 2001-03-28 DE DE10115322A patent/DE10115322A1/de not_active Ceased
-
2002
- 2002-03-26 JP JP2002575460A patent/JP4099397B2/ja not_active Expired - Fee Related
- 2002-03-26 EP EP02732353A patent/EP1373709B1/de not_active Expired - Lifetime
- 2002-03-26 US US10/296,152 patent/US6892706B2/en not_active Expired - Fee Related
- 2002-03-26 WO PCT/DE2002/001093 patent/WO2002077438A1/de active IP Right Grant
- 2002-03-26 DE DE50205443T patent/DE50205443D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
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See references of WO02077438A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012211836A1 (de) | 2012-07-06 | 2014-01-09 | Robert Bosch Gmbh | Ein Kraftstoffeinspritzventil von effektiver Dichtheit |
CN107836064A (zh) * | 2015-06-22 | 2018-03-23 | 罗伯特·博世有限公司 | 具有改进的通过注塑成型的可制造性的插头 |
CN107836064B (zh) * | 2015-06-22 | 2019-11-15 | 罗伯特·博世有限公司 | 具有改进的通过注塑成型的可制造性的插头 |
Also Published As
Publication number | Publication date |
---|---|
US6892706B2 (en) | 2005-05-17 |
US20040020466A1 (en) | 2004-02-05 |
DE50205443D1 (de) | 2006-02-02 |
JP4099397B2 (ja) | 2008-06-11 |
JP2004518886A (ja) | 2004-06-24 |
DE10115322A1 (de) | 2002-10-17 |
WO2002077438A1 (de) | 2002-10-03 |
EP1373709B1 (de) | 2005-12-28 |
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