EP4605643A1 - Kraftstoffinjektoranordnung zur montage eines kraftstoffinjektors in einer brennkraftmaschine - Google Patents
Kraftstoffinjektoranordnung zur montage eines kraftstoffinjektors in einer brennkraftmaschineInfo
- Publication number
- EP4605643A1 EP4605643A1 EP23769229.8A EP23769229A EP4605643A1 EP 4605643 A1 EP4605643 A1 EP 4605643A1 EP 23769229 A EP23769229 A EP 23769229A EP 4605643 A1 EP4605643 A1 EP 4605643A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injector
- fuel
- injector
- jacket tube
- arrangement according
- 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.)
- Withdrawn
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of 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
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/85—Mounting of fuel injection apparatus
- F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws
Definitions
- the invention relates to a fuel injector arrangement for mounting a fuel injector in an internal combustion engine, wherein the fuel injector is preferably used to meter liquid or gaseous fuel into a combustion chamber of an internal combustion engine.
- the fuel which can be gaseous or liquid, is introduced directly into the combustion chamber of the internal combustion engine.
- the fuel is introduced into the combustion chamber at high pressure at the right time using a fuel injector, which is usually located in the cylinder head of the internal combustion engine.
- the fuel-air mixture is then either externally ignited, usually with the help of a spark plug, or it is ignited according to the principle of a diesel engine solely by compressing the combustion chamber air (auto-ignition). Since the fuel injector protrudes into the combustion chamber, it is exposed to the pressure in the combustion chamber. Installation in the cylinder head must therefore meet the following requirements: Firstly, the fuel injector must withstand the pressure created by combustion and the corresponding temperatures in the combustion chamber.
- clamping device which exerts a clamping force on the fuel injector and presses it against a support surface in the internal combustion engine.
- the clamping device exerts the clamping force at least indirectly on the jacket tube, the jacket tube being supported on a pressure surface on the injector body with an end surface facing the injection opening.
- the clamping force is exerted by the clamping device on the end of the casing pipe facing away from the pressure surface. This is easily accessible so that the already known clamping devices or clamping devices can be used.
- the pressure surface is formed on a union nut which is screwed into an external thread formed on the injector body. This creates a pressure surface on the injector body in a simple manner.
- the union nut can be placed at any point on the injector body by providing an external thread.
- the sleeve exerts an inwardly directed force on the end surface of the jacket tube and thereby prevents - or at least reduces - a relative movement of the injector in the jacket tube.
- the end surface of the sleeve which interacts with the end surface of the jacket tube is spherical or conical, so that the inwardly directed force on the end surface of the jacket tube is increased.
- the drawing shows various embodiments of the fuel injector arrangement according to the invention. It shows the
- Fig. 2 is an enlargement of the section marked II in Fig. 1,
- Fig. 3 shows another embodiment in the same representation as Fig. 2, as well as the
- Fig. 9 a plan view of the top of the fuel injector with a clamping claw
- the fuel injector 1 has a housing 5 which comprises an injector body 6 and a jacket tube 10, the jacket tube 10 surrounding the injector body 6 over a large part of its length.
- a fuel inlet 8 is formed on the injector body 6, which is connected to a fuel line 7, via which gaseous or liquid fuel can be supplied to the fuel injector 1.
- the fuel introduced via the fuel inlet flows from the fuel inlet 8 through transverse bores 19 into an annular space 13, which is formed between the jacket tube 10 and the injector body 6, and through the annular space 13 in the direction of the injection opening 9.
- the fuel flows from the annular space 13 back into the injector body 6 via second transverse bores 22 and reaches a nozzle body 36 via fuel channels formed within the injector body 6 and not shown in the drawing, which is part of the injector body 6 and in which the at least one injection opening 9 is formed.
- a movable valve element (not shown in the drawing) is arranged in the nozzle body 36, which opens the injection opening 9 at the desired time so that the fuel can be delivered in a metered manner.
- the jacket tube 10 rests at its end region facing the injection opening 9 with an end surface 18 on a pressure surface 16 of the injector body 6, as shown in Fig. 2 in an enlargement of the section of the Fig. 1.
- the seal between the jacket tube 10 and the injector body 2 is ensured by a sealing ring 25, which prevents fuel from escaping.
- a seal 15 in the form of a sealing ring is arranged, which ensures the seal between the jacket tube 10 and the injector body 6 at this point, so that the annular space 13 is sealed to the outside.
- a clamping force is applied to the end surface 14 of the casing tube 10 using a clamping device 30, which in the embodiment shown here has the form of a clamping claw.
- a clamping device 30 which in the embodiment shown here has the form of a clamping claw.
- This is fork-shaped and surrounds the injector body 6, with the clamping surface 31 formed on the clamping claw 30 resting on the end surface 14 of the casing tube 10.
- the clamping claw 30 is clamped by a clamping screw 32, which engages in a screw hole 33 in the cylinder head.
- a yoke-shaped clamping claw is also possible, which is clamped on both sides with a clamping screw in the cylinder head.
- Fig. 3 shows a further alternative design of the end of the jacket tube 10 on the combustion chamber side.
- the jacket tube 10 here has a conical end surface 18 which rests against a clamping ring 20 which forms the pressure surface 16.
- the clamping ring 20 is arranged in an annular groove 21 in the injector body 6 or nozzle body 36.
- a sealing ring 25 is also arranged between the end region of the jacket tube 10 and the injector body 6.
- Fig. 4 shows a further embodiment in the same representation as Fig. 3.
- the pressure surface 16 is arranged here on a union nut 23, which is screwed into an external thread 27 on the nozzle body 36.
- Fig. 5 shows a further embodiment in the same representation as Fig. 4.
- the pressure surface 16 is formed here on an outwardly projecting shoulder of the nozzle body 36, with the jacket tube 10 resting with its end surface 18 on this pressure surface 16. Since the shoulder projects radially outwards relatively far, the jacket tube 10 in this embodiment can be designed as a simple cylindrical tube that can be pushed over the injector body 6 from the inlet end of the fuel injector 1. In the embodiments in which the jacket tube 10 has a larger diameter at the inlet end of the fuel injector 1 than at the opposite end, the jacket tube is pushed over the fuel injector 1 from the side of the injection opening 9, wherein the pressure surface 16 must be subsequently formed or mounted, for example with the aid of a clamping ring 20 (see Fig. 3) or also by means of a shoulder 17 which is subsequently attached to the injector body 6 - for example by means of a welded connection.
- Fig. 6 shows a further embodiment of the jacket tube 10.
- the jacket tube 10 here consists of a first partial jacket tube 110 and a second partial jacket tube 210.
- the second jacket tube 210 is screwed into an external thread 27' on the injector body 6 and the gap between the second partial jacket tube 210 and the injector body 6 is sealed by a sealing ring 25.
- the first partial jacket tube 110 which is designed here as a straight cylinder, is then pushed on from the end of the injector body 6 facing away from the combustion chamber and sealed to the second partial jacket tube 210.
- the two partial jacket tubes 110, 210 lie against one another, with the seal being provided by an intermediate seal 26 in the form of a sealing ring This allows the first partial casing pipe 110 to be pushed on as a straight circular cylinder from the side of the fuel inlet, which facilitates assembly within the cylinder head.
- Fig. 9 shows a clamping device 30 in the form of a clamping claw, as in Fig. 1, wherein a plan view of the upper part of the fuel injector 1, i.e. the part facing away from the combustion chamber, is shown here.
- the clamping claw 30 is fork-shaped and surrounds the injector body 6 so that a clamping force can be exerted on the jacket tube 10 or on the sleeve 28, if one is provided.
- the clamping claw 30 is clamped via a clamping screw 32, which engages in a corresponding thread in the cylinder head, and thus transfers the clamping force to the fuel injector 1.
- Fig. 10 shows another illustration of the clamping claw 30 in a perspective view.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022211054.4A DE102022211054A1 (de) | 2022-10-19 | 2022-10-19 | Kraftstoffinjektoranordnung zur Montage eines Kraftstoffinjektors in einer Brennkraftmaschine |
| PCT/EP2023/075174 WO2024083411A1 (de) | 2022-10-19 | 2023-09-13 | Kraftstoffinjektoranordnung zur montage eines kraftstoffinjektors in einer brennkraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4605643A1 true EP4605643A1 (de) | 2025-08-27 |
Family
ID=88060536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23769229.8A Withdrawn EP4605643A1 (de) | 2022-10-19 | 2023-09-13 | Kraftstoffinjektoranordnung zur montage eines kraftstoffinjektors in einer brennkraftmaschine |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP4605643A1 (de) |
| JP (1) | JP2025533887A (de) |
| KR (1) | KR20250088761A (de) |
| CN (1) | CN120077199A (de) |
| DE (1) | DE102022211054A1 (de) |
| WO (1) | WO2024083411A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03182680A (ja) * | 1989-12-08 | 1991-08-08 | Nissan Motor Co Ltd | 燃料噴射ノズルの固定構造 |
| DE19511703A1 (de) * | 1995-03-30 | 1996-10-02 | Bayerische Motoren Werke Ag | Vorrichtung zur Befestigung einer Einspritzdüse insbesondere am Zylinderkopf einer Brennkraftmaschine |
| DE19853090A1 (de) | 1998-11-18 | 2000-05-25 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
| US6314943B1 (en) | 1999-10-22 | 2001-11-13 | Ford Global Technologies, Inc. | Fuel supply rail with integrated fuel injector load spring |
| DE10155678A1 (de) | 2001-11-13 | 2003-05-22 | Bosch Gmbh Robert | Einspannvorrichtung für ein Kraftstoffeinspritzventil |
| DE10304392A1 (de) * | 2002-09-30 | 2004-04-08 | Fev Motorentechnik Gmbh | Zylinderkopf für eine direkteinspritzende Brennkraftmaschine |
| DE10340911B4 (de) | 2003-09-05 | 2014-12-04 | Robert Bosch Gmbh | Spannhülse mit Temperaturkompensation |
| EP2187040B1 (de) * | 2005-03-03 | 2013-01-09 | Robert Bosch GmbH | Brennstoffeinspritzvorrichtung |
| DE102020004625A1 (de) | 2020-07-30 | 2022-02-03 | Deutz Aktiengesellschaft | lnjektorverpratzung |
-
2022
- 2022-10-19 DE DE102022211054.4A patent/DE102022211054A1/de active Pending
-
2023
- 2023-09-13 KR KR1020257016110A patent/KR20250088761A/ko active Pending
- 2023-09-13 WO PCT/EP2023/075174 patent/WO2024083411A1/de not_active Ceased
- 2023-09-13 EP EP23769229.8A patent/EP4605643A1/de not_active Withdrawn
- 2023-09-13 CN CN202380073840.8A patent/CN120077199A/zh active Pending
- 2023-09-13 JP JP2025519938A patent/JP2025533887A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20250088761A (ko) | 2025-06-17 |
| JP2025533887A (ja) | 2025-10-09 |
| CN120077199A (zh) | 2025-05-30 |
| WO2024083411A1 (de) | 2024-04-25 |
| DE102022211054A1 (de) | 2024-04-25 |
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