EP2363593A1 - Dispositif de couplage - Google Patents
Dispositif de couplage Download PDFInfo
- Publication number
- EP2363593A1 EP2363593A1 EP10002236A EP10002236A EP2363593A1 EP 2363593 A1 EP2363593 A1 EP 2363593A1 EP 10002236 A EP10002236 A EP 10002236A EP 10002236 A EP10002236 A EP 10002236A EP 2363593 A1 EP2363593 A1 EP 2363593A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder head
- fuel injector
- coupling device
- fuel
- injector cup
- 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
- 230000008878 coupling Effects 0.000 title claims abstract description 42
- 238000010168 coupling process Methods 0.000 title claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 42
- 239000000446 fuel Substances 0.000 claims abstract description 91
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002828 fuel tank Substances 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
- 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
- F02M55/025—Common 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
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9015—Elastomeric or plastic materials
Definitions
- the invention relates to a coupling device for hydraulically and mechanically coupling a fuel rail to a cylinder head of a combustion engine.
- Coupling devices for hydraulically and mechanically coupling a fuel rail to a cylinder head of a combustion engine are in widespread use, in particular for internal combustion engines.
- Fuel can be supplied to an internal combustion engine by the fuel rail through a fuel injector.
- the fuel rail can be coupled to the cylinder head in different manners.
- a fuel accumulator to which the fuel injectors are connected and which has a relatively large volume.
- a fuel accumulator is often referred to as a common rail.
- Known fuel rails comprise a hollow body with recesses in form of fuel injector cups, wherein the fuel injectors are arranged.
- the object of the invention is to create a coupling device for hydraulically and mechanically coupling a fuel rail to a cylinder head of a combustion engine which is simply to be manufactured and which facilitates a reliable and precise coupling between the fuel rail and the cylinder head.
- the invention is distinguished by a coupling device for mechanically coupling a fuel rail to a cylinder head of a combustion engine.
- the coupling device comprises a fuel injector cup being designed to be hydraulically and mechanically coupled to the fuel rail and comprising a through hole extending between a first surface and a second surface of the fuel injector cup, the second surface opposing the first surface and being arranged and designed to face the cylinder head, and a fastening element being designed to be fixedly coupled to the cylinder head.
- the fastening element comprises a head portion and a shank portion. The head portion faces the first surface of the fuel injector cup.
- the shank portion is partially arranged in the through hole and is designed to be in engagement with the cylinder head.
- the coupling device comprises a first spring element which is arranged axially between the head portion and the first surface of the fuel injector cup, and a second spring element which faces the second surface of the fuel injector cup and is arrangeable axially between the second surface of the fuel injector cup and the cylinder head.
- At least one of the spring elements consists of a rubber or comprises a rubber.
- the coupling of the fuel injector cup with the cylinder head allows an assembly of the cylinder head and the fuel rail without a direct contact between the cylinder head and the fuel injector cup.
- the spring elements consists of a rubber or comprises a rubber, a noise transmission between the cylinder head and the fuel rail can be kept very small. Additionally, the rubber may be selected in view of the desired stiffness of the spring elements in a simple manner so that a favorable dynamic behavior of the fuel rail relative to the cylinder head may be obtained.
- a distance element is arranged axially between the first spring element and the second spring element.
- the distance element is shaped as a sleeve and is at least partially arranged inside the through hole.
- the shank portion is at least partially arranged inside the distance element.
- the distance element comprises at least one collar being arranged axially between the head portion and the first spring element and/or is arrangeable axially between the second spring element and the cylinder head. Due to the at least one collar a preset deformation of the spring element may be obtained.
- the distance element comprises two collars.
- the first collar is arranged axially between the head portion and the first spring element and the second collar is arrangeable axially between the second spring element and the cylinder head. This can make it very easy to mount the fuel injector cup to the cylinder head on the production line.
- At least one retaining element is arranged inside the distance element and is in engagement with the shank portion.
- the fastening element may be arranged in any desired position relative to the distance element. Consequently, an easy tightening of the fastening element may be obtained.
- a first subassembly consisting of the fastening element, the first spring element, the distance element and one of the retaining elements can be obtained which be joined with the second spring element and which enables an easy construction of the coupling device. Consequently, this arrangement can make it very easy to mount the fuel injector cup to the cylinder head.
- the at least one retaining element consists of a plastic or comprises a plastic. This has the advantage that the retaining element can be in secure engagement with the shank portion.
- the fastening element is a screw.
- a fuel feed device 10 is assigned to an internal combustion engine 22 ( Figure 1 ) which can be a diesel engine or a gasoline engine. It includes a fuel tank 12 that is hydraulically connected with a fuel pump 14. The output of the fuel pump 14 is connected to a fuel inlet 16 of a fuel rail 18. In the fuel rail 18, the fuel is stored for example under a pressure of about 200 bar in the case of a gasoline engine or of about 2,000 bar in the case of a diesel engine. Fuel injectors 20 are connected to the fuel rail 18 and the fuel is fed to the fuel injectors 20 via the fuel rail 18. The fuel injectors 20 are arranged in a cylinder head 70 of the internal combustion engine 22. Preferably, the fuel injectors 20 are not in direct contact with the cylinder head 70.
- FIG 2 shows a part of the fuel injector 20.
- the fuel injector 20 has a fuel injector body 24.
- the fuel injector 20 is suitable for injecting fuel into a combustion chamber 25 of the internal combustion engine 22 ( Figure 1 ).
- the fuel injector 20 comprises a fuel inlet portion 26.
- a cavity 28 is arranged in the fuel injector body 24. In an injection mode fuel can flow from the fuel inlet portion 26 to the cavity 28 and can be subsequently injected into the combustion chamber 25. In a non-injecting mode an injection of fuel into the combustion chamber 25 is prevented.
- the fuel feed device 10 comprises a fuel injector cup 30 which is part of a coupling device 40.
- the fuel injector cup 30 is mechanically and hydraulically coupled to the fuel rail 18.
- the fuel injector cup 30 is in engagement with the fuel inlet portion 26 of the fuel injector 20.
- the fuel injector cup 30 has a through hole 42 with a central longitudinal axis L.
- the through hole 42 extends between a first surface 44 and a second surface 46 of the fuel injector cup 30.
- the first surface 44 is forming an outer surface of the fuel injector cup 30.
- the second surface 46 opposes the first surface 44 and faces the cylinder head 70.
- the coupling device 40 further comprises a fastening element 48.
- the fastening element 48 has a head portion 50 and a shank portion 52.
- the head portion 50 has a larger radial extension than the shank portion 52.
- the head portion 50 faces the first surface 44 of the fuel injector cup 30.
- the fastening element 48 is a screw with an outer thread 54.
- the shank portion 52 is extending through the through hole 42.
- the shank portion 52 can be in engagement with the cylinder head 70. If the fastening element 48 is a screw, the outer thread 54 is in engagement with an inner thread which is arranged in the cylinder head 70. By this the fastening element 48 can be fixedly coupled to the cylinder head 70.
- the coupling device 40 further comprises a first spring element 56 and a second spring element 58.
- the spring elements 56, 58 consist of a rubber or comprise a rubber. Depending on the axial extension and the shape of the spring elements 56, 58 and the type of rubber used for the spring elements 56, 58 a desired stiffness of the spring elements 56, 58 can be selected.
- the first spring element 56 is arranged axially between the head portion 50 and the first surface 44 of the fuel injector cup 30.
- the second spring element 58 faces the second surface 46 of the fuel injector cup 30.
- the second spring element 58 is arranged axially between the second surface 46 of the fuel injector cup 30 and the cylinder head 70.
- the coupling device 40 comprises a distance element 60 which has the shape of a sleeve.
- the distance element 60 is arranged axially between the first spring element 56 and the second spring element 58.
- the distance element 60 enables to maintain a desired distance between the first spring element 56 and the second spring element 58.
- the distance is selected in a way that the deformation of the spring elements 56, 58 is in a desired range.
- the distance element 60 is arranged inside the through hole 42.
- the shank portion 52 is arranged inside the distance element 60.
- the distance element 60 comprises one collar 62a ( Figures 2 and 5 ).
- the collar 62a is arranged axially between the head portion 50 and the first spring element 56 ( Figure 2 ) or between the second spring element 58 and the cylinder head 70 ( Figure 5 ).
- the collar 62a enables to obtain a preset deformation of the spring elements 56, 58.
- the collar 62a which is arranged between the second spring element 58 and the cylinder head 70 can have a larger contact area than the second spring element 58 so that the pressure between the coupling device 40 and the cylinder head 70 can be very low. Therefore, an imprinting into the cylinder head 70 can be avoided.
- the distance element 60 comprises two collars 62a, 62b ( Figure 4 ).
- the distance element 60 has two parts, un upper part 60a and a lower part 60b, which are separated from each other.
- the upper part 60a of the distance element 60 comprises a first of the collars 62a
- the lower part 60b of the distance element 60 comprises a second of the collars 62b.
- the first collar 62a is arranged axially between the head portion 50 and the first spring element 56.
- the second collar 62b is arranged axially between the second spring element 58 and the cylinder head 70. This can make it very easy to mount the fuel injector cup 30 to the cylinder head 70 on the production line.
- the coupling device 40 further comprises at least one retaining element 64, 66.
- the coupling device 40 comprises a first retaining element 64 and a second retaining element 66.
- the retaining elements 64, 66 are arranged inside the distance element 60 and are in engagement with the shank portion 52.
- the retaining elements 64, 66 consist of a plastic or comprise a plastic.
- the retaining elements 64, 66 enable to arrange the fastening element 48 in a position relative to the distance element 60 which allows an easy tightening of the fastening element 48.
- the fastening element 48, the first spring element 56, the distance element 60 and the first retaining element 64 are composed in a manner that they form a first subassembly 80.
- the second spring element 58 can be mounted with the first subassembly 80 as shown in Figure 2 .
- a second subassembly 90 consists of the second spring element 58, the lower part 60b of the distance element 60 and the second retaining element 66.
- the pre-mounted subassemblies 80, 90 allow an easy mounting of the fuel injector cup 30 with the cylinder head 70 on the production line.
- the presented coupling of the fuel injector cup 30 with the cylinder head 70 enables to mount the fuel injector cup 30 on the cylinder head 70 without a direct contact between the fuel injector cup 30 and the cylinder head 70. Consequently, a noise transmission between the cylinder head 70 and the fuel rail 18 can be kept small or even be avoided.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20100002236 EP2363593B1 (fr) | 2010-03-04 | 2010-03-04 | Dispositif de couplage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20100002236 EP2363593B1 (fr) | 2010-03-04 | 2010-03-04 | Dispositif de couplage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2363593A1 true EP2363593A1 (fr) | 2011-09-07 |
EP2363593B1 EP2363593B1 (fr) | 2013-05-15 |
Family
ID=42320202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20100002236 Active EP2363593B1 (fr) | 2010-03-04 | 2010-03-04 | Dispositif de couplage |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2363593B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130008411A1 (en) * | 2010-03-25 | 2013-01-10 | Giandomenico Serra | Coupling device |
EP2657504A1 (fr) * | 2012-04-26 | 2013-10-30 | Robert Bosch Gmbh | Support pour la fixation d'un composant sur un moteur à combustion interne |
WO2013189637A1 (fr) * | 2012-06-20 | 2013-12-27 | Robert Bosch Gmbh | Support pour fixer un distributeur de carburant à un moteur à combustion interne et système d'injection de carburant comprenant un tel support |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2851552B1 (fr) * | 2013-09-18 | 2017-03-01 | Continental Automotive GmbH | Ensemble de fixation pour rail de carburant d'un moteur à combustion |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000009000A (ja) * | 1998-06-19 | 2000-01-11 | Mitsubishi Motors Corp | インジェクタの取付け構造 |
DE102005020380A1 (de) * | 2005-05-02 | 2006-11-09 | Robert Bosch Gmbh | Brennstoffeinspritzvorrichtung |
US20080075403A1 (en) * | 2006-09-27 | 2008-03-27 | Jason Holt | Work Piece Isolating Assembly |
-
2010
- 2010-03-04 EP EP20100002236 patent/EP2363593B1/fr active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000009000A (ja) * | 1998-06-19 | 2000-01-11 | Mitsubishi Motors Corp | インジェクタの取付け構造 |
DE102005020380A1 (de) * | 2005-05-02 | 2006-11-09 | Robert Bosch Gmbh | Brennstoffeinspritzvorrichtung |
US20080075403A1 (en) * | 2006-09-27 | 2008-03-27 | Jason Holt | Work Piece Isolating Assembly |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130008411A1 (en) * | 2010-03-25 | 2013-01-10 | Giandomenico Serra | Coupling device |
US10393080B2 (en) * | 2010-03-25 | 2019-08-27 | Continental Automotive Gmbh | Coupling device |
EP2657504A1 (fr) * | 2012-04-26 | 2013-10-30 | Robert Bosch Gmbh | Support pour la fixation d'un composant sur un moteur à combustion interne |
WO2013189637A1 (fr) * | 2012-06-20 | 2013-12-27 | Robert Bosch Gmbh | Support pour fixer un distributeur de carburant à un moteur à combustion interne et système d'injection de carburant comprenant un tel support |
KR20150020582A (ko) * | 2012-06-20 | 2015-02-26 | 로베르트 보쉬 게엠베하 | 내연기관에 연료 분배기를 고정하기 위한 리테이너 및 상기 리테이너를 구비한 연료 분사 시스템 |
US9863387B2 (en) | 2012-06-20 | 2018-01-09 | Robert Bosch Gmbh | Holder for fastening a fuel distributor to an internal combustion engine, and fuel injection system having such a holder |
KR102074655B1 (ko) | 2012-06-20 | 2020-02-07 | 로베르트 보쉬 게엠베하 | 내연기관에 연료 분배기를 고정하기 위한 리테이너 및 상기 리테이너를 구비한 연료 분사 시스템 |
Also Published As
Publication number | Publication date |
---|---|
EP2363593B1 (fr) | 2013-05-15 |
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