EP2578868A1 - Clamping claw for a fuel injection nozzle - Google Patents
Clamping claw for a fuel injection nozzle Download PDFInfo
- Publication number
- EP2578868A1 EP2578868A1 EP12178972.1A EP12178972A EP2578868A1 EP 2578868 A1 EP2578868 A1 EP 2578868A1 EP 12178972 A EP12178972 A EP 12178972A EP 2578868 A1 EP2578868 A1 EP 2578868A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hold
- side walls
- down device
- injection nozzle
- screw opening
- 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
- 238000002347 injection Methods 0.000 title claims description 12
- 239000007924 injection Substances 0.000 title claims description 12
- 239000000446 fuel Substances 0.000 title claims description 7
- 210000000078 claw Anatomy 0.000 title description 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 3
- 238000012805 post-processing Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 claims 1
- 210000001061 forehead Anatomy 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000002184 metal 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
- 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
- F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
-
- 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
-
- 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
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
-
- 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 hold-down device, in particular for a fuel injection nozzle of an internal combustion engine, which has two upright side walls and a screw opening, wherein the side walls are present at their Endstirnen as clamping surfaces.
- this object is achieved in that the hold-down, also called clamping claw, made of thin-walled steel punching-bending technology is shown, wherein the upper sides of the side walls are bridged in the section of their longitudinal center of a preferably bulged crossbar with the screw opening, so that in cross-section an inverted U Formed profile and each end is fork-like open and wherein the undersides of the side walls in the open Endstirnen exist as the clamping surfaces.
- the side walls of the blank holder according to the invention should have a completely smooth-walled, unequipped course, which is another contribution to simplifying the component.
- the hold-down may be designed for a tension of only one injector on a cylinder head. However, it is equally provided to fix it at each of its ends depending on an injection nozzle.
- it is hereby to present this mirror-symmetrically with respect to its longitudinal and transverse center plane.
- it does not matter which end of the hold-down is in contact with the cylinder head and which is in engagement with the injection nozzle.
- the hold-down device according to the present invention may also find application outside of injection / engine manufacturing, so generally in engineering or similar areas for fixing workpieces, etc.
- a hold-down 1 for a fuel injector 10 of an internal combustion engine Is shown in Fig. 1 a hold-down 1 for a fuel injector 10 of an internal combustion engine.
- This hold-down 1 consists of thin-walled sheet steel and is shown punching and bending technology without machining.
- the hold-down device 1 has two upright and straight side walls 2. Their upper sides 3 are bridged in the section of their longitudinal center 4 by an integrally connected transverse bar 5 with a central screw opening 6. In cross-section, there is thus an inverted U-profile in this section. It can be seen that the side walls 2 are bulged with the connecting them crossbar 5 from the top 3 away.
- Each end 9, 12 of the hold-down 1 is open like a fork. Bottoms 7 of the side walls 2 at their Endstirnen 8 are formed as clamping surfaces. This area is additionally marked.
- Fig. 2 At the other end 12 it lies on a support surface 11 extending from the cylinder head 14 of the internal combustion engine.
- Fig. 3 serves the hold-down 1 at each of its ends 9, 12 in contact with an injection nozzle 10. For this he engages in a groove 13 of the respective injection nozzle 10 and is supported on the undersides of these.
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
Die Erfindung betrifft einen Niederhalter, insbesondere für eine Kraftstoffeinspritzdüse einer Brennkraftmaschine, der zwei aufrechte Seitenwände und eine Schraubenöffnung hat, wobei die Seitenwände bei ihren Endstirnen als Spannflächen vorliegen.The invention relates to a hold-down device, in particular for a fuel injection nozzle of an internal combustion engine, which has two upright side walls and a screw opening, wherein the side walls are present at their Endstirnen as clamping surfaces.
Es sind Niederhalter für Kraftstoffeinspritzdüsen von qualitäts- oder quantitätsgesteuerten Brennkraftmaschinen vorbekannt, die urformtechnisch durch Gießen oder umformtechnisch durch Schmieden hergestellt sind. Diese haben ein zu großes Gewicht. Deren Fertigungsprozess stellt sich in Großserie als zu teuer dar und es ist eine vergleichsweise geringe Maßhaltigkeit gegeben. Zudem muss i. d. R. noch ein spanabhebender Nacharbeitsprozess erfolgen.There are known hold-down for fuel injectors of quality or quantity-controlled internal combustion engines, which are prepared by casting or forming technology by forging. These are too heavy. Their manufacturing process is in mass production as too expensive and it is given a relatively small dimensional stability. In addition, i. d. R. still a machining reworking process done.
Es ist daher Aufgabe der Erfindung, einen sehr preiswerten Niederhalter zu kreieren, der hohen Belastungen standhält.It is therefore an object of the invention to create a very inexpensive hold-down that can withstand high loads.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass der Niederhalter, auch Spannpratze genannt, aus dünnwandigem Stahlblech stanz-biegetechnisch dargestellt ist, wobei Oberseiten der Seitenwände im Abschnitt ihrer Längsmitte von einem vorzugsweise ausgebauchten Querbalken mit der Schraubenöffnung überbrückt sind, so dass im Querschnitt ein umgekehrtes U-Profil gebildet und jedes Ende gabelartig offen ist und wobei Unterseiten der Seitenwände bei den offenen Endstirnen als die Spannflächen vorliegen.According to the invention, this object is achieved in that the hold-down, also called clamping claw, made of thin-walled steel punching-bending technology is shown, wherein the upper sides of the side walls are bridged in the section of their longitudinal center of a preferably bulged crossbar with the screw opening, so that in cross-section an inverted U Formed profile and each end is fork-like open and wherein the undersides of the side walls in the open Endstirnen exist as the clamping surfaces.
Somit ist ein sehr einfach hinsichtlich seiner Geometrie gestalteter Niederhalter ohne die vorgenannten Nachteile geschaffen. Als Stahlblech kommt bspw. ein Einsatzstahl infrage, der einsatzgehärtet / carbonitriert und anschließend angelassen ist. Der Niederhalter hat trotz dessen Dünnwandigkeit eine hervorragende Steifigkeit. Hervorzuheben ist die gute Maßhaltigkeit, so dass auf eine spanende oder andere Nachbearbeitung in der Regel verzichtet werden kann. Dabei ist, s. a. nachfolgende Erläuterungen, unter "Spannfläche" nach dem Anspruch 1 auch diejenige Fläche zu verstehen, welche bei der Variante mit lediglich einer einzuspannenden Einspritzdüse als Auflagefläche gegenüber dem Zylinderkopf oder einem mit dem Zylinderkopf verbundenen Bauteil fungiert.Thus, a very simple in terms of its geometry designed hold-down without the aforementioned disadvantages is created. As a steel sheet is, for example, a case steel in question, the case hardened / carbonitrided and then tempered. The hold-down has excellent rigidity despite its thinness. To emphasize is the good dimensional accuracy, so that can be dispensed with a chipping or other post-processing in the rule. It is, sa following explanations, under "clamping surface" after the
Die Seitenwände des erfindungsgemäßen Niederhalters sollen einen komplett glattwandigen, ungekröpften Verlauf haben, was ein weiterer Beitrag zur Bauteilvereinfachung ist.The side walls of the blank holder according to the invention should have a completely smooth-walled, unequipped course, which is another contribution to simplifying the component.
Gemäß einer weiteren Konkretisierung der Erfindung ist es vorgesehen, die Schraubenöffnung zu stanzen. Dies soll während des eigentlichen Stanz-Biegeprozesses des Niederhalters aus einer Platine / einem Blechband mit realisiert werden. Ein Umgebungsbereich der Schraubenöffnung ist vorteilhafterweise mit einer vergleichsweise geringen Rauheit (≤ Ra 3,2) ausgebildet, so dass hierbei im Einbau die Kerbfaktoren minimiert sind.According to a further concretization of the invention, it is provided to punch the screw opening. This should be realized during the actual punching-bending process of the blank holder from a board / a metal strip with. A surrounding area of the screw opening is advantageously formed with a comparatively small roughness (≦
In Fortbildung der Erfindung ist es vorgeschlagen, einen Bereich der Seitenwände bei den Spannflächen zusätzlich anzuprägen. Somit ist in diesem wichtigen Funktionsbereich eine gute Maßhaltigkeit und hohe Oberflächengüte gegeben.In a further development of the invention, it is proposed to additionally impress a region of the side walls in the clamping surfaces. Thus, a good dimensional stability and high surface quality is given in this important functional area.
Der Niederhalter kann für eine Verspannung lediglich einer Einspritzdüse auf einem Zylinderkopf ausgelegt sein. Es ist jedoch gleichermaßen vorgesehen, hierüber an jedem seiner Enden je eine Einspritzdüse zu fixieren. Vorteilhaft bspw. hinsichtlich eines Handlings und einer Montage des vorschlagsgemäßen Niederhalters ist es hierbei, diesen in Bezug auf seine Längs- und Quermittelebene spiegelsymmetrisch darzustellen. Somit spielt es bspw. bei der Variante zur Verspannung lediglich einer Einspritzdüse keine Rolle, welches Ende des Niederhalters in Kontakt mit dem Zylinderkopf und welches in Eingriff mit der Einspritzdüse ist.The hold-down may be designed for a tension of only one injector on a cylinder head. However, it is equally provided to fix it at each of its ends depending on an injection nozzle. Advantageously, for example, in terms of handling and assembly of the proposed hold-down, it is hereby to present this mirror-symmetrically with respect to its longitudinal and transverse center plane. Thus, for example, in the variant for tensioning only one injection nozzle, it does not matter which end of the hold-down is in contact with the cylinder head and which is in engagement with the injection nozzle.
Der Niederhalter gemäß der vorliegenden Erfindung kann auch Anwendung außerhalb der Einspritztechnik / des Motorenbaus, so allgemein im Maschinenbau oder ähnlichen Bereichen zur Fixierung von Werkstücken etc. finden.The hold-down device according to the present invention may also find application outside of injection / engine manufacturing, so generally in engineering or similar areas for fixing workpieces, etc.
Zur Zeichnung:
- ●
Fig. 1 offenbart eine räumliche Ansicht eines Niederhalters für eine Kraftstoffeinspritzdüse; - ●
Fig. 2 zeigt eine schematische Einbauansicht des Niederhalters in Eingriff mit einer Einspritzdüse und aus - ●
Fig. 3 geht eine Ansicht wie vorgenannt hervor, bei welcher der Niederhalter jedoch auf zwei Einspritzdüsen agiert.
- ●
Fig. 1 discloses a three-dimensional view of a hold-down for a fuel injector; - ●
Fig. 2 shows a schematic installation view of the blank holder in engagement with an injection nozzle and off - ●
Fig. 3 goes a view as above, however, in which the hold-down acts on two injectors.
Dargestellt ist in
Der Niederhalter 1 hat zwei aufrechte und gerade verlaufende Seitenwände 2. Deren Oberseiten 3 sind im Abschnitt ihrer Längsmitte 4 von einem einteilig angebundenen Querbalken 5 mit einer mittigen Schraubenöffnung 6 überbrückt. Im Querschnitt liegt in diesem Abschnitt somit ein umgekehrtes U-Profil vor. Zu erkennen ist, dass die Seitenwände 2 mit dem diese verbindenden Querbalken 5 von der Oberseite 3 weg ausgebaucht sind.The hold-down
Jedes Ende 9, 12 des Niederhalters 1 ist gabelartig offen. Unterseiten 7 der Seitenwände 2 bei ihren Endstirnen 8 sind als Spannflächen ausgebildet. Dieser Bereich ist zusätzlich geprägt.Each
Gemäß
Gemäß
Zudem geht aus den
- 1)1)
- NiederhalterStripper plate
- 2)2)
- SeitenwandSide wall
- 3)3)
- Oberseitetop
- 4)4)
- Längsmittelongitudinal center
- 5)5)
- Querbalkencrossbeam
- 6)6)
- Schraubenöffnungscrew opening
- 7)7)
- Unterseite, SpannflächeBottom, clamping surface
- 8)8th)
- EndstirnEndstirn
- 9)9)
- eines Endean end
- 10)10)
- Kraftstoffeinspritzdüsefuel Injector
- 11)11)
- Abstützflächesupporting
- 12)12)
- anderes Endeother end
- 13)13)
- Nutgroove
- 14)14)
- Zylinderkopfcylinder head
- 15)15)
- Schraubmittelscrew
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110084064 DE102011084064A1 (en) | 2011-10-06 | 2011-10-06 | Downholder for a fuel injector |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2578868A1 true EP2578868A1 (en) | 2013-04-10 |
EP2578868B1 EP2578868B1 (en) | 2014-02-12 |
Family
ID=46614366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12178972.1A Active EP2578868B1 (en) | 2011-10-06 | 2012-08-02 | Clamping claw for a fuel injection nozzle |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2578868B1 (en) |
JP (1) | JP2013083258A (en) |
CN (1) | CN103032231B (en) |
DE (1) | DE102011084064A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2902617A1 (en) * | 2014-01-30 | 2015-08-05 | Kabushiki Kaisha Toyota Jidoshokki | Structure for securing injectors |
RU2696185C2 (en) * | 2014-07-22 | 2019-07-31 | Форд Глобал Текнолоджиз, Ллк | Diesel engine fuel injector anchor clamp (embodiments) and engine assembly comprising fuel injector clamp |
IT201900005704A1 (en) * | 2019-04-12 | 2020-10-12 | A G Porta S P A | Process for manufacturing metal components, in particular components for motor vehicles, such as forks for gearboxes and support brackets for internal combustion engine injectors, starting from a single piece of sheet metal |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106670255B (en) * | 2016-12-10 | 2018-03-09 | 浙江黎明发动机零部件有限公司 | A kind of fuel injector punching type fixed plate and its processing method and assembly tooling |
DE102020102991A1 (en) | 2020-02-06 | 2021-08-12 | Schaeffler Technologies AG & Co. KG | Hold-down device for two fuel injection nozzles of an internal combustion engine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT369142B (en) * | 1980-05-09 | 1982-12-10 | Friedmann & Maier Ag | DEVICE FOR CLAMPING A NOZZLE HOLDER AGAINST THE CYLINDER HEAD OF AN INJECTION INTERNAL COMBUSTION ENGINE |
GB2177450A (en) * | 1985-06-27 | 1987-01-21 | Lucas Ind Plc | Clamping device for fuel injection nozzle |
EP0848158A1 (en) * | 1996-12-13 | 1998-06-17 | Isuzu Motors Limited | Direct injection type multicylinder engine |
EP1001161A2 (en) * | 1998-11-11 | 2000-05-17 | Isuzu Motors Limited | Arrangement for clamping injectors |
EP1260706A2 (en) * | 2001-05-25 | 2002-11-27 | Robert Bosch Gmbh | Device for fixing a fuel injector in an internal combustion engine |
US7334572B1 (en) * | 2007-01-30 | 2008-02-26 | Ford Global Technologies, Llc | System and method for securing fuel injectors |
WO2012054601A2 (en) * | 2010-10-20 | 2012-04-26 | Illinois Tool Works Inc. | Fuel injector bracket assembly |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2937081B2 (en) * | 1995-06-26 | 1999-08-23 | いすゞ自動車株式会社 | Fuel injection nozzle tightening device |
JP3473725B2 (en) * | 1995-11-24 | 2003-12-08 | 日野自動車株式会社 | Unit injector mounting structure for diesel engine |
DE19605934C1 (en) * | 1996-02-17 | 1997-06-12 | Audi Ag | Cylinder head for IC engine with direct fuel injection |
GB2311558A (en) * | 1996-03-28 | 1997-10-01 | Stanadyne Automotive Corp | Fuel injection nozzle with compressive radial pre-loading |
DE10109408A1 (en) * | 2001-02-28 | 2002-09-05 | Bosch Gmbh Robert | fastening device |
-
2011
- 2011-10-06 DE DE201110084064 patent/DE102011084064A1/en not_active Withdrawn
-
2012
- 2012-08-02 CN CN201210273281.9A patent/CN103032231B/en active Active
- 2012-08-02 EP EP12178972.1A patent/EP2578868B1/en active Active
- 2012-10-05 JP JP2012223533A patent/JP2013083258A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT369142B (en) * | 1980-05-09 | 1982-12-10 | Friedmann & Maier Ag | DEVICE FOR CLAMPING A NOZZLE HOLDER AGAINST THE CYLINDER HEAD OF AN INJECTION INTERNAL COMBUSTION ENGINE |
GB2177450A (en) * | 1985-06-27 | 1987-01-21 | Lucas Ind Plc | Clamping device for fuel injection nozzle |
EP0848158A1 (en) * | 1996-12-13 | 1998-06-17 | Isuzu Motors Limited | Direct injection type multicylinder engine |
EP1001161A2 (en) * | 1998-11-11 | 2000-05-17 | Isuzu Motors Limited | Arrangement for clamping injectors |
EP1260706A2 (en) * | 2001-05-25 | 2002-11-27 | Robert Bosch Gmbh | Device for fixing a fuel injector in an internal combustion engine |
US7334572B1 (en) * | 2007-01-30 | 2008-02-26 | Ford Global Technologies, Llc | System and method for securing fuel injectors |
WO2012054601A2 (en) * | 2010-10-20 | 2012-04-26 | Illinois Tool Works Inc. | Fuel injector bracket assembly |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2902617A1 (en) * | 2014-01-30 | 2015-08-05 | Kabushiki Kaisha Toyota Jidoshokki | Structure for securing injectors |
RU2696185C2 (en) * | 2014-07-22 | 2019-07-31 | Форд Глобал Текнолоджиз, Ллк | Diesel engine fuel injector anchor clamp (embodiments) and engine assembly comprising fuel injector clamp |
IT201900005704A1 (en) * | 2019-04-12 | 2020-10-12 | A G Porta S P A | Process for manufacturing metal components, in particular components for motor vehicles, such as forks for gearboxes and support brackets for internal combustion engine injectors, starting from a single piece of sheet metal |
Also Published As
Publication number | Publication date |
---|---|
DE102011084064A1 (en) | 2013-04-11 |
CN103032231B (en) | 2017-12-15 |
JP2013083258A (en) | 2013-05-09 |
EP2578868B1 (en) | 2014-02-12 |
CN103032231A (en) | 2013-04-10 |
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