WO2005066487A1 - Method for tightening a nozzle tensioning nut of an injector for fuel injection, and injector and nozzle tensioning nut - Google Patents
Method for tightening a nozzle tensioning nut of an injector for fuel injection, and injector and nozzle tensioning nut Download PDFInfo
- Publication number
- WO2005066487A1 WO2005066487A1 PCT/EP2004/053610 EP2004053610W WO2005066487A1 WO 2005066487 A1 WO2005066487 A1 WO 2005066487A1 EP 2004053610 W EP2004053610 W EP 2004053610W WO 2005066487 A1 WO2005066487 A1 WO 2005066487A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- housing
- injector
- clamping nut
- nozzle clamping
- Prior art date
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
- F02M61/16—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
- F02M2200/03—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
- F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
Definitions
- the invention is based on a method for tightening a nozzle clamping nut of an injector for fuel injection or an injector or a nozzle clamping nut according to the category of the independent claims 1 10 4 and 11.
- the nozzle clamping nut is usually pushed over a cylindrically shaped nozzle housing and screwed to an injector housing in the axial direction.
- the nozzle clamping nut is tightened with a predetermined torque.
- the invention has for its object to provide a method for tightening a nozzle nut on an injector, with which the tightening of the nozzle nut can be carried out much easier and with greater reliability. This object is achieved with the features of the independent claims 1, 10 and 11.
- the measures listed in the dependent claims provide advantageous developments and improvements to the method specified in the independent claims 1, 10 and 11 for tightening the nozzle clamping nut or the injector or the nozzle clamping nut. It is considered to be particularly advantageous that the holding surface is designed as a raised contour or as a groove. With a raised contour as well as with a groove, the pulling device can easily be applied and the tensile force can thus be specifically transferred to the nozzle clamping nut or to the injector housing without causing harmful tension in the interior of the components.
- the arrangement is radial to the axis of the injector housing.
- the holding surface is at least partially formed on the circumference of the components and shaped in such a way that the tensile force can be transmitted as evenly as possible to the nozzle clamping nut and the injector housing.
- a contour shoulder already present on the injector housing as a holding surface for the pulling device. This can be, for example, a narrowing in the lower area of the injector housing, at which the counter thread for the nozzle clamping nut is cut. A pulling or holding device can then be attached to this existing housing shoulder without additional effort.
- a particularly advantageous solution is also seen in providing, as the holding surface, one or more grooves or raised contours which are suitable for receiving the pulling device. are suitable.
- several grooves or raised contours can be arranged one above the other in the lower region of the nozzle clamping nut. This has the advantage that the tensile force can be distributed over a larger area, so that the material is not subjected to excessive stress during stretching.
- contours or grooves can be produced particularly easily with appropriate tools with a symmetrical cross section.
- the nozzle housing can be precisely pre-adjusted on the one hand and fixed in the assumed position.
- the nozzle holder can be pressed against the injector housing with an axial preload using the hold-down device, which rests against the lower tip of the nozzle housing.
- the frictional resistance at the contact surfaces between the nozzle clamping nut and the nozzle housing can be further reduced in an advantageous manner.
- Holding surfaces can be designed so that they also transmit the torque for tightening the nozzle clamping nut can be.
- the formation of a hexagon, as has been used up to now, is then no longer necessary.
- FIG. 1 shows a schematic illustration of a sectional view of an injector with a pulling device
- FIG. 2 shows a nozzle clamping nut according to the invention with three grooves, which have a symmetrical cross section
- FIG. 3 shows a nozzle clamping nut according to the invention with two grooves which have a symmetrical cross section
- FIG. 4 shows a nozzle clamping nut according to the invention with two grooves, in which the upper groove has a sawtooth-shaped cross section,
- FIG. 5 shows a nozzle clamping nut according to the invention with two grooves, in which the upper groove has a deeper, U-shaped cross section,
- FIG. 6 shows a nozzle clamping nut according to the invention with two grooves, in which the two grooves have a U-shaped cross section
- FIG. 7 shows a nozzle clamping nut according to the invention with a groove which has a sawtooth-shaped cross section
- FIG. 8 shows a nozzle clamping nut according to the invention with a groove which has a symmetrical cross section
- FIG. 9 shows a nozzle clamping nut according to the invention with a raised contour as a holding surface.
- the sectional view in FIG. 1 essentially shows a cross section through an injector for fuel injection, which can be installed in a cylinder of an internal combustion engine.
- the injector with its injector housing 1 is shown in the upper part of FIG.
- a key element in the interior of the injector housing 1 is a drive element 2, with which a valve needle 4 can be controlled, which is located in a nozzle housing 6 at the lower end of the injector housing 1 and which contains the injection holes for injecting the fuel into the cylinder releases or closes.
- the fuel channels in the injector have not been shown for reasons of clarity.
- FIG. 1 shows the nozzle housing 6, over which a nozzle clamping nut 7 has been pushed from below.
- the nozzle clamping nut 7 is screwed to a threaded part 12 which is arranged on a contour shoulder 8 in the lower region of the injector housing 1.
- the nozzle clamping nut 7 is shaped such that the nozzle housing 6 rests with a shoulder on an inner bottom surface of the nozzle clamping nut 7 and forms corresponding contact surfaces 11 therewith.
- a stop disk 13 is arranged between the nozzle housing 6 and the injector housing 1, against which the nozzle housing is pressed when the nozzle clamping nut 7 is tightened.
- two spiral spring pins are preferably inserted vertically in the stop disk 13 and secure the relative position of the two components when the nozzle nut 7 is tightened.
- a holding device 3 is arranged on the injector housing 1, with which the injector housing 1 is firmly clamped for tightening the nozzle clamping nut 7.
- the holding device 3 engages with its lower end under the contour shoulder 8 of the injector housing 1, the serves as an abutment for a pulling device 3a and which is attached to the nozzle clamping nut 7.
- a groove 9 can be seen as an undercut, in which the pulling device 3a engages.
- two, three or more grooves 9 can be used. Furthermore, raised contours can be used, as will be explained later.
- the nozzle housing 6 can be centered on the nozzle clamping nut 7. Since the nozzle clamping nut 7 can now be tightened with a lower torque by a predetermined angle of rotation, the risk that the nozzle housing 6 will misalign with the injector housing 1 is considerably lower. Therefore, simple spiral spring pins can be used instead of the expensive cylinder pins to secure the relative positions of the components.
- the nozzle clamping nut 7 is relieved, so that the stored preload force can affect the components concerned. In particular, this ensures that the sealing of the fuel-carrying channels on the high-pressure sealing surface is ensured during the operating life of the injector.
- the harmful influences on high pressure tightness for example
- Figures 2 to 9 show alternative embodiments of the invention.
- the grooves 9 or raised contours 10 were drawn for the nozzle clamping nut 7. In principle, they can also be attached to the injector housing 1.
- the grooves 9 or contours 10 are arranged radially all around on the outer surface of the nozzle clamping nut 7 and / or the injector housing 1. They can also be segmented or in the form of bores.
- the grooves 9 or contours 10 are preferably attached to the lower end of the nozzle clamping nut 7 in order to obtain the longest possible expansion path for the nozzle clamping nut 7.
- FIG. 2 shows a partially cut-off nozzle clamping nut 7, at the lower end of which three grooves 9 are made. As can be seen in Figure 2, the grooves 9 are symmetrical and have the same notch depth.
- FIG. 3 shows a nozzle clamping nut 7 with two symmetrically arranged grooves 9 in which - similar to FIG. 3, two grooves 9 are formed.
- the lower groove 9 is formed with a symmetrical cross section, while the upper groove 9 has a sawtooth-shaped cross section.
- two grooves 9 are also arranged on the nozzle clamping nut 7.
- the lower groove 9 has a sawtooth-shaped cross section.
- the upper groove 9, on the other hand, is symmetrical, but has a deeper cut.
- FIG. 6 shows a nozzle clamping nut 7, in which two symmetrically cut grooves 9 are arranged. Here, however, the notch depth is less in the lower groove 9.
- FIG. 7 shows a nozzle clamping nut 7 in which only one groove 9 is formed.
- the groove 9 has a sawtooth-shaped cross section.
- FIG. 8 is designed with a groove 9 similar to that in FIG. 7. However, here the groove 9 is symmetrical.
- FIG. 9 shows a nozzle clamping nut 7 in which a raised contour 10 is formed at the lower edge.
- the contour 10 is designed as a reinforcing ring and is arranged radially on the circumference of the nozzle clamping nut 7.
- the contour 10 is not designed as a closed ring in this exemplary embodiment, but has a gap 14.
- the pulling device 3a can engage in the gap 14 with a corresponding pin, so that the torque for tightening the nozzle clamping nut 7 can thereby be transmitted without slippage.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112004002581T DE112004002581D2 (en) | 2004-01-12 | 2004-12-20 | Method for tightening a nozzle retaining nut of an injector for fuel injection and injector and nozzle lock nut |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004001694.1 | 2004-01-12 | ||
DE102004001694 | 2004-01-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005066487A1 true WO2005066487A1 (en) | 2005-07-21 |
Family
ID=34744683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/053610 WO2005066487A1 (en) | 2004-01-12 | 2004-12-20 | Method for tightening a nozzle tensioning nut of an injector for fuel injection, and injector and nozzle tensioning nut |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE112004002581D2 (en) |
WO (1) | WO2005066487A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007045948B3 (en) * | 2007-09-25 | 2008-09-25 | L'orange Gmbh | Mounting device for modular injector of internal combustion engine, has injector housing and nozzle body, which is connected with injector housing over axial overlapping of nozzle nut |
WO2010031628A1 (en) * | 2008-09-17 | 2010-03-25 | Robert Bosch Gmbh | Fuel injection valve |
WO2011092040A1 (en) * | 2010-01-28 | 2011-08-04 | Robert Bosch Gmbh | Method for the high-pressure-tight connection of at least one plate-shaped body to a further body of a fuel injector and fuel injector |
EP2592260A1 (en) * | 2011-11-09 | 2013-05-15 | Robert Bosch Gmbh | Fuel injector, method for the assembly of a fuel injector and tensioning device for mounting of a fuel injector |
WO2013091936A1 (en) * | 2011-12-20 | 2013-06-27 | Robert Bosch Gmbh | Fuel injection valve |
WO2015024989A1 (en) * | 2013-08-23 | 2015-02-26 | Continental Automotive Gmbh | Actuating drive for operating an injection valve, and injection valve |
FR3062175A1 (en) * | 2017-01-24 | 2018-07-27 | Delphi International Operations Luxembourg S.A R.L. | METHOD FOR ASSEMBLING A FUEL INJECTOR |
WO2018141473A1 (en) * | 2017-02-02 | 2018-08-09 | L'orange Gmbh | Arrangement |
EP2664782B1 (en) * | 2012-05-15 | 2018-08-29 | MAN Diesel & Turbo SE | Injector for a fuel supply system of a combustion engine and fuel supply system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3980234A (en) * | 1975-06-13 | 1976-09-14 | Stanadyne, Inc. | Fuel injection nozzle |
DE19902282A1 (en) * | 1999-01-21 | 2000-08-17 | Siemens Ag | Injector for an injection system of an internal combustion engine |
US20020109021A1 (en) * | 2001-02-14 | 2002-08-15 | Yasunori Kiriki | Fuel injection nozzle |
US20030132318A1 (en) * | 2000-09-12 | 2003-07-17 | Kurt Frank | Fuel injection valve for internal combustion engines |
-
2004
- 2004-12-20 DE DE112004002581T patent/DE112004002581D2/en not_active Expired - Fee Related
- 2004-12-20 WO PCT/EP2004/053610 patent/WO2005066487A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3980234A (en) * | 1975-06-13 | 1976-09-14 | Stanadyne, Inc. | Fuel injection nozzle |
DE19902282A1 (en) * | 1999-01-21 | 2000-08-17 | Siemens Ag | Injector for an injection system of an internal combustion engine |
US20030132318A1 (en) * | 2000-09-12 | 2003-07-17 | Kurt Frank | Fuel injection valve for internal combustion engines |
US20020109021A1 (en) * | 2001-02-14 | 2002-08-15 | Yasunori Kiriki | Fuel injection nozzle |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007045948B3 (en) * | 2007-09-25 | 2008-09-25 | L'orange Gmbh | Mounting device for modular injector of internal combustion engine, has injector housing and nozzle body, which is connected with injector housing over axial overlapping of nozzle nut |
RU2550296C2 (en) * | 2008-09-17 | 2015-05-10 | Роберт Бош Гмбх | Fuel atomiser |
WO2010031628A1 (en) * | 2008-09-17 | 2010-03-25 | Robert Bosch Gmbh | Fuel injection valve |
WO2011092040A1 (en) * | 2010-01-28 | 2011-08-04 | Robert Bosch Gmbh | Method for the high-pressure-tight connection of at least one plate-shaped body to a further body of a fuel injector and fuel injector |
CN102725510A (en) * | 2010-01-28 | 2012-10-10 | 罗伯特·博世有限公司 | Method for the high-pressure-tight connection of at least one plate-shaped body to a further body of a fuel injector and fuel injector |
EP2592260A1 (en) * | 2011-11-09 | 2013-05-15 | Robert Bosch Gmbh | Fuel injector, method for the assembly of a fuel injector and tensioning device for mounting of a fuel injector |
US9822749B2 (en) | 2011-12-20 | 2017-11-21 | Robert Bosch Gmbh | Fuel injector |
WO2013091936A1 (en) * | 2011-12-20 | 2013-06-27 | Robert Bosch Gmbh | Fuel injection valve |
EP2664782B1 (en) * | 2012-05-15 | 2018-08-29 | MAN Diesel & Turbo SE | Injector for a fuel supply system of a combustion engine and fuel supply system |
WO2015024989A1 (en) * | 2013-08-23 | 2015-02-26 | Continental Automotive Gmbh | Actuating drive for operating an injection valve, and injection valve |
CN105723082A (en) * | 2013-08-23 | 2016-06-29 | 大陆汽车有限公司 | Actuating drive for operating an injection valve, and injection valve |
US10107242B2 (en) | 2013-08-23 | 2018-10-23 | Continental Automotive Gmbh | Actuating drive for an injection valve, and injection valve |
FR3062175A1 (en) * | 2017-01-24 | 2018-07-27 | Delphi International Operations Luxembourg S.A R.L. | METHOD FOR ASSEMBLING A FUEL INJECTOR |
WO2018141473A1 (en) * | 2017-02-02 | 2018-08-09 | L'orange Gmbh | Arrangement |
US11725618B2 (en) | 2017-02-02 | 2023-08-15 | Woodward L'orange Gmbh | Arrangement |
Also Published As
Publication number | Publication date |
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DE112004002581D2 (en) | 2006-11-23 |
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