WO2000029739A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- WO2000029739A1 WO2000029739A1 PCT/DE1999/002332 DE9902332W WO0029739A1 WO 2000029739 A1 WO2000029739 A1 WO 2000029739A1 DE 9902332 W DE9902332 W DE 9902332W WO 0029739 A1 WO0029739 A1 WO 0029739A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing body
- valve seat
- valve
- fuel injection
- face
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 50
- 238000002347 injection Methods 0.000 title claims abstract description 35
- 239000007924 injection Substances 0.000 title claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 3
- 238000003466 welding Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000036316 preload Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- F02M61/161—Means for adjusting injection-valve lift
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
Definitions
- the invention relates to a fuel injection valve according to the preamble of claim 1.
- This fuel injection valve has a valve closing body which cooperates with a valve seat surface formed on a valve seat support to form a sealing seat.
- the valve closing body can be electromagnetically actuated by means of a solenoid via a valve needle extending inside the valve seat support and an armature connected to the valve needle at the end opposite the valve closing body.
- the valve seat support is inserted into a housing body and can be preloaded against a lifting disk which is inserted between the housing body and the valve seat support by means of a screwing screwed into the housing body.
- the stroke adjusting disc is therefore located inside the housing body.
- the stroke adjusting disc serves to adjust the stroke of the valve closing body when the fuel injection valve is actuated electromagnetically.
- a variation in the thickness measurement of the stroke adjusting disc thus leads to a variation in the axial position of the valve seat surface. With a certain length of the valve needle and a certain position a stop surface for the armature thus defines the valve lift.
- This known fuel injection valve is disadvantageous insofar as the lifting adjusting disk has a relatively small diameter and therefore there is not sufficient protection against tilting of the valve seat carrier for all applications. It is particularly disadvantageous that the Hubemstellin is located inside the housing body and thus the assembly of the housing body, valve seat support and Hubeinstellin requires an insertion of the Hubemstellin in the interior of the housing body, which is expensive to manufacture. There is also the risk that the thread required for the threaded ring is contaminated.
- FIG. 1 A known fuel injector of a similar design is shown in Fig. 1 and will be described in detail later. With regard to the arrangement of the stroke adjusting disc, this design corresponds to that of DE 196 26 576 AI, with the difference that the valve seat carrier is connected to the valve housing not by a threaded ring but by a Börde1 connection. This fuel injector also has the disadvantages already described.
- the fuel injector according to the invention with the features of claim 1 has the advantage that the stroke adjusting disc is simple and inexpensive due to the peripheral arrangement on the outside of the housing body. is inexpensive to assemble. At the same time, there is the advantage that the valve seat support is better secured against tilting relative to the housing body by the stroke adjusting disk due to the relatively large diameter of the stroke adjusting disk.
- the assembly of the lifting component disc is not susceptible to dirt and that there is a reduction in the number of individual parts due to the omission of the threaded ring provided in the prior art.
- the stroke adjusting disc can preferably be inserted into a circumferential groove of the housing body and rests on an inlet-soapy end face on the housing body and on a spray-side end face on a peripheral circumferential projection of the valve seat body.
- the connection between the housing body and the stroke adjusting disc on the one hand and between the stroke adjusting disc with the valve seat support on the other hand can then be made in each case by means of a weld seam.
- the Hubemstellin not only has the function of defining the axial position of the valve seat carrier relative to the housing body and thus the valve lift, but also the function of a connecting element between the housing body and the valve seat carrier.
- the weld seams preferably produce a welding shrinkage tension, which prestresses the housing body, the stroke adjusting disk and the valve seat body against one another. This results in a particularly high strength.
- valve seat body An inlet-side end of the valve seat body can preferably be inserted into an injection-side end of the housing body, these components being sealed off from one another by means of a seal.
- weld seams can be applied in a simple manner by welding tools which act radially from the outside.
- Fig. 1 shows an axial section through a fuel injection valve according to the prior art
- Fig. 2 is a partial axial section through an inventive fuel injector in the Hubemstellin.
- FIG. 1 For a better understanding of the invention, a fuel injection valve according to the prior art is shown in FIG. 1, so that the later description of the exemplary embodiment according to the invention can be limited to the special features according to the invention.
- the fuel injector shown in Fig. 1 is used to inject fuel, especially in a mixture-compressing, spark-ignition internal combustion engine.
- the fuel injector generally designated by the reference number 1, has a valve closing body 2, which cooperates with a valve seat surface 4 formed on a valve seat body 3 to form a sealing seat.
- the valve closing body 2 is via a valve needle 5 with an armature 6 connected.
- the armature 6 can be acted upon by means of a magnetic coil 7 with an axial force component in such a way that the valve closing body 2 lifts off the valve seat surface 4 and releases a spray opening 8.
- the valve closing body 2 is returned to its closed position by a return spring 9 acting on the armature 6.
- the preload of the return spring 9 can be adjusted via an adjusting sleeve 10 connected by means of a thread to a first housing body 11.
- the fuel flows through a fuel outlet opening 12 and a fuel filter 13 m, an axial longitudinal bore 14 of the first housing body 11 and further via an axial longitudinal bore 15 of the adjusting sleeve 10 and a longitudinal bore 16 of the armature 6 and a longitudinal bore 17 of a Hubemstellhunt to be described in more detail 18 m a longitudinal bore 19 of the valve seat carrier 3 and thus reaches the sealing seat formed by the valve closing body 2 with the valve seat surface 4.
- the first housing body 11 is surrounded by a plastic injection-molded body 20, on which a connector plug 21 for the electrical connection of a connection cable to the magnet coil 7 is also injection molded.
- a second housing body 22 is provided, which is connected to the first housing body 11 by a first flange connection 23.
- the second housing body 22 has a longitudinal bore 24, through which the valve seat support 3 is inserted axially and is sealed off from the second housing body 22 by means of a seal 25.
- the valve seat support 3 and the second housing body 22 are connected to one another by a second flange connection 30.
- the stroke adjusting disc 18 already described is located between a downstream end face 26 of the second housing body 22 and an upstream end face 27 of the valve seat carrier 3.
- the stroke adjusting disk 18 serves to fix the valve stroke, ie the stroke of the valve closing body 2 from the valve closing surface 4 when the fuel injector 1 is actuated.
- the valve stroke is due to a slight gap (not recognizable in FIG. 1) between the upstream end face 28 of the armature 6 and a downstream end face 29 of the first housing body 11. This gap in turn results from the length of the valve needle 5 and the armature 6, measured from the upstream end face 28 of the armature 6 to the contact surface of the valve closing body 2 on the valve closing surface 4 of the valve seat carrier 3, and through the axial position of the valve seat body 3.
- the valve lift is therefore dependent on the manufacturing tolerances of numerous components, in particular on the manufacturing tolerance of the valve closing body 4, the valve needle 5, the armature 6, the valve seat support 3 and the two housing bodies 11 and 22. Since the sum of these manufacturing tolerances is considerably greater than the one to be demanded Tolerance of the valve lift is measured according to a conventional method, the dimensions of the above-mentioned components determining the valve lift, and a suitable stroke adjustment disk is mated. The thickness dimension of the stroke adjusting disc is selected or manufactured in such a way that the required valve stroke occurs overall within a narrow tolerance window.
- the invention relates to an improvement in the arrangement and design of the stroke adjusting disk 18.
- Fig. 2 shows an embodiment of a fuel injector i according to the invention in an excerpt, sectional view. Only those elements are shown which are essential in relation to the invention. In order to facilitate the assignment, elements already described with reference to FIG. 1 are provided with the same reference numerals.
- the first housing body 11, the second housing body 22, the valve seat support 3, which are in a axial longitudinal bore 19 of the valve seat carrier 3 extending valve needle 5, the armature 6 connected to the valve needle 3, the return spring 9 acting on the valve needle 5 via a flange 40 and the solenoid 7 can be seen.
- the valve lift is defined by a gap 41 between the inlet-side end face 28 of the armature 6 and a spray-side end face 42 of a tubular section 43 of the second housing body 22.
- the tubular section 43 is connected to a radially outwardly projecting region 44 of the second housing body 22 via a thin connecting web 45.
- the connecting web 45 is dimensioned extremely thin in order to conduct the main part of the magnetic flux through the armature 6 hm and to avoid a magnetic short circuit on the connecting web 45.
- the armature 6 has bores 46 for the passage of the fuel.
- the stroke adjusting disk 18 surrounds an absp ⁇ tzseite end 47 of the second housing body 22 peripherally on the outside.
- the Hubemstellin 18 is preferably annular.
- the stroke adjusting disk 18 is a component of the valve housing and can be used in a circumferential groove 48 of the second housing body 22.
- the stroke adjusting disk 18 lies flush with an inlet-side end face 49 on an opposite, associated end face 50 of the second housing body 22 in the assembled state.
- An abspritzse term end face 51 of the Hubemstellin 18 lies flush against an opposite, associated end face 52 of the valve seat body 3 in the assembled state.
- the end face 52 opposite the end face 51 of the HuDemstellin 18 on the absp ⁇ tz side is formed on a peripherally circumferential projection 53 of the valve seat body 3.
- An inlet-side end 55 of the valve seat body 3 can be inserted into a receiving bore 56 of the injection-side end 47 of the second housing body 22, so that the injection-side end 47 of the second housing body 22 surrounded by the lifting adjusting disc 18 surrounds the inlet-side end 55 of the valve seat carrier 3.
- the inlet-end 55 of the valve seat carrier 3 is sealed to the spray-side end 47 of the second housing body 22 by means of the circumferential seal 25.
- the seal 25 is preferably formed as an O-Rmg and a radial groove 57 of the inlet-side end 55 of the valve seat carrier 3 is used.
- the stroke adjusting disc 18 is welded to the second housing body 22 by means of a first circumferential weld seam 58 on its inlet-side end face 49 and by means of a second circumferential weld seam 59 on its spray-side end face 51 to the valve seat support 3.
- the weld seams 58 and 59 can be produced without any technical difficulties using a welding tool which acts radially from the outside.
- the weld seams 58 and 59 do not extend over the entire end face 49 and 50 or 51 and 52.
- the invention makes specific use of the welding shrinkage stress caused by the weld seams 58 and 59.
- the welding shrinkage tension causes the second housing body 22, the stroke adjusting disk 18 and the valve seat support 3 to be preloaded against one another, so that a gap-free weld seam and high strength are achieved.
- a further advantage is that when the fuel injection valve 1 is joined together, the stroke adjusting disk 18 can be inserted into the circumferential groove 48 of the second housing body 22 without difficulty, and the fuel injection valve 1 is therefore extremely easy to assemble.
- the Hubemstellectomy 18, the axial bore 24 of the second housing body 22 must be used, which is more difficult to handle, especially in automatic production.
- the arrangement and assembly of the lifting adjusting disk 18 according to the invention is also insensitive to contamination.
- the seal 25 ensures that the fuel flowing inside the fuel injection valve 1 to the sealing seat does not penetrate as far as the weld seams 58 and 59.
- the weld seams 58 and 59 are therefore not loaded with the fuel pressure. This is particularly important in the case of high-pressure E injection valves, in which there is a high fuel pressure of up to 150 bar and nevertheless tight tolerances of the valve stroke of, for example, 0.2% must be achieved.
- the weld seams 58 and 59 do not have to ensure tightness, but merely absorb the axial forces between the second housing body 22 and the stroke adjusting disk 18 on the one hand and between the stroke adjusting disk 18 and the valve seat support 3 on the other hand. As a result, the preload forces can be kept low during welding.
- the threaded ring provided in the prior art according to DE 196 26 576 A1 is dispensed with. This saving of a component reduces the manufacturing costs.
- the connection between the first housing body 11 and the second housing body 22 can be made by a further weld 61, which can also be applied on the outside.
- the stroke adjusting disc 18 defines the valve stroke, it forms an integral part of the valve housing and it mediates the connection between the second housing body 44 and the valve seat support 3.
- the invention is not restricted to the exemplary embodiment shown.
- the arrangement of the stroke adjusting disk 18 according to the invention can also be used in the same way in the case of fuel injection valves 1 which open from the outside.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000582704A JP2002530567A (ja) | 1998-11-18 | 1999-07-29 | 燃料噴射弁 |
KR1020007007767A KR20010034147A (ko) | 1998-11-18 | 1999-07-29 | 연료 분사 밸브 |
DE59905997T DE59905997D1 (de) | 1998-11-18 | 1999-07-29 | Brennstoffeinspritzventil |
US09/600,503 US6435429B1 (en) | 1998-11-18 | 1999-07-29 | Fuel injection valve |
EP99950456A EP1047870B1 (de) | 1998-11-18 | 1999-07-29 | Brennstoffeinspritzventil |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853091.9 | 1998-11-18 | ||
DE19853091A DE19853091A1 (de) | 1998-11-18 | 1998-11-18 | Brennstoffeinspritzventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000029739A1 true WO2000029739A1 (de) | 2000-05-25 |
Family
ID=7888149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/002332 WO2000029739A1 (de) | 1998-11-18 | 1999-07-29 | Brennstoffeinspritzventil |
Country Status (7)
Country | Link |
---|---|
US (1) | US6435429B1 (de) |
EP (1) | EP1047870B1 (de) |
JP (1) | JP2002530567A (de) |
KR (1) | KR20010034147A (de) |
CZ (1) | CZ293800B6 (de) |
DE (2) | DE19853091A1 (de) |
WO (1) | WO2000029739A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005504216A (ja) * | 2001-09-05 | 2005-02-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 燃料噴射弁 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10108974A1 (de) * | 2001-02-24 | 2002-09-05 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
ITBO20050295A1 (it) * | 2005-04-29 | 2006-10-30 | Magneti Marelli Powertrain Spa | Inietore di carburante con attuatore elettromagnetico |
ATE352714T1 (de) * | 2005-06-17 | 2007-02-15 | Magneti Marelli Powertrain Spa | Brennstoffeinspritzventil |
DE102005052255B4 (de) * | 2005-11-02 | 2020-12-17 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
US7942349B1 (en) | 2009-03-24 | 2011-05-17 | Meyer Andrew E | Fuel injector |
JP5537493B2 (ja) * | 2011-05-13 | 2014-07-02 | 日立オートモティブシステムズ株式会社 | 燃料噴射弁のストローク調整方法及び燃料噴射弁 |
KR102683096B1 (ko) * | 2021-12-30 | 2024-07-09 | 주식회사 현대케피코 | 부품 물림식 인젝터 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2165308A (en) * | 1984-10-09 | 1986-04-09 | Diesel Kiki Co | Fuel injection nozzle for internal combustion engines |
DE4115457A1 (de) * | 1990-05-17 | 1991-11-21 | Avl Verbrennungskraft Messtech | Einspritzduese fuer eine brennkraftmaschine |
DE4023828A1 (de) * | 1990-07-27 | 1992-01-30 | Bosch Gmbh Robert | Verfahren zur einstellung eines ventils und ventil |
DE19626576A1 (de) * | 1996-07-02 | 1998-01-08 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19712589C1 (de) * | 1997-03-26 | 1998-06-04 | Bosch Gmbh Robert | Brennstoffeinspritzventil und Verfahren zur Herstellung einer Ventilnadel eines Brennstoffeinspritzventils |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4412277A1 (de) * | 1994-04-09 | 1995-10-12 | Bosch Gmbh Robert | Elektromagnetisch betätigbares Brennstoffeinspritzventil |
DE19629589B4 (de) * | 1996-07-23 | 2007-08-30 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
-
1998
- 1998-11-18 DE DE19853091A patent/DE19853091A1/de not_active Withdrawn
-
1999
- 1999-07-29 CZ CZ20002626A patent/CZ293800B6/cs not_active IP Right Cessation
- 1999-07-29 DE DE59905997T patent/DE59905997D1/de not_active Expired - Lifetime
- 1999-07-29 EP EP99950456A patent/EP1047870B1/de not_active Expired - Lifetime
- 1999-07-29 JP JP2000582704A patent/JP2002530567A/ja not_active Ceased
- 1999-07-29 WO PCT/DE1999/002332 patent/WO2000029739A1/de not_active Application Discontinuation
- 1999-07-29 US US09/600,503 patent/US6435429B1/en not_active Expired - Fee Related
- 1999-07-29 KR KR1020007007767A patent/KR20010034147A/ko not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2165308A (en) * | 1984-10-09 | 1986-04-09 | Diesel Kiki Co | Fuel injection nozzle for internal combustion engines |
DE4115457A1 (de) * | 1990-05-17 | 1991-11-21 | Avl Verbrennungskraft Messtech | Einspritzduese fuer eine brennkraftmaschine |
DE4023828A1 (de) * | 1990-07-27 | 1992-01-30 | Bosch Gmbh Robert | Verfahren zur einstellung eines ventils und ventil |
DE19626576A1 (de) * | 1996-07-02 | 1998-01-08 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19712589C1 (de) * | 1997-03-26 | 1998-06-04 | Bosch Gmbh Robert | Brennstoffeinspritzventil und Verfahren zur Herstellung einer Ventilnadel eines Brennstoffeinspritzventils |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005504216A (ja) * | 2001-09-05 | 2005-02-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 燃料噴射弁 |
Also Published As
Publication number | Publication date |
---|---|
EP1047870A1 (de) | 2000-11-02 |
DE19853091A1 (de) | 2000-05-25 |
JP2002530567A (ja) | 2002-09-17 |
EP1047870B1 (de) | 2003-06-18 |
CZ293800B6 (cs) | 2004-08-18 |
DE59905997D1 (de) | 2003-07-24 |
CZ20002626A3 (en) | 2001-05-16 |
KR20010034147A (ko) | 2001-04-25 |
US6435429B1 (en) | 2002-08-20 |
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