EP1114251A1 - Brennstoffeinspritzventil - Google Patents
BrennstoffeinspritzventilInfo
- Publication number
- EP1114251A1 EP1114251A1 EP00952923A EP00952923A EP1114251A1 EP 1114251 A1 EP1114251 A1 EP 1114251A1 EP 00952923 A EP00952923 A EP 00952923A EP 00952923 A EP00952923 A EP 00952923A EP 1114251 A1 EP1114251 A1 EP 1114251A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- housing
- valve
- fuel injection
- injection valve
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 73
- 238000002347 injection Methods 0.000 title claims abstract description 33
- 239000007924 injection Substances 0.000 title claims abstract description 33
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 3
- 230000003716 rejuvenation Effects 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 11
- 239000012528 membrane Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- 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
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- the fuel injector resulting from this document has a piezoelectric actuator and a valve closing body which can be actuated by means of a valve needle and which cooperates with a valve seat surface to form a sealing seat.
- the actuator is arranged on the end of the fuel injection valve facing away from the injection side and is sealed via a spring membrane extending over the cross section of the fuel injection valve against a fuel introduced laterally and in the spraying direction below the spring membrane.
- the spring membrane therefore divides the fuel injector into a fuel-filled spray-side section and a fuel-sealed section in which the actuator is located.
- the sealed section of the fuel injector has an electrical connection via which an electrical feed line is guided to the actuator.
- the electrical connection is plugged into a hole in the side of the valve housing of the fuel injector.
- a disadvantage of the fuel injector known from DE 40 05 455 AI is that the fuel can only be introduced into the fuel injector via a fuel inlet connection which is attached to the side of the valve housing and is located in the spray direction below the spring membrane. In particular, the fuel cannot be introduced into the fuel injection valve via the end of the valve housing opposite the injection side. The disadvantageous position of the fuel inlet connector increases both the length and the diameter of the fuel injector.
- the actuator does not resist substances penetrating through the joint between the valve housing and the electrical connection, such as, for. B. leak oil and fuel is protected.
- the connection of the electrical connection to an electrical contact of the actuator is complex, since the actuator is introduced into the valve housing through an opening at the end and the electrical connections are guided laterally to the actuator.
- the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the actuator is completely sealed, which seal is suitable for any fuel injectors and also an electrical supply line of the actuator can be easily connected to an electrical connection.
- the electrical feed line is advantageously designed as a contact tab angled on the actuator. Reliable electrical contacting on the actuator is thereby achieved, and an electrical connection can be provided at the same time by the electrical supply line.
- the filling element is a hardened filling compound or an elastic solid.
- the filling element can be introduced into the through opening in a simple manner, adapting to the special shape of the through opening.
- the fuel injector has a plastic sheathing which covers the filling element of the through opening. This provides further protection of the through opening and of the filling element filling the through opening, in particular against mechanical stress, the plastic sheathing being able to form an electrical connection with the electrical supply line.
- valve housing and the actuator housing tapers continuously in the edge region of the through opening toward the through opening.
- the valve housing and the actuator housing are bent toward one another, the cutouts of the valve housing and the actuator housing directly adjoining one another, so that the sealing is simplified in terms of production technology.
- valve housing has an inwardly bent outer surface to form the continuously tapering intermediate space in the area of at least one recess in the valve housing.
- the valve housing is advantageously connected to the actuator housing by at least one recess in the valve housing with a circumferential weld seam. This provides a reliable positive and material connection, which enables aging-resistant and long-term stable sealing and fastening.
- Figure 1 shows a first embodiment of the fuel injector according to the invention.
- FIG. 2 shows the section designated II in FIG. 1;
- FIG. 3 shows the section designated III in FIG. 2;
- Fig. 5 shows another embodiment of the fuel injector according to the invention.
- FIG. 1 shows a fuel injection valve 1 according to the invention in an excerpted axial sectional view, the detail II in FIG. 2 being shown again enlarged.
- the fuel injection valve 1 is used in particular for the direct injection of fuel, in particular gasoline, into a combustion chamber mixture-compressing, spark-ignition internal combustion engine as a so-called gasoline direct injection valve.
- the fuel injector 1 according to the invention is also suitable for other applications.
- the fuel injection valve 1 has a valve housing 2 and a fuel inlet connection 3 connected to the valve housing 2.
- a valve seat body 4 connected to the valve housing 2
- a valve seat surface 5 is formed, which cooperates with a valve closing body 7 which can be actuated by a valve needle 6 to form a sealing seat.
- the valve closing body 7 is formed in one piece with the valve needle 6, the valve needle 6 having a section 8 with a reduced diameter.
- the valve needle 6 is guided by valve needle guides 9 and 10 in the axial direction with respect to the valve axis 11.
- the valve needle guides 9, 10 have recesses 12a, 12b; 13a, 13b.
- a piezoelectric or magnetostrictive actuator 16 surrounded by an actuator housing 15 which bears on an upper end face 17 against a pressure plate 18 of the actuator housing 15.
- the actuator 16 bears on a lower end face 19 against a pressure plate 20 which is connected to the valve needle 6.
- the pressure plate 18 is connected to an actuator pot 22 of the actuator housing 15 via a circumferential weld seam 21.
- a tubular intermediate space 23 is formed between the actuator cup 22 and the valve housing 2, via which the fuel is conducted from the fuel inlet connection 3 in the direction of the sealing seat formed from the valve closing body 7 and the valve seat surface 5.
- the actuator pot 22 has a section 24 with a reduced diameter at its spray-side end. A cutout is formed on section 24, through which the valve needle 6 protrudes. An actuator chamber 25 is sealed against the fuel in the tubular intermediate space 23 by means of a seal 26, which can be designed in particular as an elastomer seal.
- the actuator 16 is biased by a compression spring 30, which is supported on an inner surface 31 of the actuator cup 22 and the pressure plate 20.
- the actuator housing 15 is supported on the fuel inlet connection 3 via an annular support element 32.
- the support element 32 has cutouts 33a, 33b.
- the actuator 16 is subjected to an electrical voltage, causing it to expand and act on the valve needle 6 via the pressure plate 20, whereby the valve closing body 7 lifts off the valve seat surface 5 of the valve seat body 4 and the fuel z. B. is injected via swirl grooves 34 formed on the valve needle 6 from the fuel injector 1.
- the actuator 16 is connected at an electrical contact 35 to an angled end of an electrical feed line 37.
- the electrical feed line 37 can be designed as a contact tab.
- the connection of the angled end 36 to the electrical contact 35 can be provided via a solder connection.
- the actuator pot 15 and the valve housing 2 have mutually adjacent cutouts 38, 39 (FIG. 2) through which the electrical feed line 37 projects.
- the valve housing 2 is connected to the actuator housing 15 in an edge region 40 of the cutouts 38, 39, as a result of which a through opening 41 sealed against the fuel is formed.
- the valve housing 2 is fastened to the actuator housing 15 by a circumferential weld seam 42.
- the through opening 41 is filled with a filler element 43, the electrical supply line 37 is fixed and supported by the filling element 43 in the through opening 41.
- the filling element 43 can be provided by several materials. It is advantageous if the filling element 43 is given by a hardening filling compound, since the filling compound can be injected into the through opening 41 and it thus adapts to the through opening 41 and the electrical feed line 37, so that the filling element 43 also after the filling compound has hardened in the case of a structurally different manufacture of the through opening 41 reliably seals the actuator 16. Another possibility is that the filler element 43 is designed as an elastic solid, in particular as a plastic ring, which has at least one recess, so that the filler element 43 can be introduced into the through opening 41 even when the angled end 36 is already soldered to the actuator 16.
- the actuator 16 is completely sealed in the actuator housing 15 by the filler element 43, so that substances present in particular outside the valve housing 2 of the fuel injector 1, in particular leak liquids, cannot penetrate the actuator 16.
- valve housing 2 and the fuel inlet connector 3 are at least partially enclosed with a plastic jacket 44, the plastic jacket 44 also extending over the opening 41 to protect it so that the filler element 43 is covered by the plastic sheath 44.
- the electrical feed line 37 extends into a connection element 45, which is part of the plastic casing 44, as a result of which an electrical connection plug is formed.
- An intermediate space 50 is formed between the valve housing 2 and the actuator housing 15, which extends in the edge region 40 of the through opening 41 towards the through opening 41 continuously rejuvenated.
- the valve housing 2 has an inwardly bent outer surface 46 to form the continuously tapering intermediate space 50 in the region of the recess 38 of the valve housing 2. In the edge region of the passage opening 41, the valve housing 2 therefore bears against the actuator housing 15, these being connected to one another with the weld seam 42.
- FIG. 3 shows a section along the section line designated III in FIG. 2. Corresponding elements are provided with the same reference symbols in all the figures.
- the electrical lead 37 has two electr. Contacts 37a, 37b, which are guided through the through opening 41. To fix the electrical lead 37 of the actuator 16, the through opening 41 is filled with the filler 43. As a result, the connection of the electrical supply line 37 to the actuator 16 is mechanically relieved.
- the electrical feed line 37 can be guided to the actuator 16 without its own electrical insulation if an electrically insulating filler element 43 is used to fill the through opening 41, since the two contacts 37a, 37b of the electrical feed line 37 are reliably insulated from one another.
- the through-opening 41 is also closed by the filling element 43, so that penetration of substances, in particular liquids such as water, gasoline and leakage oil, is prevented.
- valve housing 2 has a further cutout 51.
- the valve housing 2 is bent to form a continuously tapering intermediate space 52 in the region of the further recess 51 of the valve housing 2 towards the actuator housing 15, so that the valve housing 2 has an inwardly bent lateral surface 53 in the edge region of the further recess 51.
- the valve housing 2 which is bent inwards in the edge region of the recess 51 is connected to the actuator housing 15.
- the actuator housing 15 is connected to the valve housing 2 both via the circumferential weld seam 42 and via the circumferential weld seam 54.
- the actuator housing 15 can be connected to the valve housing 2 at further points.
- the actuator housing 15 can also have support elements, such as. B. the support element 32 in FIGS. 1 and 2, which can also be arranged in the tubular space 23, may be supported on the valve housing 2.
- the actuator 16 By fastening the actuator housing 15 with the valve housing 2 via the two weld seams 42 and 54, the actuator 16 can be easily fixed in the fuel injector 1, the valve needle 8 being easily adjusted by attaching the weld seams 42, 54 can.
- the deformation of the actuator housing 2 in the edge region of the through opening 41 or in the edge region of the recess 51 can be achieved by cold forming, so that the production can also be carried out inexpensively.
- FIG 5 shows a further exemplary embodiment of the fuel injection valve according to the invention.
- the electrical feed line 37a, 37b is fixed in the region 60 with the filler element 43 in a through opening 41, not shown.
- the electrical supply line 37a, 37b is also surrounded outside the region 60 of the through opening 41 with the filler element 43, so that the electrical supply line 37a, 37b is also fixed outside the region 60, that is in a region 61, by the filler element 43.
- This is particularly advantageous if high mechanical loads on the feed lines 37a, 37b to the actuator 16 are to be expected, as they occur e.g. B. occur when the fuel Injection valve 1, after the filling element 43 has been introduced, is provided with a plastic sheath which at least partially surrounds the feed line 37a, 37b.
- the ends 62a, 62b of the electrical feed line 37a, 37b are fixed in a defined position, so that an electrical connection is advantageously provided by the extrusion coating 44 and the ends 62a, 62b.
- the invention is not restricted to the exemplary embodiments described.
- the invention is also suitable for an internal fuel injector 1.
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
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19932760A DE19932760A1 (de) | 1999-07-14 | 1999-07-14 | Brennstoffeinspritzventil |
DE19932760 | 1999-07-14 | ||
PCT/DE2000/002279 WO2001006115A1 (de) | 1999-07-14 | 2000-07-13 | Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1114251A1 true EP1114251A1 (de) | 2001-07-11 |
EP1114251B1 EP1114251B1 (de) | 2005-01-26 |
Family
ID=7914647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00952923A Expired - Lifetime EP1114251B1 (de) | 1999-07-14 | 2000-07-13 | Brennstoffeinspritzventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US6474565B1 (de) |
EP (1) | EP1114251B1 (de) |
JP (1) | JP2003504560A (de) |
DE (2) | DE19932760A1 (de) |
WO (1) | WO2001006115A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007048496A1 (de) * | 2005-10-27 | 2007-05-03 | Daimler Ag | Kraftstoffinjektor für eine brennkraftmaschine |
DE102007047438A1 (de) * | 2007-10-04 | 2009-04-16 | Doka Industrie Gmbh | Schalungsanordnung für den Freivorbau von Brücken |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6543700B2 (en) * | 2000-12-11 | 2003-04-08 | Kimberly-Clark Worldwide, Inc. | Ultrasonic unitized fuel injector with ceramic valve body |
JP4841048B2 (ja) * | 2001-03-29 | 2011-12-21 | 京セラ株式会社 | アクチュエータ及び噴射装置 |
JP4889156B2 (ja) * | 2001-03-29 | 2012-03-07 | 京セラ株式会社 | アクチュエータ及び噴射装置 |
EP1511932B1 (de) * | 2002-04-04 | 2006-11-29 | Siemens Aktiengesellschaft | Einspritzventil |
DE10228353A1 (de) * | 2002-06-25 | 2004-01-15 | Daimlerchrysler Ag | Piezo-Sensors-System zur Detektion des Nadelhubs einer Einspritzdüse eines Common-Rail-Injektors |
EP1391607A1 (de) * | 2002-08-20 | 2004-02-25 | Siemens VDO Automotive S.p.A. | Dosiergerät |
DE10259799A1 (de) * | 2002-12-19 | 2004-07-29 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
EP1445471B1 (de) * | 2003-01-24 | 2006-05-17 | Siemens VDO Automotive S.p.A. | Elektrischer Anschlussadapter und Dosiergerät mit einem solchen Anschluss |
DE10310789A1 (de) * | 2003-03-12 | 2004-09-23 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
JP2006057620A (ja) * | 2004-07-20 | 2006-03-02 | Aisan Ind Co Ltd | 燃料噴射弁及び燃料噴射弁のシール方法 |
US7520269B2 (en) * | 2005-06-28 | 2009-04-21 | Advanced Global Equities And Intellectual Properties | Fuel injector nozzle assembly |
FR2888889B1 (fr) * | 2005-07-20 | 2007-08-31 | Renault Sas | Dispositif d'injection de carburant pour moteur a combustion interne |
DE102005050784A1 (de) * | 2005-10-24 | 2007-04-26 | Robert Bosch Gmbh | Kraftstoffeinspritzventile für Brennkraftmaschinen |
FR2895031B1 (fr) * | 2005-12-19 | 2011-06-03 | Renault Sas | Injecteur de carburant pour moteur a combustion interne |
DE502006007633D1 (de) * | 2006-05-09 | 2010-09-23 | Continental Automotive Gmbh | Kraftstoffeinspritzsystem und ein Verfahren zum Herstellen dieses Einspritzsystems |
EP1876349B1 (de) * | 2006-07-07 | 2016-05-18 | Continental Automotive GmbH | Verfahren zur Kalibrierung von Einspritzventil |
DE602006005809D1 (de) * | 2006-07-25 | 2009-04-30 | Continental Automotive Gmbh | Piezoaktoreinheit für ein Einspritzventil |
WO2008040796A1 (de) * | 2006-10-06 | 2008-04-10 | Continental Automotive Gmbh | Verfahren zum herstellen eines injektors und injektor |
DE102009034099A1 (de) | 2009-07-21 | 2011-01-27 | Epcos Ag | Piezoaktor mit elektrischer Kontaktierung |
DE102012203607A1 (de) * | 2012-03-07 | 2013-09-12 | Robert Bosch Gmbh | Ventil zum Zumessen eines Fluids |
CN102641545B (zh) * | 2012-05-08 | 2013-04-17 | 浙江康康医疗器械有限公司 | 能够自动组装一次性输液器的调速器壳与导管的装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3194162A (en) * | 1962-11-15 | 1965-07-13 | Clevite Corp | Piezoelectric fuel injector |
JPS57136859U (de) * | 1981-02-18 | 1982-08-26 | ||
JPS60104762A (ja) * | 1983-11-10 | 1985-06-10 | Nippon Soken Inc | 電歪式アクチュエータ及びそれを用いた燃料噴射弁 |
DE3533085A1 (de) * | 1985-09-17 | 1987-03-26 | Bosch Gmbh Robert | Zumessventil zur dosierung von fluessigkeiten oder gasen |
DE4005455A1 (de) * | 1989-02-28 | 1990-08-30 | Volkswagen Ag | Zumessventil, insbesondere kraftstoff-einspritzventil fuer eine brennkraftmaschine |
EP0937891B1 (de) * | 1998-02-19 | 2003-10-01 | Delphi Technologies, Inc. | Kraftstoffeinspritzventil |
DE19919313B4 (de) * | 1999-04-28 | 2013-12-12 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
-
1999
- 1999-07-14 DE DE19932760A patent/DE19932760A1/de not_active Withdrawn
-
2000
- 2000-07-13 US US09/787,141 patent/US6474565B1/en not_active Expired - Fee Related
- 2000-07-13 EP EP00952923A patent/EP1114251B1/de not_active Expired - Lifetime
- 2000-07-13 WO PCT/DE2000/002279 patent/WO2001006115A1/de active IP Right Grant
- 2000-07-13 DE DE50009353T patent/DE50009353D1/de not_active Expired - Lifetime
- 2000-07-13 JP JP2001510722A patent/JP2003504560A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0106115A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007048496A1 (de) * | 2005-10-27 | 2007-05-03 | Daimler Ag | Kraftstoffinjektor für eine brennkraftmaschine |
DE102007047438A1 (de) * | 2007-10-04 | 2009-04-16 | Doka Industrie Gmbh | Schalungsanordnung für den Freivorbau von Brücken |
Also Published As
Publication number | Publication date |
---|---|
WO2001006115A1 (de) | 2001-01-25 |
DE19932760A1 (de) | 2001-01-18 |
JP2003504560A (ja) | 2003-02-04 |
EP1114251B1 (de) | 2005-01-26 |
DE50009353D1 (de) | 2005-03-03 |
US6474565B1 (en) | 2002-11-05 |
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