EP1431569A2 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1431569A2 EP1431569A2 EP03015166A EP03015166A EP1431569A2 EP 1431569 A2 EP1431569 A2 EP 1431569A2 EP 03015166 A EP03015166 A EP 03015166A EP 03015166 A EP03015166 A EP 03015166A EP 1431569 A2 EP1431569 A2 EP 1431569A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- actuator
- fuel injection
- valve needle
- 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 description 38
- 239000012528 membrane Substances 0.000 claims abstract description 44
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 210000004379 membrane Anatomy 0.000 description 34
- 239000007921 spray Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 239000007787 solid 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
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
-
- 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
- F02M61/166—Selection of particular materials
Definitions
- the invention is based on a fuel injector according to the genus of the main claim.
- Fuel injector with a piezoelectric or known magnetostrictive actuator which is in operative connection with a valve needle.
- the valve needle points to her spray-side end on a valve closing body with a valve seat surface cooperates to form a sealing seat.
- the actuator is movable in one with a first end spherical recesses of an upper stop and stored acts with its movable in a spherical recess engaging second end via a transmission module the valve needle.
- the two in the spherical Recesses, spherical segment-shaped ends of the Actuator same centering errors and bumps on the Surfaces of the ends of the actuator.
- a disadvantage of that from the above publication known fuel injector is in particular the elaborate production of the two spherical segment-shaped Ends trained actuator and the receiving devices these ends in the fuel injector.
- the ends of the spherical segment must be expensive and the actuator strength-reducing machined or the actuator must have a correspondingly designed holding body, in which it is stored.
- the additional Holding body increases the manufacturing and assembly costs.
- the membrane is made of metal, especially made of steel.
- the elasticity Flexibility, the temperature resistance and the Joining properties can be positively influenced.
- the membrane is perforated train. This makes it u. a. possible that the Valve needle can reach through the membrane. Grab the Valve needle through the membrane, making it a simple one and compact design of the fuel injector in easily possible.
- the membrane has at least one Has opening. Through the opening can also Flexibility and elasticity of the membrane can be influenced. It also enables the membrane of Relieve pressure loads from adjacent fuel because the fuel flow through the at least one opening can.
- the membrane on your Inner circumference with the valve needle and on its outer circumference with the housing cohesively, especially by welding or laser welding to be hermetically sealed.
- the membrane can thereby in particular also have a sealing effect For example, to keep fuel away from the actuator.
- the membrane is advantageous to attach the membrane to your Inner circumference with the valve needle and on its outer circumference with to form-fit the housing.
- the membrane can be installed particularly easily and advantageously.
- the membrane on its inner circumference the valve needle cohesively, especially by welding or laser welding, and form-fitting on its outer circumference to join with the case.
- the membrane can thus with the Valve needle to be particularly firmly connected and at the same time, for example together with the valve needle, mounted particularly easily in the fuel injector become.
- Fuel injector 1 is used especially for direct injection of fuel into a combustion chamber of a mixture-compressing, spark-ignited Internal combustion engine.
- a cylindrical housing 2 In a cylindrical housing 2 is one Compensating device 5, an actuator 4, a valve needle 3, a spring element 6 and a membrane 8 are arranged.
- the piston-shaped actuator 4 which preferably does not come from closer illustrated, disk-shaped piezoelectric or magnetostrictive elements is built between the Valve needle 3 and the compensation device 5 arranged.
- the compensation device 5 serves to compensate for thermal changes in length of the actuator 4.
- the actuator 4 has a first end 12 and a second end 13 that run parallel to each other.
- the first end 12 of the actuator 4 is on the flat side facing it Compensating device 5, with the opposite, spherical segment-shaped side of the Compensating device 5 in at the far end of the Housing 2 arranged bearing 7 engages.
- bearing 7 can spherical segment-shaped side of the compensating device 5 slide.
- the valve needle 3 is located with its plan end on the second end 13 and is through that under constant bias spring element 6, which on the one hand on the compensation device 5 and on the other hand is attached to the valve needle 3, in constant contact held.
- the spring element 6 is formed spirally and radially surrounds the actuator 4.
- the valve needle 3 passes through the perforated disc-shaped and coaxial arranged membrane 8.
- the perforated disc-shaped membrane 8 in cross section half-shell-shaped, d. that is, the closed Course of the membrane 8 throughout half-shell is formed and thus in the cross section of the membrane 8 show two half-shell-shaped designs.
- the membrane 8 is made of steel. Because of their flexibility and elasticity the membrane 8 guides the valve needle 3 axially, the actuator 4, which with the valve needle 3 in frictional engagement and Form fit is, is also performed.
- the membrane 8 cohesively by laser welding using a Weld 10 on the inner circumference of the valve needle 3 and Outer periphery on the housing 2 hermetically sealed. The Membrane 8 thus sealed the actuator 4 from fuel, which flows on the spray side.
- valve closing body designed with a not shown valve seat surface to a sealing seat interacts.
- a valve seat body not shown is at least one spray opening, not shown educated.
- the fuel is on the side in Housing 2 trained fuel supply, not shown fed and led to the sealing seat.
- the piezoelectric actuator 4 does not have a shown electronic control unit and one An electrical excitation voltage is supplied to the plug contact, expand the disc-shaped, not shown piezoelectric elements of the actuator 4 against the Preload of the spring element 6 and one not bias spring shown and move the valve needle 3 in the spray direction, which causes fuel in a known manner is hosed.
- Fig. 2 shows a partial schematic representation a second embodiment of an inventive Fuel injection valve 1 in the area of the membrane 8, similar to the first embodiment of Fig. 1.
- the membrane 8 has a plurality of openings 11 and is on Outer periphery connected to the housing 2 by positive locking.
- the outer periphery of the membrane 8, which by the Half-shell shape to spray openings, not shown is inclined, is supported on a shoulder 9.
- the Shoulder 9 is due to an inner diameter reduction in the Housing 2 realized.
- the outer circumference of the Membrane 8 on the shoulder 9 The outer circumference of the membrane 8 can also not by shown recesses in the inner circumference of the housing 2nd positively realized in both axial directions become.
- the openings 11 are used in particular to relieve the pressure Membrane 8, so that the existing on the spray side pressurized fuel the membrane 8 for example does not release from the positive connection.
- the invention is not shown on the Embodiments limited and z. B. also for after internal fuel injectors can be used.
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
- Fig. 1
- eine schematische axiale Schnittdarstellung durch ein erstes Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils und
- Fig. 2
- eine ausschnittsweise schematische Darstellung eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich der Membran.
- 1
- Brennstoffeinspritzventil
- 2
- Gehäuse
- 3
- Ventilnadel
- 4
- Aktor
- 5
- Ausgleichseinrichtung
- 6
- Federelement
- 7
- Lagerschale
- 8
- Membran
- 9
- Schulter
- 10
- Schweißnaht
- 11
- Öffnung
- 12
- erstes Ende
- 13
- zweites Ende
Claims (10)
- Brennstoffeinspritzventil (1), insbesondere zum direkten Einspritzen von Brennstoff in einen Brennraum einer Brennkraftmaschine, mit einem piezoelektrischen, elektrostriktiven oder magnetostrikiven Aktor (4), und einer mit dem Aktor (4) in Wirkverbindung stehenden Ventilnadel (3), welche einen Ventilschließkörper aufweist, der mit einer Ventilsitzfläche zu einem Dichtsitz zusammenwirkt, wobei der Aktor (4) mittel- oder unmittelbar mit einem ersten Ende (12) beweglich gelagert ist und das andere zweite Ende (13) auf die Ventilnadel (3) einwirkt,
dadurch gekennzeichnet, daß das zweite Ende (13) des Aktors (4) mittel- oder unmittelbar durch eine elastische und flexible Membran (8) axial geführt ist. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß die Membran (8) aus Metall, insbesondere aus Stahl, besteht. - Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Membran (8) lochscheibenförmig ausgebildet ist. - Brennstoffeinspritzventil nach Anspruch 3,
dadurch gekennzeichnet, daß die Ventilnadel (3) durch die Membran (8) greift. - Brennstoffeinspritzventil nach Anspruch 3 oder 4,
dadurch gekennzeichnet, daß die Membran (8) im Querschnitt halbschalenförmig ausgebildet ist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Membran (8) zumindest eine Öffnung (11) aufweist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Membran (8) an ihrem Innenumfang mit der Ventilnadel (3) und an ihrem Außenumfang mit einem Gehäuse (2) stoffschlüssig, insbesondere durch Schweißen bzw. Laserschweißen, hermetisch dicht gefügt ist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Membran (8) an ihrem Innenumfang mit der Ventilnadel (3) und an ihrem Außenumfang mit einem Gehäuse (2) formschlüssig gefügt ist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Membran (8) an ihrem Innenumfang mit der Ventilnadel (3) hermetisch dicht und stoffschlüssig, insbesondere durch Schweißen oder Laserschweißen, und an ihrem Außenumfang formschlüssig mit einem Gehäuse (2) gefügt ist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Membran (8) die Ventilnadel (20) wenigstens teilweise axial führt und somit mittelbar das zweite Ende (13) des Aktors (4) axial führt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10259800 | 2002-12-19 | ||
DE2002159800 DE10259800A1 (de) | 2002-12-19 | 2002-12-19 | Brennstoffeinspritzventil |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1431569A2 true EP1431569A2 (de) | 2004-06-23 |
EP1431569A3 EP1431569A3 (de) | 2005-11-30 |
EP1431569B1 EP1431569B1 (de) | 2009-09-23 |
Family
ID=32336492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030015166 Expired - Lifetime EP1431569B1 (de) | 2002-12-19 | 2003-07-04 | Brennstoffeinspritzventil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1431569B1 (de) |
DE (2) | DE10259800A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017060285A1 (de) * | 2015-10-09 | 2017-04-13 | Continental Automotive Gmbh | Fluid-einspritzvorrichtung für brennkraftmaschinen |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19708304A1 (de) | 1997-02-28 | 1998-09-10 | Siemens Ag | Vorrichtung zur Übertragung einer Bewegung und Einspritzventil mit einer Vorrichtung zur Übertragung einer Bewegung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2936425A1 (de) * | 1979-09-08 | 1981-04-02 | Robert Bosch Gmbh, 7000 Stuttgart | Elektromagnetisch betaetigbares kraftsoffeinspritzventil |
DE4005455A1 (de) * | 1989-02-28 | 1990-08-30 | Volkswagen Ag | Zumessventil, insbesondere kraftstoff-einspritzventil fuer eine brennkraftmaschine |
DE19928916B4 (de) * | 1999-06-24 | 2017-12-14 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
EP1170500A1 (de) * | 2000-07-03 | 2002-01-09 | Med S.p.A. | Kraftstoffeinspritzventil für Verbrennungsmotor |
DE10046661A1 (de) * | 2000-09-20 | 2002-04-04 | Bosch Gmbh Robert | Piezoaktor |
-
2002
- 2002-12-19 DE DE2002159800 patent/DE10259800A1/de not_active Withdrawn
-
2003
- 2003-07-04 EP EP20030015166 patent/EP1431569B1/de not_active Expired - Lifetime
- 2003-07-04 DE DE50311942T patent/DE50311942D1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19708304A1 (de) | 1997-02-28 | 1998-09-10 | Siemens Ag | Vorrichtung zur Übertragung einer Bewegung und Einspritzventil mit einer Vorrichtung zur Übertragung einer Bewegung |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017060285A1 (de) * | 2015-10-09 | 2017-04-13 | Continental Automotive Gmbh | Fluid-einspritzvorrichtung für brennkraftmaschinen |
CN108138734A (zh) * | 2015-10-09 | 2018-06-08 | 大陆汽车有限公司 | 用于内燃机的流体喷射装置 |
US10570864B2 (en) | 2015-10-09 | 2020-02-25 | Continental Automotive Gmbh | Fluid-injection device for internal combustion engines |
Also Published As
Publication number | Publication date |
---|---|
DE10259800A1 (de) | 2004-07-01 |
EP1431569B1 (de) | 2009-09-23 |
EP1431569A3 (de) | 2005-11-30 |
DE50311942D1 (de) | 2009-11-05 |
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