DE10357454A1 - Fuel injector - Google Patents
Fuel injector Download PDFInfo
- Publication number
- DE10357454A1 DE10357454A1 DE2003157454 DE10357454A DE10357454A1 DE 10357454 A1 DE10357454 A1 DE 10357454A1 DE 2003157454 DE2003157454 DE 2003157454 DE 10357454 A DE10357454 A DE 10357454A DE 10357454 A1 DE10357454 A1 DE 10357454A1
- Authority
- DE
- Germany
- Prior art keywords
- fuel injection
- injection valve
- valve according
- coupler
- recess
- 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.)
- Withdrawn
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 57
- 238000002347 injection Methods 0.000 claims abstract description 40
- 239000007924 injection Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 229920002449 FKM Polymers 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003860 storage Methods 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
- 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
- F02M61/08—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 the valves opening in direction of fuel flow
-
- 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
-
- 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
- F02M61/167—Means for compensating clearance or thermal expansion
-
- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- 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
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
- F02M2200/707—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms
Abstract
Ein Brennstoffeinspritzventil (1) weist einen piezoelektrischen oder magnetostriktiven Aktor (4), einen Ventilschließkörper (17), der mit einer Ventilsitzfläche (18) zu einem Dichtsitz zusammenwirkt, und einen hydraulischen Koppler (7) auf. Der Koppler (7) weist einen Geberkolben (9), einen Nehmerkolben (10) und ein dazwischen ausgebildetes Kopplervolumen (23) auf, wobei das Kopplervolumen (23) über eine Drossel (24) mit einem Ausgleichsraum (12) verbunden ist. Ein flexibler Abschnitt (13) begrenzt den Ausgleichsraum (12) zumindest teilweise. Der Ausgleichsraum (12), das Kopplervolumen (23) und die Drossel (24) sind mit einem Hydraulikmedium gefüllt. Der flexible Abschnitt (13) ist elastisch, weist einen im wesentlichen U-förmigen Durchmessereinzug (33) auf und beaufschlagt durch sein elastisches Verhalten das Hydraulikmedium mit einem Druck.One Fuel injection valve (1) has a piezoelectric or magnetostrictive actuator (4), a valve closing body (17) provided with a valve seat surface (18) to a sealing seat, and a hydraulic coupler (7). The coupler (7) has a master piston (9), a slave piston (10) and a coupler volume (23) formed therebetween, wherein the coupler volume (23) over a throttle (24) is connected to a compensation chamber (12). One flexible portion (13) limits the compensation space (12) at least partially. The compensation chamber (12), the coupler volume (23) and the throttle (24) are filled with a hydraulic medium. The flexible one Section (13) is elastic, has a substantially U-shaped diameter feed (33) and applied by its elastic behavior of the hydraulic medium with a pressure.
Description
Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs.The The invention is based on a fuel injection valve after Genus of the main claim.
Aus
der
Im Geberzylinder ist ein Nehmerkolben geführt, der den Geberzylinder ebenfalls abschließt und hierdurch die Hydraulikkammer bildet. In der Hydraulikkammer ist eine Feder angeordnet, die den Geberzylinder und den Nehmerkolben auseinanderdrückt. Wenn der Aktor auf den Geberzylinder eine Hubbewegung überträgt, wird diese Hubbewegung durch den Druck eines Hydraulikfluids in der Hydraulikkammer auf den Nehmerkolben übertragen, da das Hydraulikfluid in der Hydraulikkammer sich nicht zusammenpressen läßt und nur ein geringer Anteil des Hydraulikfluids durch den Ringspalt während des kurzen Zeitraumes eines Hubes entweichen kann. In der Ruhephase, wenn der Aktor keine Druckkraft auf den Geberzylinder ausübt, wird durch die Feder der Nehmerkolben aus dem Zylinder herausgedrückt und durch den entstehenden Unterdruck dringt über den Ringspalt das Hydraulikfluid in den Hydraulikraum ein und füllt diesen wieder auf. Dadurch stellt sich der hydraulische Koppler automatisch auf Längenausdehnungen und druckbedingte Dehnungen eines Brennstoffeinspritzventils ein. Die Abdichtung des Hydraulikmediums erfolgt über Dichtringe.in the Master cylinder is a slave piston, which is the master cylinder also completes and thereby forms the hydraulic chamber. In the hydraulic chamber a spring is arranged, which covers the master cylinder and the slave piston presses apart. If the actuator transmits to the master cylinder a lifting movement is this lifting movement by the pressure of a hydraulic fluid in the hydraulic chamber transferred to the slave piston, because the hydraulic fluid in the hydraulic chamber do not compress lets and only a small proportion of the hydraulic fluid through the annular gap during the short period of a stroke can escape. In the resting phase, if the actuator exerts no pressure force on the master cylinder is pushed out by the spring of the slave piston from the cylinder and through The resulting negative pressure penetrates the hydraulic fluid via the annular gap in the hydraulic room and fills this again. This raises the hydraulic coupler automatically to length expansions and pressure induced strains of a fuel injector. The sealing of the hydraulic medium takes place via sealing rings.
Aus dem Stand der Technik sind außerdem Brennstoffeinspritzventile bekannt, die mit wellrohr- bzw. wellbalgförmigen Dichtungen Hydraulikmedium abdichten.Out The prior art also includes fuel injectors known, which seal with Wellrohr- or bellows-shaped seals hydraulic medium.
Nachteilig an diesem bekannten Stand der Technik ist, daß eine Leckage durch Dichtringe nicht vollständig vermieden werden kann und die Brennstoffeinspritzventile dadurch eine geringere Lebensdauer haben. Die Abdichtung durch Wellrohrdichtungen erhöht die Menge an Hydraulikmedium stark und damit das temperaturabhängige Verhalten des Kopplers. Außerdem ist die Baugröße und der Herstellungsaufwand erhöht.adversely in this known prior art is that leakage through sealing rings not completely can be avoided and the fuel injection valves thereby have a shorter life. The seal by corrugated tube seals elevated the amount of hydraulic medium strong and thus the temperature-dependent behavior of the coupler. Furthermore is the size and the Production costs increased.
Vorteile der ErfindungAdvantages of invention
Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß das Hydraulikmedium des Kopplers dauerhaft abgedichtet wird und der Bauraum sowie der Herstellungsaufwand vermindert sind.The Fuel injection valve according to the invention with the characterizing features of the main claim has the Advantage that that Hydraulic medium of the coupler is permanently sealed and the Installation space and the production costs are reduced.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterentwicklungen des im Hauptanspruch angegebenen Brennstoffeinspritzventils möglich.By in the subclaims listed activities are advantageous developments of the specified in the main claim Fuel injection valve possible.
In einer ersten Weiterbildung greift bzw. ragt der Durchmessereinzug in eine Ausnehmung ein, wobei sich in einer weiteren Weiterbildung die Ausnehmung bei einem sich vergrößernden Kopplervolumen verkleinert. Dadurch kann der Koppler kompakt gebaut werden und die Vorspannung, mit der der flexible Abschnitt auf das Hydraulikmedium wirkt, vorteilhaft beeinflußt werden.In a first development engages or protrudes the diameter of entry in a recess, wherein in a further development the recess is reduced in size as the volume of the coupler increases. This allows the coupler to be made compact and the bias, with which the flexible section acts on the hydraulic medium, advantageous affected become.
Durch die Ausführung der Drossel als Bohrung und die Anordnung der Drossel in einer Drosselscheibe läßt sich die Drossel sehr einfach und kostengünstig herstellen.By execution the throttle as a bore and the formation of the throttle in a throttle disk let yourself make the throttle very easy and inexpensive.
Durch die Verbindung des Ausgleichsraum mit einer Kammer, die durch eine elastische Membran eine Vorspannung auf das Hydraulikmedium ausübt, kann das hydraulische Verhalten des Kopplers weiter vorteilhaft eingestellt werden.By the connection of the equalization chamber with a chamber through a elastic diaphragm exerts a bias on the hydraulic medium can the hydraulic behavior of the coupler set further advantageous become.
Durch die druckbehaftete Gasfüllung der durch die Membran vom Ausgleichsraum getrennten Aussparung der Kammer, kann das hydraulische Verhalten des Kopplers weiter vorteilhaft beeinflußt werden.By the pressurized gas filling the separated by the membrane from the expansion chamber recess of the Chamber, the hydraulic behavior of the coupler can be further advantageous to be influenced.
Zeichnungdrawing
Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:embodiments The invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Beschreibung der Ausführungsbeispieledescription the embodiments
Nachfolgend werden Ausführungsbeispiele der Erfindung beispielhaft beschrieben.following Be exemplary embodiments of Invention described by way of example.
Bevor
die Erfindung anhand bevorzugter Ausführungsformen näher beschrieben
wird, wird zum besseren Verständnis
ein Brennstoffeinspritzventil gemäß dem Stand der Technik in
seinen wesentlichen Bauteilen in den
Das
in
Das
Brennstoffeinspritzventil
Eine
detaillierte Beschreibung des Kopplers
Abströmseitig
des Aktorkopfes
Der
Düsenkörper
Hydraulische
Koppler
Der
Ausgleichsraum
Die
Befüllung
des Kopplers
Nachteilig
an der beschriebenen Bauform des Brennstoffeinspritzventils
Abhilfe
wird durch das im Folgenden beschriebene Ausführungsbeispiel eines erfindungsgemäß ausgestalteten
und als Zweitmediums-Koppler ausgeführten Kopplers
In
diesem Ausführungsbeispiel
besteht der Nehmerkolben
Zwischen
der Stufe
Ein
flexibler Abschnitt
Der
Nehmerkolben
Etwa
auf Höhe
des Übergangs
des Kanals
Über lange
Zeiträume
auf den Koppler
Die
Aussparungen
Die
Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt und
für beliebige Bauformen
von Brennstoffeinspritzventilen
Claims (19)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003157454 DE10357454A1 (en) | 2003-12-03 | 2003-12-03 | Fuel injector |
EP20040105050 EP1538331B1 (en) | 2003-12-03 | 2004-10-14 | Fuel injection valve |
DE200450003933 DE502004003933D1 (en) | 2003-12-03 | 2004-10-14 | Fuel injector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003157454 DE10357454A1 (en) | 2003-12-03 | 2003-12-03 | Fuel injector |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10357454A1 true DE10357454A1 (en) | 2005-07-07 |
Family
ID=34442509
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003157454 Withdrawn DE10357454A1 (en) | 2003-12-03 | 2003-12-03 | Fuel injector |
DE200450003933 Expired - Fee Related DE502004003933D1 (en) | 2003-12-03 | 2004-10-14 | Fuel injector |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200450003933 Expired - Fee Related DE502004003933D1 (en) | 2003-12-03 | 2004-10-14 | Fuel injector |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1538331B1 (en) |
DE (2) | DE10357454A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009080495A1 (en) | 2007-12-21 | 2009-07-02 | BSH Bosch und Siemens Hausgeräte GmbH | Ironing device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE602005005242T2 (en) * | 2004-04-26 | 2009-04-02 | Isuzu Motors Ltd. | Length compensation element and this containing fuel injection valve |
EP1780405B1 (en) * | 2005-10-26 | 2008-09-17 | Siemens Aktiengesellschaft | Injector, compensation device for the injector and pressure transferring device for the compensation device |
EP1813805A1 (en) * | 2006-01-27 | 2007-08-01 | Siemens VDO Automotive S.p.A. | Compensation assembly for an injector |
DE602006016296D1 (en) * | 2006-11-02 | 2010-09-30 | Continental Automotive Gmbh | Injector for dosing liquid |
EP2078846B1 (en) * | 2008-01-14 | 2014-12-03 | Continental Automotive GmbH | Actuator arrangement and injection valve |
DE102012202909A1 (en) * | 2012-02-27 | 2013-08-29 | Robert Bosch Gmbh | Valve for metering fluid |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4858439A (en) * | 1987-03-03 | 1989-08-22 | Toyota Jidosha Kabushiki Kaisha | Device for varying a stroke |
EP0477400A1 (en) * | 1990-09-25 | 1992-04-01 | Siemens Aktiengesellschaft | Device for compensating the tolerance in the lift direction of the displacement transformer of a piezoelectric actuator |
DE19962177A1 (en) * | 1999-12-22 | 2001-07-12 | Siemens Ag | Hydraulic device for transmitting an actuator movement |
DE10159749A1 (en) * | 2001-12-05 | 2003-06-12 | Bosch Gmbh Robert | Fuel injection valve for an internal combustion engine comprises a pressure space which contains a hydraulic fluid and, by means of sealing units, is separated from the actuator and fuel spaces |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993006625A1 (en) * | 1991-09-27 | 1993-04-01 | Siemens Aktiengesellschaft | Hydraulic displacement transformer for the piezoelectric actuator of an inlet valve |
EP1325225B1 (en) * | 2000-10-11 | 2007-08-08 | Siemens VDO Automotive Corporation | Compensator assembly for a fuel injector |
DE10148594A1 (en) * | 2001-10-02 | 2003-04-10 | Bosch Gmbh Robert | Fuel injection valve has corrugated tube around guide sleeve with sealed connections to pistons that seals storage chamber for hydraulic fluid with respect to enclosing fuel chamber |
DE10149914A1 (en) * | 2001-10-10 | 2003-04-24 | Bosch Gmbh Robert | Fuel injection valve consists of an actuator located in a housing connected on the side of a valve needle to a valve body |
DE502004002718D1 (en) * | 2003-02-27 | 2007-03-15 | Bosch Gmbh Robert | Fuel injector |
-
2003
- 2003-12-03 DE DE2003157454 patent/DE10357454A1/en not_active Withdrawn
-
2004
- 2004-10-14 EP EP20040105050 patent/EP1538331B1/en active Active
- 2004-10-14 DE DE200450003933 patent/DE502004003933D1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4858439A (en) * | 1987-03-03 | 1989-08-22 | Toyota Jidosha Kabushiki Kaisha | Device for varying a stroke |
EP0477400A1 (en) * | 1990-09-25 | 1992-04-01 | Siemens Aktiengesellschaft | Device for compensating the tolerance in the lift direction of the displacement transformer of a piezoelectric actuator |
DE19962177A1 (en) * | 1999-12-22 | 2001-07-12 | Siemens Ag | Hydraulic device for transmitting an actuator movement |
DE10159749A1 (en) * | 2001-12-05 | 2003-06-12 | Bosch Gmbh Robert | Fuel injection valve for an internal combustion engine comprises a pressure space which contains a hydraulic fluid and, by means of sealing units, is separated from the actuator and fuel spaces |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009080495A1 (en) | 2007-12-21 | 2009-07-02 | BSH Bosch und Siemens Hausgeräte GmbH | Ironing device |
Also Published As
Publication number | Publication date |
---|---|
EP1538331A1 (en) | 2005-06-08 |
EP1538331B1 (en) | 2007-05-30 |
DE502004003933D1 (en) | 2007-07-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8139 | Disposal/non-payment of the annual fee |