EP1454056B1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1454056B1 EP1454056B1 EP02805246A EP02805246A EP1454056B1 EP 1454056 B1 EP1454056 B1 EP 1454056B1 EP 02805246 A EP02805246 A EP 02805246A EP 02805246 A EP02805246 A EP 02805246A EP 1454056 B1 EP1454056 B1 EP 1454056B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- fuel injection
- injection valve
- needle
- fuel
- 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.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 69
- 238000002347 injection Methods 0.000 title claims abstract description 39
- 239000007924 injection Substances 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture 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
- 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
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
Definitions
- the invention is based on a fuel injection valve according to the preamble of the main claim.
- a Fuel injector known which one in one Nozzle body axially movable nozzle needle, which by a piezoelectric actuator is actuated and by a Compression spring is held in the closed position.
- the Fuel is supplied from an external source with freely adjustable pressure.
- the nozzle needle has a Central bore on, with the actuator, the nozzle needle concentrically surrounds and by means of sealing surfaces against the Fuel pressure is sealed.
- a disadvantage of the known from DE 195 34 445 C2 Injection valve is in particular that the stroke of the actuator by the influence of the fuel pressure despite the Sealing surfaces can vary so much that a to Compensation of thermal changes in length provided Air gap between the actuator and the valve needle so big that the valve can not be opened.
- EP 1 046 809 A2 discloses a fluid metering device with a metal bellows, which is hermetically sealed and generates only small axial pressure-related forces.
- EP 1 111 230 A2 discloses a hydraulic Device for transmitting an actuator movement with a Metal bellows for sealing.
- DE 100 07 733 A1 discloses an injection valve, at which between the actuator and the nozzle needle for Sealing of the under high pressure Fuel is arranged a metallic corrugated pipe.
- the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the structural design the valve needle relief of the actuator Pressure equalization of the valve needle allowed.
- the valve needle learns in the closed state of Fuel injection valve in the axial direction no Pressure force component. As a result, the actuator is relieved.
- the freedom of the valve needle can thereby be brought about that the valve needle with a flexible seal communicates and the Joint with the flexible seal the same Radial distance from the central axis of the Fuel injection valve has as the sealing seat.
- valve needle between the valve needle and a valve needle guide formed a throttle gap is, which intercepts the dynamic portion of the pressure.
- pressure oscillations reach the corrugated tube seal no more.
- annular Valve needle guide and the housing of the Fuel injection valve designed throttle point for, that pressure oscillations through the Fuel injection valve does not flow through the fuel can be transferred to the valve needle.
- the inner diameter of the Valve needle guide the inner diameter of the sealing seat corresponds, so that the valve needle and with it in Active connection standing actuator body are guided axially and thereby offsets the valve needle and the Actuator be avoided.
- a illustrated in Fig. 1 first embodiment of a Fuel injection valve 1 according to the invention is in shape a fuel injection valve 1 for Fuel injection systems of mixture compression, spark-ignited internal combustion engines running.
- the Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated combustion chamber of an internal combustion engine.
- the fuel injection valve 1 comprises a housing 2 in which an actuator 3 is arranged.
- the actuator 3 consists for example, from several layers 4, consisting of a consist of piezoelectrically excitable material and For example, glued together.
- the actuator 3 supports on the inlet side on a housing component 5 and downstream on an actuator head 6.
- valve needle 10 Downstream of the actuator head 6 is a valve needle. 10 arranged downstream of the actuator head 6 . Between the actuator head 6 and the valve needle 10th If an air gap 11 is formed.
- the valve needle 10th passes through the intermediate member 9, wherein the valve needle 10th with the intermediate component 9 via a flexible seal 12, preferably a flexible corrugated tube seal 12, against the the fuel injection valve 1 flowing through the fuel is sealed.
- the corrugated tube seal 12 is connected to the Intermediate member 9 and the valve needle 10 respectively welded.
- the housing 2 and the intermediate member 9 are sealed by a sealing ring 13 against each other.
- the valve needle 10 passes through the example with a U-shaped cross-section provided intermediate member 9 so that a downstream leg 14 of the intermediate member 9 as Valve needle guide is used.
- the valve needle 10 can for example, for the sake of better switching dynamics a Have recess 15.
- valve needle 10 Downstream of the valve needle 10 is an actuating body 16, which at its downstream end a Valve-closing body 17 has.
- the valve closing body 17 acts with a valve seat surface 28 to a sealing seat 25th together.
- the valve seat surface 28 may in particular on a formed annular valve seat body 18 be executed, which is either integral with the housing 2 or is suitably associated with it.
- a return spring 20 is arranged between the valve seat body 18 and a downstream end 19 the valve needle 10; which the fuel injection valve 1 in the non-energized State of the actuator 3 keeps closed.
- the fuel injection valve 1 further comprises a Valve needle guide 21, which, for example, annular may be executed and their radial extent chosen is that between the annular valve needle guide 21 and the housing 2, a throttle body 22 is formed.
- a Valve needle guide 21 which, for example, annular may be executed and their radial extent chosen is that between the annular valve needle guide 21 and the housing 2, a throttle body 22 is formed.
- the fuel injector 1 flowing through Fuel. is about a not shown Fuel supply and fed via a fuel line 23, which extends for example in the housing 2, on the Actuator 3 passed.
- Outflow side of the corrugated tube 12 is an inner space 24 of the fuel injection valve 1 completely filled with fuel.
- This fuel is available under fuel pressure, the so-called system pressure.
- the piezoelectric layers 4 expand, so that the actuator base 6 in the direction of the valve needle 10 in a discharge direction of the fuel moves.
- the air gap 11 between the actuator base 6 and the valve needle 10 is closed by it.
- the actuator 3 pushes the Valve needle 10 and thus also the actuator body 16 in Downstream of the fuel, so that at the Operating body 16 formed valve closing body 17 of the valve seat surface 28, which on the valve seat body 18th is formed lifts, the fuel injection valve. 1 is opened and fuel in the not further hosed shown combustion chamber of the internal combustion engine becomes.
- valve needle 10th with the preferably designed as a corrugated tube seal 12 flexible seal 12 is connected to the same radial Distance from the central axis 27 of the Fuel injection valve 1 as the sealing seat 25, so will the valve needle 10 in the closed state by the Fuel pressure is not applied and is pressure-balanced.
- the valve needle 10 thus even with closed air gap 11 no forces on the Transfer actuator 3.
- the invention is not limited to that shown Embodiment limited and, for example, for Inwardly opening fuel injectors 1 or magnetostrictive actuators 3 applicable.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- Fig. 1
- einen schematischen Schnitt durch ein Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils.
Claims (9)
- Brennstoffeinspritzventil (1) zum direkten Einspritzen von Brennstoff in den Brennraum einer Brennkraftmaschine, mit einem piezoelektrischen oder magnetostriktiven Aktor (3), einer durch den Aktor (3) betätigbaren Ventilnadel (10), welche mit einem Ventilschließkörper (17) zusammenwirkt, der mit einem Ventilsitzkörper (18) einen Dichtsitz (25) bildet, und einer Rückstellfeder (20), durch welche die Ventilnadel (10) in einer Schließrichtung beaufschlagt ist, wobei die Ventilnadel (10) im geschlossenen Zustand druckausgeglichen ist, indem die Kraft, die der Brennstoffdruck in Öffnungsrichtung auf die Ventilnadel (10) ausübt, etwa gleich der Kraft ist, die der Brennstoffdruck in Schließrichtung auf die Ventilnadel (10) ausübt,
dadurch gekennzeichnet, dass eine Ventilnadelführung (21) vorgesehen ist, welche mit einem Gehäuse (2) des Brennstoffeinspritzventils (1) eine Drosselstelle (22) bildet. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, dass die Ventilnadel (10) mit einer flexiblen Dichtung (12) in Verbindung steht und die Verbindungsstelle (26) mit der flexiblen Dichtung (12) den gleichen radialen Abstand wie der Dichtsitz (25) von einer Mittelachse (27) des Brennstoffeinspritzventils (1) aufweist. - Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass ein Innendurchmesser der Ventilnadelführung (21) gleich einem Innendurchmesser des ventilsitzkörpers (18) ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass die Ventilnadel (10) ein Zwischenbauteil (9) durchgreift, welches in dem Gehäuse (2) des Brennstoffeinspritzventils (1) angeordnet ist. - Brennstoffeinspritzventil nach Anspruch 4,
dadurch gekennzeichnet, dass das Zwischenbauteil (9) durch einen Dichtring (13) gegen das Gehäuse (2) des Brennstoffeinspritzventils (1) abgedichtet ist. - Brennstoffeinspritzventil nach Anspruch 4 oder 5,
dadurch gekennzeichnet, dass die Ventilnadel (10) und das Zwischenbauteil (9) durch eine Wellrohrdichtung (12) gegen den Brennstoff, welcher das Brennstoffeinspritzventil (1) durchströmt, abgedichtet sind. - Brennstoffeinspritzventil nach Anspruch 6,
dadurch gekennzeichnet, dass die Wellrohrdichtung (12) mit der Ventilnadel (10) und dem Zwischenbauteil (9) verschweißt ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass der Aktor (3) durch eine Vorspannfeder (7) auf Vorspannung gebracht ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass zwischen dem Aktorfuß (6) und der Ventilnadel (10) ein Luftspalt (11) ausgebildet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10159750 | 2001-12-05 | ||
DE10159750A DE10159750A1 (de) | 2001-12-05 | 2001-12-05 | Brennstoffeinspritzventil |
PCT/DE2002/004317 WO2003054382A1 (de) | 2001-12-05 | 2002-11-25 | Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1454056A1 EP1454056A1 (de) | 2004-09-08 |
EP1454056B1 true EP1454056B1 (de) | 2005-10-12 |
Family
ID=7708138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02805246A Expired - Lifetime EP1454056B1 (de) | 2001-12-05 | 2002-11-25 | Brennstoffeinspritzventil |
Country Status (7)
Country | Link |
---|---|
US (1) | US6892956B2 (de) |
EP (1) | EP1454056B1 (de) |
JP (1) | JP4335685B2 (de) |
KR (1) | KR100935810B1 (de) |
AT (1) | ATE306614T1 (de) |
DE (2) | DE10159750A1 (de) |
WO (1) | WO2003054382A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10353641B4 (de) * | 2003-11-17 | 2016-12-01 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102004002299A1 (de) * | 2004-01-16 | 2005-08-04 | Robert Bosch Gmbh | Kraftstoffinjektor mit direkt angesteuertem Einspritzventilglied |
US7942349B1 (en) | 2009-03-24 | 2011-05-17 | Meyer Andrew E | Fuel injector |
EP2707592B1 (de) * | 2011-05-13 | 2020-04-22 | Andrew E. Meyer | Kraftstoffeinspritventil |
DE102011087005A1 (de) * | 2011-11-24 | 2013-05-29 | Robert Bosch Gmbh | Ventil zum Zumessen eines strömenden Mediums |
CA2809249C (en) * | 2013-03-15 | 2014-03-11 | Westport Power Inc. | Apparatus for controlling the lift of a valve member |
EP2863048B1 (de) * | 2013-10-21 | 2017-12-06 | C.R.F. Società Consortile Per Azioni | Kraftstoff-Elektro-Einspritzelement für ein Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
JP2017066955A (ja) * | 2015-09-30 | 2017-04-06 | 日立オートモティブシステムズ株式会社 | 流量制御弁 |
DE102018001048A1 (de) * | 2018-02-09 | 2019-08-14 | Atlas Copco Ias Gmbh | Dosierventil |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003031799A1 (de) * | 2001-10-02 | 2003-04-17 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
WO2003048559A1 (de) * | 2001-11-30 | 2003-06-12 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19534445C2 (de) | 1995-09-16 | 1998-07-30 | Man Nutzfahrzeuge Ag | Einspritzventil für Brennkraftmaschinen |
EP1046809B1 (de) * | 1999-04-20 | 2005-08-10 | Siemens Aktiengesellschaft | Fluiddosiervorrichtung |
DE19962177A1 (de) | 1999-12-22 | 2001-07-12 | Siemens Ag | Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung |
DE10007733A1 (de) * | 2000-02-19 | 2001-08-23 | Daimler Chrysler Ag | Einspritzventil |
DE10007735A1 (de) * | 2000-02-19 | 2001-09-06 | Daimler Chrysler Ag | Einspritzventil |
-
2001
- 2001-12-05 DE DE10159750A patent/DE10159750A1/de not_active Withdrawn
-
2002
- 2002-11-25 EP EP02805246A patent/EP1454056B1/de not_active Expired - Lifetime
- 2002-11-25 AT AT02805246T patent/ATE306614T1/de not_active IP Right Cessation
- 2002-11-25 WO PCT/DE2002/004317 patent/WO2003054382A1/de active IP Right Grant
- 2002-11-25 KR KR1020047008405A patent/KR100935810B1/ko not_active IP Right Cessation
- 2002-11-25 JP JP2003555067A patent/JP4335685B2/ja not_active Expired - Fee Related
- 2002-11-25 US US10/467,039 patent/US6892956B2/en not_active Expired - Lifetime
- 2002-11-25 DE DE50204560T patent/DE50204560D1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003031799A1 (de) * | 2001-10-02 | 2003-04-17 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
WO2003048559A1 (de) * | 2001-11-30 | 2003-06-12 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Also Published As
Publication number | Publication date |
---|---|
ATE306614T1 (de) | 2005-10-15 |
JP4335685B2 (ja) | 2009-09-30 |
KR100935810B1 (ko) | 2010-01-08 |
WO2003054382A1 (de) | 2003-07-03 |
DE50204560D1 (de) | 2006-02-23 |
EP1454056A1 (de) | 2004-09-08 |
DE10159750A1 (de) | 2003-06-12 |
US6892956B2 (en) | 2005-05-17 |
US20040124274A1 (en) | 2004-07-01 |
JP2005513336A (ja) | 2005-05-12 |
KR20040066857A (ko) | 2004-07-27 |
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