EP1144849B1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1144849B1 EP1144849B1 EP00988610A EP00988610A EP1144849B1 EP 1144849 B1 EP1144849 B1 EP 1144849B1 EP 00988610 A EP00988610 A EP 00988610A EP 00988610 A EP00988610 A EP 00988610A EP 1144849 B1 EP1144849 B1 EP 1144849B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- injection valve
- actuator
- flexible
- 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 44
- 238000002347 injection Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression 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
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007921 spray 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
- F02M61/16—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
- 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
- F02M51/0607—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means the actuator being hollow, e.g. with needle passing through the hollow space
Definitions
- the invention is based on a fuel injection valve according to the preamble of the main claim.
- a fuel injection valve according to the preamble of the claim 1 is known from DE 195 00 706 A1.
- the repeater in the valve housing is the reciprocating piston the repeater with a reduced diameter end portion provided in a recess in the working piston protruding the repeater.
- One in the of the pistons limited booster chamber inserted diaphragm spring sets the Working piston to the actuator and one in the recess concentric with the end portion arranged helical compression spring pushes the piston against the valve needle.
- Influences of temperature changes, wear and manufacturing tolerances on the travel of the actuator are characterized compensates for that on the guide surfaces of the piston between the piston and between the piston and the inner wall of the Valve housing in each case a hollow cylindrical throttle gap is provided, via which the booster chamber with a liquid-filled low pressure space communicates. That of the booster chamber, the throttle gaps and the Low-pressure space predetermined volume is completed.
- a disadvantage of the known from DE 195 00 706 A1 lifting device is mainly the elaborate construction and the Length of the valve. Also the relatively large volume and the relatively large cross-sectional area of the actuator leave no particular compact design too. In addition, there are the big ones Displacement volumes a high cavitation tendency in the Throttle gaps.
- the document US 4 803 393 A shows a fuel injection valve with a piezoelectric actuator and a hydraulic transmission device with two flexible seals.
- the fuel injection valve according to the invention with the characterizing Features of the main claim has in contrast the advantage that the lifting device is designed to be flexible and in addition to a Hubüber GmbH and a Hubumledge also a easy temperature compensation is achieved.
- the designed as corrugated pipes seals are flexible, so that length changes are compensated.
- the flexibility of the seals makes the dynamic Behavior of the fuel injection valve improved since the flexible corrugated pipes bouncing the valve closing body at the valve seat surface and thus a reopening of the Prevent fuel injector largely. Thereby Greater accuracy in metering times and quantities reached.
- the tubular actuator allowed by the partial housing the valve needle in the central recess of the actuator a particularly compact and lightweight design of the fuel injection valve, being a tubular, opposite a nozzle body sealed valve needle at the same time Fuel supply to the sealing seat is used.
- Fig. 1 shows an embodiment in an axial sectional view a fuel injection valve according to the invention 1. This is an inward opening Fuel Injector 1.
- the fuel injector 1 is used in particular for the direct injection of fuel into the combustion chamber of a mixture-compressing, spark-ignited Internal combustion engine.
- the fuel injection valve 1 includes an actuator 2, which from disk-shaped piezoelectric or magnetostrictive Elements 3 constructed and formed tubular is.
- the actuator 2 thus has a central recess 4, in which a valve needle 5 is guided.
- the valve needle 5 is tubular and has a central Recess 6, through which the fuel flows.
- the Fuel supply via a connection sleeve 8 in a nozzle-shaped extension 9 of the valve needle. 5
- the actuator 2 is located with a first end face 10 at a Actuator cover plate 11 on.
- the actuator cover plate 11 and the valve needle 5 are interconnected by a first fuel seal 12 connected, which in the exemplary embodiment as a corrugated pipe is trained.
- a first fuel seal 12 connected, which in the exemplary embodiment as a corrugated pipe is trained.
- the first fuel seal 12 is an actuator housing 13 against the fuel, the centrally over the connecting sleeve 8 is supplied, sealed.
- In Abspritzides is the actuator housing 13 by a second Fuel seal 14 sealed, in the embodiment also designed as a corrugated pipe.
- the second Fuel seal 14 is connected to the actuator housing 13 and the Valve needle 5 welded.
- a conversion device 15 is encapsulated.
- the conversion device 15 comprises an actuator base plate 16, on a second end face 17 of the actuator 2 is present. With the actuator base plate 16 is over a Weld 26b a tubular spacer 18 is connected, which is connected to a radial projection 19 at a first End 20 of a biasing spring 21 is supported.
- the biasing spring 21 is supported by a second end 22 on a support plate 23 from which inside on a shoulder of the actuator housing 13 is present.
- the intermediate piece 18 and the support plate 23 are connected by a first flexible seal 24.
- the actuator base plate 16 and the intermediate piece 18 engage behind a cross-sectionally L-shaped driver 25, the over a weld 26 a form fit with the valve needle. 5 connected is.
- the driver 25 is on the one hand by a second flexible seal 27 with the support plate 23 and on the other by a third flexible seal 28 with the radial Overhang 19 of the intermediate piece 18 preferably by Welding connected.
- the three flexible seals 24, 27 and 28 are executed in the embodiment as corrugated pipes and close a pressure space 29 of the converter 15, which is filled with a hydraulic medium. in the Pressure chamber 29, the biasing spring 21 is encapsulated.
- valve needle 5 with a valve closing body 30 connected to a valve seat 31 forms a sealing seat.
- the fuel is over across extending channels 32 in the valve needle 5 in between the valve closing body 30 and a nozzle body 33 located Gap 34 and passed on to the sealing seat, where he trained on at least one in a valve seat body 35 Spray opening 36 is sprayed.
- the actuator 2 If the actuator 2 is supplied with an electrical voltage, stretch the piezoelectric elements 3 of the actuator 2 from. There the actuator 2 on the Aktordeckplatte 11 fixed to the actuator housing 13 is applied, the actuator 2 can only in Abspritzetti expand and thereby pushes the actuator base plate 16 with the attached frictionally intermediate piece 18 in Abspritzides.
- the intermediate piece 18 presses the biasing spring 21 against the already existing bias further together.
- the driver 25 in the opening direction is moved.
- the driver 25 is in operative connection with the valve needle 5, which is why this also in Opening direction is moved.
- the valve closing body 30 lifts from the valve seat surface 31 and becomes fuel through the injection opening formed in the valve seat body 35 36 hosed.
- the direction reversal of Aktorhubs by the conversion device 15 is possible because of the high operating speed of the actuator 2.
- the hydraulic medium behaves incompressible.
- a displacement of the hydraulic medium has a pulse transmission result.
- the invention is not limited to the illustrated embodiment limited, but also in a variety of other Designs of fuel injection valves 1, in particular at outward opening fuel injection valves 1, realized.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- Fig. 1
- einen axialen Schnitt durch ein Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils.
Claims (9)
- Brennstoffeinspritzventil (1), insbesondere Einspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen, mit einem piezoelektrischen oder magnetostriktiven Aktor (2) und einem von dem Aktor (2) mittels einer Ventilnadel (5) betätigbaren Ventilschließkörper (30), der mit einer Ventilsitzfläche (31) zu einem Dichtsitz zusammenwirkt,
dadurch gekennzeichnet, dass der Aktor (2) ein Zwischenstück (18) betätigt und die Ventilnadel (5) von einem Mitnehmer (25) betätigt wird und dass das Zwischenstück (18) über eine erste flexible Dichtung (24) mit einer Stützplatte (23) verbunden ist, die Stützplatte (23) über eine zweite flexible Dichtung (27) mit dem Mitnehmer (25) verbunden ist und der Mitnehmer (25) über eine dritte flexible Dichtung (28) mit dem Zwischenstück (18) verbunden ist, wobei durch die drei flexiblen Dichtungen (24, 27, 28), das Zwischenstück (18), den Mitnehmer (25) und die Stützplatte (23) ein hermetisch abgeschlossener, mit einem Hydraulikmedium gefüllter Druckraum (29) einer hydraulischen Umsetzungseinrichtung (15) gebildet wird. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, dass der Mitnehmer (25) formschlüssig, insbesondere durch Schweißen, mit der Ventilnadel (5) verbunden ist. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, dass in dem Druckraum (29) eine Vorspannfeder (21) angeordnet ist. - Brennstoffeinspritzventil nach Anspruch 3,
dadurch gekennzeichnet, dass sich die Vorspannfeder (21) mit einem ersten Ende (20) an einem radialen Überstand (19) des Zwischenstücks (18) und mit einem zweiten Ende (22) an der Stützplatte (23) abstützt. - Brennstoffeinspritzventil nach Anspruch 4,
dadurch gekennzeichnet, dass die dritte flexible Dichtung (28) mit dem radialen Überstand (19) des Zwischenstücks (18) verbunden ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass die flexiblen Dichtungen (24, 27, 28) als flexible Wellrohre ausgeführt sind. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass der Aktor (2) rohrförmig ausgebildet ist und sich die rohrförmige Ventilnadel (5) durch den Aktor (2) hindurch erstreckt. - Brennstoffeinspritzventil nach Anspruch 7,
dadurch gekennzeichnet, dass die Zuführung des Brennstoffs durch die rohrförmige Ventilnadel (5) hindurch zu dem Dichtsitz erfolgt und dass die Ventilnadel (5) gegenüber einem Aktorgehäuse (13) an einem zulaufseitigen Ende mittels einer ersten flexiblen Brennstoffdichtung (12) und an einem abspritzseitigen Ende mittels einer zweiten flexiblen Brennstoffdichtung (14) abgedichtet ist. - Brennstoffeinspritzventil nach Anspruch 8,
dadurch gekennzeichnet, dass die flexiblen Brennstoffdichtungen (12, 14) als flexible Wellrohre ausgeführt sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19954537A DE19954537A1 (de) | 1999-11-12 | 1999-11-12 | Brennstoffeinspritzventil |
DE19954537 | 1999-11-12 | ||
PCT/DE2000/004017 WO2001036808A1 (de) | 1999-11-12 | 2000-11-11 | Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1144849A1 EP1144849A1 (de) | 2001-10-17 |
EP1144849B1 true EP1144849B1 (de) | 2005-10-19 |
Family
ID=7928857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00988610A Expired - Lifetime EP1144849B1 (de) | 1999-11-12 | 2000-11-11 | Brennstoffeinspritzventil |
Country Status (7)
Country | Link |
---|---|
US (1) | US6712289B1 (de) |
EP (1) | EP1144849B1 (de) |
JP (1) | JP2003515032A (de) |
CN (1) | CN1196855C (de) |
CZ (1) | CZ295500B6 (de) |
DE (2) | DE19954537A1 (de) |
WO (1) | WO2001036808A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10148594A1 (de) * | 2001-10-02 | 2003-04-10 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10159749A1 (de) | 2001-12-05 | 2003-06-12 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10328573A1 (de) * | 2003-06-25 | 2005-01-13 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102005042786B4 (de) * | 2005-09-08 | 2009-04-16 | Siemens Ag | Kraftstoffinjektor mit hermetisch abgedichtetem Hydrauliksystem |
FR2947200B1 (fr) * | 2009-06-25 | 2011-08-19 | Prospection & Inventions | Outil de pose d'elements de fixation a injecteur de combustible |
DE102012219974A1 (de) | 2012-10-31 | 2014-04-30 | Robert Bosch Gmbh | Aktor |
DE112014007115B4 (de) | 2014-10-28 | 2022-12-08 | Mitsubishi Electric Corporation | Kraftstoffeinspritzventil |
CN106939863B (zh) * | 2017-04-28 | 2022-05-17 | 南岳电控(衡阳)工业技术股份有限公司 | 一种配备有计量伺服阀的燃油喷油器 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4803393A (en) * | 1986-07-31 | 1989-02-07 | Toyota Jidosha Kabushiki Kaisha | Piezoelectric actuator |
US5205492A (en) * | 1991-12-16 | 1993-04-27 | Gregory Khinchuk | Fuel injection valve |
JPH0861181A (ja) * | 1994-08-25 | 1996-03-05 | Mitsubishi Electric Corp | 燃料噴射装置 |
DE19500706C2 (de) | 1995-01-12 | 2003-09-25 | Bosch Gmbh Robert | Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen |
JP3817826B2 (ja) * | 1997-04-18 | 2006-09-06 | 日産自動車株式会社 | エンジンの燃料噴射弁 |
DE19856202A1 (de) * | 1998-12-05 | 2000-06-15 | Bosch Gmbh Robert | Piezoelektrischer Aktor |
DE10023322A1 (de) * | 2000-05-12 | 2001-11-15 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brenkraftmaschinen |
-
1999
- 1999-11-12 DE DE19954537A patent/DE19954537A1/de not_active Withdrawn
-
2000
- 2000-11-11 US US09/889,226 patent/US6712289B1/en not_active Expired - Fee Related
- 2000-11-11 CN CN00802295.XA patent/CN1196855C/zh not_active Expired - Fee Related
- 2000-11-11 CZ CZ20012499A patent/CZ295500B6/cs not_active IP Right Cessation
- 2000-11-11 EP EP00988610A patent/EP1144849B1/de not_active Expired - Lifetime
- 2000-11-11 DE DE50011377T patent/DE50011377D1/de not_active Expired - Fee Related
- 2000-11-11 WO PCT/DE2000/004017 patent/WO2001036808A1/de active IP Right Grant
- 2000-11-11 JP JP2001538666A patent/JP2003515032A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
EP1144849A1 (de) | 2001-10-17 |
DE50011377D1 (de) | 2006-03-02 |
CZ295500B6 (cs) | 2005-08-17 |
JP2003515032A (ja) | 2003-04-22 |
WO2001036808A1 (de) | 2001-05-25 |
CN1196855C (zh) | 2005-04-13 |
DE19954537A1 (de) | 2001-05-17 |
CZ20012499A3 (cs) | 2002-11-13 |
US6712289B1 (en) | 2004-03-30 |
CN1327509A (zh) | 2001-12-19 |
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