EP1339971B1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1339971B1 EP1339971B1 EP01997637A EP01997637A EP1339971B1 EP 1339971 B1 EP1339971 B1 EP 1339971B1 EP 01997637 A EP01997637 A EP 01997637A EP 01997637 A EP01997637 A EP 01997637A EP 1339971 B1 EP1339971 B1 EP 1339971B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- swirl
- fuel injection
- control
- needle
- 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
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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
-
- 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
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
- F02M51/0617—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets
-
- 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
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
-
- 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
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
- F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
Definitions
- the invention is based on a fuel injector according to the preamble of claim 1.
- DE 197 36 682 A1 describes a fuel injector known, which has a valve closing body with a valve seat body forms a sealing seat. upstream of the sealing seat is a swirl element on the valve seat body arranged in the feed of the fuel.
- the swirl element is disc-shaped. Because of its center it is Valve closing body carried out with a valve needle is formed in one piece. Channels are radially spiraled excluded from the disc-shaped swirl element, which on the side facing away from the valve seat body from a Guide element for the valve needle are covered. Radial the end areas of the channels become outward towards one Fuel chamber that surrounds the valve needle from which Guide element released.
- valve closing body If the valve closing body is lifted out of the sealing seat, fuel flows through the channels of the swirl element and is related to one Axis of the valve needle set in rotation. If the Fuel through a subsequent to the sealing seat Spray outlet emerges, the fuel is through the Centrifugal force atomized.
- a disadvantage of this prior art is that the Flow of the valve is constant and small Injection volumes achieved through very short switching times Need to become. Furthermore, the swirl and thus the Beam angle ⁇ is constant due to geometry and can be in Operation cannot be varied.
- DE 40 23 223 A1 discloses a fuel injection valve known that a first valve needle and a second Has valve needle.
- the second valve needle is as Hollow needle formed, the first valve needle coaxial encloses. Both valve needles are through a between first valve needle and second valve needle arranged sleeve Cut. Via the first valve needle and one of these formed with a first valve seat surface A first hole circle consisting of spray openings becomes a sealing seat locked. Over the hollow needle and one of these with a second valve seat surface formed second sealing seat becomes a second bolt circle from spray orifices locked. By operating the valve needles separately the flow rate of the fuel can be controlled.
- the fuel injector according to the invention with the Features of claim 1 in contrast the advantage that even with only one Spray opening a regulation of the flow and thus the amount of fuel injected is also possible at the same time, a favorable swirl Training of the fuel jet is achieved.
- the regulation of the flow can also be the jet angle can be varied depending on the operating point.
- the switching times and response times of the Fuel injector is not adversely affected because the second valve needle during the time that the Fuel injector is closed, operated can.
- the first valve needle comes out of its sealing seat is raised and the fuel injector opens, the fuel is fed in, depending on whether the second Valve needle the control inlet openings of the control swirl channels releases or covers, unthrottled or throttled.
- the second valve needle is favorable as a hollow needle formed and coaxially encloses the first valve needle.
- the construction volume is advantageously kept small and the fuel injector is cheap for manufacturing formed symmetrically about a central axis.
- the second valve needle advantageously has at least one flat valve body section with a Valve seat surface of the swirl element to form a flat sealing seat interacts.
- the second valve needle is guided and can do not twist.
- the valve body sections of the second Valve needles always come to rest on the flat sealing seats.
- control swirl channels favorably point away from the swirl channels deviating opening angles in a swirl chamber.
- Swirl channels and control swirl channels can do this be interpreted that if only the swirl channels are released a different beam angle is formed than if Swirl channels and control swirl channels interact and create one Form the sum beam angle from both designs.
- the second valve needle can advantageously be from an actuator against the pressure of a spring on the control inlet openings of the control swirl channels are pushed.
- the actuator can underperform and therefore in Construction volume can be designed small.
- Fig. 1 shows a schematic section through a Embodiment of an inventive Fuel injection valve 1.
- the lower one is shown Section of a fuel injector 1, one here not shown combustion chamber of an internal combustion engine is facing.
- the fuel injector 1 consists of a Valve body 2, in which a first valve needle 3 is arranged is.
- the first valve needle 3 is in one piece with a first Valve closing body 4 formed with a first Valve seat 5 on a valve seat body 6 to one Sealing seat 7 interacts.
- the valve seat body 6 has via at least one spray opening 8.
- On a Magnetic coil support 9 is, via a weld 10 with the Valve body 2 connected, a first solenoid 11 wound and encased by a first outer pole 12.
- On Inner pole 13 is connected to the magnet coil support 9 by a Weld seam 14 welded.
- the first valve needle 3 is over a first armature 15, which is connected to the first valve needle 3 a weld 16 is non-positively connected to the Biasing force of a first spring 17 loaded over the first valve needle 3 the first valve closing body 4 in the Seals 7 presses.
- the first anchor 15 has at least one Passage bore 18 for the fuel by one Fuel inlet 19 flows to the sealing seat 7.
- a second valve needle 20 is designed as a hollow needle 21, which coaxially surrounds the first valve needle 3.
- the hollow needle 21 is via a weld seam 22 with a second anchor 23 connected by a second spring 24 against one Stop ring 25 is biased.
- the second anchor 23 is a second solenoid 26 assigned to the Solenoid coil carrier 9 is wound.
- the second solenoid 26 is surrounded by a second outer pole 27.
- the second Armature 23 has passage bores 27a for the fuel.
- the swirl element 28 is arranged at the valve seat body 6 is in the feed path of the fuel a swirl element 28 is arranged.
- the swirl element 28 has Control inlet openings 29 through which the fuel in Control swirl channels 30 can reach. In the Control inlet openings 29 engage guide sections 31 of the Hollow needle 21 a.
- the hollow needle 21 secured against twisting.
- the hollow needle 21 is in the areas of a control inlet opening 29 as flat valve body portion 32 formed.
- This Area of a fuel injector 1 according to the invention is to be described in more detail with reference to FIGS. 2 and 3 the cutting planes along the lines II-II and III-III show in Fig. 1.
- FIG. 2 shows a sectional view of the sectional plane II in FIG. 1.
- the cutting plane lies at the level of the upper edge of the Twist elements 28 and shows the cut in the middle illustrated first valve needle 3 and two inlet openings 33 for swirl channels not visible in this section plane.
- the swirl element 28 is surrounded by the valve body 2.
- the flat valve body sections 32 cover the Control inlet openings 29 by a dashed line are not made clear to those in this section plane visible control swirl channels 30.
- Fig. 3 shows in supervision the sectional plane III in Fig. 1, the a section through the swirl element 28 at the level of Control swirl channels 30 corresponds.
- the Control swirl channels 30 have swirl channels 34 which are provided by the hollow needle 21 does not face the fuel inlet 19 can be sealed.
- valve body 2 and Swirl channels 34 are arranged the inlet openings 33.
- the Control inlet openings 29 are with the control swirl channels 30 connected.
- Both the control swirl channels 30 and the Swirl channels 34 open tangentially into one at an angle annular swirl chamber 35 through which the valve needle 3rd or the valve closing body 4 is passed.
- the Swirl channels 34 open in the described embodiment the invention at an angle smaller than the tangent the swirl chamber 35 as the control swirl channels 30.
- angles of swirl and Control swirl channels can also be selected vice versa.
- the hollow needle 21 through the second solenoid 26 is actuated, the Fuel when the valve needle 3 comes out of the sealing seat 7 is raised, not via the control swirl channels 30, but only run through the swirl channels 34 to the spray opening 8. Due to the smaller total cross-section, the flow rate of the fuel throttled and the injection quantity reduced. Due to the strong rotation in the swirl chamber 35 due to the opening angle of the swirl channels 34 is formed a large beam angle in the described embodiment out. If the control swirl channels 30 are also released, can a large amount of fuel to the spray port 8 stream. By a smaller opening angle of the Control swirl channels 30 result in less rotation overall reached, which leads to a smaller beam angle.
- the hollow needle 21 during the Preset closing time of fuel injector 1 can be and therefore no influence on the Has opening behavior of the fuel injector 1.
- the Hollow needle 21 only largely has the control inlet openings 29 close tightly since the sealing seat 7 has the spray opening 8 closes in total from the fuel inlet 19. Out for the same reason, the hollow needle 21 does not have to against the Working fuel pressure. Overall, the second Solenoid 26 can therefore be designed weaker.
Description
- Fig. 1
- einen schematischen Schnitt durch ein Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils,
- Fig. 2
- in Aufsicht die Schnittebene II in der Fig. 1, und
- Fig. 3
- in Aufsicht die Schnittebene III in Fig. 1.
Claims (9)
- Brennstoffeinspritzventil (1), insbesondere Einspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen, mit einer ersten Ventilnadel (3), die mit einem ersten Ventilschließkörper (4) in Wirkverbindung steht, wobei der erste Ventilschließkörper (4) mit einer ersten Ventilsitzfläche (5) in einem Ventilsitzkörper (6) zu einem Dichtsitz (7) zusammenwirkt und wobei stromaufwärts des Dichtsitzes (7) im Zulauf des Brennstoffes ein Drallelement (28) angeordnet ist, das zumindest einen Drallkanal (34) und zumindest einen Steuerdrallkanal (30) aufweist, die in eine Drallkammer (35) münden,
dadurch gekennzeichnet, daß eine zweite Ventilnadel (20) eine Steuerzulauföffnung (29) zu jedem Steuerdrallkanal (30) bei Betätigung überdeckt. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß die zweite Ventilnadel (20) als eine Hohlnadel (21) ausgebildet ist und koaxial die erste Ventilnadel (3) umschließt. - Brennstoffeinspritzventil nach Anspruch 2,
dadurch gekennzeichnet, daß die Hohlnadel (21) je Steuerzulauföffnung (29) einen flächigen Ventilkörperabschnitt (32) aufweist, der mit jeweils einer Ventilsitzfläche des Drallelements (28) zu jeweils einem Flachdichtsitz zusammenwirkt. - Brennstoffeinspritzventil nach Anspruch 3,
dadurch gekennzeichnet, daß Führungsabschnitte (31) der Hohlnadel (21) in die Steuerzulauföffnungen (29) der Steuerdrallkanäle (30) eingreifen. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Steuerdrallkanäle (30) von den Drallkanälen (34) abweichende Durchlaßquerschnitte aufweisen. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Steuerdrallkanäle (30) von den Drallkanälen (34) abweichende Einmündewinkel in eine Drallkammer (35) aufweisen. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die erste Ventilnadel (3) durch einen ersten Aktor (11) betätigbar ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 7
dadurch gekennzeichnet, daß die zweite Ventilnadel (20) durch einen zweiten Aktor (26) betätigbar ist. - Brennstoffeinspritzventil nach Anspruch 8,
dadurch gekennzeichnet, daß die zweite Ventilnadel (20) von dem zweiten Aktor (26) gegen den Druck einer Feder (24) auf die Steuerzulauföffnungen (29) der Steuerdrallkanäle (30) geschoben wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10057631 | 2000-11-21 | ||
DE10057631A DE10057631A1 (de) | 2000-11-21 | 2000-11-21 | Brennstoffeinspritzventil |
PCT/DE2001/004298 WO2002042635A1 (de) | 2000-11-21 | 2001-11-20 | Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1339971A1 EP1339971A1 (de) | 2003-09-03 |
EP1339971B1 true EP1339971B1 (de) | 2004-05-12 |
Family
ID=7664036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01997637A Expired - Lifetime EP1339971B1 (de) | 2000-11-21 | 2001-11-20 | Brennstoffeinspritzventil |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1339971B1 (de) |
CZ (1) | CZ20022964A3 (de) |
DE (2) | DE10057631A1 (de) |
ES (1) | ES2220833T3 (de) |
WO (1) | WO2002042635A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10251698A1 (de) * | 2002-11-06 | 2004-06-03 | Robert Bosch Gmbh | Dosiereinrichtung |
DE10251699A1 (de) | 2002-11-06 | 2004-06-03 | Robert Bosch Gmbh | Dosiereinrichtung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH326308A (de) * | 1955-09-19 | 1957-12-15 | Licencia Talalmanyokat | Einspritzventil für Dieselmotoren und Verfahren zu dessen Herstellung |
DE4023223A1 (de) | 1990-07-21 | 1992-01-23 | Bosch Gmbh Robert | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
FR2726861B1 (fr) * | 1994-11-11 | 1999-03-26 | Volkswagen Ag | Injecteur pour un moteur a combustion interne a piston alternatif |
FR2744494B3 (fr) * | 1996-02-01 | 1998-01-02 | Peugeot Motocycles Sa | Injecteur de carburant, notamment dans un moteur thermique de vehicule |
JP3625106B2 (ja) * | 1996-07-29 | 2005-03-02 | 三菱電機株式会社 | 燃料噴射弁 |
DE19736682A1 (de) | 1997-08-22 | 1999-02-25 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19835340A1 (de) * | 1997-11-03 | 2000-02-10 | Guenter Slowik | Verfahren und Einspritzdüse zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine |
-
2000
- 2000-11-21 DE DE10057631A patent/DE10057631A1/de not_active Withdrawn
-
2001
- 2001-11-20 DE DE50102296T patent/DE50102296D1/de not_active Expired - Lifetime
- 2001-11-20 CZ CZ20022964A patent/CZ20022964A3/cs unknown
- 2001-11-20 WO PCT/DE2001/004298 patent/WO2002042635A1/de not_active Application Discontinuation
- 2001-11-20 EP EP01997637A patent/EP1339971B1/de not_active Expired - Lifetime
- 2001-11-20 ES ES01997637T patent/ES2220833T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CZ20022964A3 (en) | 2004-07-14 |
DE50102296D1 (de) | 2004-06-17 |
WO2002042635A1 (de) | 2002-05-30 |
EP1339971A1 (de) | 2003-09-03 |
DE10057631A1 (de) | 2002-05-23 |
ES2220833T3 (es) | 2004-12-16 |
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