EP1213474A2 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1213474A2 EP1213474A2 EP01124664A EP01124664A EP1213474A2 EP 1213474 A2 EP1213474 A2 EP 1213474A2 EP 01124664 A EP01124664 A EP 01124664A EP 01124664 A EP01124664 A EP 01124664A EP 1213474 A2 EP1213474 A2 EP 1213474A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- injection valve
- valve
- flow
- valve seat
- 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- Withdrawn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 76
- 238000002347 injection Methods 0.000 title claims abstract description 18
- 239000007924 injection Substances 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims description 24
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002996 emotional effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007704 transition Effects 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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
- F02M61/163—Means being injection-valves with helically or spirally shaped grooves
-
- 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
- F02M61/06—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 being furnished at seated ends with pintle or plug shaped extensions
-
- 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
Definitions
- the invention is based on a fuel injector according to the genus of the main claim.
- Fuel injector known to have a spherical shape Has valve closing body with a valve seat interacts in a valve seat body to form a sealing seat, the valve closing body upstream of the sealing seat over its circumference in a central bore of the Valve seat body is guided.
- fuel channels which are used as Central axis of the bore open grooves in the wall of the bore are introduced and through the valve closing body are closed at least over part of their length.
- the Fuel channels can form a swirl be arranged spirally and open into a circumferential Groove upstream of the sealing seat.
- Downstream of the Sealing seat is followed by a spray opening, at the Entry side a surrounding web for a targeted Disturbance of the flow. By length and diameter the spray opening and by means of the geometry of the web the opening angle of the spray cone can be adjusted.
- DT 25 43 805 A1 Furthermore from the DT 25 43 805 A1 is an inward opening fuel injector known in which one Valve needle upstream of the conical Sealing seat in a cylindrical recess of the Nozzle body is guided. To generate a swirl points the valve needle in the area of the guide grooves are formed spirally. The grooves open into one production-related undercut, so the Function of a swirl chamber.
- features of the main claim have the advantage that the guide is arranged directly on the valve closing body is.
- the valve needle can thus be carried out very easily his.
- By guiding over a cylindrical surface also the formation of an angular error between the Central axis of the fuel injector and the Center axis of the valve closing body can be prevented.
- the swirl-forming element is immediately in front of the Spray hole arranged.
- Fuel filled volume is from the fuel can be injected into the combustion chamber without swirl.
- Another advantage is that the flow of the Fuel upstream of the sealing seat has no effect the preparation of the twist has resulted in a larger one Manufacturing robustness leads.
- FIGS. 2 and 3 embodiments of a fuel injector 1 or one according to the invention Valve closing body guide with integrated swirl generation are to be described in more detail for a better understanding of the Invention first with reference to Figure 1, the invention Fuel injector 1 in an overall view explained briefly with regard to its essential components become.
- the fuel injector 1 is in the form of a Fuel injection valve for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines executed.
- the fuel injector 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown Internal combustion engine.
- the fuel injector 1 consists of a Nozzle body 2, in which a valve needle 3 is arranged.
- the valve needle 3 is in operative connection with a Valve closing body 4 with one on one Valve seat body 5 arranged valve seat surface 6 into one Sealing seat interacts.
- the fuel injector 1 in the exemplary embodiment it is an inward direction opening electromagnetically operated fuel injector 1, which has a spray opening 7.
- the nozzle body 2 is against the by a seal 8 Sealed outer pole 9 of a magnetic coil 10.
- the Magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which on a Inner pole 13 of the solenoid 10 is present.
- the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 separated and are supported on a connecting component 29 from.
- the solenoid 10 is connected via a line 19 from one can be supplied via an electrical plug contact 17 electrical current excited.
- the plug contact 17 is one Surround plastic sheath 18 on the inner pole 13th can be
- the valve needle 3 is in a valve needle guide 14 led, which is disc-shaped.
- a paired adjusting disc 15 is used for stroke adjustment the other side of the shim 15 is a Anchor 20.
- This is non-positively via a flange 21 with the valve needle 3 in connection, which by a Weld 22 is connected to the flange 21.
- On the Flange 21 is supported by a return spring 23, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
- Fuel channels 30a and 30b which the fuel which fed via a central fuel supply 16 and by a filter element 25 is filtered, to which Guide valve seat body 5.
- the fuel injector 1 is by a seal 28 against a not shown Distribution line sealed.
- a recess 32 which with a guide pin 31, the downstream of the sealing seat on the valve closing body 4 is arranged, cooperates to a guide.
- Flow of the fuel is at least one flow-guiding element 33 is introduced into the guide, which with the fuel injector 1 energized and thus when the valve closing body is lifted off the valve seat body 5 4, the fuel leads to the spray port 7.
- the valve seat body 5 has a through opening that on the upstream side of the valve seat body 5 the valve seat surface 6 is widened. Downstream is in Connection the recess 32 for guiding the Valve closing body 4 arranged. At the downstream end The spray opening 7 closes the through opening on.
- the recess 32 corresponds to the Guide pin 31 such that the guide pin 31 of upstream side of the valve seat body 5 in the Recess 32 can be introduced at least until the Valve closing body 5 and the valve seat surface 6 in sealing system to each other.
- the radial expansion of guide pin 31 and recess 32 are so to each other dimensioned that the gap forming hydraulically is sealing.
- the guide pin 31 is in the axial direction easily displaceable in the recess 32.
- the valve closing body 4 is downstream of it with the Valve seat surface 6 corresponding surface with the Guide pin 31 connected and has at least one flow-guiding element 33, which preferably as Groove, such as shown in Figure 2.
- the Grooves start upstream at the transition from that Valve closing body 4 to the guide pin 31 and extend in the axial direction over the entire length of the guide pin 31. In the radial direction, the Grooves closed by the valve seat body 5 to form channels.
- the fuel flows when the valve closing body 5 is lifted off past the valve closing body 5 into the grooves and finally arrives at the spray opening 7.
- the spiral version of the grooves is the emerging one Fuel has a swirl and fans out after it emerges the spray opening 7 in the combustion chamber, not shown.
- the flow-guiding elements 33 can alternatively also in the recess 32 may be arranged. They extend in axial direction from the valve seat 6 to Area of the spray opening 7 and are preferably used as Central axis 35 of the fuel injector 1 open grooves formed, which by the guide pin 31 at least on part of their axial extent to channels be closed. With the valve closing body lifted 4 the fuel flows into the preferably to produce swirl spiral grooves and fans according to the Exit of the spray opening 7.
- FIG 3A is a variant with a Beam deflection plate 34 shown.
- the beam deflector 34 has an upstream side which is connected to the Shape of the downstream side of the valve seat body 5 corresponds and is downstream of the valve seat body 5 attached in a manner not shown.
- the central axis 36 the spray opening 7 is opposite the central axis 35 of the Fuel injector 1 deflected.
- the location and Geometry of the upstream end of the spray port 7 in the beam deflection plate 34 is the position and geometry of the Recess 32 accordingly.
- FIG. 3B shows a further exemplary embodiment of a Beam deflection shown.
- the spray opening 7 is whose central axis 36 relative to the central axis 35 of the Fuel injector 1 is deflected, e.g. by Drilling in the valve seat body 5 downstream of the Recess 32 introduced.
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
- Figur 1
- einen schematischen Teilschnitt durch ein erfindungsgemäßes Brennstoffeinspritzventil;
- Figur 2
- einen schematischen Teilschnitt im Ausschnitt II der Figur 1 durch ein Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils,
- Figur 3A
- einen schematischen Teilschnitt im Ausschnitt III der Figur 2 durch ein zweites Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils und
- Figur 3B
- einen schematischen Teilschnitt im Ausschnitt III der Figur 2 durch ein drittes Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils.
- 1
- Brennstoffeinspritzventil
- 2
- Düsenkörper
- 3
- Ventilnadel
- 4
- Ventilschließkörper
- 5
- Ventilsitzkörper
- 6
- Ventilsitzfläche
- 7
- Abspritzöffnung
- 8
- Dichtung
- 9
- Außenpol
- 10
- Magnetspule
- 11
- Spulengehäuse
- 12
- Spulenträger
- 13
- Innenpol
- 14
- Ventilnadelführung
- 15
- Einstellscheibe
- 16
- zentrale Brennstoffzufuhr
- 17
- Steckkontakt
- 18
- Kunststoffummantelung
- 19
- elektrische Leitung
- 20
- Anker
- 21
- Flansch
- 22
- Schweißnaht
- 23
- Rückstellfeder
- 24
- Hülse
- 25
- Filterelement
- 26
- Spalt
- 27
- Arbeitsspalt
- 28
- Dichtung
- 29
- Verbindungsbauteil
- 30a, 30b
- Brennstoffkanal
- 31
- Führungszapfen
- 32
- Ausnehmung
- 33
- strömungsführendes Element
- 34
- Strahlablenkscheibe
- 35
- Mittelachse des Brennstoffeinspritzventils
- 36
- Mittelachse der Abspritzöffnung
- 37
- Durchgangsöffnung
Claims (11)
- Brennstoffeinspritzventil (1) für Brennstoffeinspritzanlagen von Brennkraftmaschinen mit zumindest einer Abspritzöffnung (7) und einer Ausnehmung (32) zur Führung eines Ventilschließkörpers (4), der mit einer Ventilsitzfläche (6) eines Ventilsitzkörpers (5) zu einem Dichtsitz zusammenwirkt, wobei im Bereich der Führung des Ventilschließkörpers (4) zumindest ein strömungsführendes Element (33) angeordnet ist,
dadurch gekennzeichnet, daß der Ventilschließkörper (4) einen Führungszapfen (31) aufweist, der mit der stromabwärts des Dichtsitzes angeordneten Ausnehmung (32) des Ventilsitzkörpers (5) zu einer axialen Führung zusammenwirkt. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß das strömungsführende Element (33) an dem Führungszapfen (31) ausgebildet ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, daß das strömungsführende Element (33) in der Ausnehmung (32) des Ventilsitzkörpers (5) ausgebildet ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß das strömungsführende Element (33) als Nut ausgebildet ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß das strömungsführende Element (33) zur Drallbildung spiralförmig ausgebildet ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß das strömungsführende Element (33) einen veränderlichen Querschnitt aufweist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß das strömungsführende Element (33) durch Schleifen einbringbar ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß das strömungsführende Element (33) durch Kaltumformen einbringbar ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß die Abspritzöffnung (7) sich durch eine Strahlablenkscheibe (34) angeordnet erstreckt. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, daß die Mittelachse (36) der Abspritzöffnung (7) einen Winkel mit der Mittelachse (35) des Brennstoffeinspritzventils (1) einschließt. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß der Führungszapfen (31) mit der Ausnehmung (32) des Ventilsitzkörpers (5) zu einer hydraulischen Dichtung zusammenwirkt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2000151896 DE10051896A1 (de) | 2000-10-19 | 2000-10-19 | Brennstoffeinspritzventil |
| DE10051896 | 2000-10-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1213474A2 true EP1213474A2 (de) | 2002-06-12 |
| EP1213474A3 EP1213474A3 (de) | 2004-01-07 |
Family
ID=7660362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01124664A Withdrawn EP1213474A3 (de) | 2000-10-19 | 2001-10-16 | Brennstoffeinspritzventil |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1213474A3 (de) |
| JP (1) | JP2002138924A (de) |
| DE (1) | DE10051896A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009001131A1 (de) * | 2008-12-09 | 2010-06-10 | Robert Bosch Gmbh | Kraftstoffinjektor |
| JP5617892B2 (ja) * | 2012-10-12 | 2014-11-05 | トヨタ自動車株式会社 | 燃料噴射弁 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2543805A1 (de) | 1975-10-01 | 1977-04-14 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares einspritzventil |
| DE4231448C1 (de) | 1992-09-19 | 1993-10-21 | Bosch Gmbh Robert | Elektromagnetisch betätigbares Brennstoffeinspritzventil |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR765971A (fr) * | 1933-03-16 | 1934-06-19 | Perfectionnements aux injecteurs de moteurs à combustion interne | |
| CH204340A (de) * | 1938-02-28 | 1939-04-30 | Scintilla Ag | Brennstoffeinspritzvorrichtung bei Brennkraftmaschinen. |
| DE855486C (de) * | 1941-10-09 | 1952-11-13 | Bosch Gmbh Robert | Einspritzventil fuer Brennkraftmaschinen |
| GB676535A (en) * | 1949-08-09 | 1952-07-30 | Cav Ltd | Liquid fuel injection nozzles for internal combustion engines |
| JPS59206672A (ja) * | 1983-05-11 | 1984-11-22 | Toyota Motor Corp | 内燃機関の燃料噴射弁 |
| JPH01240763A (ja) * | 1988-03-18 | 1989-09-26 | Mitsubishi Heavy Ind Ltd | 燃料噴射弁 |
| JPH08158989A (ja) * | 1994-12-07 | 1996-06-18 | Nippondenso Co Ltd | 燃料噴射ノズル |
| JPH10176630A (ja) * | 1996-12-13 | 1998-06-30 | Daihatsu Motor Co Ltd | ディーゼル機関用燃料噴射ノズル |
| JP3885853B2 (ja) * | 1998-10-28 | 2007-02-28 | 株式会社デンソー | 燃料噴射ノズル |
-
2000
- 2000-10-19 DE DE2000151896 patent/DE10051896A1/de not_active Withdrawn
-
2001
- 2001-10-16 EP EP01124664A patent/EP1213474A3/de not_active Withdrawn
- 2001-10-19 JP JP2001322689A patent/JP2002138924A/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2543805A1 (de) | 1975-10-01 | 1977-04-14 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares einspritzventil |
| DE4231448C1 (de) | 1992-09-19 | 1993-10-21 | Bosch Gmbh Robert | Elektromagnetisch betätigbares Brennstoffeinspritzventil |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10051896A1 (de) | 2002-05-02 |
| EP1213474A3 (de) | 2004-01-07 |
| JP2002138924A (ja) | 2002-05-17 |
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| RIC1 | Information provided on ipc code assigned before grant |
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Effective date: 20050315 |