EP1308618A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1308618A1 EP1308618A1 EP02022008A EP02022008A EP1308618A1 EP 1308618 A1 EP1308618 A1 EP 1308618A1 EP 02022008 A EP02022008 A EP 02022008A EP 02022008 A EP02022008 A EP 02022008A EP 1308618 A1 EP1308618 A1 EP 1308618A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- taper
- fuel injection
- closing body
- injection valve
- 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.)
- Granted
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
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- 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
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
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- 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
- F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
- F02M2200/505—Adjusting spring tension by sliding spring seats
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- 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
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- 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
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
Definitions
- the invention is based on a fuel injector according to the genus of the main claim.
- DE 197 36 682 A1 describes a fuel injector known, which is characterized in that on downstream end of the valve a guide and Seating area is provided by three disc-shaped Elements is formed. There is a swirl element between a guide element and a valve seat element embedded.
- the guide element serves to guide it protruding, axially movable valve needle, while a Valve closing section of the valve needle with a Valve seat surface of the valve seat element cooperates.
- the Swirl element has an inner opening area multiple swirl channels that are not related to the outer circumference of the swirl element are connected. The whole Opening area extends completely over the axial Thickness of the swirl element.
- a disadvantage of the from the above publication known fuel injector is in particular that the starting flow of the fuel injector fuel flowing through, especially in the partial load range Injection quantities to vibrate both in Mass flow as well as in the beam angle leads. This is neither the spraying behavior of an individual Fuel injector still that of a whole of fuel injection valves of an internal combustion engine reproducible.
- the fuel injector according to the invention with the has characteristic features of the main claim in contrast, the advantage that by tapering the the valve needle formed valve closing body in Area of a swirl element an additional that Swirl chamber increasing volume is created, which dampens the vibrations when the flow starts, Inhomogeneities in the flow are reduced and therefore one more precise metering in the partial load range and a better one Reproducibility of mass flow and beam angle allows.
- the tapering of the Valve closing body in the area of the swirl element or on the inflow side in addition to an optimal To achieve damping behavior.
- Another advantage is that the taper is easier Way by turning or grinding the valve closing body can be produced and the shape of the other components can remain unchanged.
- Another advantage is that depending on the design of the Fuel injection valve the damping behavior through a cylindrical or concave shape adapted to the taper can be. This can also be at least partially in shape a groove on the valve closing body.
- Fuel injector 1 is in the Form of a fuel injector 1 for Fuel injection systems from mixture-compressing, spark-ignition internal combustion engines.
- the Fuel injection valve 1 is particularly suitable for not directly injecting fuel into one Shown combustion chamber of an 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 operatively connected to 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 opening fuel injector 1, which has a Spray opening 7 has.
- the nozzle body 2 is through a Seal 8 against an outer pole 9 of a magnet coil 10 sealed.
- the magnet coil 10 is in a coil housing 11 encapsulated and wound on a bobbin 12, which bears against an inner pole 13 of the magnet coil 10.
- the Inner pole 13 and outer pole 9 are through a constriction 26 separated from each other and not by one another ferromagnetic connecting member 29 connected.
- the Solenoid 10 is connected via a line 19 from one to the other an electrical plug contact 17 feedable 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 shim 15 is used for stroke adjustment the other side of the shim 15 is the Anchor 20.
- This stands over a first flange 21 non-positively in connection with the valve needle 3, which through a weld seam 22 with the first flange 21 connected is.
- One is supported on the first flange 21
- Return spring 23 which in the present design of the Fuel injector 1 through a sleeve 24 Bias is brought.
- the fuel is about one central fuel supply 16 and supplied by a Filter element 25 filtered.
- the fuel injector 1 is no further by a seal 28 against one fuel line shown sealed.
- a annular damping element 32 On the spray side of the armature 20 is a annular damping element 32, which consists of a Elastomer material is arranged. It's on one second flange 31, which has a weld seam 33 is non-positively connected to the valve needle 3.
- a swirl element 34 is arranged on the valve seat body 5, which by a swirl chamber 35 of the Valve closing body 4 is penetrated.
- the swirl element 34 is mated by a guide element 36 mated on the inlet side held in contact on the valve seat body 5.
- valve needle 3 of the Fuel injector 1 and / or with the Valve needle 3 connected valve closing body 4 in the area of the swirl element 34 has a taper 37 which extends from an inlet side 38 of the swirl element 34 to Sealing seat extends. Due to the taper 37 Swirl chamber 35 extends radially, which results in a damping of the Fuel flow when opening the Fuel injector 1 results, whereby Vibrations or inhomogeneities in the mass flow and in Beam angle can be reduced.
- FIG. 2 A detailed Presentation of the measures according to the invention and the The function of fuel injector 1 is shown in FIG. 2 as well as the following description.
- Fig. 2 shows an excerpted sectional view 1 marked with II in FIG. 1 from the one in FIG. 1 illustrated embodiment of an invention configured fuel injector 1.
- Matching components are with matching Provide reference numerals.
- the taper 37 extends between the sealing seat, being already on a contact surface 40 abutting the valve seat surface 6 of the valve closing body 4 begins, at least up to one inlet end 38 of the swirl element 34.
- the Valve closing body 4 therefore passes through the swirl element 34 with its tapered end entirely or at least partially.
- the increase in Volume of the swirl chamber 35 for example 80% compared to conventional arrangement.
- the taper 37 of the valve closing body 4 can in seen in the axial direction cylindrical or concave or as a groove 41, which is indicated by a broken line in Fig. 2 is to be executed.
- the taper 37 may be the secure sealing against the combustion chamber pressure accordingly dimensioned contact surface 40, which on Valve closing body 4 is formed and with the Valve seat surface 6 of the valve seat body corresponds, do not interfere.
- the one formed in Fig. 2 on the valve closing body 4 Taper 37 is concave and continues axially in the feed direction on the valve closing body 4, whereby a further improve the inpatient, calm down Flow behavior when opening the Fuel injector 1 can be achieved.
- the groove 41 indicated by the dashed line represents another possibility for enlarging the swirl chamber 35 which does not further impair the rest Functional values of the fuel injector 1 after itself draws.
- the invention is not based on the illustrated Embodiment limited and for any design of fuel injectors 1 suitable.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- Fig. 1
- einen schematischen Schnitt durch ein Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoff einspritzventils, und
- Fig. 2
- einen schematischen Ausschnitt aus dem in Fig. 1 dargestellten Ausführungsbeispiel des erfindungsgemäßen Brennstoffeinspritzventils im Bereich II in Fig. 1.
Claims (8)
- Brennstoffeinspritzventil (1), insbesondere zum direkten Einspritzen von Brennstoff in einen Brennraum einer Brennkraftmaschine, mit einem Aktor (10), der mit einer Ventilnadel (3) in Wirkverbindung steht, wobei die Ventilnadel (3) an ihrem abspritzseitigen Ende einen Ventilschließkörper (4) aufweist, der mit einer Ventilsitzfläche (6), die an einem Ventilsitzkörper (5) ausgebildet ist, zu einem Dichtsitz zusammenwirkt, und der Ventilschließkörper (4) ein Drallelement (34) durchgreift, welches an einer zulaufseitigen Stirnfläche (39) des Ventilsitzkörpers (5) angeordnet ist,
dadurch gekennzeichnet, daß die Ventilnadel (3) und/oder der Ventilschließkörper (4) im Bereich des Drallelements (34) eine Verjüngung (37) aufweist, welche die radiale Ausdehnung der Ventilnadel (3) reduziert, wobei sich die Verjüngung (37) in axialer Richtung zumindest zwischen dem Dichtsitz und einer zulaufseitigen Stirnseite (38) des Drallelements (34) erstreckt. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß das Drallelement (34) und die Ventilnadel (3) und/oder der Ventilschließkörper (4) eine Drallkammer (35) begrenzen. - Brennstoffeinspritzventil nach Anspruch 2,
dadurch gekennzeichnet, daß die Verjüngung (37) im Bereich der Drallkammer (35) des Drallelements (34) ausgebildet ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Verjüngung (37) das Volumen der Drallkammer (35) radial vergrößert. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Verjüngung (37) mittels Abdrehen oder Schleifen der Ventilnadel (3) und/oder des Ventilschließkörpers (4) hergestellt ist. - Brennstoff einspritzventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Verjüngung (37) zumindest abschnittsweise zylindrisch ausgeformt ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Verjüngung (37) zumindest abschnittsweise konkav ausgeformt ist. - Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Verjüngung (37) zumindest abschnittsweise in Form einer Nut (41) ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10153627A DE10153627A1 (de) | 2001-10-31 | 2001-10-31 | Brennstoffeinspritzventil |
DE10153627 | 2001-10-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1308618A1 true EP1308618A1 (de) | 2003-05-07 |
EP1308618B1 EP1308618B1 (de) | 2004-12-29 |
Family
ID=7704267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02022008A Expired - Lifetime EP1308618B1 (de) | 2001-10-31 | 2002-10-01 | Brennstoffeinspritzventil |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1308618B1 (de) |
JP (1) | JP2003148281A (de) |
DE (2) | DE10153627A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE365752C (de) * | 1920-04-15 | 1922-12-21 | Samuel White & Company Ltd J | Zerstaeuber fuer fluessige Brennstoffe |
US5288025A (en) * | 1992-12-18 | 1994-02-22 | Chrysler Corporation | Fuel injector with a hydraulically cushioned valve |
DE19625059A1 (de) * | 1996-06-22 | 1998-01-02 | Bosch Gmbh Robert | Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors |
DE19736682A1 (de) * | 1997-08-22 | 1999-02-25 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
-
2001
- 2001-10-31 DE DE10153627A patent/DE10153627A1/de not_active Withdrawn
-
2002
- 2002-10-01 DE DE50201879T patent/DE50201879D1/de not_active Expired - Fee Related
- 2002-10-01 EP EP02022008A patent/EP1308618B1/de not_active Expired - Lifetime
- 2002-10-29 JP JP2002314493A patent/JP2003148281A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE365752C (de) * | 1920-04-15 | 1922-12-21 | Samuel White & Company Ltd J | Zerstaeuber fuer fluessige Brennstoffe |
US5288025A (en) * | 1992-12-18 | 1994-02-22 | Chrysler Corporation | Fuel injector with a hydraulically cushioned valve |
DE19625059A1 (de) * | 1996-06-22 | 1998-01-02 | Bosch Gmbh Robert | Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors |
DE19736682A1 (de) * | 1997-08-22 | 1999-02-25 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
Also Published As
Publication number | Publication date |
---|---|
EP1308618B1 (de) | 2004-12-29 |
DE10153627A1 (de) | 2003-11-06 |
JP2003148281A (ja) | 2003-05-21 |
DE50201879D1 (de) | 2005-02-03 |
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