EP1350947A2 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1350947A2 EP1350947A2 EP20030001838 EP03001838A EP1350947A2 EP 1350947 A2 EP1350947 A2 EP 1350947A2 EP 20030001838 EP20030001838 EP 20030001838 EP 03001838 A EP03001838 A EP 03001838A EP 1350947 A2 EP1350947 A2 EP 1350947A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide
- fuel
- fuel injection
- valve
- flow
- 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
-
- 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
-
- 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
- F02M51/0675—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 the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
- F02M51/0678—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 the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
-
- 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
-
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
Definitions
- the invention is based on a fuel injector according to the genus of the main claim.
- the sealing effect of the Guide body in interaction with the valve closing body should last for the entire life of the Make sure that the fuel injection valve Swirl development in the swirl chamber is not permitted large inflow of swirled fuel from the Lead gap between the guide body and Valve closing body is significantly affected as otherwise the spray pattern or the spray angle in the Heated fuel cloud impermissible changed. Because wear and manufacturing tolerances differ from Do not let guide body and valve needle tip be avoided, they have to be considered. Because the swirl development or the twist intensity due to the design features of the fuel injector is fixed and a certain fuel leakage from swirled fuel taken into account, the increase in leakage from unswirled fuel due to wear and tear of the Leadership gap only move within certain narrow limits.
- the fuel injector according to the invention with the characteristic features of the main claim has the Advantage that it causes lower manufacturing costs because the leadership game of leadership, which consists of a Guide section of the valve closing body and the Guide body is formed, a larger one May have manufacturing tolerance without a impermissibly large spread of leakage from unswirled Fuel in the swirl chamber develops during operation and / or due to manufacturing tolerances. This will achieved by the flow channels according to the invention, the increase the leakage flow and cause changes in the Leakage due to manufacturing tolerances and / or increases in Leakage due to wear in the course of the guide compared to Total fuel flow is less significant and thus less impact on swirl development.
- the invention can be particularly advantageous in Spherical fuel injectors Valve closing bodies are used. With such valves is the hydraulic seal, due to the short Guide section of the valve closing body through the Sphere equator is formed, and the resulting short Sealing length of the guide course, increased depending on Guide play. With such valves the increase in flow is without the inventive measure with initially small Leading game due to the expansion of the game Wear increases exponentially. Also a leadership game widened by manufacturing tolerances causes an increased exponentially increased flow through the guide gap.
- valve according to the invention causes less Manufacturing costs because the manufacturing tolerances are more generous can be chosen without an impermissible Impairment of the swirl development are accepted have to.
- the cross section of the or Flow channels dimensioned so large that the turning point, from the increase in flow of the leakage current over the Leadership game no longer rises, but falls, already at the beginning of the life of the fuel injector has been reached or exceeded.
- the flattening function the influence of manufacturing tolerances and wear in the area of the management course that from a guide portion of the valve closing body and the Guide body is formed, further reduced.
- the guide body can be especially the manufacture easier to adapt to manufacturing conditions.
- Circular segmental flow channels so-called surface grinding, can be particularly advantageous on spherical Realize valve closing bodies.
- the first embodiment shown in FIG 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 stands with a valve closing body 4 in Active connection with one on a valve seat body 5 arranged valve seat surface 6 to a sealing seat interacts.
- the fuel injector 1 is acting it is an inward opening in the exemplary embodiment Fuel injector 1.
- the nozzle body 2 is against the by a seal 8 Sealed outer pole 9 of a magnetic coil 10.
- the solenoid 10 is encapsulated in a coil housing 11 and on one Coil carrier 12 wound, which on an inner pole 13 of the Solenoid 10 is present.
- the inner pole 13 and the outer pole 9 are separated from each other by a gap 26 and support itself on a connecting component 29.
- the solenoid 10 is via a line 19 from an electrical Plug contact 17 energized electrical current.
- the Plug contact 17 is from a plastic sheath 18 surrounded, which may be molded onto the inner pole 13.
- 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 a 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.
- a second flange 31, which with the valve needle 3 over a weld 33 is connected serves as the lower one Armature stop.
- Fuel channels 30a and 30b Run in the valve needle guide 14 and in the armature 20 Fuel channels 30a and 30b.
- the fuel is about one central fuel supply 16 and supplied by a Filter element 25 filtered.
- a swirl device 42 forming swirl disk 43 are swirl channels 34 both for Fuel line and also provided for swirl generation.
- the fuel injector 1 is through a seal 28 against a fuel supply not shown and a seal 41 against a not shown Sealed cylinder head.
- valve needle 3 If the coil current is switched off, the armature 20 falls sufficient degradation of the magnetic field by the force of the Return spring 23 from the inner pole 13, whereby the valve needle 3 is in operative connection with the flange 21 moved against the stroke direction. The valve needle 3 will thereby moving in the same direction, causing the Valve closing body 4 is placed on the valve seat 6 and the fuel injector 1 is closed.
- the part shown enlarged in Fig. 2 spray-side end of the fuel injector according to the invention 1 from FIG. 1 includes in particular a Valve seat body 5, swirl channels 34, a swirl chamber 35, the Guide body 37 and a cylindrical Valve closing body 4 with flow channels 36
- Inflow of the fuel into the swirl chamber 35 forms a circumferentially directed swirl flow. simultaneously causes the negative pressure created in the swirl chamber 35, that through the leadership course that comes from the leadership section 38 of the valve closing body 4 and the guide body 37 is formed, fuel is sucked in in small quantities which is located upstream of the guide body 37.
- the flow channel extends 36 beyond the course of the management to increase the flow ensure the untwisted flow portion.
- the Valve closing body 4 is in this embodiment cylindrical, and the flow channels 36 are introduced in the valve closing body 4, axially extending Grooves.
- Fig. 3 shows a schematic sectional view second embodiment of the invention Fuel injector 1 similar to the first Embodiment, but with a spherical Valve closing body 4.
- Fuel injector 1 similar to the first Embodiment, but with a spherical Valve closing body 4.
- Fuel injector 1 similar to the first Embodiment, but with a spherical Valve closing body 4.
- Fuel into swirl chamber 35 through swirl channels 34 a negative pressure
- the fuel flows through the Leading gap 40, which results from the leading game between Guide body 37 and the guide portion 38 of the Valve closing body 4 results, and also by the shown flow channels 36.
- the flow channels 36 are the flow channels 36 as Surface grinding on the spherical valve closing body 4 introduced.
- Fig. 4 shows a third embodiment of the fuel injector 1 according to the invention in which the flow channels 36 along the inner surface of the Guide opening 39 introduced into the guide body 37 are.
- the invention is not shown on the Embodiments limited and z. B. for any Designs of fuel injection valves 1, in particular also for outward opening fuel injection valves 1, applicable.
- Fig. 5 shows the static flow rate Q Stat through the guide area as a function of the guide clearance sp for fuel injection valves 1.
- Fuel injection valves 1 without the flow channels 36 according to the invention are located in area I of FIG. 5, ie below the turning point sp w , so that an increase in the Guide play sp leads to an increase in the increase in the static flow rate dQ Stat / dsp.
- the flow channels 36 according to the invention shift into region II above the inflection point sp w .
- a wear-related increase in the play sp is associated with a decrease in the increase in the static flow rate dQ Stat / dsp, so that the wear has a less serious effect.
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 erstes Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils;
- Fig. 2
- einen schematischen Teilschnitt durch das in Fig. 1 dargestellte Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich des Ventilsitzkörpers;
- Fig. 3
- einen schematischen Teilschnitt durch ein zweites Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich des Ventilsitzkörpers, jedoch mit kugelförmigem Ventilschließkörper;
- Fig. 4
- einen schematischen Teilschnitt eines dritten Ausführungsbeispiels eines erfindungsgemäßen Brennstoffeinspritzventils mit Strömungskanälen, eingebracht entlang der Innenfläche der Führungsöffnung, und
- Fig. 5
- die statische Durchflußmenge Qstat als Funktion des Führungsspiels sp.
Claims (7)
- Brennstoffeinspritzventil (1), insbesondere zum direkten Einspritzen von Brennstoff in einen Brennraum einer Brennkraftmaschine, mit einer Ventilnadel (3), die an ihrem abspritzseitigen Ende einen Ventilschließkörper (4) aufweist, der mit einer Ventilsitzfläche (6), die an einem Ventilsitzkörper (5) ausgebildet ist, zu einem Dichtsitz zusammenwirkt, wobei ein Führungsabschnitt (38) des Ventilschließkörpers (4) zur Führung der Ventilnadel (3) in einem Führungskörper (37) dient, einer Dralleinrichtung (42) zur Erzeugung eines Dralls in einer Drallkammer (35) stromaufwärts des Dichtsitzes und einer stromabwärts des Dichtsitzes vorgesehenen Abspritzöffnung (7),
dadurch gekennzeichnet, daß in einen Führungsverlauf, der aus dem Führungsabschnitt (38) des Ventilschließkörpers (4) und dem Führungskörper (37) gebildet ist, mindestens ein Strömungskanal (36) eingebracht ist, welcher eine partielle Brennstoffzuleitung zu der Drallkammer (35) unter Umgehung der Dralleinrichtung (42) bewirkt. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß die Querschnittsform des zumindest einen Strömungskanals (36) halbkreisförmig oder kreissegmentförmig ist. - Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß sich die Querschnittsform des zumindest einen Strömungskanals (36) in Strömungsrichtung ändert. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß der Strömungsquerschnitt des zumindest einen Strömungskanals (36) mindestens so groß bemessen ist, daß bei einer Zunahme des Strömungsquerschnitts durch Verschleiß des Führungsspiels die Durchflußzunahme aufgrund des Strömungskanals (36) abnimmt. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß der zumindest eine Strömungskanal (36) in den Führungskörper (37) und/oder in den Führungsabschnitt (38) des Ventilschließkörpers (4) eingebracht ist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß der zumindest eine Strömungskanal (36) über den Führungsverlauf, der aus dem Führungsabschnitt (38) des Ventilschließkörpers (4) und dem Führungskörper (37) gebildet ist, hinaus verlängert ist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß der zumindest eine Strömungskanal (36) nicht parallel zur axialen Bewegungsrichtung des Ventilschließkörpers (4) verläuft.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10214904 | 2002-04-04 | ||
DE2002114904 DE10214904A1 (de) | 2002-04-04 | 2002-04-04 | Brennstoffeinspritzventil |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1350947A2 true EP1350947A2 (de) | 2003-10-08 |
EP1350947A3 EP1350947A3 (de) | 2004-05-12 |
EP1350947B1 EP1350947B1 (de) | 2006-01-11 |
Family
ID=27816140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030001838 Expired - Lifetime EP1350947B1 (de) | 2002-04-04 | 2003-01-29 | Brennstoffeinspritzventil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1350947B1 (de) |
DE (2) | DE10214904A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1541862A1 (de) * | 2003-12-10 | 2005-06-15 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60142051A (ja) * | 1983-12-28 | 1985-07-27 | Toyota Motor Corp | 内燃機関の燃料噴射弁 |
US5163621A (en) * | 1989-12-12 | 1992-11-17 | Nippondenso Co., Ltd. | Fuel injection valve having different fuel injection angles at different opening amounts |
WO2002044550A1 (de) * | 2000-11-28 | 2002-06-06 | Robert Bosch Gmbh | Brennstoffeinspritzanlage |
WO2002050428A1 (de) * | 2000-12-19 | 2002-06-27 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
-
2002
- 2002-04-04 DE DE2002114904 patent/DE10214904A1/de not_active Withdrawn
-
2003
- 2003-01-29 DE DE50302146T patent/DE50302146D1/de not_active Expired - Lifetime
- 2003-01-29 EP EP20030001838 patent/EP1350947B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60142051A (ja) * | 1983-12-28 | 1985-07-27 | Toyota Motor Corp | 内燃機関の燃料噴射弁 |
US5163621A (en) * | 1989-12-12 | 1992-11-17 | Nippondenso Co., Ltd. | Fuel injection valve having different fuel injection angles at different opening amounts |
WO2002044550A1 (de) * | 2000-11-28 | 2002-06-06 | Robert Bosch Gmbh | Brennstoffeinspritzanlage |
WO2002050428A1 (de) * | 2000-12-19 | 2002-06-27 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 009, no. 307 (M-435), 4. Dezember 1985 (1985-12-04) & JP 60 142051 A (TOYOTA JIDOSHA KK), 27. Juli 1985 (1985-07-27) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1541862A1 (de) * | 2003-12-10 | 2005-06-15 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Also Published As
Publication number | Publication date |
---|---|
EP1350947A3 (de) | 2004-05-12 |
DE10214904A1 (de) | 2003-10-16 |
EP1350947B1 (de) | 2006-01-11 |
DE50302146D1 (de) | 2006-04-06 |
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