EP2409012B1 - Apparatus for injecting fuel into the combustion chamber of an internal combustion engine - Google Patents
Apparatus for injecting fuel into the combustion chamber of an internal combustion engine Download PDFInfo
- Publication number
- EP2409012B1 EP2409012B1 EP10710156.0A EP10710156A EP2409012B1 EP 2409012 B1 EP2409012 B1 EP 2409012B1 EP 10710156 A EP10710156 A EP 10710156A EP 2409012 B1 EP2409012 B1 EP 2409012B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protective plate
- armature
- chamber
- fuel
- coil
- 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.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims description 13
- 238000002485 combustion reaction Methods 0.000 title claims description 7
- 230000001681 protective effect Effects 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 210000002105 tongue Anatomy 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
Images
Classifications
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
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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
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0019—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of electromagnets or fixed 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
-
- 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
- F02M2200/08—Fuel-injection apparatus having special means for influencing magnetic flux, e.g. for shielding or guiding magnetic flux
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit
-
- 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
- F02M2200/90—Selection of particular materials
- F02M2200/9053—Metals
- F02M2200/9069—Non-magnetic metals
Definitions
- the invention relates to a device for injecting fuel into the combustion chamber of an internal combustion engine comprising an injection nozzle with an axially displaceable nozzle needle, which can be acted upon to control its opening and closing movement of the pressure prevailing in a fuel-filled control chamber pressure in the axial direction is controlled in the control chamber via an at least one inlet or outlet channel for fuel opening or closing solenoid valve, in which a coil having a coil coil cooperates with an armature and the armature is pressed against a valve seat valve closure member, wherein the armature arranged in an armature space is, in which the inlet and outlet channel opens and the solenoid is covered on the armature space side of a metallic protective plate and wherein the protective plate is annular and in which the coil receiving annular cavity of Magnetventi Is arranged ls or the cavity covering.
- servo-controlled injection injectors for internal combustion engines, in particular in common-rail injection systems, the control of the injection takes place with the aid of a solenoid valve.
- the solenoid valve controls the outflow of fuel from the control chamber of an injection nozzle.
- a servo-controlled injection injector according to the prior art is in Fig. 1 shown.
- Fig. 1 shows the schematic structure of a modular common rail injection system. From the fuel tank 1 is with a Pre-feed pump 2 sucked fuel and brought from the high-pressure pump 3 to the required system pressure and fed to the injection injector 4.
- the injector 4 consists of an injection nozzle 5, a throttle plate 6, a solenoid valve 7, a (not shown) with a high pressure accumulator equipped injector body 8 and a nozzle retaining nut 9, which holds the parts together.
- the solenoid valve 7 In the idle state, the solenoid valve 7 is closed, so that high-pressure fuel from the high-pressure bore 10 via the transverse groove 11 and the inlet throttle 12 flows into the control chamber 13 of the nozzle 5, the outflow from the control chamber 13 via the outlet throttle 14 but is blocked on the valve seat 15 of the solenoid valve 7 , The voltage applied in the control chamber 13 system pressure presses together with the force of the nozzle spring 16, the nozzle needle 17 in the nozzle needle seat 18, so that the injection holes 24 are closed.
- the solenoid valve 7 If the solenoid valve 7 is actuated by controlling the electromagnet and the solenoid valve member 27 is lifted against the force of the solenoid valve spring 26 from the valve seat 15, it releases the flow through the valve seat 15, and fuel flows from the control chamber 13 through the outlet throttle 14, the Solenoid valve armature chamber 19, the outlet column 20, the discharge hole 21 and the low-pressure bore 22 back into the fuel tank 1. It sets a defined by the flow cross-sections of inlet throttle 12 and outlet throttle 14 equilibrium pressure in the control chamber 13, which is so low that in the nozzle chamber 23rd applied system pressure in the nozzle body 29 longitudinally displaceable guided nozzle needle 17 is able to open, so that the injection holes 24 are released and the injection takes place.
- the present invention now aims to avoid such damage due to cavitation erosion.
- the injection device of the type mentioned is substantially further developed such that the annular protective plate is held in the cavity of the magnet pot by means of the protective plate cross tabs and the tongues are formed from the material of the magnet pot, preferably by pressing a projecting Teeth having caulking.
- the armature space facing surface of the magnetic coil, ie, the cavitation exposed side of the solenoid is effectively protected by the arrangement of a metallic protective plate from damage.
- the protective plate is of annular design and in which the annular cavity of the magnet pot or the cavity is arranged covering the coil.
- the definition of the protective plate according to the invention is achieved in that the annular protective plate is contained in the cavity of the magnet pot with the aid of the protective plate cross tongues, the tongues are formed with advantage of the material of the magnet pot, preferably by pressing a projecting teeth having caulking.
- a preferred development also provides that the protective plate is pressed into the magnet pot. This has the advantage of easy installation with sufficiently high holding power.
- the inventive arrangement of a metallic protective plate naturally entails the risk that the operation of the electromagnet is impaired. In particular, it can lead to a disturbance of the magnetic field lines.
- the protective plate consists of a metal which does not disturb the magnetic field lines, preferably of stainless steel.
- FIG.2 a detailed view of an injection injector according to Fig. 1 who wears the protective plate, Figure 3 a known design and Figure 4 the inventive execution.
- Fig.2 shows a known embodiment of a magnetic pot 25.
- a metal plate 30 is mounted for protection, which is pressed at its side edges 31 in the magnet pot 25.
- the metal plate 30 is preferably such that it does not disturb the structure of the magnetic field lines in the magnetic circuit, for example by using a stainless steel.
- Figure 3 shows a known embodiment.
- the metal disc 30 is welded at the locations 32 with the magnetic pot 25.
- FIG. 4 shows the embodiment according to the invention.
- the metal disk 30 is loosely inserted in the magnetic pot 25 in front of the magnetic coil 28 in a first step.
- a caulking tool 33 which has teeth 34 protruding several times on the circumference, preferably six to eight times inside and outside the coil window, is caulked.
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)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine umfassend eine Einspritzdüse mit einer axial verschieblichen Düsennadel, welche zur Steuerung ihrer Öffnungs- und schließbewegung von dem in einem mit Kraftstoff gefüllten Steuerraum herrschenden Druck in axialer Richtung beaufschlagbar ist, wobei der Druck im Steuerraum über ein wenigstens einen Zu- oder Ablaufkanal für Kraftstoff öffnendes oder schließendes Magnetventil gesteuert wird, bei welchem eine einen Wicklungsträger aufweisende Spule mit einem Anker zusammenwirkt und mit dem Anker ein gegen einen Ventilsitz pressbares Ventilschließglied gekuppelt ist, wobei der Anker in einem Ankerraum angeordnet ist, in welchen der Zu- bzw. Ablaufkanal mündet und die Magnetspule ankerraumseitig von einer metallischen Schutzplatte abgedeckt ist und wobei die Schutzplatte ringförmig ausgebildet ist und in dem die Spule aufnehmenden ringförmigen Hohlraum des Magnetventils oder den Hohlraum abdeckend angeordnet ist.The invention relates to a device for injecting fuel into the combustion chamber of an internal combustion engine comprising an injection nozzle with an axially displaceable nozzle needle, which can be acted upon to control its opening and closing movement of the pressure prevailing in a fuel-filled control chamber pressure in the axial direction is controlled in the control chamber via an at least one inlet or outlet channel for fuel opening or closing solenoid valve, in which a coil having a coil coil cooperates with an armature and the armature is pressed against a valve seat valve closure member, wherein the armature arranged in an armature space is, in which the inlet and outlet channel opens and the solenoid is covered on the armature space side of a metallic protective plate and wherein the protective plate is annular and in which the coil receiving annular cavity of Magnetventi Is arranged ls or the cavity covering.
Eine derartige Vorrichtung ist der
Bei servogesteuerten Einspritzinjektoren für Brennkraftmaschinen, insbesondere in Common-Rail Einspritzsystemen, erfolgt die Steuerung der Einspritzung mit Hilfe eines Magnetventils. Das Magnetventil steuert den Abfluss von Kraftstoff aus dem Steuerraum einer Einspritzdüse. Ein servogesteuerter Einspritzinjektor gemäß dem Stand der Technik ist in
Wird das Magnetventil 7 betätigt, indem der Elektromagnet angesteuert und das Magnetventilglied 27 gegen die Kraft der Magnetventilfeder 26 aus dem Ventilsitz 15 gehoben wird, gibt es den Durchfluss über den Ventilsitz 15 frei, und Kraftstoff strömt aus dem Steuerraum 13 durch die Ablaufdrossel 14, den Magnetventilankerraum 19, die Ablaufspalte 20, die Entlastungbohrung 21 und die Niederdruckbohrung 22 zurück in den Kraftstofftank 1. Es stellt sich ein durch die Strömungsquerschnitte von Zulaufdrossel 12 und Ablaufdrossel 14 definierter Gleichgewichtsdruck im Steuerraum 13 ein, der so gering ist, dass der im Düsenraum 23 anliegende Systemdruck die im Düsenkörper 29 längs verschieblich geführte Düsennadel 17 zu öffnen vermag, sodass die Spritzlöcher 24 freigegeben werden und die Einspritzung erfolgt.If the
Aufgrund der Geometrie des Magnetventils 7 steht die eigentliche Magnetspule 28 (bestehend aus einem Kunststoff-Wicklungsträger und den Kupferdrahtsindungen) in direktem Kontakt mit Kraftstoff, sodass bei Auftreten von Kavitation im System insbesondere bei Kunststoffbauteilen, wie sie für den Wicklungsträger der Magnetspule 28 verwendet werden, Schäden infolge Kavitationserosion auftreten können. Kavitation entsteht dabei folgendermaßen:
- Bei geöffnetem Ventilsitz 15 liegt der Anker 27 direkt am Hubanachlag des Magnettopfes 25 auf, sodass nur mehr ein sehr kleiner Restluftspalt von 50 - 80 µm zwischen Anker 27 und Magnettopf 25 verbleibt. Wird der Magnet abgeschaltet, entsteht in diesem Restluftspalt infolge der Kraft der ventilfeder 26 ein derart starker Unterdruck, dass der im Restluftspalt vorhandene Kraftstoff für kurze Zeit zumindest teilweise verdampft. In weiterer Folge kommt es wieder zu einem Druckanstieg, sodass die Dampfblasen implodieren. Passiert dies an der Oberfläche des Wicklungsträgers der
Magnetspule 28, kommt es dort zu Kavitationserosion, die bei langen Laufzeiten bis zu den Kupferwicklungen derMagnetspule 28 vordringen und diese schließlich zerstören kann, was zum Ausfall desMagnetventils 7 führt.
- When the
valve seat 15 is open, the armature 27 rests directly on the Hubanachlag of themagnetic pot 25, so that only a very small residual air gap of 50 - 80 microns between armature 27 andmagnet pot 25 remains. If the magnet is switched off, such a strong negative pressure arises in this residual air gap as a result of the force of the valve spring 26 that the fuel present in the residual air gap at least partially evaporates for a short time. Subsequently, there is again a pressure increase, so that the steam bubbles implode. If this occurs on the surface of the winding support of themagnet coil 28, cavitation erosion occurs there, which, with long propagation times, can reach the copper windings of themagnet coil 28 and ultimately destroy them, which leads to failure of themagnet valve 7.
Die vorliegende Erfindung zielt nun darauf ab, derartige Schädigungen infolge von Kavitationserosion zu vermeiden.The present invention now aims to avoid such damage due to cavitation erosion.
Zur Lösung dieser Aufgabe ist die Einspritzvorrichtung der eingangs genannten Art im Wesentlichen derart weitergebildet, dass die ringförmige Schutzplatte in dem Hohlraum des Magnettopfes mit Hilfe von die Schutzplatte übergreifenden Zungen gehalten ist und die Zungen aus dem Material des Magnettopf geformt sind, vorzugsweise durch Aufdrücken eines vorspringende Zähne aufweisenden Verstemmwerkzeugs. Die dem Ankerraum zugewandte Fläche der Magnetspule, d.h. die der Kavitation ausgesetzte Seite der Magnetspule wird durch die Anordnung einer metallischen Schutzplatte wirksam vor einer Beschädigung geschützt. Durch diese baulich überaus einfach umzusetzende Maßnahme der Anordnung einer metallischen Schutzplatte gelingt es, Kavitationserosion am (Kunststoff-)Wicklungsträger wirkungsvoll zu verhindern, ohne dass am Wicklungsträger bauliche Änderungen oder Anpassungen oder Materialänderungen durchgeführt werden müssen. Dabei soll der Wicklungsträger selbst, insbesondere aber die Kupferwindungen der Spule des Magnetventils geschützt werden.To solve this problem, the injection device of the type mentioned is substantially further developed such that the annular protective plate is held in the cavity of the magnet pot by means of the protective plate cross tabs and the tongues are formed from the material of the magnet pot, preferably by pressing a projecting Teeth having caulking. The armature space facing surface of the magnetic coil, ie, the cavitation exposed side of the solenoid is effectively protected by the arrangement of a metallic protective plate from damage. By this structurally very simple measure to implement the arrangement of a metallic protective plate, it is possible to effectively prevent cavitation erosion on the (plastic) winding carrier without structural changes or adjustments or material changes having to be carried out on the winding carrier. In this case, the winding support itself, but in particular the copper turns of the coil of the solenoid valve should be protected.
Damit das Vorsehen der metallischen Schutzplatte eine möglichst geringe Gewichtserhöhung des Einspritzinjektors zur Folge hat, ist vorgesehen, dass die Schutzplatte ringförmig ausgebildet ist und in dem die Spule aufnehmenden ringförmigen Hohlraum des Magnettopfes oder den Hohlraum abdeckend angeordnet ist.In order for the provision of the metallic protective plate to result in the smallest possible increase in the weight of the injection injector, it is provided that the protective plate is of annular design and in which the annular cavity of the magnet pot or the cavity is arranged covering the coil.
Die Festlegung der Schutzplatte erfolgt erfindungsgemäß dadurch, dass die ringförmige Schutzplatte in dem Hohlraum des Magnettopfes mit Hilfe von die Schutzplatte übergreifenden Zungen gebalten ist, wobei die zungen mit vorteil aus dem Material des Magnettopfes geformt sind, vorzugsweise durch Aufdrücken eines vorspringende Zähne aufweisenden Verstemmwerkzeugs. Eine bevorzugte Weiterbildung sieht außerdem vor, dass die Schutzplatte in den Magnettopf eingepresst ist. Dies hat den Vorteil einer einfachen Montage bei gleichzeitig ausreichend hoher Haltekraft.The definition of the protective plate according to the invention is achieved in that the annular protective plate is contained in the cavity of the magnet pot with the aid of the protective plate cross tongues, the tongues are formed with advantage of the material of the magnet pot, preferably by pressing a projecting teeth having caulking. A preferred development also provides that the protective plate is pressed into the magnet pot. This has the advantage of easy installation with sufficiently high holding power.
Die erfindungsgemäße Anordnung einer metallischen Schutzplatte birgt naturgemäß die Gefahr, dass die Funktionsweise des Elektromagneten beeinträchtigt wird. Insbesondere kann es zu einer Störung der Magnetfeldlinien kommen. Um derartige negative Einflüsse zu verhindern, ist gemäß einer bevorzugten Ausbildung vorgesehen, dass die Schutzplatte aus einem die Magnetfeldlinien nicht störenden Metall, vorzugsweise aus nichtrostendem Stahl besteht.The inventive arrangement of a metallic protective plate naturally entails the risk that the operation of the electromagnet is impaired. In particular, it can lead to a disturbance of the magnetic field lines. In order to prevent such negative influences, it is provided according to a preferred embodiment that the protective plate consists of a metal which does not disturb the magnetic field lines, preferably of stainless steel.
Die Erfindung wird nachfolgend anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. In dieser zeigen
Claims (3)
- An apparatus for injecting fuel into the combustion chamber of an internal combustion engine, including an injection nozzle having an axially displaceable nozzle needle (17) to which the pressure present in a control chamber (13) filled with fuel can be applied in the axial direction to control the opening and closing movements of said needle, wherein the pressure in the control chamber (13) is controlled via a solenoid valve (7) opening or closing at least one inlet or outlet duct (12, 14) for fuel and in which a magnetic coil (28) cooperates with an armature (27) and a valve-closing member that can be pressed against a valve seat (15) is coupled to the armature (27), said armature (27) being disposed in an armature chamber (19) into which the inlet or outlet duct (14) opens and said magnetic coil (28) being covered by a metal protective plate (30) on the side of the armature chamber (19), and wherein the protective plate (30) is designed to be annular and is arranged in the annular cavity of the solenoid valve (7) receiving the coil (28), or in a manner covering said cavity, characterized in that the annular protective plate (30) is held in the cavity of the magnet pot (25) by the aid of tongues (35) overlapping the protective plate (30) and the tongues (35) are formed of the material of the magnet pot (25), preferably by pressing on a caulking tool (33) including projecting teeth (34).
- An apparatus according to claim 1, characterized in that the protective plate (30) is pressed into the magnet pot (25).
- An apparatus according to claim 1 or 2, characterized in that the protective plate (30) is made of a metal that does not interfere with the magnetic field lines, preferably stainless steel.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA425/2009A AT508049B1 (en) | 2009-03-17 | 2009-03-17 | DEVICE FOR INJECTING FUEL IN THE COMBUSTION ENGINE OF AN INTERNAL COMBUSTION ENGINE |
PCT/AT2010/000079 WO2010105282A1 (en) | 2009-03-17 | 2010-03-16 | Apparatus for injecting fuel into the combustion chamber of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2409012A1 EP2409012A1 (en) | 2012-01-25 |
EP2409012B1 true EP2409012B1 (en) | 2014-04-30 |
Family
ID=42167463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10710156.0A Active EP2409012B1 (en) | 2009-03-17 | 2010-03-16 | Apparatus for injecting fuel into the combustion chamber of an internal combustion engine |
Country Status (9)
Country | Link |
---|---|
US (1) | US8839765B2 (en) |
EP (1) | EP2409012B1 (en) |
JP (1) | JP5296920B2 (en) |
KR (1) | KR101487696B1 (en) |
CN (1) | CN102388216B (en) |
AT (1) | AT508049B1 (en) |
BR (1) | BRPI1009127A2 (en) |
RU (1) | RU2496024C2 (en) |
WO (1) | WO2010105282A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101328442B1 (en) * | 2012-05-15 | 2013-11-14 | 자동차부품연구원 | Injector for direct injection type diesel engine |
DE102012219978A1 (en) * | 2012-10-31 | 2014-04-30 | Robert Bosch Gmbh | Magnetic assembly for a solenoid valve |
DE102017109947B9 (en) | 2016-05-10 | 2023-08-03 | Denso Corporation | FUEL INJECTOR |
CN106050497B (en) * | 2016-05-19 | 2018-06-12 | 哈尔滨工程大学 | Variable control self-locking electromagnetic fuel injector |
CN114458508B (en) * | 2022-03-09 | 2022-12-13 | 哈尔滨工程大学 | Electromagnetic-permanent magnet coupled high-speed electromagnetic valve for realizing high dynamic response based on permanent magnet |
CN217926124U (en) * | 2022-09-28 | 2022-11-29 | 中国船舶集团有限公司第七一一研究所 | Electronic control oil injector and internal combustion engine |
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-
2009
- 2009-03-17 AT ATA425/2009A patent/AT508049B1/en active
-
2010
- 2010-03-16 BR BRPI1009127A patent/BRPI1009127A2/en not_active IP Right Cessation
- 2010-03-16 RU RU2011141859/06A patent/RU2496024C2/en not_active IP Right Cessation
- 2010-03-16 WO PCT/AT2010/000079 patent/WO2010105282A1/en active Application Filing
- 2010-03-16 CN CN201080012493.0A patent/CN102388216B/en active Active
- 2010-03-16 US US13/257,139 patent/US8839765B2/en active Active
- 2010-03-16 EP EP10710156.0A patent/EP2409012B1/en active Active
- 2010-03-16 JP JP2012500002A patent/JP5296920B2/en active Active
- 2010-03-16 KR KR20117024437A patent/KR101487696B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
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JP5296920B2 (en) | 2013-09-25 |
KR101487696B1 (en) | 2015-01-29 |
US8839765B2 (en) | 2014-09-23 |
CN102388216A (en) | 2012-03-21 |
AT508049B1 (en) | 2016-01-15 |
BRPI1009127A2 (en) | 2016-03-01 |
EP2409012A1 (en) | 2012-01-25 |
WO2010105282A1 (en) | 2010-09-23 |
KR20110128207A (en) | 2011-11-28 |
RU2496024C2 (en) | 2013-10-20 |
AT508049A1 (en) | 2010-10-15 |
US20120006301A1 (en) | 2012-01-12 |
JP2012520957A (en) | 2012-09-10 |
RU2011141859A (en) | 2013-04-27 |
CN102388216B (en) | 2014-07-09 |
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