EP1861617A1 - Fuel injection device - Google Patents

Fuel injection device

Info

Publication number
EP1861617A1
EP1861617A1 EP06708414A EP06708414A EP1861617A1 EP 1861617 A1 EP1861617 A1 EP 1861617A1 EP 06708414 A EP06708414 A EP 06708414A EP 06708414 A EP06708414 A EP 06708414A EP 1861617 A1 EP1861617 A1 EP 1861617A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
pressure
piston
electromagnetic
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
Application number
EP06708414A
Other languages
German (de)
French (fr)
Other versions
EP1861617B1 (en
Inventor
Andreas Posselt
Susanne Friedle
Andreas Gutscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1861617A1 publication Critical patent/EP1861617A1/en
Application granted granted Critical
Publication of EP1861617B1 publication Critical patent/EP1861617B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/027—Injectors structurally combined with fuel-injection pumps characterised by the pump drive electric
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/16—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps characterised by having multi-stage compression of fuel
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • the invention relates to a device for injecting fuel after the
  • the disadvantage is that this type of pressure boosting is very complicated and complicated.
  • the inventive device for injecting fuel with the characterizing features of the main claim has the advantage that the pressure gain in the fuel injector is simplified and made cheaper by at least one fuel injector, an electromagnetic pressure booster is arranged.
  • the electromagnetic pressure booster is connected directly upstream of the at least one fuel injection valve. In this way, only a very small volume is put on a higher pressure, so the energy expenditure for the pressure increase is low and the pressure increase can be reached in a very short time.
  • the electromagnetic pressure booster is plugged, clipped, welded or pressed onto an input channel of the fuel injection valve. These compounds are particularly simple and inexpensive.
  • the electromagnetic pressure booster is fluidly connected to a fuel line.
  • the electromagnetic pressure booster has an electromagnet with an exciter coil and an armature, wherein the armature is operatively connected to a piston mounted axially movable in a pressure chamber of the electromagnetic pressure booster, since such a pressure booster is particularly simple and is very inexpensive to produce.
  • the electromagnetic pressure booster has an inlet channel, which opens into the pressure chamber via an inlet opening and the
  • Pressure chamber having an outlet which is fluidly connected to an input channel of the fuel injection valve.
  • FIG. 1 shows a view of a fuel injection valve with an electromagnetic pressure booster
  • FIG. 2 shows a first exemplary embodiment
  • FIG. 3 shows a second exemplary embodiment of the electromagnetic pressure booster.
  • Fig.l shows a fuel injection valve with an electromagnetic pressure booster.
  • the device according to the invention has at least one fuel injection valve 1, which injects fuel, for example, in a direct injection into a combustion chamber of an internal combustion engine and in a suction tube injection into a so-called intake manifold of an internal combustion engine.
  • the at least one fuel injection valve 1 is fluidly connected to a fuel line 2, for example a fuel distributor, via which the at least one fuel injection valve 1 is supplied with fuel.
  • the fuel injection valve 1 is designed, for example, as an electromagnetic, piezoelectric or magnetstrictive valve, but can be designed explicitly as desired.
  • a delivery unit 3 is provided, which is designed for example as a flow pump and fuel from a reservoir 4 raises pressure in the fuel line 2 promotes.
  • the emissions of an internal combustion engine in a so-called cold start must be reduced.
  • the required pressure increase in the fuel line 2 is so high that it can not be achieved by the provided delivery unit 3.
  • the delivery unit 3 is followed by another second delivery unit, which is designed for example as a flow pump and increases the pressure in the fuel line to the required value, or it is used a more powerful and therefore more expensive delivery unit.
  • the invention provides for the at least one fuel injector 1 to arrange an electromagnetic pressure booster 5 for increasing the pressure.
  • at least one pressure booster 5 is provided on each fuel injection valve 1.
  • the at least one electromagnetic pressure booster 5 is connected directly upstream of the at least one fuel injection valve 1 and, for example, plugged, clipped, welded, pressed or the like onto an input channel 8 of the fuel injection valve 1. In this way, the electromagnetic pressure booster 5 is firmly connected to the fuel injection valve 1 and disposed directly on this.
  • the pressure of the fuel is not already increased in the fuel line 2, as in the prior art, but by means of the electromagnetic pressure booster 5 just before and / or in the fuel injection valve 1.
  • the volume within the fuel injection valve 1 is much smaller than the volume of the fuel line 2 from the reservoir 2 to the fuel injection valve 1, so much less energy is needed to increase the pressure.
  • the pressure increase in the fuel injection valve 1 is achieved faster by means of the electromagnetic pressure booster 5 than by means disposed in the fuel line 2, with respect to the flow connection further away from the fuel injection valve 1 conveying unit. 3
  • FIG. 2 shows a first embodiment of the electromagnetic pressure booster.
  • the electromagnetic pressure booster 5 is a redesigned electromagnetic injection valve, which is configured as described below, for example.
  • the electromagnetic pressure booster 5 has a housing 9, in which an electromagnet 7 with an exciter coil 10 and an axially movable armature 11 is arranged.
  • a pressure chamber 14 is provided in which a piston 15 operated by the electromagnet 7 is movable axially with respect to an axis 12 is arranged.
  • the armature 11, the piston 15 and / or the excitation coil 10 are, for example, arranged centrally with respect to the axis 12.
  • the armature 11 is annular over a part of its axial length surrounded by the exciter coil 10, which is arranged in a magnet pot 13.
  • An inlet channel 16 opens via an inlet opening 17 into the pressure chamber 14 of the pressure intensifier 5, for example at the circumference of the
  • Pressure chamber 14 The inlet channel 16 is fluidly connected to the upstream of the fuel line 2.
  • the pressure chamber 14 of the electromagnetic pressure booster 5 is flow-connected to the fuel injection valve 1 via an outlet 18.
  • the piston 15 of the electromagnetic pressure booster 5 is mechanically coupled to the armature 11 and connected thereto.
  • the piston 15 is moved by means of a return spring 21 into a first position, in which the piston 15 abuts, for example, against a stop 22 and in which the inlet opening 17 is opened into the pressure chamber 14.
  • the piston 15 is in this first position and thus enables emergency operation.
  • the armature 11 performs with the piston 15 from an axial stroke, for example in the direction of the fuel injection valve 1.
  • the piston 15 covers the inlet opening 17 after a first partial stroke and closes in this way the flow connection to
  • the inlet port 17 may also be closed in any other way, for example by a separate valve in the inlet channel 16. After closing the inlet opening 17, the further partial stroke of the piston 15 generates an increase in pressure in the pressure chamber 14 and in the part of the flow-connected to the outlet 18 of the electromagnetic pressure booster 5
  • the pressure booster 5 causes in this way shortly before the opening of the fuel injection valve 1, a pressure increase of the fuel.
  • the fuel injection valve 1 opens after reaching a predetermined pressure increase, at least part of the fuel pressure-increased by the electromagnetic pressure booster 5 is injected into the combustion chamber or into the intake manifold of the internal combustion engine.
  • the predetermined pressure increase is dependent on the respective operating state of the internal combustion engine and is in each case from parameters the engine controller calculates to open the fuel injector at an optimal time.
  • the housing 9 in the region of the coil 10 on a vent hole 30 to ensure pressure equalization.
  • the excitation coil 10 is de-energized, so that the piston 15 of the electromagnetic pressure booster 5 is moved by the force of the return spring 21 on the piston 15, starting from a second position back to the first position .becomes.
  • the inlet port 17 since the inlet port 17 is opened again, liquid flows from the inlet port 16 into the pressure chamber 14 and into the fuel injector 1 downstream of the outlet 18 of the electromagnetic pressure intensifier 5, replacing the amount of fuel injected at the last injection.
  • FIG 3 shows a second embodiment of the electromagnetic pressure booster.
  • the second embodiment of the electromagnetic pressure booster differs from the first embodiment in that the intake passage 16 is not affected by the
  • Piston 15 but is closed by an interaction of the armature 11 with the piston 15 and that seen in the axial direction between the coil 10 and the pressure chamber 14, an antechamber 23 is provided.
  • the inlet channel 16 does not open as in the first embodiment in the pressure chamber 14, but in the prechamber 23.
  • the armature 11 and the piston 15 are not integrally connected to each other in the second embodiment, but designed as separate parts, in the axial direction at least partially relative are arranged to move each other.
  • a first return spring 21.1 is provided, which is supported with its one end on the piston 15 and with its other end restoring to the Anchor 11 acts.
  • a second return spring 21.2 is arranged, which is supported with its one end on the housing 9 and with its other end resetting acts on the piston 15.
  • the first return spring 21.1 is made softer than the second return spring 21.2.
  • the inlet channel 16 is partially formed in the armature 11 and via at least one provided at anchor 11 inlet opening 17 centrally with respect to the axis 12 in the antechamber 23.
  • the inlet opening 17 but also at the periphery of the pre-chamber 23 and the inlet channel 16 is not in the anchor 11, but be provided separately or on the housing 9.
  • the armature 11, the piston 15 and / or the coil 10 are, for example, arranged centrally with respect to the axis 12.
  • the armature 11 has at its end facing the piston 15 a closing section 24, which is formed, for example, spherically.
  • the pre-chamber 23 is connected via a connection opening 25 with the
  • the piston 15 has a centrally arranged with respect to the axis 12 of the pressure chamber inlet 28, which has a beispeilweise conical valve seat 29 at the end facing the pre-chamber 23.
  • the valve seat 29 of the piston 15 acts after a predetermined axial stroke of the armature 11 with the closing portion 24 of the armature 11 together and opens or closes the
  • the piston 15 When energized exciter coil 10, the piston 15 is in the first position on the stop 22, wherein the armature 11 and the piston 15 are axially spaced from each other. As a result, when the field coil 10 is not energized, there is a flow connection from the pre-chamber 23 via the connection opening 25 and the pressure chamber inlet 28 of the piston 15 into the pressure chamber 14, which serves to fill the pressure chamber 14 and the fuel injection valve 1.
  • the armature 11 initially performs an axial stroke, for example in the direction of the fuel injection valve 1. After a first partial stroke of the armature 11, the armature 11 strikes with its closing section 24 against the valve seat 29 of the piston 15 and closes this way the pressure chamber inlet 28. After this first partial stroke of the armature 11, the armature 11 moves the piston 15, so that the armature 11 and the piston 15 during the subsequent partial stroke of the armature 11 to run a common hub.
  • the excitation coil 10 is de-energized, so that the piston 15 and the armature 11 by the Krafteinwirkuzng the second return spring 21.2 perform a common return stroke back toward the stopper 22.

Abstract

Conventional fuel injection devices comprise at least one fuel injection valve. This fuel injection valve is provided with an intensifier piston which intensifies the pressure of the liquid supplied to the fuel injection valve from a rail pressure to a higher pressure by hydraulic translation, the disadvantage of this method being that this kind of pressure intensification is complex and complicated. The aim of the invention is therefore to simplify pressure intensification and reduce its costs. For this purpose, the inventive device is provided with at least one electromagnetic pressure intensifier (5) on at least one fuel injection valve (1).

Description

Vorrichtung zum Einspritzen von KraftstoffDevice for injecting fuel
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zum Einspritzen von Kraftstoff nach derThe invention relates to a device for injecting fuel after the
Gattung des Hauptanspruchs.Genus of the main claim.
Es ist schon eine Vorrichtung zum Einspritzen von Kraftstoff aus der DE 100 50 599 Al bekannt mit wenigstens einem Brennstoffeinspritzventil. In diesem Brennstoffeinspritzventil ist ein Verstärkerkolben vorgesehen, der den Druck der demIt is already a device for injecting fuel from DE 100 50 599 Al known with at least one fuel injection valve. In this fuel injection valve, a booster piston is provided, the pressure of the
Brennstoffeinspritzventil zugeführten Flüssigkeit ausgehend von einem Raildruck durch hydraulische Übersetzung auf einen höheren Wert verstärkt. Nachteilig ist, dass diese Art der Druckverstärkung sehr aufwendig und kompliziert ist.Fuel injection valve fluid supplied increased from a rail pressure by hydraulic translation to a higher value. The disadvantage is that this type of pressure boosting is very complicated and complicated.
Außerdem bekannt ist, zwei Förderpumpen hintereinander in Reihe zu schalten, um einen vorbestimmten Druck in einer Kraftstoffleitung und in dem mit der Kraftstoffleitung strömungsverbundenen Brennstoffeinspritzventil zu erreichen. Da die von der zweiten Förderpumpe erzeugte Druckerhöhung nicht in jedem Betriebszustand benötigt wird, ist diese Lösung sehr teuer.It is also known to connect two feed pumps in series in series to achieve a predetermined pressure in a fuel line and in the fuel injector fluidly connected to the fuel line. Since the pressure increase generated by the second feed pump is not required in every operating state, this solution is very expensive.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Vorrichtung zum Einspritzen von Kraftstoff mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die Druckverstärkung im Brennstoffeinspritzventil vereinfacht und kostengünstiger gestaltet wird, indem an wenigstens einem Brennstoffeinspritzventil ein elektromagnetischer Druckverstärker angeordnet ist.The inventive device for injecting fuel with the characterizing features of the main claim has the advantage that the pressure gain in the fuel injector is simplified and made cheaper by at least one fuel injector, an electromagnetic pressure booster is arranged.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Vorrichtung zum Einspritzen von Kraftstoff möglich.The measures listed in the dependent claims advantageous refinements and improvements of the main claim device for injecting fuel are possible.
Besonders vorteilhaft ist, dass der elektromagnetische Druckverstärker dem wenigstens einen Brennstoffeinspritzventil unmittelbar vorgeschaltet ist. Auf diese Weise ist nur ein sehr kleines Volumen auf einen höheren Druck zu bringen, so dass der Energieaufwand für die Druckerhöhung gering ist und die Druckerhöhung in sehr kurzer Zeit erreichbar ist.It is particularly advantageous that the electromagnetic pressure booster is connected directly upstream of the at least one fuel injection valve. In this way, only a very small volume is put on a higher pressure, so the energy expenditure for the pressure increase is low and the pressure increase can be reached in a very short time.
Gemäss einem vorteilhaften Ausfuhrungsbeispiel ist der elektromagnetische Druckverstärker auf einen Eingangskanal des Brennstoffeinspritzventils gesteckt, geclipst, geschweisst oder gepresst. Diese Verbindungen sind besonders einfach und kostengünstig. Der elektromagnetische Druckverstärker ist mit einer Kraftstoffleitung strömungsverbunden.According to an advantageous exemplary embodiment, the electromagnetic pressure booster is plugged, clipped, welded or pressed onto an input channel of the fuel injection valve. These compounds are particularly simple and inexpensive. The electromagnetic pressure booster is fluidly connected to a fuel line.
Auch vorteilhaft ist, als Brennstoffeinspritzventil ein elektromagnetisches, piezoelektrisches oder magnetostriktives Brennstoffeinspritzventil zu verwenden.It is also advantageous to use an electromagnetic, piezoelectric or magnetostrictive fuel injection valve as the fuel injection valve.
Desweiteren vorteilhaft ist, wenn der elektromagnetische Druckverstärker einen Elektromagneten mit einer Erregerspule und einem Anker aufweist, wobei der Anker mit einem in einer Druckkammer des elektromagnetischen Druckverstärkers axial beweglich gelagerten Kolben wirkverbunden ist, da ein derartiger Druckverstärker besonders einfach aufgebaut ist und sehr günstig herstellbar ist.Furthermore, it is advantageous if the electromagnetic pressure booster has an electromagnet with an exciter coil and an armature, wherein the armature is operatively connected to a piston mounted axially movable in a pressure chamber of the electromagnetic pressure booster, since such a pressure booster is particularly simple and is very inexpensive to produce.
Darüber hinaus vorteilhaft ist, dass der elektromagnetische Druckverstärker einen Einlasskanal hat, der über eine Einlassöffnung in die Druckkammer mündet und dieIn addition, it is advantageous that the electromagnetic pressure booster has an inlet channel, which opens into the pressure chamber via an inlet opening and the
Druckkammer einen Auslass aufweist, der mit einem Eingangskanal des Brennstoffeinspritzventils strömungsverbunden ist.Pressure chamber having an outlet which is fluidly connected to an input channel of the fuel injection valve.
Außerdem vorteilhaft ist, wenn die Strömungsverbindung vom Einlasskanal in die Druckkammer verschliessbar ist und eine Druckerhöhung in der Druckkammer und stromab des Auslasses der Druckkammer mittels eines axialen Hubs des Kolbens erzielbar ist.It is also advantageous if the flow connection from the inlet channel into the pressure chamber can be closed and a pressure increase in the pressure chamber and downstream of the outlet of the pressure chamber by means of an axial stroke of the piston can be achieved.
Nach einer vorteilhaften Ausgestaltung ist vorgesehen, die Strömungsverbindung vom Einlasskanal in die Druckkammer mittels eines separaten Ventils in dem Einlasskanal, mittels des Kolbens oder durch ein Zusammenwirken des Kolbens mit dem Anker zu verschliessen und anschließend durch einen Hub des Kolbens eine kurzfristige Druckverstärkung zu erreichen.According to an advantageous embodiment, it is provided to close the flow connection from the inlet channel into the pressure chamber by means of a separate valve in the inlet channel, by means of the piston or by cooperation of the piston with the armature and then to achieve a short-term pressure boost by a stroke of the piston.
Zeichnung Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Fig.l eine Ansicht eines Brennstoffeinspritzventils mit einem elektromagnetischen Druckverstärker, Fig.2 ein erstes Ausführungsbeispiel und Fig. 3 ein zweites Ausführungsbeispiel des elektromagnetischen Druckverstärkers.drawing Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. 1 shows a view of a fuel injection valve with an electromagnetic pressure booster, FIG. 2 shows a first exemplary embodiment, and FIG. 3 shows a second exemplary embodiment of the electromagnetic pressure booster.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Fig.l zeigt ein Brennstoffeinspritzventil mit einem elektromagnetischen Druckverstärker.Fig.l shows a fuel injection valve with an electromagnetic pressure booster.
Die erfindungsgemäße Vorrichtung weist zumindest ein Brennstoffeinspritzventil 1 auf, das Kraftstoff beispielsweise bei einer Direkteinspritzung in einen Brennraum einer Brennkraftmaschine und bei einer Saugrohreinspritzung in ein sogenanntes Saugrohr einer Brennkraftmaschine einspritzt. Das zumindest eine Brennstoffeinspritzventil 1 ist mit einer Kraftstoffleitung 2, beispielsweise einem Kraftstoffverteiler, strömungsverbunden, über die das zumindest eine Brennstoffeinspritzventil 1 mit Kraftstoff versorgt wird. Das Brennstoffeinspritzventil 1 ist beispielsweise als ein elektromagnetisches, piezoelektrisches oder magnetstriktives Ventil ausgebildet, kann aber ausdrücklich beliebig ausgeführt sein.The device according to the invention has at least one fuel injection valve 1, which injects fuel, for example, in a direct injection into a combustion chamber of an internal combustion engine and in a suction tube injection into a so-called intake manifold of an internal combustion engine. The at least one fuel injection valve 1 is fluidly connected to a fuel line 2, for example a fuel distributor, via which the at least one fuel injection valve 1 is supplied with fuel. The fuel injection valve 1 is designed, for example, as an electromagnetic, piezoelectric or magnetstrictive valve, but can be designed explicitly as desired.
Es ist ein Förderaggregat 3 vorgesehen, das beispielsweise als Strömungspumpe ausgebildet ist und Kraftstoff aus einem Vorratsbehälter 4 druckerhöht in die Kraftstoffleitung 2 fördert.It is a delivery unit 3 is provided, which is designed for example as a flow pump and fuel from a reservoir 4 raises pressure in the fuel line 2 promotes.
Um die zunehmend strengeren Abgasnormen zu erfüllen, müssen die Emissionen einer Brennkraftmaschine bei einem sogenannten Kaltstart verringert werden. Dies wird beim Stand der Technik durch Erhöhung des Drucks in der Kraftstoffleitung 2 erreicht, so dass das durch das Brennstoffeinspritzventil 1 erzeugte Spray eine geringere mittlere Tröpfchengröße aufweist. Die erforderliche Druckerhöhung in der Kraftstoffleitung 2 ist jedoch derart hoch, dass diese nicht von dem vorgesehenen Förderaggregat 3 erreicht werden kann. Beim Stand der Technik ist dem Förderaggregat 3 daher ein weiteres zweites Förderaggregat nachgeschaltet, das beispielsweise als Strömungspumpe ausgebildet ist und den Druck in der Kraftstoffleitung bis auf den erforderlichen Wert erhöht, oder es wird ein leistungsfähigeres und damit teureres Förderaggregat eingesetzt. - A -In order to meet the increasingly stringent emission standards, the emissions of an internal combustion engine in a so-called cold start must be reduced. This is achieved in the prior art by increasing the pressure in the fuel line 2, so that the spray generated by the fuel injection valve 1 has a smaller average droplet size. However, the required pressure increase in the fuel line 2 is so high that it can not be achieved by the provided delivery unit 3. In the prior art, therefore, the delivery unit 3 is followed by another second delivery unit, which is designed for example as a flow pump and increases the pressure in the fuel line to the required value, or it is used a more powerful and therefore more expensive delivery unit. - A -
Um die Kosten für dieses zweite bzw. für das teurere Förderaggregat einzusparen, ist erfindungsgemäß vorgesehen, an dem wenigstens einen Brennstoffeinspritzventil 1 einen elektromagnetischen Druckverstärker 5 zur Druckerhöhung anzuordnen. Beispielsweise ist an jedem Brennstoffeinspritzventil 1 wenigstens ein Druckverstärker 5 vorgesehen.In order to save the cost of this second or for the more expensive delivery unit, the invention provides for the at least one fuel injector 1 to arrange an electromagnetic pressure booster 5 for increasing the pressure. For example, at least one pressure booster 5 is provided on each fuel injection valve 1.
Der wenigstens eine elektromagnetische Druckverstärker 5 ist dem wenigstens einen Brennstoffeinspritzventil 1 unmittelbar vorgeschaltet und beispielsweise auf einen Eingangskanal 8 des Brennstoffeinspritzventils 1 gesteckt, geclipst, geschweisst, gepresst oder ähnliches. Auf diese Weise ist der elektromagnetische Druckverstärker 5 fest mit dem Brennstoffeinspritzventil 1 verbunden und unmittelbar an diesem angeordnet.The at least one electromagnetic pressure booster 5 is connected directly upstream of the at least one fuel injection valve 1 and, for example, plugged, clipped, welded, pressed or the like onto an input channel 8 of the fuel injection valve 1. In this way, the electromagnetic pressure booster 5 is firmly connected to the fuel injection valve 1 and disposed directly on this.
Erfindungsgemäß wird der Druck des Kraftstoffs nicht schon in der Kraftstoffleitung 2, wie beim Stand der Technik, sondern mittels des elektromagnetischen Druckverstärkers 5 erst kurz vor und/oder in dem Brennstoffeinspritzventil 1 erhöht. Das Volumen innerhalb des Brennstoffeinspritzventils 1 ist sehr viel kleiner als das Volumen der Kraftstoffleitung 2 von dem Vorratsbehälter 2 bis zum Brennstoffeinspritzventil 1, so dass für die Druckerhöhung viel weniger Energie aufzuwenden ist. Außerdem wird die Druckerhöhung im Brennstoffeinspritzventil 1 mittels des elektromagnetischen Druckverstärkers 5 schneller erreicht als mittels eines in der Kraftstoffleitung 2 angeordneten, bezüglich der Strömungsverbindung weiter vom Brennstoffeinspritzventil 1 entfernten Förderaggregates 3.According to the invention, the pressure of the fuel is not already increased in the fuel line 2, as in the prior art, but by means of the electromagnetic pressure booster 5 just before and / or in the fuel injection valve 1. The volume within the fuel injection valve 1 is much smaller than the volume of the fuel line 2 from the reservoir 2 to the fuel injection valve 1, so much less energy is needed to increase the pressure. In addition, the pressure increase in the fuel injection valve 1 is achieved faster by means of the electromagnetic pressure booster 5 than by means disposed in the fuel line 2, with respect to the flow connection further away from the fuel injection valve 1 conveying unit. 3
Fig.2 zeigt ein erstes Ausführungsbeispiel des elektromagnetischen Druckverstärkers.2 shows a first embodiment of the electromagnetic pressure booster.
Bei dem elektromagnetischen Druckverstärker nach Fig.2 sind die gegenüber der Vorrichtung nach Fig.1 gleichbleibenden oder gleichwirkenden Teile durch die gleichen Bezugszeichen gekennzeichnet.In the electromagnetic pressure booster according to FIG. 2, the parts which remain the same or function with respect to the device according to FIG. 1 are identified by the same reference numerals.
Beispielsweise ist der elektromagnetische Druckverstärker 5 ein umkonstruiertes elektromagnetisches Einspritzventil, das beispielsweise wie nachfolgend beschrieben ausgeführt ist. Der elektromagnetische Druckverstärker 5 weist ein Gehäuse 9 auf, in dem ein Elektromagnet 7 mit einer Erregerspule 10 und einem axial beweglichen Anker 11 angeordnet ist. In dem Gehäuse 9 ist eine Druckkammer 14 vorgesehen, in der ein von dem Elektromagneten 7 betätigter Kolben 15 axial bezüglich einer Achse 12 beweglich angeordnet ist. Der Anker 11, der Kolben 15 und/oder die Erregerspule 10 sind beispielsweise zentrisch bezüglich der Achse 12 angeordnet. Der Anker 11 ist über einen Teil seiner axialen Länge ringförmig von der Erregerspule 10 umgeben, die in einem Magnettopf 13 angeordnet ist. Ein Einlasskanal 16 mündet über eine Einlassöfmung 17 in die Druckkammer 14 des Druckverstärkers 5, beispielsweise am Umfang derFor example, the electromagnetic pressure booster 5 is a redesigned electromagnetic injection valve, which is configured as described below, for example. The electromagnetic pressure booster 5 has a housing 9, in which an electromagnet 7 with an exciter coil 10 and an axially movable armature 11 is arranged. In the housing 9, a pressure chamber 14 is provided in which a piston 15 operated by the electromagnet 7 is movable axially with respect to an axis 12 is arranged. The armature 11, the piston 15 and / or the excitation coil 10 are, for example, arranged centrally with respect to the axis 12. The armature 11 is annular over a part of its axial length surrounded by the exciter coil 10, which is arranged in a magnet pot 13. An inlet channel 16 opens via an inlet opening 17 into the pressure chamber 14 of the pressure intensifier 5, for example at the circumference of the
Druckkammer 14. Der Einlasskanal 16 ist stromauf mit der Kraftstoffleitung 2 strömungsverbunden. Die Druckkammer 14 des elektromagnetischen Druckverstärkers 5 ist über einen Auslass 18 mit dem Brennstoffeinspritzventil 1 strömungsverbunden.Pressure chamber 14. The inlet channel 16 is fluidly connected to the upstream of the fuel line 2. The pressure chamber 14 of the electromagnetic pressure booster 5 is flow-connected to the fuel injection valve 1 via an outlet 18.
Der Kolben 15 des elektromagnetischen Druckverstärkers 5 ist mit dem Anker 11 mechanisch gekoppelt und mit diesem verbunden. Der Kolben 15 wird mittels einer Rückstellfeder 21 in eine erste Position bewegt, in der der Kolben 15 beispielsweise an einem Anschlag 22 anliegt und in der die Einlassöffnung 17 in die Druckkammer 14 geöffnet ist. Bei nicht bestromter Erregerspule 10 befindet sich der Kolben 15 in dieser ersten Position und ermöglicht so einen Notlauf.The piston 15 of the electromagnetic pressure booster 5 is mechanically coupled to the armature 11 and connected thereto. The piston 15 is moved by means of a return spring 21 into a first position, in which the piston 15 abuts, for example, against a stop 22 and in which the inlet opening 17 is opened into the pressure chamber 14. When the excitation coil 10 is not energized, the piston 15 is in this first position and thus enables emergency operation.
Wird die Erregerspule 10 bestromt, führt der Anker 11 mit dem Kolben 15 einen axialen Hub aus, beispielsweise in Richtung des Brennstoffeinspritzventils 1. Gemäss dem ersten Ausführungsbeispiel überdeckt der Kolben 15 nach einem ersten Teilhub die Einlassöffnung 17 und schliesst auf diese Weise die Strömungsverbindung zumIf the excitation coil 10 is energized, the armature 11 performs with the piston 15 from an axial stroke, for example in the direction of the fuel injection valve 1. According to the first embodiment, the piston 15 covers the inlet opening 17 after a first partial stroke and closes in this way the flow connection to
Einlasskanal 16. Die Einlassöffnung 17 kann aber auch auf beliebige andere Weise, beispielsweise durch ein separates Ventil in dem Einlasskanal 16, verschlossen werden. Nach dem Schliessen der Einlassöffnung 17 erzeugt der weitere Teilhub des Kolbens 15 eine Druckerhöhung in der Druckkammer 14 und in dem mit dem Auslass 18 des elektromagnetischen Druckverstärkers 5 strömungsverbundenen Teil desInlet port 16. The inlet port 17 may also be closed in any other way, for example by a separate valve in the inlet channel 16. After closing the inlet opening 17, the further partial stroke of the piston 15 generates an increase in pressure in the pressure chamber 14 and in the part of the flow-connected to the outlet 18 of the electromagnetic pressure booster 5
Brennstoffeinspritzventils 1, da das Brennstoffeinspritzventil 1 zu diesem Zeitpunkt geschlossen ist und der Kolben 15 daher auf ein abgeschlossenes Flüssigkeitsvolumen wirkt. Der Druckverstärker 5 bewirkt auf diese Weise kurz vor dem Öffnen des Brennstoffeinspritzventils 1 eine Druckerhöhung des Kraftstoffs. Wenn das Brennstoffeinspritzventil 1 nach Erreichen einer vorbestimmten Druckerhöhung öffnet, wird zumindest ein Teil des durch den elektromagnetischen Druckverstärker 5 druckerhöhten Kraftstoffs in den Brennraum bzw. in das Saugrohr der Brennkraftmaschine eingespritzt. Die vorbestimmte Druckerhöhung ist abhängig von dem jeweiligen Betriebszustand der Brennkraftmaschine und wird jeweils aus Parametern der Motorsteuerung berechnet, um das Brennstoffeinspritzventil zu einem optimalen Zeitpunkt zu öffnen.Fuel injection valve 1, since the fuel injection valve 1 is closed at this time and the piston 15 therefore acts on a closed fluid volume. The pressure booster 5 causes in this way shortly before the opening of the fuel injection valve 1, a pressure increase of the fuel. When the fuel injection valve 1 opens after reaching a predetermined pressure increase, at least part of the fuel pressure-increased by the electromagnetic pressure booster 5 is injected into the combustion chamber or into the intake manifold of the internal combustion engine. The predetermined pressure increase is dependent on the respective operating state of the internal combustion engine and is in each case from parameters the engine controller calculates to open the fuel injector at an optimal time.
Beispielsweise weist das Gehäuse 9 im Bereich der Spule 10 eine Belüftungsbohrung 30 auf, um einen Druckausgleich zu gewährleisten.For example, the housing 9 in the region of the coil 10 on a vent hole 30 to ensure pressure equalization.
Nach dem oder kurz vor oder gleichzeitig mit dem Schließen des Brennstoffeinspritzventils 1 wird die Erregerspule 10 stromlos geschaltet, so dass der Kolben 15 des elektromagnetischen Druckverstärkers 5 durch die Krafteinwirkung der Rückstellfeder 21 auf den Kolben 15 ausgehend von einer zweiten Position zurück in die erste Position bewegt.wird. Da in der ersten Position die Einlassöffnung 17 wieder geöffnet ist, strömt Flüssigkeit aus dem Einlasskanal 16 in die Druckkammer 14 und in das Brennstoffeinspritzventil 1 stromab des Auslasses 18 des elektromagnetischen Druckverstärkers 5 nach und ersetzt dabei die bei der letzten Einspritzung eingespritzte Kraftstoffmenge.After or shortly before or simultaneously with the closing of the fuel injection valve 1, the excitation coil 10 is de-energized, so that the piston 15 of the electromagnetic pressure booster 5 is moved by the force of the return spring 21 on the piston 15, starting from a second position back to the first position .becomes. In the first position, since the inlet port 17 is opened again, liquid flows from the inlet port 16 into the pressure chamber 14 and into the fuel injector 1 downstream of the outlet 18 of the electromagnetic pressure intensifier 5, replacing the amount of fuel injected at the last injection.
Fig.3 zeigt ein zweites Ausführungsbeispiel des elektromagnetischen Druckverstärkers.3 shows a second embodiment of the electromagnetic pressure booster.
Bei dem elektromagnetischen Druckverstärker nach Fig.3 sind die gegenüber der Vorrichtung nach Fig.1 und gegenüber dem elektromagnetischen Druckverstärker nachIn the electromagnetic pressure booster according to Figure 3 are compared to the device according to Figure 1 and with respect to the electromagnetic pressure booster after
Fig.2 gleichbleibenden oder gleichwirkenden Teile durch die gleichen Bezugszeichen gekennzeichnet.Fig.2 consistent or equivalent parts characterized by the same reference numerals.
Das zweite Ausführungsbeispiel des elektromagnetischen Druckverstärkers unterscheidet sich von dem ersten Ausführungsbeispiel darin, dass der Einlasskanal 16 nicht durch denThe second embodiment of the electromagnetic pressure booster differs from the first embodiment in that the intake passage 16 is not affected by the
Kolben 15, sondern durch ein Zusammenwirken von dem Anker 11 mit dem Kolben 15 verschlossen wird und dass in axialer Richtung gesehen zwischen der Spule 10 und der Druckkammer 14 eine Vorkammer 23 vorgesehen ist. Der Einlasskanal 16 mündet nicht wie beim ersten Ausführungsbeispiel in die Druckkammer 14, sondern in die Vorkammer 23. Der Anker 11 und der Kolben 15 sind bei dem zweiten Ausführungsbeispiel nicht einteilig miteinander verbunden, sondern als separate Teile ausgeführt, die in axialer Richtung zumindest abschnittsweise relativ zueinander beweglich angeordnet sind.Piston 15, but is closed by an interaction of the armature 11 with the piston 15 and that seen in the axial direction between the coil 10 and the pressure chamber 14, an antechamber 23 is provided. The inlet channel 16 does not open as in the first embodiment in the pressure chamber 14, but in the prechamber 23. The armature 11 and the piston 15 are not integrally connected to each other in the second embodiment, but designed as separate parts, in the axial direction at least partially relative are arranged to move each other.
In der Vorkammer 23 ist eine erste Rückstellfeder 21.1 vorgesehen, die sich mit ihrem einen Ende am Kolben 15 abstützt und mit ihrem anderen Ende rückstellend auf den Anker 11 wirkt. In der Druckkammer 14 ist eine zweite Rückstellfeder 21.2 angeordnet, die sich mit ihrem einen Ende am Gehäuse 9 abstützt und mit ihrem anderen Ende rückstellend auf den Kolben 15 wirkt. Die erste Rückstellfeder 21.1 ist weicher ausgeführt als die zweite Rückstellfeder 21.2.In the antechamber 23, a first return spring 21.1 is provided, which is supported with its one end on the piston 15 and with its other end restoring to the Anchor 11 acts. In the pressure chamber 14, a second return spring 21.2 is arranged, which is supported with its one end on the housing 9 and with its other end resetting acts on the piston 15. The first return spring 21.1 is made softer than the second return spring 21.2.
Beispielsweise ist der Einlasskanal 16 teilweise in dem Anker 11 ausgebildet und führt über zumindest eine am Anker 11 vorgesehene Einlassöffnung 17 zentral bezüglich der Achse 12 in die Vorkammer 23. Die Einlassöffnung 17 kann aber auch am Umfang der Vorkammer 23 und der Einlasskanal 16 nicht im Anker 11, sondern separat oder am Gehäuse 9 vorgesehen sein.For example, the inlet channel 16 is partially formed in the armature 11 and via at least one provided at anchor 11 inlet opening 17 centrally with respect to the axis 12 in the antechamber 23. The inlet opening 17 but also at the periphery of the pre-chamber 23 and the inlet channel 16 is not in the anchor 11, but be provided separately or on the housing 9.
Der Anker 11, der Kolben 15 und/oder die Spule 10 sind beispielsweise zentrisch bezüglich der Achse 12 angeordnet. Der Anker 11 weist an seinem dem Kolben 15 zugewandten Ende einen Schliessabschnitt 24 auf, der beispielsweise kugelförmig ausgebildet ist. Die Vorkammer 23 ist über eine Verbindungsöffnung 25 mit derThe armature 11, the piston 15 and / or the coil 10 are, for example, arranged centrally with respect to the axis 12. The armature 11 has at its end facing the piston 15 a closing section 24, which is formed, for example, spherically. The pre-chamber 23 is connected via a connection opening 25 with the
Druckkammer 14 verbunden. Der Kolben 15 hat einen zentrisch bezüglich der Achse 12 angeordneten Druckkammereinlass 28, der an dem der Vorkammer 23 zugewandten Ende einen beispeilsweise kegelförmigen Ventilsitz 29 aufweist. Der Ventilsitz 29 des Kolbens 15 wirkt nach einem vorbestimmten axialen Hub des Ankers 11 mit dem Schliessabschnitt 24 des Ankers 11 zusammen und öffnet bzw. schliesst diePressure chamber 14 connected. The piston 15 has a centrally arranged with respect to the axis 12 of the pressure chamber inlet 28, which has a beispeilweise conical valve seat 29 at the end facing the pre-chamber 23. The valve seat 29 of the piston 15 acts after a predetermined axial stroke of the armature 11 with the closing portion 24 of the armature 11 together and opens or closes the
Strömungsverbindung zwischen der Vorkammer 23 und der Druckkammer 14.Flow connection between the pre-chamber 23 and the pressure chamber 14th
Bei nicht bestromter Erregerspule 10 befindet sich der Kolben 15 in der ersten Position am Anschlag 22, wobei der Anker 11 und der Kolben 15 axial zueinander beabstandet sind. Dadurch besteht bei nicht bestromter Erregerspule 10 eine Strömungsverbindung von der Vorkammer 23 über die Verbindungsöffnung 25 und den Druckkammereinlass 28 des Kolbens 15 in die Druckkammer 14, die der Befüllung der Druckkammer 14 und des Brennstoffeinspritzventils 1 dient.When energized exciter coil 10, the piston 15 is in the first position on the stop 22, wherein the armature 11 and the piston 15 are axially spaced from each other. As a result, when the field coil 10 is not energized, there is a flow connection from the pre-chamber 23 via the connection opening 25 and the pressure chamber inlet 28 of the piston 15 into the pressure chamber 14, which serves to fill the pressure chamber 14 and the fuel injection valve 1.
Wird die Erregerspule 10 bestromt, führt zunächst nur der Anker 11 einen axialen Hub aus, beispielsweise in Richtung des Brennstoffeinspritzventils 1. Nach einem ersten Teilhub des Ankers 11 schlägt der Anker 11 mit seinem Schliessabschnitt 24 an den Ventilsitz 29 des Kolbens 15 an und schliesst auf diese Weise den Druckkammereinlass 28. Nach diesem ersten Teilhub des Ankers 11 bewegt der Anker 11 den Kolben 15 mit, so dass der Anker 11 und der Kolben 15 beim nachfolgenden Teilhub des Ankers 11 einen gemeinsamen Hub ausfuhren. Nach dem Schliessen des Druckkammereinlasses 28 bewirkt der gemeinsame Hub von dem Anker 11 und dem Kolben 15 eine Druckerhöhung in der Druckkammer 14 und in dem mit dem Auslass 18 des elektromagnetischen Druckverstärkers 5 strömungsverbundenen Teil des Brennstoffeinspritzventils 1, da das Brennstoffeinspritzventil 1 zu diesem Zeitpunkt geschlossen ist und der Kolben 15 daher auf ein abgeschlossenes Flüssigkeitsvolumen wirkt. Wenn das Brennstoffeinspritzventil 1 nach Erreichen einer vorbestimmten Druckerhöhung öffnet, wird zumindest ein Teil des durch den elektromagnetischen Druckverstärker 5 druckerhöhten Kraftstoffs in den Brennraum bzw. in das Saugrohr der Brennkraftmaschine eingespritzt.If the excitation coil 10 is energized, only the armature 11 initially performs an axial stroke, for example in the direction of the fuel injection valve 1. After a first partial stroke of the armature 11, the armature 11 strikes with its closing section 24 against the valve seat 29 of the piston 15 and closes this way the pressure chamber inlet 28. After this first partial stroke of the armature 11, the armature 11 moves the piston 15, so that the armature 11 and the piston 15 during the subsequent partial stroke of the armature 11 to run a common hub. After closing the pressure chamber inlet 28 causes the common stroke of the armature 11 and the piston 15, a pressure increase in the pressure chamber 14 and in the outlet 18 of the electromagnetic pressure booster 5 fluidly connected part of the fuel injection valve 1, since the fuel injection valve 1 is closed at this time and the piston 15 therefore acts on a closed volume of liquid. When the fuel injection valve 1 opens after reaching a predetermined pressure increase, at least part of the fuel pressure-increased by the electromagnetic pressure booster 5 is injected into the combustion chamber or into the intake manifold of the internal combustion engine.
Nach dem oder kurz vor oder gleichzeitig mit dem Schließen des Brennstoffeinspritzventils 1 wird die Erregerspule 10 stromlos geschaltet, so dass der Kolben 15 und der Anker 11 durch die Krafteinwirkuzng der zweiten Rückstellfeder 21.2 einen gemeinsamen Rückstellhub zurück in Richtung des Anschlags 22 ausführen.After or shortly before or simultaneously with the closing of the fuel injection valve 1, the excitation coil 10 is de-energized, so that the piston 15 and the armature 11 by the Krafteinwirkuzng the second return spring 21.2 perform a common return stroke back toward the stopper 22.
Nachdem der Kolben 15 den Anschlag 22 erreicht hat, führt der Anker 11 durch die Krafteinwirkung der ersten Rückstellfeder 21.1 allein einen weiteren Rückstellhub aus. Durch diese Relativbewegung des Ankers 11 zum Kolben 15 wird der Druckkammereinlass 28 wieder geöffnet, so dass Flüssigkeit aus dem Einlasskanal 16 und/oder der Vorkammer 23 in die Druckkammer 14 und in das BrennstoffeinspritzventilAfter the piston 15 has reached the stop 22, the armature 11 carries out by the force of the first return spring 21.1 alone a further return stroke. By this relative movement of the armature 11 to the piston 15 of the pressure chamber inlet 28 is opened again, so that liquid from the inlet channel 16 and / or the prechamber 23 in the pressure chamber 14 and in the fuel injection valve
1 stromab des Auslasses 18 des elektromagnetischen Druckverstärkers 5 nachströmt und dabei die bei der letzten Einspritzung eingespritzte Kraftstoffmenge ersetzt. 1 flows downstream of the outlet 18 of the electromagnetic pressure booster 5 and thereby replaces the fuel injected at the last injection amount of fuel.

Claims

Ansprüche claims
1. Vorrichtung zum Einspritzen von Kraftstoff mit wenigstens einem Brennstoffeinspritzventil (1), dadurch gekennzeichnet, dass an wenigstens einem Brennstoffeinspritzventil (1) wenigstens ein elektromagnetischer Druckverstärker (5) angeordnet ist.1. An apparatus for injecting fuel with at least one fuel injection valve (1), characterized in that at least one fuel injection valve (1) at least one electromagnetic pressure booster (5) is arranged.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der wenigstens eine elektromagnetische Druckverstärker (5) dem wenigstens einen Brennstoffeinspritzventil (1) unmittelbar vorgeschaltet ist.2. Apparatus according to claim 1, characterized in that the at least one electromagnetic pressure booster (5) the at least one fuel injection valve (1) is connected immediately upstream.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der elektromagnetische Druckverstärker (5) auf einen Eingangskanal (8) des Brennstoffeinspritzventils (1) gesteckt, geclipst, geschweisst oder gepresst ist.3. Apparatus according to claim 1, characterized in that the electromagnetic pressure booster (5) on an input channel (8) of the fuel injection valve (1) inserted, clipped, welded or pressed.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der elektromagnetische Druckverstärker (5) mit einer Kraftstoffleitung (2) strömungsverbunden ist.4. Apparatus according to claim 1, characterized in that the electromagnetic pressure booster (5) with a fuel line (2) is fluidly connected.
5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Brennstoffeinspritzventil (1) ein elektromagnetisches, piezoelektrisches oder magnetostriktives Brennstoffeinspritzventil ist.5. The device according to claim 1, characterized in that the fuel injection valve (1) is an electromagnetic, piezoelectric or magnetostrictive fuel injection valve.
6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der elektromagnetische Druckverstärker (5) einen Elektromagneten (7) mit einer Erregerspule (10) und einem Anker (11) aufweist, wobei der Anker (11) mit einem in einer Druckkammer6. The device according to claim 1, characterized in that the electromagnetic pressure booster (5) comprises an electromagnet (7) with an exciter coil (10) and an armature (11), wherein the armature (11) with a in a pressure chamber
(14) des elektromagnetischen Druckverstärkers (5) axial beweglich gelagerten Kolben (15) wirkverbunden ist.(14) of the electromagnetic pressure booster (5) axially movably mounted piston (15) is operatively connected.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der elektromagnetische Druckverstärker (5) einen Einlasskanal (16) aufweist, der über eine Einlassöffnung7. The device according to claim 6, characterized in that the electromagnetic pressure booster (5) has an inlet channel (16), which via an inlet opening
(17) in die Druckkammer (14) mündet.(17) opens into the pressure chamber (14).
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Druckkammer (14) einen Auslass (18) aufweist, der mit einem Eingangskanal (8) des Brennstoffeinspritzventils (1) strömungsverbunden ist. 8. The device according to claim 7, characterized in that the pressure chamber (14) has an outlet (18) which is fluidly connected to an input channel (8) of the fuel injection valve (1).
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Strömungsverbindung vom Einlasskanal (16) in die Druckkammer (14) verschliessbar ist und eine Druckerhöhung in der Druckkammer (14) und stromab des Auslasses (18) der Druckkammer (14) mittels eines axialen Hubs des Kolbens9. Apparatus according to claim 8, characterized in that the flow connection from the inlet channel (16) into the pressure chamber (14) is closable and an increase in pressure in the pressure chamber (14) and downstream of the outlet (18) of the pressure chamber (14) by means of an axial Hubs of the piston
(15) erzielbar ist.(15) is achievable.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die Strömungsverbindung vom Einlasskanal (16) in die Druckkammer (14) mittels eines separaten Ventils in dem Einlasskanal (16), mittels des Kolbens (15) oder durch ein10. The device according to claim 9, characterized in that the flow connection from the inlet channel (16) into the pressure chamber (14) by means of a separate valve in the inlet channel (16), by means of the piston (15) or by a
Zusammenwirken des Kolbens (15) mit dem Anker (11) verschliessbar ist. Cooperation of the piston (15) with the armature (11) can be closed.
EP06708414A 2005-03-16 2006-02-21 Fuel injection device Expired - Fee Related EP1861617B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005012068 2005-03-16
DE102006003484A DE102006003484A1 (en) 2005-03-16 2006-01-25 Device for injecting fuel
PCT/EP2006/060134 WO2006097398A1 (en) 2005-03-16 2006-02-21 Fuel injection device

Publications (2)

Publication Number Publication Date
EP1861617A1 true EP1861617A1 (en) 2007-12-05
EP1861617B1 EP1861617B1 (en) 2009-07-15

Family

ID=36216921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708414A Expired - Fee Related EP1861617B1 (en) 2005-03-16 2006-02-21 Fuel injection device

Country Status (5)

Country Link
US (1) US20090020101A1 (en)
EP (1) EP1861617B1 (en)
JP (1) JP4728389B2 (en)
DE (2) DE102006003484A1 (en)
WO (1) WO2006097398A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7721716B1 (en) 2008-07-16 2010-05-25 Harwood Michael R High pressure piezoelectric fuel injector
JP2010174865A (en) * 2009-02-02 2010-08-12 Denso Corp Method for controlling liquid injecting/feeding device
JP5104772B2 (en) * 2009-02-02 2012-12-19 株式会社デンソー Liquid jet supply device
US9284930B2 (en) 2011-06-03 2016-03-15 Michael R. Harwood High pressure piezoelectric fuel injector
DE102011078068A1 (en) * 2011-06-24 2012-12-27 Robert Bosch Gmbh Device for injecting fluid
US11958706B2 (en) 2014-12-15 2024-04-16 The Procter & Gamble Company Non-uniform tail sealing and methods thereof

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PH25880A (en) * 1983-08-05 1991-12-02 Orbital Eng Pty Fuel injection method and apparatus
GB8705783D0 (en) * 1987-03-11 1987-04-15 Lucas Ind Plc Fuel pumping apparatus
JPH01166266A (en) * 1987-12-23 1989-06-30 Toshiba Corp Positioning device for electronic parts by pattern recognition
US5035221A (en) * 1989-01-11 1991-07-30 Martin Tiby M High pressure electronic common-rail fuel injection system for diesel engines
JPH03107568A (en) * 1989-09-22 1991-05-07 Aisin Seiki Co Ltd Fuel injection device
DE4106015A1 (en) * 1991-02-26 1992-08-27 Ficht Gmbh PUSHBULE FUEL INJECTION FOR COMBUSTION ENGINES
CA2127799C (en) * 1992-03-04 1999-06-29 Wolfgang Heimberg Fuel injection device according to the solid-state energy storage principle for internal combustion engines
US6161770A (en) * 1994-06-06 2000-12-19 Sturman; Oded E. Hydraulically driven springless fuel injector
US6257499B1 (en) * 1994-06-06 2001-07-10 Oded E. Sturman High speed fuel injector
JPH08200180A (en) * 1995-01-27 1996-08-06 Nissan Motor Co Ltd Fuel injection device
DE19515782A1 (en) * 1995-04-28 1996-10-31 Ficht Gmbh Fuel injection device for internal combustion engines
JPH10213041A (en) * 1997-01-31 1998-08-11 Yamaha Motor Co Ltd Liquid injector for internal combustion engine
US5890662A (en) * 1997-11-10 1999-04-06 Outboard Marine Corporation Solenoid with variable magnetic path
US6119960A (en) * 1998-05-07 2000-09-19 Caterpillar Inc. Solenoid actuated valve and fuel injector using same
DE19835494C2 (en) * 1998-08-06 2000-06-21 Bosch Gmbh Robert Pump-nozzle unit
DE19910970A1 (en) * 1999-03-12 2000-09-28 Bosch Gmbh Robert Fuel injector
US6253736B1 (en) * 1999-08-10 2001-07-03 Cummins Engine Company, Inc. Fuel injector nozzle assembly with feedback control
JP3911930B2 (en) * 1999-10-28 2007-05-09 株式会社デンソー Glow plug with combustion pressure sensor
JP2001132579A (en) * 1999-11-02 2001-05-15 Nissan Motor Co Ltd Unit injector and fuel injection control device for internal combustion engine
GB0005744D0 (en) * 2000-03-10 2000-05-03 Federal Mogul Ignition Uk Ltd Fuel injector
DE10014451A1 (en) * 2000-03-23 2001-09-27 Bosch Gmbh Robert Method for forming injection pressure curve at injection systems e.g. of motor vehicles and injection system with pump and injection nozzles, has control valves mounted in pump which communicate with each other across HP line
US6295972B1 (en) * 2000-03-30 2001-10-02 Bombardier Motor Corporation Of America Fuel delivery using multiple fluid delivery assemblies per combustion chamber
DE60123628T2 (en) * 2000-08-02 2007-08-23 Mikuni Corp. Electronically controlled injector
JP4431268B2 (en) * 2000-11-17 2010-03-10 株式会社ミクニ Electronically controlled fuel injection device
CN1133810C (en) * 2001-02-16 2004-01-07 郗大光 Electronic fuel oil jetter
DE10117401C2 (en) * 2001-04-06 2003-02-27 Mtu Friedrichshafen Gmbh Fuel injection system for an internal combustion engine
US6854703B2 (en) * 2001-09-06 2005-02-15 Honeywell International Inc. Pressure regulating valve with adjustment features
DE10145622B4 (en) * 2001-09-15 2009-09-10 Robert Bosch Gmbh Valve for controlling fluids
US6792921B2 (en) * 2001-12-17 2004-09-21 Caterpillar Inc Electronically-controlled fuel injector
US6910644B2 (en) * 2001-12-26 2005-06-28 Toyota Jidosha Kabushiki Kaisha Solenoid-operated fuel injection valve
US7032574B2 (en) * 2003-03-24 2006-04-25 Sturman Industries, Inc. Multi-stage intensifiers adapted for pressurized fluid injectors
US20050034707A1 (en) * 2003-08-12 2005-02-17 Ulrich Augustin Control valve for fuel injector and method of use
US7240856B2 (en) * 2003-10-24 2007-07-10 Keihin Corporation Fuel injection control device
JP3997983B2 (en) * 2003-11-10 2007-10-24 株式会社デンソー Piezoelectric element driven three-way switching valve and fuel injection valve using the three-way switching valve
US6978770B2 (en) * 2004-05-12 2005-12-27 Cummins Inc. Piezoelectric fuel injection system with rate shape control and method of controlling same
EP1612398B1 (en) * 2004-06-30 2006-10-04 C.R.F. Società Consortile per Azioni Fuel injector comprising a force-balanced control valve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006097398A1 *

Also Published As

Publication number Publication date
JP4728389B2 (en) 2011-07-20
EP1861617B1 (en) 2009-07-15
DE102006003484A1 (en) 2006-09-21
JP2008533376A (en) 2008-08-21
US20090020101A1 (en) 2009-01-22
DE502006004232D1 (en) 2009-08-27
WO2006097398A1 (en) 2006-09-21

Similar Documents

Publication Publication Date Title
EP1861617B1 (en) Fuel injection device
DE69923108T2 (en) Fuel system and pump for use in such a system
WO2016015912A1 (en) High-pressure pump
EP1203151B1 (en) Two-stage electromagnetic valve for an injector of internal combustion engines
WO2009092658A1 (en) Compact injection device with simple construction
DE112009001971T5 (en) Check valve with separate spherical spring guide
DE102016220326A1 (en) Valve for metering a gaseous or liquid fuel
DE112016004671T5 (en) Control method for high pressure fuel supply pump and high pressure fuel supply pump, which uses it
EP1321663A2 (en) Fuel injection device for an internal combustion engine
DE19837332A1 (en) Control unit for controlling the build up of pressure in a pump unit such as an internal combustion engine fuel pump
DE102008001907A1 (en) Fuel injector
WO2017108298A1 (en) Fuel injector
EP1144842A1 (en) Injector for a fuel injection system for internal combustion engines comprising an injector needle that projects into the valve control space
DE3008070C2 (en)
EP3387247B1 (en) Electromagnetically actuatable inlet valve and high-pressure pump having an inlet valve
WO2010012315A1 (en) Compact injection device
DE102016202949A1 (en) Electromagnetically controllable suction valve, high pressure pump with such a suction valve and method for controlling the suction valve
DE102020214880A1 (en) Pump, in particular high-pressure fuel pump, and method for operating a pump
DE2203508A1 (en) ELECTROMAGNETICALLY CONTROLLED FUEL INJECTION DEVICE FOR COMBUSTION MACHINERY
DE102021203917A1 (en) Electromagnetic actuator device for a fuel pump valve
DE102004057151B4 (en) Injection valve with a pressure-holding valve for fluid pressure of a spring chamber
DE102020209574A1 (en) Electromagnetically actuated inlet valve and high-pressure pump with inlet valve
DE102008004634A1 (en) Fuel injection device for use in internal combustion engine i.e. single cylinder engine, of vehicle, has injector with nozzle area connected by connecting lines with pumping area of fuel pump, and pressure area arranged at pumping area
DE102021209819A1 (en) Method for operating a fuel injection device of an internal combustion engine
DE10201470A1 (en) Double-switching valve for fuel injection systems

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20071016

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20080519

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 502006004232

Country of ref document: DE

Date of ref document: 20090827

Kind code of ref document: P

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091115

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091026

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091015

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091115

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

26N No opposition filed

Effective date: 20100416

BERE Be: lapsed

Owner name: ROBERT BOSCH G.M.B.H.

Effective date: 20100228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100228

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20091016

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100228

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100901

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100221

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: PK

Free format text: DIE BENENNUNG CH/LI WURDE ZURUECKGENOMMEN

RBV Designated contracting states (corrected)

Designated state(s): DE FR IT

REG Reference to a national code

Ref country code: NL

Ref legal event code: XEP

Effective date: 20110811

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20120228

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120223

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090715

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100116

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100221

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 436645

Country of ref document: AT

Kind code of ref document: T

Effective date: 20110221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110221

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20131031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130228