EP3055550B1 - Injection valve and method for operating an injection valve - Google Patents

Injection valve and method for operating an injection valve Download PDF

Info

Publication number
EP3055550B1
EP3055550B1 EP14795965.4A EP14795965A EP3055550B1 EP 3055550 B1 EP3055550 B1 EP 3055550B1 EP 14795965 A EP14795965 A EP 14795965A EP 3055550 B1 EP3055550 B1 EP 3055550B1
Authority
EP
European Patent Office
Prior art keywords
needle body
piezoelectric actuator
injection valve
valve
injection
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
Application number
EP14795965.4A
Other languages
German (de)
French (fr)
Other versions
EP3055550A1 (en
Inventor
Hui Li
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3055550A1 publication Critical patent/EP3055550A1/en
Application granted granted Critical
Publication of EP3055550B1 publication Critical patent/EP3055550B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
    • 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
    • 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
    • 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
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
    • 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
    • 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
    • F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical
    • 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 an injection valve and a method for operating the Einspitzventils.
  • An injection valve is eg in US Pat. No. 5,860,597 disclosed. Due to increasingly stringent statutory regulations regarding permissible pollutant emissions from internal combustion engines, injection accuracy of injection valves of the internal combustion engine is of central importance.
  • the object on which the invention is based is to provide an injection valve and a method for operating the injection valve, which contribute to achieving a high injection accuracy of the injection valve.
  • the invention is characterized by an injection valve.
  • the injection valve has an injector body with a recess with a fluid inlet and a fluid outlet.
  • the injection valve has a needle body which is arranged to be axially movable in the recess of the injector body and which in a closed position of the needle body prevents fluid flow through an injection opening of the injector body and otherwise releases it.
  • the injection valve has a control chamber, which is arranged in the recess and which is arranged hydraulically between the fluid inlet and the fluid outlet.
  • the injection valve has a control valve with a valve body, which is arranged in the control chamber and which is designed to prevent a fluid flow between the control chamber and the fluid outlet in a closed position of the valve body and otherwise release.
  • the injection valve has a piezoelectric actuator, which is mechanically coupled to the control valve via a first transformer for opening the control valve by the electrical discharge of the piezoelectric actuator, wherein the piezoelectric actuator is additionally mechanically coupled to the needle body for closing the injection valve.
  • the piezoelectric actuator is mechanically coupled to the needle body via a second transformer, which is connected to the needle body.
  • the piezoelectric actuator is mechanically coupled to the needle body after overcoming a predetermined idle stroke between the second transformer and the piezoelectric actuator.
  • the piezoelectric actuator is mechanically coupled to the needle body upon reaching the closed position of the needle body and upon reaching a predetermined opening position of the needle body.
  • the invention is characterized by a method for operating the injection valve or an advantageous embodiment of the injection valve.
  • the piezoactuator is electrically discharged to open the control valve by means of the first transformer and thereby to open the injection valve.
  • a time of a first mechanical bounce is detected, which is transmitted to the piezoactuator by the mechanical coupling of the piezoactuator with the needle body when a predetermined opening position of the needle body is reached.
  • the piezoactuator is electrically charged to close the injector by mechanically coupling the piezoactuator to the needle body, for example, in a follower cycle of the injector or in the same duty cycle of the injector in which the first mechanical bounce was detected.
  • a point in time of a further mechanical bounce is detected by means of the piezoactuator, which is achieved by the mechanical coupling of the piezoactuator with the needle body when reaching the Closed position of the needle body is transmitted to the piezoelectric actuator.
  • the time of the first mechanical bounce and / or the time of the further mechanical bounce can be detected. These two times or one of the two times can be used for the control of the injection valve in order to achieve a high injection accuracy.
  • FIGS. 1 to 6 show an injection valve 1 at different operating times.
  • the injection valve 1 is based on the FIG. 2 explained in more detail.
  • the injection valve 1 has an injector body 2.
  • the injector body 2 has a recess 3, as well as a fluid inlet 7 and a fluid outlet 9.
  • the fluid inlet 7 is hydraulically coupled, for example, to a high-pressure fuel accumulator, such as a so-called common rail, and is thus supplied, for example, with a fuel at a pressure of, for example, up to 2500 bar.
  • a high-pressure fuel accumulator such as a so-called common rail
  • the fluid drain 9 is hydraulically coupled to a low pressure region, such as a fuel tank.
  • the injection valve 1 has a needle body 10, which is arranged axially movable in the recess 3 of the injector body 2.
  • the needle body 10 In an open position of the needle body 10, the needle body 10 is predetermined axially spaced from the associated valve seat and thereby releases a fluid flow through the injection port 12. The injection valve 1 is thus opened.
  • the injection valve 1 has a control chamber 15, which is arranged in the recess 3 and which is arranged hydraulically between the fluid inlet 7 and the fluid outlet 9.
  • the recess in particular comprises the space around the needle body 10, a hydraulic connecting line to the control chamber 15 and the control chamber 15 itself.
  • the injection valve 1 has a control valve 16 with a valve body 17.
  • the control valve 16 is arranged in the control chamber 15.
  • valve body 17 In a closed position of the valve body 17, the valve body 17 rests on an associated valve seat of the injector body 2, whereby a fluid flow between the control chamber 15 and the fluid outlet 9 is prevented.
  • valve body 17 In an opening position of the valve body 17, the valve body 17 is predetermined axially spaced from the associated valve seat and thus releases the fluid flow between the control chamber 15 and the fluid outlet 9.
  • the injection valve 1 has a piezoactuator 20, which is coupled to the control valve 16 via a first transmitter 23 for opening the control valve 16.
  • the piezoactuator 20 is additionally mechanically mechanically coupled to the needle body 10, for example, after overcoming a predetermined idle stroke L, for example via a second transformer 24, which is connected to the needle body 10.
  • the injection valve 1 can be operated in different operating modes.
  • FIG. 7 shows three operating modes.
  • a first mode of operation is a so-called full stroke injection FSI.
  • the injection valve 1 is opened for a predetermined time and then closed again.
  • Another operating mode is a so-called part stroke injection PSI.
  • the injection valve 1 is opened only briefly and immediately closed again.
  • Another mode of operation is a so-called boost injection BI.
  • the injection valve 1 is first opened a bit, after a predetermined period of time even further opened and closed again after a further predetermined period of time.
  • the operation modes are represented by four timings: a timing OPP1 in which the opening operation of the injector 1 starts; One or more times OPP2 in which the needle body 10 reaches the predetermined opening position; A time OPP3 in which the closing operation of the injector 1 starts; A time OPP4 in which the needle body 10 reaches the closing position.
  • FIG. 8 shows a flowchart of a program for operating the injection valve 1.
  • the program can be processed, for example, by a control device SV.
  • step S1 the piezoactuator 20 is in a charged state (see FIG FIG. 1 ).
  • step S2 the piezoactuator 20 is in a charged state (see FIG FIG. 1 ).
  • the recess 3 is filled in step 1 by the fluid inlet 7 with fuel at high pressure.
  • the valve body 17 of the control valve 16 is in the closed position.
  • the needle body 10 is in the closed position due to a further balance of forces.
  • step S3 the piezoactuator 20 is electrically discharged.
  • the beginning of step S3 represents the time OPP1 in which the opening operation of the injection valve 1 starts.
  • a time of a first mechanical bounce is detected by means of the piezoactuator 20.
  • the first mechanical bouncing arises from the fact that the second transmitter 24 overcomes the idle stroke L due to the axial movement of the needle body 10 and abuts against the piezoactuator 20.
  • the needle body 10 reaches the predetermined opening position (FIG. FIG. 3 ).
  • the time of detection of the first mechanical bounce thus represents the time OPP2, in which the needle body 10 reaches the predetermined opening position.
  • the program is continued after a predetermined period of time in a step S7.
  • step S7 If the injection valve 1 is operated in the operating mode partial stroke injection PSI, the program is continued in step S7 immediately after the detection of the first mechanical bounce.
  • the program is continued after a predetermined period of time in the step S3 and continued after the renewed reaching of the step S5 after a further predetermined period of time in the step S7.
  • step S7 depending on the detected time of the first mechanical bounce, the piezoactuator 20 is electrically charged, for example in a subsequent work cycle of the injection valve 1 or in the same operating cycle of the injection valve 1 in which the first mechanical bounce was detected.
  • the beginning of the step represents the time OPP3 in which the closing operation of the injection valve 1 starts.
  • a time of a further mechanical bounce is detected by means of the piezoactuator 20.
  • the further mechanical bouncing is caused by the impact of the needle body 10 on the associated valve seat in reaching the closed position of the needle body 10.
  • This further mechanical bouncing is transmitted to the piezoelectric actuator 20 via the needle body 10 and the second transmitter 24.
  • the time of the further mechanical bounce thus represents the time OPP4, in which the needle body 10 reaches the closed position.
  • the program is optionally continued after a predetermined period of time in step S3 and another cycle begins.
  • the injector 1 can use these times in the full stroke injection modes FSI, part stroke injection PSI and the boot injection BI are regulated. This can be achieved in particular for these modes of operation a very high injection accuracy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Die Erfindung betrifft ein Einspritzventil und ein Verfahren zum Betreiben des Einspitzventils. Ein Einspritzventil ist z.B. in US 5 860 597 offenbart. Wegen immer strengeren gesetzlichen Vorschriften bezüglich zulässiger Schadstoffemissionen von Brennkraftmaschinen ist eine Einspritzgenauigkeit von Einspritzventilen der Brennkraftmaschine von zentraler Bedeutung.The invention relates to an injection valve and a method for operating the Einspitzventils. An injection valve is eg in US Pat. No. 5,860,597 disclosed. Due to increasingly stringent statutory regulations regarding permissible pollutant emissions from internal combustion engines, injection accuracy of injection valves of the internal combustion engine is of central importance.

Die Aufgabe, die der Erfindung zugrunde liegt, ist es ein Einspritzventil und ein Verfahren zum Betreiben des Einspritzventils zu schaffen, die dazu beitragen, dass eine hohe Einspritzgenauigkeit des Einspritzventils erreicht wird.The object on which the invention is based is to provide an injection valve and a method for operating the injection valve, which contribute to achieving a high injection accuracy of the injection valve.

Die Aufgabe wird gelöst durch die Merkmale der unabhängigen Patentansprüche. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.The object is solved by the features of the independent claims. Advantageous embodiments of the invention are characterized in the subclaims.

Gemäß einem ersten Aspekt zeichnet sich die Erfindung aus durch ein Einspritzventil. Das Einspritzventil weist einen Injektorkörper mit einer Ausnehmung mit einem Fluidzulauf und einem Fluidablauf auf. Das Einspritzventil weist einen Nadelkörper auf, der axial beweglich in der Ausnehmung des Injektorkörpers angeordnet ist und der in einer Schließposition des Nadelkörpers einen Fluidfluss durch eine Einspritzöffnung des Injektorkörpers unterbindet und ansonsten frei gibt. Das Einspritzventil weist einen Steuerraum auf, der in der Ausnehmung angeordnet ist und der hydraulisch zwischen dem Fluidzulauf und dem Fluidablauf angeordnet ist. Das Einspritzventil weist ein Steuerventil auf mit einem Ventilkörper, das in dem Steuerraum angeordnet ist und das dazu ausgebildet ist, in einer Schließposition des Ventilkörpers einen Fluidfluss zwischen dem Steuerraum und dem Fluidablauf zu unterbinden und ansonsten freizugeben. Das Einspritzventil weist einen Piezoaktuator auf, der mechanisch mit dem Steuerventil über einen ersten Übertrager gekoppelt ist zum Öffnen des Steuerventils durch das elektrische Entladen des Piezoaktuators, wobei der Piezoaktuator zusätzlich mechanisch mit dem Nadelkörper koppelbar ist zum Schließen des Einspritzventils.According to a first aspect, the invention is characterized by an injection valve. The injection valve has an injector body with a recess with a fluid inlet and a fluid outlet. The injection valve has a needle body which is arranged to be axially movable in the recess of the injector body and which in a closed position of the needle body prevents fluid flow through an injection opening of the injector body and otherwise releases it. The injection valve has a control chamber, which is arranged in the recess and which is arranged hydraulically between the fluid inlet and the fluid outlet. The injection valve has a control valve with a valve body, which is arranged in the control chamber and which is designed to prevent a fluid flow between the control chamber and the fluid outlet in a closed position of the valve body and otherwise release. The injection valve has a piezoelectric actuator, which is mechanically coupled to the control valve via a first transformer for opening the control valve by the electrical discharge of the piezoelectric actuator, wherein the piezoelectric actuator is additionally mechanically coupled to the needle body for closing the injection valve.

Durch die mechanische Kopplung des Nadelkörpers mit dem Piezoaktuator kann mittels des Piezoaktuators mechanisches Prellen detektiert werden. Die Zeitpunkte zu denen das mechanische Prellen auftritt, können für eine Regelung des Einspritzventils genutzt werden, um somit eine hohe Einspritzgenauigkeit zu erreichen. Derartige Zeitpunkte sind insbesondere das Erreichen der Schließposition des Nadelkörpers, sowie das Erreichen einer vorgegebenen Öffnungsposition des Nadelkörpers.Due to the mechanical coupling of the needle body with the piezo actuator, mechanical bouncing can be detected by means of the piezoactuator. The times at which the mechanical bounce occurs, can be used for a control of the injection valve, thus achieving a high injection accuracy. Such times are in particular the achievement of the closed position of the needle body, as well as the achievement of a predetermined opening position of the needle body.

Gemäß einer vorteilhaften Ausgestaltung ist der Piezoaktuator mechanisch mit dem Nadelkörper über einen zweiten Übertrager koppelbar, der mit dem Nadelkörper verbunden ist.According to an advantageous embodiment of the piezoelectric actuator is mechanically coupled to the needle body via a second transformer, which is connected to the needle body.

Hierdurch kann besonders gut ein mechanisches Prellen von dem Nadelkörper auf den Piezoaktuator übertragen werden.As a result, mechanical bouncing can be transferred from the needle body to the piezoactuator particularly well.

Gemäß einer weiteren vorteilhaften Ausgestaltung ist der Piezoaktuator mechanisch mit dem Nadelkörper gekoppelt nach Überwinden eines vorgegebenen Leerhubs zwischen dem zweiten Übertrager und dem Piezoaktuator.According to a further advantageous embodiment of the piezoelectric actuator is mechanically coupled to the needle body after overcoming a predetermined idle stroke between the second transformer and the piezoelectric actuator.

Hierdurch wird sichergestellt, dass der Piezoaktuator nicht immer mechanisch mit dem Nadelkörper gekoppelt ist, so dass beispielsweise bei dem Erreichen der vorgegebenen Öffnungsposition des Nadelkörpers ein mechanisches Prellen entsteht.This ensures that the piezoelectric actuator is not always mechanically coupled to the needle body, so that, for example, when reaching the predetermined opening position the needle body produces a mechanical bouncing.

Gemäß einer weiteren vorteilhaften Ausgestaltung ist der Piezoaktuator mechanisch mit dem Nadelkörper gekoppelt bei Erreichen der Schließposition des Nadelkörpers und bei Erreichen einer vorgegebenen Öffnungsposition des Nadelkörpers.According to a further advantageous embodiment of the piezoelectric actuator is mechanically coupled to the needle body upon reaching the closed position of the needle body and upon reaching a predetermined opening position of the needle body.

Hierdurch kann insbesondere ein mechanisches Prellen bei Erreichen der Schließposition detektiert werden, sowie bei Erreichen der vorgegebenen Öffnungsposition.In this way, in particular a mechanical bouncing can be detected upon reaching the closed position, as well as upon reaching the predetermined opening position.

Gemäß einem weiteren Aspekt zeichnet sich die Erfindung aus durch ein Verfahren zum Betreiben des Einspritzventils oder einer vorteilhaften Ausgestaltung des Einspritzventils. Der Piezoaktuator wird elektrisch entladen zum Öffnen des Steuerventils mittels des ersten Übertragers und hierdurch zum Öffnen des Einspritzventils. Mittels des Piezoaktuators wird ein Zeitpunkt eines ersten mechanischen Prellens detektiert, das durch die mechanische Kopplung des Piezoaktuators mit dem Nadelkörper bei Erreichen einer vorgegebenen Öffnungsposition des Nadelkörpers auf den Piezoaktuator übertragen wird. Abhängig von dem detektierten Zeitpunkt des ersten mechanischen Prellens wird der Piezoaktuator elektrisch geladen zum Schließen des Einspritzventils mittels der mechanischen Kopplung des Piezoaktuators mit dem Nadelkörper, beispielsweise in einem Folgearbeitszyklus des Einspritzventils oder in demselben Arbeitszyklus des Einspritzventils, in dem das erste mechanische Prellen detektiert wurde.According to a further aspect, the invention is characterized by a method for operating the injection valve or an advantageous embodiment of the injection valve. The piezoactuator is electrically discharged to open the control valve by means of the first transformer and thereby to open the injection valve. By means of the piezoactuator, a time of a first mechanical bounce is detected, which is transmitted to the piezoactuator by the mechanical coupling of the piezoactuator with the needle body when a predetermined opening position of the needle body is reached. Depending on the detected time of the first mechanical bounce, the piezoactuator is electrically charged to close the injector by mechanically coupling the piezoactuator to the needle body, for example, in a follower cycle of the injector or in the same duty cycle of the injector in which the first mechanical bounce was detected.

Gemäß einer vorteilhaften Ausgestaltung wird mittels des Piezoaktuators ein Zeitpunkt eines weiteren mechanischen Prellens detektiert, das durch die mechanische Kopplung des Piezoaktuators mit dem Nadelkörper bei Erreichen der Schließposition des Nadelkörpers auf dem Piezoaktuator übertragen wird.According to an advantageous embodiment, a point in time of a further mechanical bounce is detected by means of the piezoactuator, which is achieved by the mechanical coupling of the piezoactuator with the needle body when reaching the Closed position of the needle body is transmitted to the piezoelectric actuator.

Durch die mechanische Kopplung des Piezoaktuators mit dem Nadelkörper können der Zeitpunkt des ersten mechanischen Prellens und/oder der Zeitpunkt des weiteren mechanischen Prellens detektiert werden. Diese beiden Zeitpunkte oder einer der beiden Zeitpunkte können für die Regelung des Einspritzventils genutzt werden um somit eine hohe Einspritzgenauigkeit zu erreichen.Due to the mechanical coupling of the piezoactuator with the needle body, the time of the first mechanical bounce and / or the time of the further mechanical bounce can be detected. These two times or one of the two times can be used for the control of the injection valve in order to achieve a high injection accuracy.

Die Erfindung ist im Folgenden anhand der schematischen Zeichnungen näher erläutert.The invention is explained in more detail below with reference to the schematic drawings.

Es zeigen:

Figur 1 bis Figur 6
ein Einspritzventil zu verschiedenen Betriebszeitpunkten,
Figur 7
verschiedene Betriebsmodi des Einspritzventils und
Figur 8
ein Ablaufdiagramm zum Betreiben des Einspritzventils.
Show it:
Figure 1 to Figure 6
an injection valve at different operating times,
FIG. 7
different operating modes of the injector and
FIG. 8
a flowchart for operating the injection valve.

Elemente gleicher Konstruktion oder Funktion sind figuren-übergreifend mit den gleichen Bezugszeichen gekennzeichnet.Elements of the same construction or function are marked across the figures with the same reference numerals.

Die Figuren 1 bis 6 zeigen ein Einspritzventil 1 zu verschiedenen Betriebszeitpunkten. Das Einspritzventil 1 wird anhand der Figur 2 näher erläutert.The FIGS. 1 to 6 show an injection valve 1 at different operating times. The injection valve 1 is based on the FIG. 2 explained in more detail.

Das Einspritzventil 1 weist einen Injektorkörper 2 auf. Der Injektorkörper 2 weist eine Ausnehmung 3 auf, sowie einen Fluidzulauf 7 und einen Fluidablauf 9.The injection valve 1 has an injector body 2. The injector body 2 has a recess 3, as well as a fluid inlet 7 and a fluid outlet 9.

Der Fluidzulauf 7 ist beispielsweise mit einem Kraftstoffhochdruckspeicher, wie beispielsweise einem sogenannten Common-Rail, hydraulisch gekoppelt und wird somit beispielsweise mit einem Kraftstoff unter einem Druck von beispielsweise bis zu 2500 Bar versorgt.The fluid inlet 7 is hydraulically coupled, for example, to a high-pressure fuel accumulator, such as a so-called common rail, and is thus supplied, for example, with a fuel at a pressure of, for example, up to 2500 bar.

Der Fluidablauf 9 ist mit einem Niederdruckbereich, wie beispielsweise mit einem Kraftstofftank hydraulisch gekoppelt.The fluid drain 9 is hydraulically coupled to a low pressure region, such as a fuel tank.

Das Einspritzventil 1 weist einen Nadelkörper 10 auf, der axial beweglich in der Ausnehmung 3 des Injektorkörpers 2 angeordnet ist.The injection valve 1 has a needle body 10, which is arranged axially movable in the recess 3 of the injector body 2.

In einer Schließposition des Nadelkörpers 10 sitzt der Nadelkörper 10 auf einem zugehörigen Ventilsitz des Injektorkörpers 2 auf und unterbindet hierdurch einen Fluidfluss durch eine Einspritzöffnung 12 des Injektorkörpers 2. Das Einspritzventil 1 ist somit geschlossen.In a closed position of the needle body 10 of the needle body 10 sits on an associated valve seat of the injector body 2 and thereby inhibits fluid flow through an injection port 12 of the injector body 2. The injection valve 1 is thus closed.

In einer Öffnungsposition des Nadelkörpers 10 ist der Nadelkörper 10 vorgegeben axial beabstandet von dem zugehörigen Ventilsitz und gibt hierdurch einen Fluidfluss durch die Einspritzöffnung 12 frei. Das Einspritzventil 1 ist somit geöffnet.In an open position of the needle body 10, the needle body 10 is predetermined axially spaced from the associated valve seat and thereby releases a fluid flow through the injection port 12. The injection valve 1 is thus opened.

Das Einspritzventil 1 weist einen Steuerraum 15 auf, der in der Ausnehmung 3 angeordnet ist und der hydraulisch zwischen dem Fluidzulauf 7 und dem Fluidablauf 9 angeordnet ist. Hierbei umfasst die Ausnehmung insbesondere den Raum um den Nadelkörper 10, eine hydraulische Verbindungsleitung zum Steuerraum 15 sowie den Steuerraum 15 selbst.The injection valve 1 has a control chamber 15, which is arranged in the recess 3 and which is arranged hydraulically between the fluid inlet 7 and the fluid outlet 9. In this case, the recess in particular comprises the space around the needle body 10, a hydraulic connecting line to the control chamber 15 and the control chamber 15 itself.

Das Einspritzventil 1 weist ein Steuerventil 16 mit einem Ventilkörper 17 auf. Das Steuerventil 16 ist in dem Steuerraum 15 angeordnet.The injection valve 1 has a control valve 16 with a valve body 17. The control valve 16 is arranged in the control chamber 15.

In einer Schließposition des Ventilkörpers 17 sitzt der Ventilkörper 17 auf einem zugehörigen Ventilsitz des Injektorkörpers 2 auf, wodurch ein Fluidfluss zwischen dem Steuerraum 15 und dem Fluidablauf 9 unterbunden ist.In a closed position of the valve body 17, the valve body 17 rests on an associated valve seat of the injector body 2, whereby a fluid flow between the control chamber 15 and the fluid outlet 9 is prevented.

In einer Öffnungsposition des Ventilkörpers 17 ist der Ventilkörper 17 vorgegeben axial beabstandet von dem zugehörigen Ventilsitz und gibt somit den Fluidfluss zwischen dem Steuerraum 15 und dem Fluidablauf 9 frei.In an opening position of the valve body 17, the valve body 17 is predetermined axially spaced from the associated valve seat and thus releases the fluid flow between the control chamber 15 and the fluid outlet 9.

Das Einspritzventil 1 weist einen Piezoaktuator 20 auf, der mit dem Steuerventil 16 über einen ersten Übertrager 23 gekoppelt ist zum Öffnen des Steuerventils 16.The injection valve 1 has a piezoactuator 20, which is coupled to the control valve 16 via a first transmitter 23 for opening the control valve 16.

Der Piezoaktuator 20 ist zusätzlich mechanisch mit dem Nadelkörper 10 mechanisch koppelbar, beispielsweise nach Überwinden eines vorgegebenen Leerhubs L, beispielsweise über einen zweiten Übertrager 24, der mit dem Nadelkörper 10 verbunden ist.The piezoactuator 20 is additionally mechanically mechanically coupled to the needle body 10, for example, after overcoming a predetermined idle stroke L, for example via a second transformer 24, which is connected to the needle body 10.

Das Einspritzventil 1 kann in verschiedenen Betriebsmodi betrieben werden. Figur 7 zeigt drei Betriebsmodi. Ein erster Betriebsmodus ist eine so genannte full stroke injektion FSI. Hier wird das Einspritzventil 1 eine vorgegebene Zeit geöffnet und anschließend wieder geschlossen. Ein weiterer Betriebsmodus ist eine so genannte part stroke injektion PSI. Hier wird das Einspritzventil 1 nur kurz geöffnet und sofort wieder geschlossen. Ein weiterer Betriebsmodus ist eine so genannte boost injektion BI. Hier wird das Einspritzventil 1 zuerst etwas geöffnet, nach einer vorgegebenen Zeitdauer noch weiter geöffnet und nach einer weiteren vorgegebenen Zeitdauer wieder geschlossen. Die Betriebsmodi werden durch vier Zeitpunkte repräsentiert: Ein Zeitpunkt OPP1, in dem der Öffnungsvorgang des Einspritzventils 1 beginnt; Ein oder mehrere Zeitpunkte OPP2, in dem der Nadelkörper 10 die vorgegebene Öffnungsposition erreicht; Ein Zeitpunkt OPP3, in dem der Schließvorgang des Einspritzventils 1 beginnt; Ein Zeitpunkt OPP4, in dem der Nadelkörper 10 die Schließposition erreicht.The injection valve 1 can be operated in different operating modes. FIG. 7 shows three operating modes. A first mode of operation is a so-called full stroke injection FSI. Here, the injection valve 1 is opened for a predetermined time and then closed again. Another operating mode is a so-called part stroke injection PSI. Here, the injection valve 1 is opened only briefly and immediately closed again. Another mode of operation is a so-called boost injection BI. Here, the injection valve 1 is first opened a bit, after a predetermined period of time even further opened and closed again after a further predetermined period of time. The operation modes are represented by four timings: a timing OPP1 in which the opening operation of the injector 1 starts; One or more times OPP2 in which the needle body 10 reaches the predetermined opening position; A time OPP3 in which the closing operation of the injector 1 starts; A time OPP4 in which the needle body 10 reaches the closing position.

Figur 8 zeigt ein Ablaufdiagramm eines Programms zum Betreiben des Einspritzventils 1. Das Programm kann beispielsweise von einer Steuervorrichtung SV abgearbeitet werden. FIG. 8 shows a flowchart of a program for operating the injection valve 1. The program can be processed, for example, by a control device SV.

Das Programm wird in einem Schritt S1 gestartet. In dem Schritt S1 befindet sich der Piezoaktuator 20 in einem geladenen Zustand (siehe Figur 1). Die Ausnehmung 3 ist in dem Schritt 1 durch den Fluidzulauf 7 mit Kraftstoff unter hohem Druck gefüllt. Durch ein Kräfteverhältnis, das auf den Ventilkörper 17 des Steuerventils 16 wirkt, befindet sich der Ventilkörper 17 des Steuerventils 16 in der Schließposition. Weiterhin befindet sich durch ein weiteres Kräfteverhältnis der Nadelkörper 10 in der Schließposition.The program is started in a step S1. In step S1, the piezoactuator 20 is in a charged state (see FIG FIG. 1 ). The recess 3 is filled in step 1 by the fluid inlet 7 with fuel at high pressure. By a balance of forces acting on the valve body 17 of the control valve 16, the valve body 17 of the control valve 16 is in the closed position. Furthermore, the needle body 10 is in the closed position due to a further balance of forces.

In einem Schritt S3 wird der Piezoaktuator 20 elektrisch entladen. Der Beginn des Schritts S3 repräsentiert den Zeitpunkt OPP1, in dem der Öffnungsvorgang des Einspritzventils 1 beginnt.In a step S3, the piezoactuator 20 is electrically discharged. The beginning of step S3 represents the time OPP1 in which the opening operation of the injection valve 1 starts.

Durch das elektrische Entladen zieht sich der Piezoaktuator 20 zusammen. Hierdurch wird eine Kraft von dem Piezoaktuator 20 über den ersten Mitnehmer 23 auf den Ventilkörper 17 des Steuerventils 16 übertragen, so dass sich das Steuerventil 16 öffnet. Da auf der Seite des Fluidablaufs 9 ein niedrigerer Druck herrscht als in dem Steuerraum 15, strömt Fluid von dem Steuerraum 15 in den Fluidablauf 9. Hierdurch kommt es zu einem Druckgefälle in der Ausnehmung 3. Durch dieses Druckgefälle wirkt eine Kraft auf den Nadelkörper 10, so dass dieser sich von seinem zugehörigen Ventilsitz hebt und somit die Einspritzöffnung 12 frei gibt (siehe Figur 2, Figur 3).By the electric discharge, the piezoelectric actuator 20 contracts. As a result, a force is transmitted from the piezoactuator 20 via the first driver 23 to the valve body 17 of the control valve 16, so that the control valve 16 opens. Since a lower pressure prevails on the side of the fluid outlet 9 than in the control chamber 15, fluid flows from the control chamber 15 into the fluid outlet 9. This results in a pressure gradient in the recess 3. A pressure force acts on the needle body 10. so that it lifts from its associated valve seat and thus the injection port 12 is free (see FIG. 2 . FIG. 3 ).

In einem Schritt S5 wird ein Zeitpunkt eines ersten mechanischen Prellens mittels des Piezoaktuators 20 detektiert. Das erste mechanische Prellen entsteht dadurch, dass der zweite Übertrager 24 durch die axiale Bewegung des Nadelkörpers 10 den Leerhub L überwindet und an den Piezoaktuator 20 anstößt. Hierbei erreicht der Nadelkörper 10 die vorgegebene Öffnungsposition (Figur 3). Der Zeitpunkt der Detektion des ersten mechanischen Prellens repräsentiert somit den Zeitpunkt OPP2, in dem der Nadelkörper 10 die vorgegebene Öffnungsposition erreicht.In a step S5, a time of a first mechanical bounce is detected by means of the piezoactuator 20. The first mechanical bouncing arises from the fact that the second transmitter 24 overcomes the idle stroke L due to the axial movement of the needle body 10 and abuts against the piezoactuator 20. In this case, the needle body 10 reaches the predetermined opening position (FIG. FIG. 3 ). The time of detection of the first mechanical bounce thus represents the time OPP2, in which the needle body 10 reaches the predetermined opening position.

Wird das Einspritzventil 1 in dem Betriebsmodus full stroke injection FSI betrieben, so wird das Programm nach einer vorgegebenen Zeitdauer in einem Schritt S7 fortgeführt.If the injection valve 1 is operated in the operating mode full stroke injection FSI, then the program is continued after a predetermined period of time in a step S7.

Wird das Einspritzventil 1 in dem Betriebsmodus part stroke injection PSI betrieben, so wird sofort nach der Detektion des ersten mechanischen Prellens das Programm in dem Schritt S7 fortgeführt.If the injection valve 1 is operated in the operating mode partial stroke injection PSI, the program is continued in step S7 immediately after the detection of the first mechanical bounce.

Wird das Einspritzventil 1 in dem Betriebsmodus boot injection BI betrieben, so wird das Programm nach einer vorgegebenen Zeitdauer in dem Schritt S3 fortgeführt und nach dem erneuten Erreichen des Schrittes S5 nach einer weiteren vorgegebenen Zeitdauer in dem Schritt S7 fortgeführt.If the injection valve 1 is operated in the operating mode boot injection BI, then the program is continued after a predetermined period of time in the step S3 and continued after the renewed reaching of the step S5 after a further predetermined period of time in the step S7.

In dem Schritt S7 wird abhängig von dem detektierten Zeitpunkt des ersten mechanischen Prellens der Piezoaktuator 20 elektrisch geladen, beispielsweise in einem Folgearbeitszyklus des Einspritzventils 1 oder in demselben Arbeitszyklus des Einspritzventils 1, in dem das erste mechanische Prellen detektiert wurde. Der Beginn des Schritts repräsentiert den Zeitpunkt OPP3, in dem der Schließvorgang des Einspritzventils 1 beginnt.In step S7, depending on the detected time of the first mechanical bounce, the piezoactuator 20 is electrically charged, for example in a subsequent work cycle of the injection valve 1 or in the same operating cycle of the injection valve 1 in which the first mechanical bounce was detected. The beginning of the step represents the time OPP3 in which the closing operation of the injection valve 1 starts.

Durch das elektrische Laden des Piezoaktuators 20 dehnt sich dieser aus und drückt somit mittels der mechanischen Kopplung mit dem Nadelkörper 10 oder mit dem zweiten Übertrager 24 den Nadelkörper 10 in seine Schließposition, wodurch der Fluidfluss durch die Einspritzöffnung 12 wieder unterbunden wird (Siehe Figur 4, Figur 5).As a result of the electrical charging of the piezoactuator 20, this expands and thus presses the needle body 10 into its closed position by means of the mechanical coupling with the needle body 10 or with the second transmitter 24, whereby the fluid flow through the injection opening 12 is again suppressed (see FIG FIG. 4 . FIG. 5 ).

Weiterhin wird durch das elektrische Laden des Piezoaktuators 20 die Kräftebilanz, die auf den Ventilkörper 17 des Steuerventils 16 verändert, so dass sich dieses wieder schließt (Figur 6).Furthermore, as a result of the electrical charging of the piezoactuator 20, the balance of forces which changes on the valve body 17 of the control valve 16, so that it closes again ( FIG. 6 ).

In einem Schritt S9 wird ein Zeitpunkt eines weiteren mechanischen Prellens mittels des Piezoaktuators 20 detektiert. Das weitere mechanische Prellen entsteht durch das Auftreffen des Nadelkörpers 10 auf dem zugehörigen Ventilsitz bei dem Erreichen der Schließposition des Nadelkörpers 10. Dieses weitere mechanische Prellen wird über den Nadelkörper 10 und den zweiten Übertrager 24 auf den Piezoaktuator 20 übertragen. Der Zeitpunkt des weiteren mechanischen Prellens repräsentiert somit den Zeitpunkt OPP4, in dem der Nadelkörper 10 die Schließposition erreicht.In a step S9, a time of a further mechanical bounce is detected by means of the piezoactuator 20. The further mechanical bouncing is caused by the impact of the needle body 10 on the associated valve seat in reaching the closed position of the needle body 10. This further mechanical bouncing is transmitted to the piezoelectric actuator 20 via the needle body 10 and the second transmitter 24. The time of the further mechanical bounce thus represents the time OPP4, in which the needle body 10 reaches the closed position.

Abhängig von dem Zeitpunkt des weiteren mechanischen Prellens und/oder dem Zeitpunkt des ersten mechanischen Prellens wird gegebenenfalls nach einer vorgegebenen Zeitdauer das Programm in dem Schritt S3 fortgesetzt und ein weiterer Arbeitszyklus beginnt.Depending on the time of the further mechanical bounce and / or the time of the first mechanical bounce, the program is optionally continued after a predetermined period of time in step S3 and another cycle begins.

Da der Zeitpunkt des ersten mechanischen Prellens den Zeitpunkt OPP2 des Erreichens der vorgegebenen Öffnungsposition repräsentiert und da der Zeitpunkt des weiteren mechanischen Prellens den Zeitpunkt OPP4 des Erreichens der Schließposition repräsentiert, kann das Einspritzventil 1 mittels dieser Zeitpunkte in den Betriebsmodi full stroke injection FSI, part stroke injection PSI und der boot injection BI geregelt werden. Hiermit kann insbesondere für diese Betriebsmodi eine sehr hohe Einspritzgenauigkeit erreicht werden.Since the time of the first mechanical bounce represents the time OPP2 of reaching the predetermined opening position, and since the time of the further mechanical bounce represents the time OPP4 of reaching the closing position, the injector 1 can use these times in the full stroke injection modes FSI, part stroke injection PSI and the boot injection BI are regulated. This can be achieved in particular for these modes of operation a very high injection accuracy.

Claims (6)

  1. Injection valve (1) having
    - an injector body (2) with a recess (3) and a fluid inflow (7) and a fluid outflow (9),
    - a needle body (10) which is arranged axially movably in the recess (3) of the injector body (2) and suppresses a fluid flow through an injection opening (12) of the injector body (2) in a closed position of the needle body (10) and otherwise releases it,
    - a control space (15) which is arranged in the recess (3) and is arranged hydraulically between the fluid inflow (7) and the fluid outflow (9),
    - a control valve (16) with a valve body (17), which control valve (16) is arranged in the control space (15) and is configured to suppress a fluid flow between the control space (15) and the fluid outflow (9) in a closed position of the valve body (17) and to otherwise release it,
    - a piezoelectric actuator (20) which is coupled mechanically to the control valve (16) via a first transmitter (23) for opening the control valve (16) by the electrical discharge of the piezoelectric actuator (20), it being possible for the piezoelectric actuator (20) to additionally be coupled mechanically to the needle body (10) for closing the injection valve (1).
  2. Injection valve (1) according to Claim 1, it being possible for the piezoelectric actuator (20) to be coupled mechanically to the needle body (10) via a second transmitter (24) which is connected to the needle body (10).
  3. Injection valve (1) according to Claim 2, the piezoelectric actuator (20) being coupled mechanically to the needle body (10), after a predefined idle stroke (L) between the second transmitter (24) and the piezoelectric actuator (20) has been overcome.
  4. Injection valve (1) according to one of the preceding claims, in which the piezoelectric actuator (20) is coupled mechanically to the needle body (10), when the closed position of the needle body (10) is reached and when a predefined open position of the needle body (10) is reached.
  5. Method for operating the injection valve (1) according to one of Claims 1 to 4, in which method
    - the piezoelectric actuator (20) is discharged electrically for opening the control valve (16) by means of the first transmitter (23) and for opening the injection valve (1) as a result,
    - a time of a first mechanical bounce is detected by means of the piezoelectric actuator (20), which bounce is transmitted to the piezoelectric actuator (20) by way of the mechanical coupling of the piezoelectric actuator (20) to the needle body (10) when a predefined open position of the needle body (10) is reached,
    - in a manner which is dependent on the detected time of the first mechanical bounce, the piezoelectric actuator (20) is charged electrically for closing the injection valve (1) by means of the mechanical coupling of the piezoelectric actuator (20) to the needle body (10).
  6. Method according to Claim 5, in which a time of a further mechanical bounce is detected by means of the piezoelectric actuator (20), which further mechanical bounce is transmitted to the piezoelectric actuator (20) when the closed position of the needle body (10) is reached by way of the mechanical coupling of the piezoelectric actuator (20) to the needle body (10).
EP14795965.4A 2013-10-11 2014-10-10 Injection valve and method for operating an injection valve Active EP3055550B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310220528 DE102013220528B4 (en) 2013-10-11 2013-10-11 Injection valve and method for operating an injection valve
PCT/EP2014/071809 WO2015052332A1 (en) 2013-10-11 2014-10-10 Injection valve and method for the operation of an injection valve

Publications (2)

Publication Number Publication Date
EP3055550A1 EP3055550A1 (en) 2016-08-17
EP3055550B1 true EP3055550B1 (en) 2018-02-28

Family

ID=51870987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14795965.4A Active EP3055550B1 (en) 2013-10-11 2014-10-10 Injection valve and method for operating an injection valve

Country Status (5)

Country Link
US (1) US10400698B2 (en)
EP (1) EP3055550B1 (en)
CN (1) CN105593507B (en)
DE (1) DE102013220528B4 (en)
WO (1) WO2015052332A1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2885340C (en) 2012-10-12 2016-11-08 Spirogen Sarl Pyrrolobenzodiazepines and conjugates thereof
DE102013220528B4 (en) 2013-10-11 2015-05-07 Continental Automotive Gmbh Injection valve and method for operating an injection valve
FR3024183B1 (en) * 2014-07-22 2019-07-26 Delphi Technologies Ip Limited FUEL INJECTOR
GB201416112D0 (en) 2014-09-12 2014-10-29 Medimmune Ltd Pyrrolobenzodiazepines and conjugates thereof
GB201601431D0 (en) 2016-01-26 2016-03-09 Medimmune Ltd Pyrrolobenzodiazepines
GB201602356D0 (en) 2016-02-10 2016-03-23 Medimmune Ltd Pyrrolobenzodiazepine Conjugates
GB201602359D0 (en) 2016-02-10 2016-03-23 Medimmune Ltd Pyrrolobenzodiazepine Conjugates
GB201607478D0 (en) 2016-04-29 2016-06-15 Medimmune Ltd Pyrrolobenzodiazepine Conjugates
GB201617466D0 (en) 2016-10-14 2016-11-30 Medimmune Ltd Pyrrolobenzodiazepine conjugates
PT3544636T (en) 2017-02-08 2021-05-04 Medimmune Ltd Pyrrolobenzodiazepine-antibody conjugates
GB201702031D0 (en) 2017-02-08 2017-03-22 Medlmmune Ltd Pyrrolobenzodiazepine-antibody conjugates
WO2018192944A1 (en) 2017-04-18 2018-10-25 Medimmune Limited Pyrrolobenzodiazepine conjugates
ES2906965T3 (en) 2017-08-18 2022-04-21 Medimmune Ltd Pyrrolobenzodiazepine conjugates
DE102017220328A1 (en) * 2017-11-15 2019-05-16 Robert Bosch Gmbh Vibration damping arrangement for injection systems of motor vehicles, in particular for fuel injection systems, and injection system with such a vibration damping arrangement
DE202018100337U1 (en) * 2018-01-22 2019-04-24 Liebherr-Components Deggendorf Gmbh Injector and device for detecting the state of such an injector
GB201803342D0 (en) 2018-03-01 2018-04-18 Medimmune Ltd Methods
GB201806022D0 (en) 2018-04-12 2018-05-30 Medimmune Ltd Pyrrolobenzodiazepines and conjugates thereof
DE102018125803A1 (en) * 2018-10-17 2020-04-23 Liebherr-Components Deggendorf Gmbh Injector
DE102020111787A1 (en) * 2020-04-30 2021-11-04 Liebherr-Components Deggendorf Gmbh Device for detecting the condition of a fuel injector

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1909014A (en) * 1929-12-31 1933-05-16 Firm Sulzerfreres Sa Fuel injection device for liquid fuel injection internal combustion engines
US5860597A (en) 1997-03-24 1999-01-19 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector
US6253736B1 (en) 1999-08-10 2001-07-03 Cummins Engine Company, Inc. Fuel injector nozzle assembly with feedback control
US6776390B1 (en) * 1999-08-20 2004-08-17 Robert Bosch Gmbh Valve for controlling fluids
US6420817B1 (en) * 2000-02-11 2002-07-16 Delphi Technologies, Inc. Method for detecting injection events in a piezoelectric actuated fuel injector
DE10146756C1 (en) 2001-09-22 2003-04-24 Orange Gmbh Fuel injector for common-rail fuel injection system for IC engine has motion converter between piezoactuator and valve needle
DE10326707B3 (en) * 2003-06-11 2005-01-27 Westport Germany Gmbh Valve device and method for injecting gaseous fuel
DE102005025141B3 (en) 2005-06-01 2006-09-14 Siemens Ag Valve, e.g. for dosing liquid, has controllable transfer element of variable expansion in length in the transfer path between actuator and valve needle
DE102005044389B3 (en) * 2005-09-16 2007-02-08 Siemens Ag Injection valve for hydraulic system has return line closable by second end of control needle which faces away from valve boring
DE102007006941A1 (en) 2007-02-13 2008-08-14 Robert Bosch Gmbh Injector for fuel injection system of internal-combustion engine, particularly in motor vehicle, has injector body, stepped coupler piston, in actuator section, is arranged vertically lifted in trunk piston opened for needle
DE102008042136A1 (en) * 2008-09-16 2010-03-18 Robert Bosch Gmbh Fuel injector for high-pressure accumulator injection system i.e. common rail, has servo-valve operatively generating hydraulic force in opening direction during opening process of injection-valve member
DE102008043085A1 (en) 2008-10-22 2010-04-29 Robert Bosch Gmbh Fuel injector, particularly for injecting fuel from high pressure reservoir in combustion chamber of internal combustion engine, has actuator and injection valve element which is axially moved in injector body
EP2320061A1 (en) * 2009-11-04 2011-05-11 Delphi Technologies Holding S.à.r.l. Fuel injector
DE102010008467A1 (en) 2010-02-18 2011-08-18 Continental Automotive GmbH, 30165 High pressure fuel injector for an internal combustion engine
DE102010044285B4 (en) * 2010-09-03 2014-02-27 Continental Automotive Gmbh Method and device for adjusting an idle stroke of an actuator of an injector and injector assembly
DE102011075750B4 (en) 2011-05-12 2021-02-11 Vitesco Technologies GmbH Method for determining a position of a closure element of an injection valve for an internal combustion engine
DE102013220528B4 (en) 2013-10-11 2015-05-07 Continental Automotive Gmbh Injection valve and method for operating an injection valve

Also Published As

Publication number Publication date
CN105593507B (en) 2018-08-07
DE102013220528A1 (en) 2015-04-16
WO2015052332A1 (en) 2015-04-16
EP3055550A1 (en) 2016-08-17
US10400698B2 (en) 2019-09-03
CN105593507A (en) 2016-05-18
US20160252034A1 (en) 2016-09-01
DE102013220528B4 (en) 2015-05-07

Similar Documents

Publication Publication Date Title
EP3055550B1 (en) Injection valve and method for operating an injection valve
DE102007056913A1 (en) Injector for fuel with ball valve
DE102015000310A1 (en) Current flow termination correction for common rail fuel systems
DE102009027214B4 (en) Fuel injection device
DE102008001907A1 (en) Fuel injector
WO2010009931A1 (en) Actuation of a fuel injector in the event of overpressure or fault
DE102015226070A1 (en) fuel injector
DE102008042227A1 (en) Fuel injector, particularly common rail injector for injecting fuel into combustion chamber of internal-combustion engine, comprises injection valve element, which is adjustable between closing position and opening position
DE102007005382A1 (en) Injector i.e. common rail injector, for injecting fuel e.g. diesel, into combustion chamber of internal-combustion engine, has control valve for varying control pressure, and fuel tank connected with nozzle chamber via throttle channel
EP2426348B1 (en) Fuel injector valve
DE102007034319A1 (en) injector
DE102010014208A1 (en) Method and device for operating an injection valve
EP2628939B1 (en) Fuel injector valve
DE10301822B4 (en) Method for determining the linear expansion of a piezoelectric actuator
DE102009045560A1 (en) Fuel injector, particularly common-rail-fuel injector, has actuator module which is arranged in holding body that is clamped with nozzle body by insertion of throttle plate, where nozzle needle is longitudinally guided to nozzle body
DE102019220172A1 (en) Fuel injector for an internal combustion engine
DE102010028011A1 (en) Fuel injector for common rail diesel injection system, has seal bushing arranged under formation of valve chamber that surrounds valve bolt and seal bushing such that high pressure strength of valve chamber is optimized
DE102012213535A1 (en) Fuel injector has outer contour whose diameter on case inner surface is smaller than diameter of outer contour on case outer surface
DE102013206383A1 (en) Fuel injection valve for internal combustion engines
DE102010029607A1 (en) Fuel injector comprises hydraulic coupling module, which has coupling piston and valve piston, which is axially guided in common coupling body, where supply of supply line is interconnected with high pressure line
WO2008095743A1 (en) Injector for injecting fuel into combustion chambers of internal combustion engines
DE102012204482A1 (en) Fuel injector
DE102018219233A1 (en) Electromagnetically actuated inlet valve and high pressure pump with inlet valve
DE102010005160A1 (en) Actuator unit of use in fuel injecting valve for internal-combustion engine of motor vehicle, has connector pin including end section that is arranged outside recess adjacent to another connector pin and coupled with latter pin
DE102016211334A1 (en) Pressure wave correction method

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: 20160511

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

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

INTG Intention to grant announced

Effective date: 20170926

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): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 974431

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180315

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502014007464

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20180228

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

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

Ref country code: NO

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: 20180528

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: 20180228

Ref country code: HR

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: 20180228

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: 20180228

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: 20180228

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: 20180228

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: 20180228

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

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: 20180529

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: 20180528

Ref country code: RS

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: 20180228

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: 20180228

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: 20180228

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

Ref country code: MT

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: 20180228

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 5

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

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: 20180228

Ref country code: IT

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: 20180228

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: 20180228

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: 20180228

Ref country code: AL

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: 20180228

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502014007464

Country of ref document: DE

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

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: 20180228

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: 20180228

Ref country code: SM

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: 20180228

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: 20180228

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

26N No opposition filed

Effective date: 20181129

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

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: 20180228

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: 20181010

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20181031

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

Ref country code: LU

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

Effective date: 20181010

Ref country code: MC

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: 20180228

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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: 20181031

Ref country code: LI

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

Effective date: 20181031

Ref country code: BE

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

Effective date: 20181031

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: 20181010

Ref country code: IE

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

Effective date: 20181010

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

Ref country code: TR

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: 20180228

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

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: 20180228

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502014007464

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

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

Ref country code: MK

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

Effective date: 20180228

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; INVALID AB INITIO

Effective date: 20141010

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

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: 20180628

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 974431

Country of ref document: AT

Kind code of ref document: T

Effective date: 20191010

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: 20191010

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502014007464

Country of ref document: DE

Owner name: VITESCO TECHNOLOGIES GMBH, DE

Free format text: FORMER OWNER: VITESCO TECHNOLOGIES GMBH, 30165 HANNOVER, DE

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230530

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

Ref country code: FR

Payment date: 20231026

Year of fee payment: 10

Ref country code: DE

Payment date: 20231031

Year of fee payment: 10