EP0828935B1 - Injection valve - Google Patents

Injection valve Download PDF

Info

Publication number
EP0828935B1
EP0828935B1 EP96914067A EP96914067A EP0828935B1 EP 0828935 B1 EP0828935 B1 EP 0828935B1 EP 96914067 A EP96914067 A EP 96914067A EP 96914067 A EP96914067 A EP 96914067A EP 0828935 B1 EP0828935 B1 EP 0828935B1
Authority
EP
European Patent Office
Prior art keywords
valve
plunger
needle
nozzle
primary
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.)
Expired - Lifetime
Application number
EP96914067A
Other languages
German (de)
French (fr)
Other versions
EP0828935A1 (en
Inventor
Wendelin KLÜGL
Detlev SCHÖPPE
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.)
Siemens AG
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7762839&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0828935(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0828935A1 publication Critical patent/EP0828935A1/en
Application granted granted Critical
Publication of EP0828935B1 publication Critical patent/EP0828935B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • 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
    • 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
    • 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
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions

Definitions

  • the injectors are said to improve noise, etc. can be switched quickly at high injection pressures.
  • high storage pressures when using a solenoid valve a pre-injection difficult because the switching times of the Solenoid valve are too long and the full stroke of the valve must be run through so that reproducible conditions, for example the injection quantity can be achieved.
  • the formation of the injection rate i.e. slow opening, however, quickest closing of the nozzle needle, the shaping the injection rate according to a map can hardly be possible.
  • the illustration shows a 2/2-way valve with piezo actuator.
  • the injector shown in the illustration consists of a elongated housing 6, on the lower end of which Union nut 3 is screwed on. With this cap nut 3 is an intermediate plate from the lower end of the housing 6 4 and a nozzle body 1, in which a nozzle needle 2 is kept. Both the washer 4 and the nozzle body 1 have a central bore 35 in which the nozzle needle 2 guided in the axial direction is.
  • the nozzle needle lies at the end in the drawn state 2 on an annular nozzle seat 36, in the area thereof Nozzle holes 37, 35 are provided which are the nozzle needle 2 closes.
  • the nozzle needle 2 with one Provide pressure pin 5, which is provided in a housing 6
  • Spring chamber 30 is arranged and one in the spring chamber 30 arranged nozzle spring 7 is acted on, so that the Nozzle needle 2 slightly biased towards the nozzle seat 36 and closes it.
  • the other end of the Nozzle spring 7 lies on the pressure bolt 5 opposite End of the spring chamber 30, with a shim in between 9 for setting the nozzle spring preload is arranged.
  • a small spring 17 is provided between an inner surface of the primary piston 19 and the Secondary piston 39 is arranged and the valve needle 27 presses a valve seat 40 which is connected to a secondary throttle 32 communicates.
  • the secondary choke 32 stands with the first pressure chamber 11 in connection, which also has a Primary throttle 14 and a bore 13 with the high pressure standing fuel inlet 11 is connected.
  • the Fuel inlet 12 is provided via an inlet bore 10 a second pressure chamber 41 in connection, which by a Recess is formed in the housing 6 in the area of the nozzle needle 2 is, the nozzle needle in this area stepwise is set off, so that thereby control surfaces for the nozzle needle 2 are formed.
  • the temperature compensation or the basic position of the valve is over defined column between valve needle 27 and Primary piston 19 and between primary piston 19 and secondary piston 27 reached.
  • the return 25 remains on Injector always applied with a low pressure.

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)

Abstract

The injection valve for fuel injection systems has a needle nozzle (2) fitted in a valve body (1), a fuel feed (12) and a control device. The injection rate is to be precisely adjustable. This is attained in that there is a pressure chamber (11) which is connected to the fuel feed (12) via a primary throttle (14) and to a relief chamber (31) via a secondary throttle (32). The invention is applicable to diesel fuel injection systems.

Description

Die Erfindung betrifft ein Einspritzventil nach dem Oberbegriff des Patentanspruchs 1 (DE-C-4 341 739).The invention relates to an injection valve according to the preamble of claim 1 (DE-C-4 341 739).

Ein piezoelektrischer Aktor mit hydraulischer Hub - übersetzung für Steuerventile von Einspritzsystemen ist aus der DE-A-4 119 467 bekannt.A piezoelectric actuator with hydraulic stroke - translation for control valves of injection systems is known from DE-A-4 119 467.

Um insbesondere Einspritzventile zu erhalten, mit denen auch eine Voreinspritzung möglich ist, um damit Verbrauch, Abgaswerte, Geräusch usw. zu verbessern, sollen die Einspritzventile bei hohen Einspritzdrücken schnell schaltbar sein. Bei hohen Speicherdrücken ist bei Verwendung eines Magnetventils eine Voreinspritzung schwer möglich, da die Schaltzeiten des Magnetventils zu lang sind und der volle Hub des Ventils durchlaufen werden muß, damit reproduzierbare Bedingungen, beispielsweise die Einspritzmenge, erreicht werden. Außerdem ist die Formung der Einspritzrate, d.h. langsames Öffnen, jedoch schnellstes Schließen der Düsennadel, wobei die Formung der Einspritzrate gemäß einem Kennfeld vorgenommen werden kann, kaum möglich.In particular, to get injectors with which too a pre-injection is possible to reduce consumption, exhaust gas values, The injectors are said to improve noise, etc. can be switched quickly at high injection pressures. At high storage pressures when using a solenoid valve a pre-injection difficult because the switching times of the Solenoid valve are too long and the full stroke of the valve must be run through so that reproducible conditions, for example the injection quantity can be achieved. Moreover is the formation of the injection rate, i.e. slow opening, however, quickest closing of the nozzle needle, the shaping the injection rate according to a map can hardly be possible.

Es ist Aufgabe der vorliegenden Erfindung, ein Einspritzventil bereitzustellen, mit dem es möglich ist, die Einspritzrate präzise zu regeln, d.h., kleinste reproduzierbare Voreinspritzmengen, langsame Erhöhung der Einspritzrate zu Beginn der Einspritzung bei schnellem Schließen der Düsennadel zu ermöglichen.It is an object of the present invention to provide an injection valve with which it is possible to provide the injection rate precise control, i.e. the smallest reproducible pre-injection quantities, slow increase in injection rate too Injection begins when the nozzle needle closes quickly to enable.

Diese Aufgabe wird gemäß dem Patentanspruch 1 gelöst. Vorteilhafte Weiterbildungen sind in den Unteransprüchen gekennzeichnet.This object is achieved according to claim 1. Beneficial Further training is characterized in the subclaims.

Im folgenden wird die Erfindung anhand einer Abbildung näher erläutert.In the following, the invention is illustrated by an illustration explained.

Die Abbildung zeigt ein 2/2-Wegeventil mit Piezoantrieb.The illustration shows a 2/2-way valve with piezo actuator.

Das in der Abbildung gezeigte Einspritzventil besteht aus einem langgestreckten Gehäuse 6, auf dessen unterem Ende eine Überwurfmutter 3 aufgeschraubt ist. Mit dieser Überwurfmutter 3 wird vom unteren Ende des Gehäuses 6 aus eine Zwischenscheibe 4 und ein Düsenkörper 1, in welchem eine Düsennadel 2 geführt ist, gehalten. Sowohl die Zwischenscheibe 4 als auch der Düsenkörper 1 weisen eine Mittelbohrung 35 auf, in der die Düsennadel 2 in axialer Richtung verschiebbar geführt ist. An ihrem Ende liegt im gezeichneten Zustand die Düsennadel 2 an einem ringförmigen Düsensitz 36 an, in dessen Bereich Düsenlöcher 37, 35 vorgesehen sind, die die Düsennadel 2 verschließt. Am anderen Ende ist die Düsennadel 2 mit einem Druckbolzen 5 versehen, der in einem im Gehäuse 6 vorgesehenen Federraum 30 angeordnet ist und von einer im Federraum 30 angeordneten Düsenfeder 7 beaufschlagt wird, so daß die Düsennadel 2 leicht in Richtung auf den Düsensitz 36 vorgespannt wird und diesen verschließt. Das andere Ende der Düsenfeder 7 liegt an dem dem Druckbolzen 5 gegenüberliegenden Ende des Federraums 30 an, wobei dazwischen eine Einstellscheibe 9 zur Einstellung der Düsenfedervorspannkraft angeordnet ist. Mit dem Druckbolzen 5 steht an einem Ende ein Schließkolben 8 in Verbindung, der teilweise von der Düsenfeder 7 umfaßt wird und an seinem anderen Ende in Bereich eines ersten Druckraums 11 endet.The injector shown in the illustration consists of a elongated housing 6, on the lower end of which Union nut 3 is screwed on. With this cap nut 3 is an intermediate plate from the lower end of the housing 6 4 and a nozzle body 1, in which a nozzle needle 2 is kept. Both the washer 4 and the nozzle body 1 have a central bore 35 in which the nozzle needle 2 guided in the axial direction is. The nozzle needle lies at the end in the drawn state 2 on an annular nozzle seat 36, in the area thereof Nozzle holes 37, 35 are provided which are the nozzle needle 2 closes. At the other end is the nozzle needle 2 with one Provide pressure pin 5, which is provided in a housing 6 Spring chamber 30 is arranged and one in the spring chamber 30 arranged nozzle spring 7 is acted on, so that the Nozzle needle 2 slightly biased towards the nozzle seat 36 and closes it. The other end of the Nozzle spring 7 lies on the pressure bolt 5 opposite End of the spring chamber 30, with a shim in between 9 for setting the nozzle spring preload is arranged. With the pressure pin 5 is at one end Locking piston 8 in connection, partially by the nozzle spring 7 is included and at its other end in the area of a first pressure chamber 11 ends.

Mit dem Gehäuse 6 ist im oberen Teil der Einspritzdüse eine Ansteuereinrichtung für die Düsennadel 2 fest verbunden. Im Inneren des Ansteuergehäuses ist ein hydraulisch übersetzter Piezoantrieb vorgesehen, der aus einem Piezoaktor 20 besteht, der in einem Verschluß 21 gelagert ist, wobei dieser durch einen O-Ring 22 abgedichtet ist. Ein Sicherungsring 24 sichert den Piezoaktor 20 im Ansteuergehäuse in axialer Richtung. Die elektrische Verbindung zum Piezoaktor 20 wird über die elektrischen Anschlüsse 23 hergestellt. Der Piezoaktor 20 liegt an einem Primärkolben 19 an, der auf eine Tellerfeder 16, die einen großen Durchmesser aufweist, einwirkt. Im Inneren des Primärkolbens 19 ist ein Sekundärkolben 39 vorgesehen, der mit einer Ventilnadel 27 fest verbunden ist. Im Sekundärkolben 39 ist eine kleine Feder 17 vorgesehen, die zwischen einer Innenfläche des Primärkolbens 19 und dem Sekundärkolben 39 angeorndet ist und die Ventilnadel 27 auf einen Ventilsitz 40 drückt, der mit einer Sekundärdrossel 32 in Verbindung steht. Die Sekundärdrossel 32 steht mit dem ersten Druckraum 11 in Verbindung, der außerdem über eine Primärdrossel 14 und eine Bohrung 13 mit dem unter Hochdruck stehenden Kraftstoffzulauf 11 in Verbindung steht. Der Kraftstoffzulauf 12 steht über eine Zulaufbohrung 10 mit einem zweiten Druckraum 41 in Verbindung, der durch eine Ausnehmung im Gehäuse 6 im Bereich der Düsennadel 2 gebildet ist, wobei die Düsennadel in diesem Bereich stufenartig abgesetzt ist, so daß dadurch Steuerflächen für die Düsennadel 2 gebildet werden.With the housing 6 is in the upper part of the injector Control device for the nozzle needle 2 firmly connected. in the Inside the control housing is a hydraulically translated Provided piezo drive, which consists of a piezo actuator 20, which is stored in a closure 21, this by an O-ring 22 is sealed. A locking ring 24 secures the piezo actuator 20 in the control housing in the axial direction. The electrical connection to the piezo actuator 20 is via the electrical connections 23 are made. The piezo actuator 20 bears against a primary piston 19 which is on a plate spring 16, which has a large diameter, acts. in the A secondary piston 39 is provided inside the primary piston 19, which is firmly connected to a valve needle 27. in the Secondary piston 39, a small spring 17 is provided between an inner surface of the primary piston 19 and the Secondary piston 39 is arranged and the valve needle 27 presses a valve seat 40 which is connected to a secondary throttle 32 communicates. The secondary choke 32 stands with the first pressure chamber 11 in connection, which also has a Primary throttle 14 and a bore 13 with the high pressure standing fuel inlet 11 is connected. The Fuel inlet 12 is provided via an inlet bore 10 a second pressure chamber 41 in connection, which by a Recess is formed in the housing 6 in the area of the nozzle needle 2 is, the nozzle needle in this area stepwise is set off, so that thereby control surfaces for the nozzle needle 2 are formed.

Der Raum 31 im Bereich des Ventilsitzes 40 bildet einen Entlastungsraum sowie im Bedarfsfall eine weitere Drossel zur Formung der Einspritzung und steht mit einem Niederdruckzulauf 29 in Verbindung, mit dem außerdem eine Leckagebohrung 33, die in den Federraum 30 mündet, verbunden ist. Weiter steht der Niederdruckzulauf 29 mit einem Füllzulauf 34 zum Arbeitsraum 28 des Piezoantriebs und einer Entlastungsbohrung 18 über einen Leckageraum 26 mit einem Rücklauf 25 in Verbindung.The space 31 in the region of the valve seat 40 forms one Relief chamber and, if necessary, another throttle Formation of the injection and stands with a low pressure inlet 29 in connection with which there is also a leakage hole 33, which opens into the spring chamber 30, is connected. Further is the low pressure inlet 29 with a filling inlet 34 Working space 28 of the piezo drive and a relief bore 18 via a leakage space 26 with a return 25 in connection.

Die Funktionsweise des Einspritzventils ist wie folgt.The injection valve works as follows.

Es sei zunächst angenommen, daß der Piezoaktor 20 spannungslos ist. Damit liegt die Ventilnadel 27 aufgrund der Kraft der Feder 17 im Sekundärkolben 39 auf ihrem Sitz 40 an, wodurch die Sekundärdrossel 15 verschlossen und somit die Verbindung zum Niederdruckzulauf 29 unterbrochen ist. Der Hochdruck liegt damit über die Primärdrossel 14 an der oberen großen Fläche des Schließkolbens 8 an. Weiter liegt der Hochdruck an der abgestuften kleineren wirksamen Fläche der Düsennadel 2 im zweiten Druckraum 41 an, so daß aufgrund der wirksamen Flächen die Düsennadel 2 (auch ohne die Wirkung der Feder 7) auf ihren Sitz 36 gedrückt wird, der die Düsenöffnungen 37, 38 verschließt. Über eine Bohrung 15 und die Sekundärdrossel 32 liegt der Hochdruck außerdem am Ventilsitz 40 an.It is initially assumed that the piezo actuator 20 has no voltage is. So that the valve needle 27 is due to Force of the spring 17 in the secondary piston 39 on its seat 40, whereby the secondary throttle 15 is closed and thus the Connection to the low pressure inlet 29 is interrupted. The High pressure is thus via the primary throttle 14 on the upper one large area of the locking piston 8. The lies further High pressure on the graded smaller effective area of the Nozzle needle 2 in the second pressure chamber 41, so that due to the effective areas, the nozzle needle 2 (even without the effect of Spring 7) is pressed onto its seat 36, the nozzle openings 37, 38 closes. Via a bore 15 and the Secondary throttle 32, the high pressure is also on the valve seat 40 on.

Wird nun die Ventilnadel 27 geöffnet, so entweicht durch die Sekundärdrossel 32 ein Kraftstoff-Volumenstrom. Ist dieser Volumenstrom größer als der durch die Primärdrossel 14 zugeführte Volumenstrom, so sinkt der Druck im ersten Druckraum 11 oberhalb des Schließkolbens 8, so daß die Düsennadel 2 öffnet, wodurch die Einspritzung des Kraftstoffs freigegeben wird. Wird die Ventilnadel 27 geschlossen, so erhöht sich der Druck im ersten Druckraum 11 und die Düsennadel 2 wird wieder auf ihren Sitz 36 gedrückt.If the valve needle 27 is now opened, it escapes through the Secondary throttle 32 a fuel volume flow. Is this Volume flow greater than that supplied by the primary throttle 14 Volume flow, the pressure in the first pressure chamber drops 11 above the closing piston 8, so that the nozzle needle 2 opens, which releases the fuel injection becomes. If the valve needle 27 is closed, the increases Pressure in the first pressure chamber 11 and the nozzle needle 2 is again pressed onto their seat 36.

Die Antriebseinrichtung für die Ventilnadel 27 arbeitet wie folgt.The drive device for the valve needle 27 works as follows.

Zum Öffnen der Ventilnadel 27 wird der Piezoaktor 20 geladen. Dabei dehnt er sich aus und schiebt den Primärkolben 19 gegen die Kraft der Tellerfeder 16 nach unten. Der Arbeitsraum 28 ist vollständig mit Kraftstoff gefüllt, wodurch der Sekundäkolben 39 mit der Ventilnadel 27 gegen die Federkraft der Feder 17 nach oben bewegt wird. Dadurch wird das Ventil geöffnet. Bei Entladen des Piezoaktors 20 wird die Ventilnadel 27 entsprechend wieder geschlossen.To open the valve needle 27, the piezo actuator 20 is charged. It expands and pushes the primary piston 19 against the force of the plate spring 16 down. The work space 28 is completely filled with fuel, causing the Secondary piston 39 with the valve needle 27 against the spring force the spring 17 is moved upwards. This will make the valve open. When the piezo actuator 20 is discharged, the valve needle 27 closed again accordingly.

Der Temperaturausgleich bzw. die Grundstellung des Ventils wird über definierte Spalte zwischen Ventilnadel 27 und Primäkolben 19 und zwischen Primärkolben 19 und Sekundärkolben 27 erreicht. Um eine ständige vollständige Befüllung des Arbeitsraums 28 zu gewährleisten, bleibt der Rücklauf 25 am Einspritzventil immer mit einem Niederdruck beaufschlagt.The temperature compensation or the basic position of the valve is over defined column between valve needle 27 and Primary piston 19 and between primary piston 19 and secondary piston 27 reached. In order to ensure that the To ensure work space 28, the return 25 remains on Injector always applied with a low pressure.

Claims (5)

  1. Injection valve for fuel injection systems, with
    a nozzle needle (2) mounted in a valve housing (1), said nozzle needle being biased against a nozzle seat (36) by a nozzle spring (7) and able to open and close at least one injection nozzle orifice (37, 38),
    a fuel inlet (12) which is connected to a first control surface via a first pressure chamber (11) and to a second control surface of the nozzle needle (2) via a second pressure chamber (41), a pressure applied to the first control surface pressing the nozzle needle (2) onto the assigned nozzle seat (36) and a pressure applied to the second control surface lifting the nozzle needle (2) off the nozzle seat (36),
    a control device controlling a valve needle (27) to relieve the pressure on the first control surface to control the injection of fuel,
    the first pressure chamber (11) being connected to the fuel inlet (12) via a primary throttle (14) and to a relief chamber (31) via a secondary throttle (32),
    characterised in that
    the control device has a piezoelectric actuator (20) which controls the valve needle (27) via a hydraulic translator (19), said valve needle controlling the flow through the secondary throttle (32) and that
    gaps are provided between the valve needle (27) and the valve housing (1) and between a primary plunger (19) containing the control device and a secondary plunger (39) and between primary plunger (19) and the valve housing (1), a slight leakage being possible via said gaps, causing a working chamber (28) always to be filled with fluid, and that on thermal expansion the piezoelectric control device has an initial state that is backlash-compensated, compressively pre-stressed and uniquely defined.
  2. Injection valve according to Claim 1, characterised in that the actuator (20) is mounted on a primary plunger (19),
    a secondary plunger (39) is guided in the primary plunger (19), the primary plunger (19), the secondary plunger (39) and the valve housing (1) delimiting a working chamber (28),
    the working chamber (28) is filled with fluid so that the secondary plunger (39) is moved against the direction of travel of the primary plunger (19) when the primary plunger (19) is moved,
    the secondary plunger (39) is connected to the valve needle (27) which rests on a valve seat (40),
    when the piezoelectric actuator (20) is displaced, the secondary plunger (39) is moved contrary to the primary plunger (19) and the valve needle (27) lifts off the valve seat (40) so that the secondary throttle (15) is opened.
  3. Injection valve according to Claim 1, characterised in that the relief chamber (31) is embodied as another throttle.
  4. Injection valve according to Claim 1, characterised in that the primary and secondary throttles (14, 32) are designed such that the volume flow of fuel through the secondary throttle (32) when the valve needle (27) is opened is greater than through the primary throttle (14).
  5. Injection valve according to Claim 1, characterised in that the valve needle (27) is designed as a seated valve which regulates the degree of opening of the orifice of the secondary throttle (32) facing away from the pressure chamber (11).
EP96914067A 1995-05-24 1996-05-11 Injection valve Expired - Lifetime EP0828935B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19519192A DE19519192C1 (en) 1995-05-24 1995-05-24 Injector
DE19519192 1995-05-24
PCT/DE1996/000816 WO1996037697A1 (en) 1995-05-24 1996-05-11 Injection valve

Publications (2)

Publication Number Publication Date
EP0828935A1 EP0828935A1 (en) 1998-03-18
EP0828935B1 true EP0828935B1 (en) 2000-01-26

Family

ID=7762839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96914067A Expired - Lifetime EP0828935B1 (en) 1995-05-24 1996-05-11 Injection valve

Country Status (3)

Country Link
EP (1) EP0828935B1 (en)
DE (2) DE19519192C1 (en)
WO (1) WO1996037697A1 (en)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5779149A (en) * 1996-07-02 1998-07-14 Siemens Automotive Corporation Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke
DE19709794A1 (en) * 1997-03-10 1998-09-17 Bosch Gmbh Robert Valve for controlling liquids
DE19724637A1 (en) * 1997-06-11 1998-12-17 Bosch Gmbh Robert Injector
DE19726125C2 (en) * 1997-06-20 1999-04-15 Telefunken Microelectron Fuel injection method
DE19732802A1 (en) 1997-07-30 1999-02-04 Bosch Gmbh Robert Fuel injection device for internal combustion engines
DE19743668A1 (en) * 1997-10-02 1999-04-08 Bosch Gmbh Robert Fuel injection valve for motor vehicle IC engine
DE19881448D2 (en) * 1997-10-07 2000-04-13 Fev Motorentech Gmbh Injection nozzle with piezoelectric actuator
GB9725804D0 (en) * 1997-12-06 1998-02-04 Lucas Ind Plc Fuel injector
DE19813983A1 (en) * 1998-03-28 1999-09-30 Bosch Gmbh Robert Valve for controlling liquids
DE19835494C2 (en) * 1998-08-06 2000-06-21 Bosch Gmbh Robert Pump-nozzle unit
DE19851285C5 (en) * 1998-11-06 2007-02-08 Siemens Ag Test device for a fuel injection valve
DE19902807C1 (en) * 1999-01-25 2000-06-08 Siemens Ag Play setting between actuator and servovalve driven by actuator in fuel injector
DE60022991T2 (en) * 1999-03-18 2006-07-13 Delphi Technologies, Inc., Troy FUEL INJECTOR
DE19921242C1 (en) 1999-05-07 2000-10-26 Siemens Ag Method of positioning control drive in common rail fuel injector for motor vehicle internal combustion engine
DE19946732B4 (en) * 1999-09-29 2004-07-15 Siemens Ag Device for transmitting a deflection of an actuator to an actuator and fuel injector with such a device
DE19950223A1 (en) * 1999-10-19 2001-04-26 Bosch Gmbh Robert Injector for common rail injection system for IC engines has end face of valve piston larger than hole, this being larger than sealing line between needle and needle seat
DE19951004A1 (en) * 1999-10-22 2001-04-26 Bosch Gmbh Robert Hydraulic regulator esp. for fuel injector for motor vehicles has hydraulic converter between actor and valve member, to reverse actor movement
DE19951964A1 (en) * 1999-10-28 2001-05-03 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
GB9925410D0 (en) * 1999-10-28 1999-12-29 Lucus Ind Plc Actuator arrangement
DE19954802A1 (en) 1999-11-13 2001-05-17 Bosch Gmbh Robert Fuel injector
DE10029629A1 (en) * 2000-06-15 2002-01-03 Bosch Gmbh Robert Fuel injection device for internal combustion engines
DE10042231B4 (en) * 2000-08-28 2004-09-30 Siemens Ag Injection valve for injecting fuel into an internal combustion engine and method for controlling the opening and closing process of a nozzle needle of an injection valve
DE10043625C2 (en) * 2000-09-05 2003-03-27 Bosch Gmbh Robert Hydraulically translated valve
DE10062896B4 (en) * 2000-12-16 2009-12-17 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
DE10145622B4 (en) * 2001-09-15 2009-09-10 Robert Bosch Gmbh Valve for controlling fluids
DE10151688A1 (en) * 2001-10-19 2003-04-30 Bosch Gmbh Robert Valve for controlling liquids
DE10218024A1 (en) * 2002-04-23 2003-11-06 Bosch Gmbh Robert Fuel injection device for an internal combustion engine
JP2004052619A (en) * 2002-07-18 2004-02-19 Ngk Insulators Ltd Liquid injection device
DE60304569T2 (en) * 2003-05-30 2006-09-14 Siemens Vdo Automotive S.P.A., Fauglia Assembly of an injector
DE10332090B4 (en) * 2003-07-15 2011-08-11 Robert Bosch GmbH, 70469 Fuel injector
DE10333752A1 (en) * 2003-07-24 2005-02-24 Robert Bosch Gmbh Fuel injection device for combustion engine has movable valve part with direction of opening movement coinciding with fuel flow direction from control chamber, control valve force-balanced by pressure on piston in filling chamber

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE91752T1 (en) * 1985-12-02 1993-08-15 Marco Alfredo Ganser CONTROL DEVICE FOR ELECTRO-HYDRAULICALLY ACTUATED FUEL INJECTION VALVES.
JPH01187363A (en) * 1988-01-21 1989-07-26 Toyota Motor Corp Fuel injection valve for internal combustion engine
WO1992012341A1 (en) * 1991-01-14 1992-07-23 Nippondenso Co., Ltd. Pressure accumulation type fuel jetting device
DE4119467C2 (en) * 1991-06-13 1996-10-17 Daimler Benz Ag Device for force and stroke transmission or transmission operating according to the displacement principle
DE4340305C2 (en) * 1993-11-26 1998-02-19 Daimler Benz Ag Fuel injection nozzle for an internal combustion engine
DE4341739C1 (en) * 1993-12-08 1995-03-30 Mtu Friedrichshafen Gmbh Injection system
DE4404050C1 (en) * 1994-02-09 1994-12-01 Daimler Benz Ag Injector with solenoid-valve control for an internal combustion engine

Also Published As

Publication number Publication date
DE19519192C1 (en) 1996-06-05
EP0828935A1 (en) 1998-03-18
DE59604308D1 (en) 2000-03-02
WO1996037697A1 (en) 1996-11-28

Similar Documents

Publication Publication Date Title
EP0828935B1 (en) Injection valve
EP0828936B1 (en) Injection valve
EP0959243B1 (en) Control valve for a fuel injector
EP1379775B1 (en) Valve for controlling liquids
DE19709794A1 (en) Valve for controlling liquids
EP0908617A1 (en) Fuel injection apparatus
EP0976924B1 (en) Injector with a servo valve
WO2008049669A1 (en) Injector with an axial pressure-compensating control valve
EP1269008A1 (en) Injection valve with bypass throttle
DE19946906A1 (en) Fuel injection valve for internal combustion engines
WO2008061844A1 (en) Fuel injector
EP1927748A2 (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
DE10050599B4 (en) Injection valve with a pump piston
EP0752060B1 (en) Injection valve
EP0920583A1 (en) Valve for controlling liquids
DE19947196A1 (en) Fuel injection device for diesel engine has control valve for regulating fuel feed from high pressure space to injection valve
EP3184803B1 (en) Fuel injector
DE10046875A1 (en) Control valve for injector nozzles replacespiston sleeve guide with insert floating radially relative to the valve housing
DE19958239A1 (en) Hydraulic valve for IC engine fuel injection valve
WO2001027462A1 (en) Injector for a common-rail fuel injection system for internal combustion engines with partial compensation of the forces acting on the nozzle needle
EP2084390A1 (en) Injector with an axial pressure-compensating control valve
DE102015226373A1 (en) fuel injector
WO2006010650A1 (en) Fuel injection device
DE102005028486A1 (en) Fuel injector for use with common rail injection system in cylinder of internal combustion engine, has control space arranged in lower section of nozzle needle, and piezoelectric actuator producing very short fuel injection impulses

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: 19971120

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19990624

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 59604308

Country of ref document: DE

Date of ref document: 20000302

ITF It: translation for a ep patent filed
ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: ROBERT BOSCH GMBH

Effective date: 20001024

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

RDAH Patent revoked

Free format text: ORIGINAL CODE: EPIDOS REVO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APBY Invitation to file observations in appeal sent

Free format text: ORIGINAL CODE: EPIDOSNOBA2O

APBU Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9O

PLCK Communication despatched that opposition was rejected

Free format text: ORIGINAL CODE: EPIDOSNREJ1

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

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

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 20040217

APAA Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOS REFN

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

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

Ref country code: DE

Payment date: 20080620

Year of fee payment: 13

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: 20091201

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 59604308

Country of ref document: DE

Owner name: PAPST LICENSING GMBH & CO. KG, DE

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

Effective date: 20111202

Ref country code: DE

Ref legal event code: R081

Ref document number: 59604308

Country of ref document: DE

Owner name: WENDELIN KLUEGL, DE

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

Effective date: 20111202

Ref country code: DE

Ref legal event code: R081

Ref document number: 59604308

Country of ref document: DE

Owner name: KLUEGL, WENDELIN, DE

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

Effective date: 20111202

REG Reference to a national code

Ref country code: DE

Ref legal event code: R073

Ref document number: 59604308

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R006

Ref document number: 59604308

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R008

Ref document number: 59604308

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59604308

Country of ref document: DE

Effective date: 20121201

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: 20121201

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Owner name: PAPST LICENSING GMBH & CO. KG., DE

Effective date: 20130903

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 59604308

Country of ref document: DE

Owner name: PAPST LICENSING GMBH & CO. KG, DE

Free format text: FORMER OWNER: KLUEGL, WENDELIN, 92358 SEUBERSDORF, DE

Effective date: 20131024

REG Reference to a national code

Ref country code: DE

Ref legal event code: R011

Ref document number: 59604308

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

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

Ref country code: IT

Payment date: 20150519

Year of fee payment: 20

Ref country code: FR

Payment date: 20150519

Year of fee payment: 20