EP1103718B1 - Réglage de la course entre un actionneur et un élément de transmission pour une soupape dans un injecteur de combustible - Google Patents

Réglage de la course entre un actionneur et un élément de transmission pour une soupape dans un injecteur de combustible Download PDF

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Publication number
EP1103718B1
EP1103718B1 EP00125706A EP00125706A EP1103718B1 EP 1103718 B1 EP1103718 B1 EP 1103718B1 EP 00125706 A EP00125706 A EP 00125706A EP 00125706 A EP00125706 A EP 00125706A EP 1103718 B1 EP1103718 B1 EP 1103718B1
Authority
EP
European Patent Office
Prior art keywords
actuator
valve
injector
fuel injector
transmission element
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
EP00125706A
Other languages
German (de)
English (en)
Other versions
EP1103718A2 (fr
EP1103718A3 (fr
Inventor
Thomas Beckmann
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1103718A2 publication Critical patent/EP1103718A2/fr
Publication of EP1103718A3 publication Critical patent/EP1103718A3/fr
Application granted granted Critical
Publication of EP1103718B1 publication Critical patent/EP1103718B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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

Definitions

  • the invention relates to a method for positioning a Actuator in a fuel injector and a device to carry out such a method.
  • This accumulator injection system becomes fuel conveyed by means of a high pressure pump into a high-pressure accumulator, from which the fuel with the help of fuel injectors is injected in internal combustion engines.
  • the Fuel injector has an injection valve, which by a Servovalve is opened and closed to the temporal Set course of the injection process in the combustion chamber.
  • the servo valve is thereby controlled by an electrically Actuator, in particular by a piezo actuator, actuated.
  • a piezo actuator is by applying electrical voltage caused a longitudinal strain.
  • This Leerhubeingna is according to the prior art So far made so that the exact arrangement of the individual Components of the fuel injector, in particular their Distances from each other, calculated from the dimensions of this Components are determined. This requires every component to be measured individually. After measuring, the idle stroke then through between the injector housing and the actuator housing arranged shims that only minimal Tolerances may have and therefore consuming too finished are. To check the idle stroke thus set is it is necessary to assemble the fuel injector and under operating conditions. If malfunction be determined, the fuel injector after the Test run be disassembled again. Then you need the shims possibly elaborately refinished or replaced become.
  • WO 96 41947 A is a method for positioning a Actuator in a housing of a fuel injector known with a valve, wherein a plastically deformable Spacer element is inserted into the housing, wherein the spacer element according to the desired idle stroke of the valve is permanently compressed and at the spacer element abutting the actuator housing on the housing of the fuel injector is attached.
  • the first Stroke of a spacer-mounted fuel injector measured.
  • the decomposition takes place of the injector and the spacer is on the for deforms the required stroke required degree. After all the injection valve with the deformed spacer again fully assembled.
  • the object of the present invention is a simple process for accurately positioning an actuator in a Fuel injector, and a device for carrying to provide such a method.
  • the method according to claim 1 and the device according to Claim 4 are particularly easy to implement then, when adjusting the position of the actuator in Injector housing already during deformation of the spacer made by the pressing process with the actuator housing itself can be.
  • the actuator housing As a punch
  • the press die is designed such that he on reaching the setting of the desired idle stroke the transmission element just touched or actuated, whereby the pressing or positioning process finished micrometer accurate becomes.
  • a fuel injector 1 according to Figure 1 consists essentially from an injection valve 3, an injection nozzle 5, a actuator 19 contained in an injector head 7 (FIG 3) and an actuator port 9.
  • a high-pressure inlet 11 above the fuel below very high pressure can be supplied, as well as a leakage process 13, about the excess fuel from the fuel injector 1 in a fuel tank (not shown) can be attributed.
  • an actuator housing 17 At the injector head 7 is an actuator housing 17 by means of a hollow screw 15 exactly fixed and in particular in Aktorltician immovable attached.
  • the actuator 19 in the injector head 7 is shown in FIG. 3 essentially arranged in the actuator housing 17 Piezo actuator 21 and a servo valve 23, which in a stage trained inner bore 25 mounted in the injector head 7 are.
  • the piezoelectric actuator 21 is in known per se Way of several stacked piezo elements together, in the actuator housing 17 between a top plate 27 and a bottom plate 29, the valve side a having circular top, are biased. It is the Position of the bottom plate attachment, for example, such that its end face exactly flush with the valve side End face of the actuator housing 17 when not actuated actuator concludes.
  • the piezo-actuator 21 is further conductive over from the top plate 27 protruding pins with the Actuator 9 connected, so that the actuator port 9 Voltage applied to the piezoelectric actuator 21 and thus its expansion can be caused controlled.
  • the piezo actuator 21 is at the upper end of the stepped inner bore 25 fixed in the injector 7.
  • This is the actuator housing 17 with its valve-side end face on a per se known metallic, plastically suitable deformed compression ring 31 pressed.
  • the compression ring 31 is located on an annular circulating support disk 33. This in turn is on one Paragraph disposed in the inner bore 25 of the injector head 7.
  • the actuator housing 17 is by means of the hollow screw 15 firmly pressed against the compression ring 31 and in this position kept exactly defined on the injector head. Can do this the hollow screw 15 and the injector 17 corresponding Have paragraphs or designed otherwise suitable be.
  • the generated by Elektrostritation longitudinal expansion of the piezo actuator 21 and the movement of the bottom plate 29 in the longitudinal direction of the actuator is formed by a lever 35 as a translator Transfer element transmitted to the servo valve 23 and amplified by about a factor of 1.5.
  • the working stroke is typically around 40 ⁇ m.
  • the lever translator 35 is between the circular attachment to the bottom plate 29th the piezo actuator 21 and a valve piston 37 of the servo valve 23 arranged and with a leg on one in the Inner bore 25 of the injector head 7 below the guide disc 39 arranged support plate 33 is immovably supported.
  • the valve piston 37 continues to lie on a valve mushroom 41 on, at rest on a valve spring 43 a valve seat 45 in the inner bore 25 of the injector head 7 is pressed.
  • the adjusting device has a known per se Feed device 51, which is the vertical movement a press ram 53 in the direction of arrow according to Figure 2 micrometer accurate controls.
  • the ram 53 has a heel-shaped Leerhubeinstellelement protruding from the die surface 55 on. This is made of an electrically conductive Material is formed and electrically isolated from Press ram 53 attached in this.
  • the supernatant of the Leerhubeinstellelementes 55 corresponds to the desired Leerhub 1 of the valve to be adjusted, where in each case the exact Position of the actuating surface of the base plate attachment 29 ( Figure 3) relative to the valve-side bearing surface of the actuator housing is to be considered in the idle state of the actuator.
  • the adjusting device according to FIG. 2 furthermore has a Control device 57, via electrical lines on the one hand the injector or the injector head 7 and on the other hand the Leerhubeinstellelement 55 electrically conductive with each other combines. Furthermore, between the injector 7th and the Leerhubeinstellelement 55 a voltage source and an electrical switching element, for example, a relay connected, which turn off the power supply of the feed device 51 can.
  • the fuel injector 1 is in the setting process clamped in a table 59 which holds the fuel injector 1 against the press die 53 on the injector 7th adheres to subsequently applied pressure.
  • the adjustment device and method for positioning of the actuator 19 work as follows: First the projection of Leerhubeinstellelementes 55 against the Pressing surface of the punch 53 according to the desired Idle stroke 1 micrometer accuracy.
  • the injector 7 is removed when Actuator housing 17 is clamped in the work table 59 and the upset ring 31 is inserted into the injector housing.
  • the Feed device 51 drives the punch 53 in the inner bore 25 of the injector head 7. Finally, the pressing surface touches of the punch 53 the compression ring 31. In this position however, the Leerhubeinstellelement 55 is still of the lever translator 35, for example, in the range of 1/10 mm spaced. The electrical device formed by the control device 57 Circle is still interrupted. The feed device 51 drives the punch 53 further into the inner bore 25 and deforms or upsets the compression ring 31 so far, until the Leerhubeinstellelement 55, the contact surface of the Lever translator 35 just contacted.
  • the invention is also in known fuel injectors can be used, for example, an electromagnetically operated actuator have, without Hubübersetzer, z. B. lever translator, and without servo valve directly via a transmission element, for.
  • an electromagnetically operated actuator have, without Hubübersetzer, z. B. lever translator, and without servo valve directly via a transmission element, for.
  • the Leerhub corresponds here to the difference between the deflection the actuator in its idle state and the deflection of the actuator, at which the injector starts to open.
  • the actuator of a fuel injector an actuator and a valve between which a transmission element is arranged and between which a given Idle stroke is set. It can, for example, the valve as Servo valve or designed as an injection valve and the Transmission element designed as a piston or as a lever element be.

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

Claims (6)

  1. Procédé pour positionner un mécanisme de commande (19) dans une tête d'injecteur (7) d'un injecteur de carburant (1) comportant une soupape (23), dans lequel le mécanisme de commande (19) comprend un actionneur (21) avec un boítier d'actionneur (17), et un élément de transmission (35) logé dans la tête d'injecteur (7) entre l'actionneur (21) et la soupape (23) afin de transmettre un mouvement longitudinal de l'actionneur (21) à la soupape (23),
       caractérisé en ce que l'ajustage de la position du mécanisme de commande (19) dans l'injecteur de carburant(1) lors de la déformation d'un élément d'écartement (31) est effectué par un processus de compression réalisé par le boítier d'actionneur (17) lui-même; processus dans lequel l'élément d'écartement (31) apte à être déformé plastiquement est placé dans la tête d'injecteur (7), l'élément d'écartement (31) est comprimé durablement selon la course à vide désirée de la soupape (23), et le boítier d'actionneur (17) est fixé à la tête d'injecteur (7) en contact avec l'élément d'écartement (31).
  2. Procédé selon la revendication 1, caractérisé en ce que la résistance électrique entre l'élément de transmission (35) et une plaque de fond (29) est mesurée, et que le mouvement de compression est arrêté lorsque l'élément de transmission (35) entre en contact avec la plaque de fond (29).
  3. Procédé selon la revendication 1, caractérisé en ce que l'élément d'écartement est formé par un anneau à refoulement (31).
  4. Dispositif pour positionner un mécanisme de commande (19) dans un injecteur de carburant (1) dans lequel le mécanisme de commande (19) comprend un actionneur (21) avec un boítier d'actionneur (17), et un élément de transmission (35) situé entre l'actionneur (21) et la soupape (23) afin de transmettre un mouvement longitudinal de l'actionneur (21) à la soupape (23),
       caractérisé en ce que la position du mécanisme de commande (19) dans l'injecteur de carburant lors de la déformation d'un élément d'écartement (31) au cours d'un processus de compression est ajustable par le boítier d'actionneur (17) lui-même; qu'un dispositif d'avance (51) est prévu pour presser le boítier d'actionneur (17) sur l'élément d'écartement plastiquement déformable (31) posé dans la tête d'injecteur (7), l'actionneur (21) comportant une plaque de fond (29); et qu'un dispositif de commande (57) est prévu qui arrête le mouvement du dispositif d'avance (51) dès que la plaque de fond (29) entre en contact avec l'élément de transmission (35) du mécanisme de commande (19).
  5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif de commande (57) mesure la résistance électrique entre l'élément de transmission (35) et la plaque de fond (29) et arrête le mouvement de compression du dispositif d'avance (51) dès que l'élément de transmission entre en contact avec la plaque de fond (29).
  6. Dispositif selon la revendication 4, caractérisé en ce que l'élément d'écartement (31) est réalisé par un anneau de refoulement.
EP00125706A 1999-11-23 2000-11-23 Réglage de la course entre un actionneur et un élément de transmission pour une soupape dans un injecteur de combustible Expired - Lifetime EP1103718B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19956256A DE19956256B4 (de) 1999-11-23 1999-11-23 Leerhubeinstellung zwischen einem Aktor und einem Übertragungselement eines Ventils in einem Kraftstoffinjektor
DE19956256 1999-11-23

Publications (3)

Publication Number Publication Date
EP1103718A2 EP1103718A2 (fr) 2001-05-30
EP1103718A3 EP1103718A3 (fr) 2003-04-02
EP1103718B1 true EP1103718B1 (fr) 2005-05-04

Family

ID=7929995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00125706A Expired - Lifetime EP1103718B1 (fr) 1999-11-23 2000-11-23 Réglage de la course entre un actionneur et un élément de transmission pour une soupape dans un injecteur de combustible

Country Status (2)

Country Link
EP (1) EP1103718B1 (fr)
DE (2) DE19956256B4 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10133218C2 (de) * 2001-07-09 2003-07-03 Bosch Gmbh Robert Verfahren und Vorrichtung zur Einstellung des Magnethubes an Kraftstoffinjektoren
DE10153630A1 (de) * 2001-10-31 2003-07-10 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10304458A1 (de) * 2003-02-04 2004-08-19 Siemens Ag Verfahren zum exakten Positionieren eines Bauteils in einer Stufenbohrung eines Gehäuses sowie Injektor für die Kraftstoffeinspritzung
DE10338282A1 (de) * 2003-08-20 2005-03-31 Siemens Ag Verfahren und Vorrichtung zum Positionieren eines piezoelektrischen Aktors
DE102004042352B4 (de) 2004-08-20 2007-08-09 Siemens Ag Kraftstoffinjektor für eine Brennkraftmaschine
DE102004058715B4 (de) * 2004-12-06 2010-08-12 Continental Automotive Gmbh Kraftstoffinjektor für eine Brennkraftmaschine sowie Verfahren zur Herstellung eines Kraftstoffinjektors
DE102005001005B4 (de) 2005-01-07 2008-11-20 Continental Automotive Gmbh Stellantrieb zur Betätigung eines Kraftstoffeinspritzventils
DE102005015409B4 (de) 2005-04-04 2019-01-03 Continental Automotive Gmbh Verfahren und Vorrichtung zur Vorgabe eines Abstands zwischen einem vorgegebenen ersten Bezugspunkt auf einem ersten Körper und einem vorgegebenen zweiten Bezugspunkt auf einem zweiten Körper und Körpervorrichtung
DE102005034689B4 (de) 2005-07-25 2007-07-05 Siemens Ag Abdichtungsanordnung eines Piezoaktors in einem Kraftstoffinjektor
DE102006029966B4 (de) 2006-06-29 2010-04-22 Continental Automotive Gmbh Abdichtungsanordnung eines Piezoaktors für ein Kraftstoffeinspritzventil einer Brennkraftmaschine
DE102010044285B4 (de) * 2010-09-03 2014-02-27 Continental Automotive Gmbh Verfahren und Vorrichtung zum Einstellen eines Leerhubs eines Stellantriebs eines Einspritzventils und Injektorbaugruppe
DE102016216885A1 (de) * 2016-09-06 2018-03-08 Continental Automotive Gmbh Fluidinjektor für ein Kraftfahrzeug
DE102019217970A1 (de) * 2019-11-21 2021-05-27 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531153A1 (de) * 1985-06-14 1986-12-18 Pierburg Gmbh & Co Kg, 4040 Neuss Elektromagnetisches, intermittierendes einspritzventil
DE4211723A1 (de) * 1992-04-08 1993-04-15 Bosch Gmbh Robert Verfahren zur herstellung und verfahren zur einstellung eines ventils
WO1995030830A1 (fr) * 1994-05-10 1995-11-16 Robert Bosch Gmbh Dispositif et procede de reglage d'une course de soupape
DE19512338A1 (de) * 1994-05-10 1995-11-16 Bosch Gmbh Robert Vorrichtung und Verfahren zum Einstellen eines Ventilhubs
DE4431128A1 (de) * 1994-09-01 1996-03-07 Bosch Gmbh Robert Verfahren zur Einstellung eines Ventils und Ventil
JPH08189439A (ja) * 1994-12-28 1996-07-23 Zexel Corp 電磁式燃料噴射弁およびそのノズルアッシィ組付け方法
WO1996041947A1 (fr) * 1995-06-08 1996-12-27 Siemens Automotive Corporation Procede d'ajustage d'un entrefer d'un electro-aimant
DE19902807C1 (de) * 1999-01-25 2000-06-08 Siemens Ag Leerhubeinstellung zwischen einem Aktor und einem vom Aktor betätigten Servoventil in einem Kraftstoffinjektor
DE19921242C1 (de) * 1999-05-07 2000-10-26 Siemens Ag Verfahren zum Positionieren des Stellantriebs in einem Kraftstoffinjektor und Vorrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
DE19956256B4 (de) 2004-04-08
DE19956256A1 (de) 2001-06-07
EP1103718A2 (fr) 2001-05-30
EP1103718A3 (fr) 2003-04-02
DE50010220D1 (de) 2005-06-09

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