EP1103718A2 - 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

Info

Publication number
EP1103718A2
EP1103718A2 EP00125706A EP00125706A EP1103718A2 EP 1103718 A2 EP1103718 A2 EP 1103718A2 EP 00125706 A EP00125706 A EP 00125706A EP 00125706 A EP00125706 A EP 00125706A EP 1103718 A2 EP1103718 A2 EP 1103718A2
Authority
EP
European Patent Office
Prior art keywords
actuator
valve
housing
fuel injector
idle stroke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00125706A
Other languages
German (de)
English (en)
Other versions
EP1103718B1 (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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp 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, a device to carry out such a method and a fuel injector with an actuator.
  • This accumulator injection system uses fuel conveyed into a high-pressure accumulator by means of a high-pressure pump, from which the fuel with the help of fuel injectors is injected into internal combustion engines.
  • the Fuel injector has an injection valve, which by a Servo valve is opened and closed to the temporal Determine the course of the injection process in the combustion chamber.
  • the servo valve is controlled by an electrically controlled one Actuator, in particular actuated by a piezo actuator. In such a piezo actuator, by applying electrical voltage caused a longitudinal expansion. This is transferred to the servo valve, which in turn is the injection valve controls. This means the longitudinal expansion in the um range of the piezo actuator operate the servo valve appropriately can, this longitudinal expansion z.
  • B. mechanically by an im Fuel stored lever translator or hydraulically strengthened a pressure room.
  • This idle stroke setting is in accordance with the prior art previously made so that the exact arrangement of each Components of the fuel injector, in particular their Distances to each other, calculated from the dimensions of these Components are determined. Each component must do this can be measured individually. After measuring, the idle stroke then through between the injector housing and the actuator housing arranged shims, the minimal Tolerances are allowed and therefore too expensive are finished. To check the idle stroke set in this way, it is necessary to assemble the fuel injector and to test under operating conditions. In case of malfunction must be determined, the fuel injector after the Test run can be disassembled again. Then the shims possibly reworked or exchanged become.
  • the object of the present invention is a simple method for precise positioning of an actuator in one Fuel injector, a device for carrying out a such a method and such a fuel injector to provide.
  • 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 the Injector housing already when the spacer element is deformed made by the pressing process with the actuator housing itself can be.
  • the actuator housing As a press stamp To be able to do so, however, it is necessary to use a suitably hard one Use material for the actuator housing. Doing so the actuator is controlled according to the desired idle stroke and the actuator housing with the according to the control slightly extended actuator pressed onto the spacer.
  • the Actuator or actuator housing a press stamp the spacer according to the desired idle stroke of the valve.
  • the press ram is designed such that when reaching the desired idle stroke setting just touches or actuates the transmission element, whereby the pressing or positioning process ends with micrometer precision becomes.
  • a fuel injector 1 according to FIG. 1 essentially exists from an injection valve 3, an injection nozzle 5, a actuator 19 contained in an injector head 7 (FIG 3) and an actuator connection 9.
  • an actuator housing 17 is exact by means of a hollow screw 15 fixed and in particular in the actuator longitudinal direction immovable attached.
  • the actuator 19 in the injector head 7 consists according to FIG. 3 essentially from one arranged in the actuator housing 17 Piezo actuator 21 and a servo valve 23, which are in one stage trained inner bore 25 mounted in the injector head 7 are.
  • the piezo actuator 21 sits in a manner known per se Way from several stacked piezo elements together in the actuator housing 17 between a head plate 27 and a base plate 29, the valve side has circular attachment, are biased.
  • the Position of the base plate attachment for example, that its end face is exactly flush with the valve side End face of the actuator housing 17 when the actuator is not activated completes.
  • the piezo actuator 21 continues to conduct protruding from the head plate 27 pins with the Actuator connection 9 connected so that the actuator connection 9 Voltage is applied to the piezo actuator 21 and thus its expansion controlled can be caused.
  • the piezo actuator 21 is at the upper end of the stepped inner bore 25 attached in the injector head 7.
  • the actuator housing 17 with its valve-side end face on itself known metallic, plastically suitably shaped compression ring 31 pressed.
  • the compression ring 31 lies on a ring revolving washer 33. This in turn is on a Heel arranged in the inner bore 25 of the injector head 7.
  • the actuator housing 17 is by means of the banjo bolt 15 pressed firmly against the compression ring 31 and in this position held precisely on the injector head. You can do this the banjo bolt 15 and the injector housing 17 corresponding Have paragraphs or other suitable training his.
  • the longitudinal expansion of the piezo actuator caused by electrostriction 21 or the movement of the base plate 29 in the longitudinal direction of the actuator is designed by a lever translator 35 Transfer element to the servo valve 23 and amplified about a factor of 1.5.
  • the working stroke is typically around 40 ⁇ m.
  • the lever translator 35 is between the circular attachment on the base plate 29 of the piezo actuator 21 and a valve piston 37 of the servo valve 23 arranged and with one leg on one in the Inner bore 25 of the injector head 7 below the guide disc 39 arranged washer 33 supported immovably.
  • the lever translator 35 through the washer 33 and the valve piston 37 through the Guide disk 39 guided or positioned relative to each other.
  • the valve piston 37 is still on a valve mushroom 41 on the at rest on a valve spring 43 a valve seat 45 in the inner bore 25 of the injector head 7 is pressed.
  • the base plate attachment presses 29 against the contact area of the lever translator 35, whereby this is supported on the guide disk 39 turns.
  • the valve piston 37 resting on the lever translator 35 is lower pushed into the inner bore 25 of the injector head 7.
  • the against the valve piston 37 valve mushroom 41 is against Holding force of the valve spring 43 is lifted from its valve seat 45 and so the injector controlled by the servo valve 23 5 open.
  • the Piezo actuator 21 or the floor slab attachment 29 again from the Inner bore 25 of the injector head 7 back until it is in its Rest position, for example, again exactly flush with the end face of the actuator housing 17 at a distance from the lever translator stands.
  • the valve mushroom 41 is actuated by the valve spring 43 pressed on the valve seat 45 and thus the controlled Injector 5 closed again.
  • the adjusting device has a known one Feed device 51 on the vertical movement of a press ram 53 in the arrow direction according to FIG. 2 with micrometer accuracy controls.
  • the press ram 53 has a shoulder shape idle stroke setting element protruding from the stamp press surface 55 on. This is made of an electrically conductive Material designed and electrically insulated from Press stamp 53 fastened in this.
  • the protrusion of the idle stroke adjustment element 55 corresponds to the desired one Idle stroke 1 of the valve to be set, with the exact one Position of the operating surface of the base plate attachment 29 ( Figure 3) relative to the valve-side support surface of the actuator housing must be taken into account when the actuator is idle.
  • the adjusting device according to FIG. 2 also has one Control device 57 on the one hand via electrical lines the injector or the injector head 7 and on the other hand the idle stroke setting element 55 is electrically conductive with one another connects. Furthermore, between the injector head 7 and the idle stroke setting member 55 is a voltage source and an electrical switching element, for example a relay switched, which switch off the power supply of the feed device 51 can.
  • the fuel injector 1 is in the setting process clamped in a table 59 of the fuel injector 1 against that of the punch 53 on the injector head 7 subsequently applies pressure.
  • the adjustment device and the method for positioning of the actuator 19 function as follows: First, the projection of the idle stroke setting element 55 compared to the Press surface of the punch 53 corresponding to the desired one Idle stroke 1 set with micrometer accuracy.
  • the injector head 7 is removed Actuator housing 17 clamped in the work table 59 and the compression ring 31 inserted into the injector housing.
  • the Feed device 51 moves the punch 53 into 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 idle stroke setting element 55 is still from the lever translator 35 spaced for example in the range of 1/10 mm. The electrical formed by the control device 57 So the circle is still broken. The feed device 51 moves the punch 53 further into the inner bore 25 and deforms or upsets the compression ring 31 so until the idle stroke setting element 55 touches the surface of the Lever translator 35 just contacted. At that moment or the position from the idle stroke adjustment element is exactly in this position 55, the lever translator 35, the washer 33 or the guide disk 39, the injector head 7 and the corresponding Lines of the control device 57 formed electrical Circle closed.
  • the relay therefore interrupts the Power supply to the feed device 51 and thereby stops the movement of the ram 53 micrometer. Subsequently the stamp 53 is removed from the injector head 7 emotional. This state is shown in Figure 2. After that the fuel injector 1 is completely assembled, as in Figures 1 and 3 shown.
  • the invention is also in known fuel injectors can be used, for example, an electromagnetically operated actuator have the without stroke translator, for. B. lever translator, and without servo valve directly via a transmission element, e.g. B. a piston is connected to the nozzle needle.
  • the Idle stroke corresponds to the difference between the deflections the actuator in its idle state and the deflection of the actuator, at which the injector is just starting to open.
  • the actuator of a fuel injector an actuator and a valve between which a transmission element is arranged and between which a predetermined Idle stroke is set.
  • the valve can be used as Servo valve or designed as an injection valve and that Transmission element designed as a piston or lever element his.

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  • 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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
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
DE19956256 1999-11-23
DE19956256A DE19956256B4 (de) 1999-11-23 1999-11-23 Leerhubeinstellung zwischen einem Aktor und einem Übertragungselement eines Ventils in einem Kraftstoffinjektor

Publications (3)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2827014A1 (fr) * 2001-07-09 2003-01-10 Bosch Gmbh Robert Procede et dispositif de reglage de la course de l'electroaimant d'un injecteur de carburant
EP1508690A1 (fr) * 2003-08-20 2005-02-23 Siemens Aktiengesellschaft Procédé et installation pour positionner un actionneur piezoélectrique
WO2012028464A1 (fr) * 2010-09-03 2012-03-08 Continental Automotive Gmbh Procédé et dispositif pour ajuster une course à vide d'un entraînement de commande d'une soupape d'injection et module d'injecteur
WO2018046204A1 (fr) * 2016-09-06 2018-03-15 Continental Automotive Gmbh Injecteur de fluide pour un véhicule automobile

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
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
US5787583A (en) * 1994-05-10 1998-08-04 Robert Bosch Gmbh Apparatus and method for setting a valve lift
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2827014A1 (fr) * 2001-07-09 2003-01-10 Bosch Gmbh Robert Procede et dispositif de reglage de la course de l'electroaimant d'un injecteur de carburant
EP1508690A1 (fr) * 2003-08-20 2005-02-23 Siemens Aktiengesellschaft Procédé et installation pour positionner un actionneur piezoélectrique
WO2012028464A1 (fr) * 2010-09-03 2012-03-08 Continental Automotive Gmbh Procédé et dispositif pour ajuster une course à vide d'un entraînement de commande d'une soupape d'injection et module d'injecteur
US9371807B2 (en) 2010-09-03 2016-06-21 Continental Automotive Gmbh Method and device for setting an idle stroke of an actuating drive of an injection valve, and injector assembly
WO2018046204A1 (fr) * 2016-09-06 2018-03-15 Continental Automotive Gmbh Injecteur de fluide pour un véhicule automobile

Also Published As

Publication number Publication date
EP1103718B1 (fr) 2005-05-04
EP1103718A3 (fr) 2003-04-02
DE19956256A1 (de) 2001-06-07
DE50010220D1 (de) 2005-06-09
DE19956256B4 (de) 2004-04-08

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