EP2064437B1 - Injecteur d'injection de carburant - Google Patents

Injecteur d'injection de carburant Download PDF

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Publication number
EP2064437B1
EP2064437B1 EP07787285A EP07787285A EP2064437B1 EP 2064437 B1 EP2064437 B1 EP 2064437B1 EP 07787285 A EP07787285 A EP 07787285A EP 07787285 A EP07787285 A EP 07787285A EP 2064437 B1 EP2064437 B1 EP 2064437B1
Authority
EP
European Patent Office
Prior art keywords
armature
sleeve
control valve
anchor
spring 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.)
Not-in-force
Application number
EP07787285A
Other languages
German (de)
English (en)
Other versions
EP2064437A1 (fr
Inventor
Thomas Sebastian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2064437A1 publication Critical patent/EP2064437A1/fr
Application granted granted Critical
Publication of EP2064437B1 publication Critical patent/EP2064437B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M63/0024—Valves characterised by the valve actuating means electrical, e.g. using solenoid in combination with permanent magnet
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine according to the preamble of claim 1.
  • injection systems For introducing fuel into combustion chambers of internal combustion engines often injection systems are used. These generally comprise, for each combustion chamber, an injector via which fuel is injected under high pressure into the combustion chamber.
  • the injector generally comprises an injection valve member which releases or closes at least one injection opening.
  • the injection valve member is generally controlled via a control valve.
  • the control valve may be magnetically actuated or driven by a piezoelectric actuator.
  • Magnetically operated control valves generally include a solenoid accommodated in a magnetic core and an armature movably mounted on an armature bolt to minimize the influence of the armature vibrations.
  • the anchor is placed by means of a spring element in the direction of the coil against a stop.
  • the anchor bolt is connected to a closing element which is placed in a seat for closing the control valve.
  • the force required for this purpose is applied via a spring element on the anchor bolt.
  • the coil is energized, so that forms a magnetic field and attracts the anchor.
  • the anchor must overcome the restoring force of the spring element, with the anchor bolt is placed with the closing element in his seat.
  • the anchor is usually designed as a flat armature, whereby the magnetic circuit with larger the residual air gap and stroke loses power.
  • the dynamics of the magnetic actuator comprising the solenoid and the armature are limited.
  • a fuel injector with a solenoid-operated control valve that controls an injection valve member for injecting fuel into the combustion chamber of an internal combustion engine is off DE 197 08 104 A1 known.
  • the control valve comprises an armature having a central bore, with which the armature is movably guided on an anchor bolt.
  • the armature is moved between the open position and the closed position of the control valve on the anchor bolt, wherein the anchor bolt is guided in a housing-fixed sleeve.
  • a lower stop limits only a compensating movement of the armature when closing the control valve, so that the armature is in its initial position with the control valve closed again in a formed on the anchor bolt upper stop.
  • the armature acts directly on the upper stop fixed on the anchor bolt.
  • Another solenoid-operated control valve for a fuel injector goes out WO 02/092991 A1 out.
  • the armature is guided axially on the anchor bolt between a stop fixed to the anchor bolt and an overstroke stop.
  • the overstroke stop represents a momentary stop position during the closing process, wherein the stationary stop coincides in the closed position with the upper stop on the anchor bolt.
  • An inventively designed injector for injecting fuel into a combustion chamber of an internal combustion engine comprises an injection valve member which releases or closes at least one opening.
  • the injection valve member is driven by a solenoid-operated control valve.
  • the solenoid operated control valve includes an armature having a central bore in which an anchor bolt is movably received, the armature being movable between upper and lower stops on the anchor bolt. According to the invention, the armature is held by the spring force of a spring element against its lower stop when the control valve is closed.
  • the anchor is dazn connected to an anchor sleeve on which a collar is formed, against which the spring element, with which the armature is held at its lower stop, is set.
  • An advantage of the anchor sleeve is that the control valve designed according to the invention can be used without much effort in a known from the prior art fuel injector, wherein the armature is set with the control valve closed at its upper stop.
  • the anchor sleeve is connected to the armature, for example non-positively or positively or may also be integrally formed with the armature.
  • the anchor bolt preferably comprises a shoulder, wherein the spring element, with which the armature is held against its lower stop, placed with one side against the shoulder and the other side against the collar on the anchor sleeve is.
  • the spring element is preferably designed as a compression spring coil spring.
  • a sleeve-shaped extension is preferably formed on the armature, in which the anchor bolt is guided.
  • a circumferentially extending rib is formed on the sleeve-shaped extension, with which the anchor sleeve is connected.
  • the anchor bolt is guided in a sleeve which is fixed with a flange-shaped extension in the injector housing.
  • the flange-shaped extension is placed against an adjusting ring and fixed with a threaded sleeve.
  • the adjusting ring rests on a valve piece which is accommodated in the injector housing and bears against a shoulder in the injector housing.
  • the flange-shaped extension e.g. rests directly on a shoulder on the injector housing or that the shim, against which the flange-shaped extension is placed, rests on the shoulder on the injector housing. Any further, known in the art way to fix the sleeve on the injector, is possible.
  • the upper stop is e.g. formed by a ring which is received in a groove in the anchor bolt.
  • the material of the ring is preferably chosen so that the ring is not deformed by the anchor abutting it. Suitable material for the ring is e.g. stainless steel, preferably 1.4305 steel.
  • the anchor is preferably made of 100Cr6 steel.
  • the anchor bolt is preferably made of one of the steels 1.4305 or 100Cr6.
  • Another advantage of the inventively embodied fuel injector is that the dynamics of the magnetic actuator can be kept constant with reduced output power.
  • fuel injectors such as those used in high-pressure storage injection systems, current-controlled output stages are used.
  • the control is carried out in a boost phase and a holding phase.
  • the boost phase ensures a quick opening of the anchor bolt and requires a lot of energy.
  • the inventive Fuel injector allows same opening times with lower boost voltage and thus leads to cost savings on the power amplifier.
  • the single FIGURE shows an inventively designed control valve of a fuel injector.
  • an injection valve member 1 which releases or closes at least one injection port not shown here, is controlled via a control valve 3.
  • the control valve 3 is a compound of a control chamber 5, which is bounded by an end face 7 of the injection valve member 1, in a valve chamber 9 which is connected to a fuel return 10, free or closes them.
  • a closing element 11 is placed in a seat 13 or lifted from this, to close a channel 15 through which the control chamber 5 is connected to the valve chamber 9. In the channel 15, a throttle element 17 is received.
  • control piston is either directly connected to the injection valve member or the control piston serves as a booster piston, wherein the control piston and the injection valve each with an end face define a booster chamber and is increased by a movement of the control piston in the booster chamber, the pressure in the booster chamber, whereby a increased pressure acts on the injection valve member and the injection valve member is placed in its seat to close the at least one injection port.
  • the control piston is lifted out of the control chamber, the volume in the booster chamber increases, so that the pressure in it decreases and a lower pressure acts on the injection valve member.
  • the injection valve member is out of its seat lifted and releases the at least one injection port for injecting fuel into the combustion chamber of the internal combustion engine.
  • the closing element 11 is placed in its seat 13 by means of an anchor bolt 19.
  • the force required for this purpose is applied by a spring element 21 on the anchor bolt 19.
  • the spring element 21 is preferably designed as a compression spring coil spring. With one side, the spring element 21 acts on a shoulder 23 on the anchor bolt 19. With the other side, the spring element 21 acts against a housing cover 25. In order to adjust the required spring force of the spring element 21, a shim 27 is received between the housing cover 25 and the spring element 21 , Due to the thickness of the dial 27, the bias of the spring element 21 is adjusted. So that the spring element 21 does not slip on the anchor bolt 19, a pin 29 is formed on the anchor bolt 19, which is enclosed by the spring element 21.
  • the spring element 21 is surrounded by a magnetic core 31, in which a coil 33 is accommodated for generating a magnetic field.
  • a coil 33 By the magnetic field generated by the coil 33, an anchor plate 35 of an armature 37 is attracted.
  • the armature 37 further comprises a sleeve-shaped extension 39, which is connected to the anchor plate 35.
  • the sleeve-shaped extension 39 and the anchor plate 35 passes through a central bore 41, in which the anchor bolt 19 is guided.
  • the diameter of the central bore 41 in the armature 37 is chosen so that the armature 37 is movable on the anchor bolt 19 without much effort. At the same time, the diameter of the central bore 41 must not be so great that the armature 37 can tilt on the anchor bolt 19.
  • the anchor bolt 19 is guided in a sleeve 42 which is fixed with a flange-shaped extension 43 on the injector 44.
  • the flange-shaped extension is provided against an adjusting ring 45 which rests on a valve member 46 on the injector 44.
  • the valve piece rests on a shoulder 48 on the injector housing 44.
  • the valve member 46, the dial 45 and the flange-shaped extension 43 formed on the sleeve 42 are fixed with a threaded sleeve 50 in the injector housing.
  • the sleeve 42 can also be fixed in the injector housing 44 in any other manner known to those skilled in the art.
  • the flange-shaped extension 43 or the adjusting ring 45 rest on a shoulder on the injector housing 44, or that an external thread is provided on the flange-shaped enlargement 43 and the sleeve 42 is screwed into the injector housing 44 with the flange-shaped enlargement.
  • the lower stop 47 By the lower stop 47, the movement of the armature 37 is stopped on the anchor bolt 19.
  • an upper stop 49 is formed on the armature plate 35 facing side of the anchor bolt 19, an upper stop 49 is formed.
  • the upper stop 49 is an armature plate 35 facing end face of a ring member 51 which is received in a groove 53 in the anchor bolt 19.
  • the armature 37 is movable between the upper stopper 49 and the lower stopper 47.
  • a circumferentially extending rib 55 is formed on the sleeve-shaped extension 39 of the armature 37.
  • An anchor sleeve 57 is connected to the circumferentially extending rib 55.
  • the connection of the rib 55 with the anchor sleeve 57 can be done non-positively or positively.
  • the armature 37 and the anchor sleeve 57 are integrally formed.
  • the attachment of the anchor sleeve 57 to the rib 55 may e.g. by welding, soldering or gluing.
  • the anchor sleeve 57 is screwed onto the rib 55. Any other, known to those skilled fastening is possible. Thus, e.g. An attachment with screws or rivets may be possible.
  • a collar 59 is formed at the anchor sleeve 57.
  • the federal government 59 points inwards.
  • a spring element 61 is supported, which encloses the sleeve 42 and on the other hand supported on a shoulder 63 which is formed on the sleeve 42.
  • the shoulder 63 is formed on the armature 37 facing the side of the sleeve 42.
  • the spring element 61 is thus positioned between the sleeve 42 and the anchor sleeve 57.
  • the spring element 61 is preferably designed as a compression spring coil spring.
  • e.g. designed as a compression spring spring element acts on the anchor plate 35.
  • the spring element surrounds the anchor bolt 19 and the spring element 21, which acts on the anchor bolt 19.
  • the spring element acting on the anchor plate 35 is then against one side against the anchor plate 35 and on the other side e.g. placed against the housing cover 25.
  • the closing element 11 which is spherical in this case, is in its seat 13.
  • the channel 15 is closed.
  • the control chamber 5 is connected via a throttle element 65 with a fuel inlet, located in the control chamber 5 under system pressure standing fuel.
  • the pressure force of under system pressure standing fuel acts on the end face 7 of the injection valve member 1 and puts this in his seat.
  • the at least one injection port is closed. So that the closing element 11 is not lifted out of its seat 13 by the pressure force of the fuel under system pressure, it is necessary for the closing element 11 to be placed in its seat 13 with a sufficiently large force. This force is applied by the spring element 21 on the anchor bolt 19, with which the closing element 11 is placed in its seat 13.
  • the armature 27 is placed by the spring element 61 at its lower stop 47.
  • the coil 33 is energized. It forms a magnetic field.
  • the armature 37 is first accelerated along the anchor bolt 19 in the direction of the upper stop 49.
  • the armature 37 abuts the upper stop 49, whereby a pulse on the upper stop 49 and thus the anchor bolt 19 acts.
  • the anchor bolt 19 is accelerated against the spring force of the spring element 21.
  • the armature plate 35 acts on the armature plate 35, the now fully formed magnetic field of the coil 33.
  • the armature 37 is further moved in the direction of the coil 33.

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)

Claims (6)

  1. Injecteur pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne, comprenant un organe de soupape d'injection (1) qui ouvre ou ferme au moins une ouverture d'injection, l'organe de soupape d'injection (1) étant commandé par une soupape de commande à commande magnétique (3) et la soupape de commande à commande magnétique (3) comprenant une armature (37) qui présente un alésage central (41) dans lequel est reçu de manière déplaçable un boulon d'armature (19), le boulon d'armature (19) positionnant dans son siège (13) au moyen de la force d'un élément de ressort (21) un élément de fermeture (11), l'armature (37) pouvant se déplacer entre une butée supérieure (49) et une butée inférieure (47) sur le boulon d'armature (19), le boulon d'armature (19) étant guidé dans une douille (42), et l'armature (37), lorsque la soupape de commande (3) est ouverte, étant positionnée contre sa butée supérieure (49) sur le boulon d'armature (19), caractérisé en ce que l'armature (37) est connectée à une douille d'armature (57) sur laquelle est réalisé un épaulement (59), contre lequel est positionné un élément de ressort (61), et en ce que l'armature (37), lorsque la soupape de commande (3) est fermée, est tirée contre la douille (42) par la force de ressort de l'élément de ressort (61) et est donc maintenue contre sa butée inférieure (47), qui est réalisée sur la douille (42).
  2. Injecteur selon la revendication 1, caractérisé en ce que la douille d'armature (57) est connectée à l'armature (37) par engagement par force ou par coopération de forme, ou est réalisée d'une seule pièce avec l'armature (37).
  3. Injecteur selon la revendication 2, caractérisé en ce que la douille (42) comprend un épaulement (63) et l'élément de ressort (61) est positionné avec un côté contre l'épaulement (63) et avec l'autre côté contre l'épaulement (59) sur la douille d'armature (57).
  4. Injecteur selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une saillie (39) en forme de douille est réalisée sur l'armature (37), dans laquelle est guidé le boulon d'armature (19).
  5. Injecteur selon la revendication 4, caractérisé en ce qu'une nervure (55) s'étendant dans la direction périphérique, avec laquelle est connectée la douille d'armature (57), est réalisée sur la saillie (39) en forme de douille de l'armature (37).
  6. Injecteur selon la revendication 1, caractérisé en ce que la butée supérieure (49) est formée par un élément annulaire (51) qui est reçu dans une rainure (53) dans le boulon d'armature (19).
EP07787285A 2006-09-07 2007-07-10 Injecteur d'injection de carburant Not-in-force EP2064437B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006041977A DE102006041977A1 (de) 2006-09-07 2006-09-07 Injektor zum Einspritzen von Kraftstoff
PCT/EP2007/057009 WO2008028704A1 (fr) 2006-09-07 2007-07-10 injecteur d'injection de carburant

Publications (2)

Publication Number Publication Date
EP2064437A1 EP2064437A1 (fr) 2009-06-03
EP2064437B1 true EP2064437B1 (fr) 2011-01-26

Family

ID=38627034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787285A Not-in-force EP2064437B1 (fr) 2006-09-07 2007-07-10 Injecteur d'injection de carburant

Country Status (5)

Country Link
EP (1) EP2064437B1 (fr)
CN (1) CN101512140A (fr)
AT (1) ATE497098T1 (fr)
DE (2) DE102006041977A1 (fr)
WO (1) WO2008028704A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015222091A1 (de) * 2015-11-10 2017-05-11 Robert Bosch Gmbh Elektromagnetisch ansteuerbares Saugventil für eine Hochdruckpumpe, Hochdruckpumpe
CN106762302A (zh) * 2015-11-19 2017-05-31 联合汽车电子有限公司 喷油器的阀针组件及衔铁
DE102016218515A1 (de) * 2016-09-27 2018-03-29 Robert Bosch Gmbh Verfahren zur Steuerung von schaltbaren Ventilen, insbesondere von Einspritzventilen einer Brennkraftmaschine eines Kraftfahrzeugs
EP3470664A1 (fr) * 2017-10-13 2019-04-17 Continental Automotive GmbH Ensemble rampe de carburant destiné à un système d'injection de carburant et procédé de fabrication d'un tel ensemble rampe de carburant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708104A1 (de) 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil
DE10123171A1 (de) 2001-05-12 2002-11-14 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE10131125A1 (de) 2001-06-28 2002-09-12 Bosch Gmbh Robert Magnetventil mit gedämpftem, einteiligem Ankerelement
DE10232718A1 (de) 2002-07-18 2004-02-05 Robert Bosch Gmbh Ankerbaugruppe für Kraftstoffinjektoren

Also Published As

Publication number Publication date
DE502007006384D1 (de) 2011-03-10
DE102006041977A1 (de) 2008-03-27
EP2064437A1 (fr) 2009-06-03
ATE497098T1 (de) 2011-02-15
CN101512140A (zh) 2009-08-19
WO2008028704A1 (fr) 2008-03-13

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