WO2008083882A1 - Injecteur pour l'injection de carburant - Google Patents

Injecteur pour l'injection de carburant Download PDF

Info

Publication number
WO2008083882A1
WO2008083882A1 PCT/EP2007/063408 EP2007063408W WO2008083882A1 WO 2008083882 A1 WO2008083882 A1 WO 2008083882A1 EP 2007063408 W EP2007063408 W EP 2007063408W WO 2008083882 A1 WO2008083882 A1 WO 2008083882A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring element
armature
anchor
injector
injector according
Prior art date
Application number
PCT/EP2007/063408
Other languages
German (de)
English (en)
Inventor
Heike Bauer
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 WO2008083882A1 publication Critical patent/WO2008083882A1/fr

Links

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
    • 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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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

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.
  • high-pressure accumulator injection systems for introducing fuel into direct-injection, self-igniting internal combustion engines, for example, high-pressure accumulator injection systems (common rail systems) are used.
  • high pressure fuel is injected into the combustion chambers of the internal combustion engine by means of fuel injectors.
  • the injectors are usually controlled via a control valve. It is known to control the control valve by means of a magnetic actuator or a piezoelectric actuator.
  • Magnetically controlled injectors usually comprise an armature in which an anchor bolt is guided. With the anchor bolt a closing element of the control valve is connected. The anchor bolt is guided in a hole in the anchor. In order to close the control valve, a spring force of a spring element acts on the anchor bolt. To open the control valve, the armature is attracted to the electromagnet by applying a voltage to the electromagnet and the resulting magnetic field. Here, the anchor strikes against a contact surface on the anchor bolt and lifts it with. As a result, the closing element is lifted from its seat.
  • Such an injector is shown for example in C. Stan, direct injection systems for gasoline and diesel engines, Springer-Verlag, Berlin, Heidelberg, 1999, pages 166, 167.
  • An inventively designed injector for injecting fuel into a combustion chamber of an internal combustion engine comprises an injection valve member, which at least opens or closes an injection opening.
  • the injection valve member is driven by a solenoid-operated control valve, the solenoid-operated control valve comprising an armature with an armature plate which cooperates with a coil comprising a solenoid.
  • a spring element is guided in such a way that the armature plate is pushed away when not energized coil by the spring force of the spring element of the coil.
  • the spring element By guiding the spring element on the anchor plate, a more defined spring guidance can be achieved than is the case with the injectors known from the prior art. Unlike the known injectors, the spring element does not act on the anchor bolt, but directly on the anchor plate. Another advantage of the solution according to the invention is that the number of components and thus the cost of the injector can be reduced. The assembly is simplified because it is no longer necessary to pass the anchor bolt through a hole in the anchor and secured with a locking ring. Usually, in the injectors known from the prior art, the anchor bolt and the securing ring are enclosed by a sleeve. This is also omitted in the inventive solution.
  • a cylindrical extension is formed on the anchor plate for guiding the spring element, which extension is enclosed by the spring element.
  • the spring element is in this case usually designed as a compression spring coil spring.
  • the anchor plate and the guide for the spring element are preferably formed in one piece. Alternatively, however, it is also possible that the anchor plate and the guide for the spring element are formed in two pieces.
  • the anchor plate and the guide are preferably non-positively or positively connected.
  • the anchor plate and the guide can be screwed together or welded together.
  • a sleeve-shaped depression is formed on the armature, in which an anchor bolt is received and guided.
  • the anchor bolt acts with a closing element together, which is adjustable in a seat and by which a connection can be released from a control room in a fuel return or closed.
  • the closing element and the seat can assume any geometry known to those skilled in the art.
  • the closing element is designed spherical and the valve seat in the form of a conical seat.
  • the anchor bolt is preferably guided in an anchor sleeve, which is fixed in the housing of the injector.
  • an annular extension is formed on the anchor sleeve, which rests with a lower end face on a shim, while on an upper end surface of the annular extension acts a threaded ring which is screwed into the upper housing portion of the injector and the annular extension against the shim suppressed.
  • the shim in turn rests on a valve piece which rests on a step in the upper housing section. The shim compensates production inaccuracies.
  • an extension is formed on the anchor bolt between the closing element and the anchor sleeve, which abuts against the anchor sleeve for limiting the stroke.
  • the single FIGURE shows a control valve designed according to the invention
  • FIGURE shows an inventively designed control valve of a fuel injector.
  • An injector 1 comprises an upper housing section 3, in which a control valve 5 is received.
  • the control valve 5 is a 2/2-way valve.
  • control valve 5 is actuated by a magnetic actuator 7.
  • the magnetic actuator 7 comprises a coil 9 which is accommodated in a core 11.
  • the magnetic actuator 7 acts on an armature 13 with anchor plate 15th
  • a sleeve-shaped recess 17 is formed in the armature 13.
  • an anchor bolt 19 is guided in the sleeve-shaped recess 17, an anchor bolt 19 is guided.
  • a holding body 23 With an armature 13 remote from the lower end face 21 of the anchor bolt 19 acts on a holding body 23 in which a closing element 25 is received.
  • the closing element 25 is designed spherical.
  • the closing element 25 is formed in any other geometry known to those skilled in the art.
  • the closing element 25 may also be cone-shaped. It is also possible that the closing element 25 is designed as a flat seat.
  • the anchor bolt 19 is guided in an anchor sleeve 27.
  • the anchor sleeve 27 has an annular extension 29, with which this is fixed to the upper housing portion 3 of the injector 1.
  • the annular extension 29 is located with a lower end face 31 on a dial 33, while on an upper end face 35 of the annular extension 29, a threaded ring 37 acts, which is screwed into the upper housing portion 3 of the injector 1 and the annular extension 29 against the Shim 33 presses.
  • the shim 33 rests on a valve piece 39, which in turn rests on a step 41 in the upper housing section 3.
  • a control chamber 43 is formed between the anchor bolt 19 and the anchor plate 15 in the armature 13.
  • the control chamber 43 is usually filled with fuel.
  • a first spring element 45 acts on the anchor plate.
  • the first spring element 45 is preferably a compression spring designed as a spiral spring. With a first side, the first spring element 45 acts on the anchor plate 15. With a second side, the spring element 45 is placed against the housing. In the embodiment shown here, this is a housing cover 47. To adjust the spring force of the spring element 45 is between the Spring element 45 and the housing cover 47, a setting ring 49 was added. The spring element 45 is enclosed by the core 11 of the magnetic actuator 7.
  • a groove 51 is formed in the anchor plate 15.
  • the spring element 45 is positioned in the groove 51 so that it can not slip on the anchor plate 15.
  • the first spring element 45 further encloses a cylindrical extension 53 on the anchor plate, which additionally contributes to the stable support of the spring element 45.
  • the armature 13 in one piece.
  • the sleeve-shaped recess 17 is designed as a blind hole in the armature 13.
  • the armature 13 in two parts.
  • the sleeve-shaped recess is passed as a bore through the armature 13 and then closed with a second component. This is, for example, positively or positively connected to the armature 13.
  • the second component with which the sleeve-shaped recess 17 is closed for example, welded, screwed or soldered.
  • the connection between the armature 13 and the second component, which closes the sleeve-shaped recess 17 is liquid-tight.
  • the armature 13 and the anchor sleeve 27 are enclosed by a second spring element 55.
  • the second spring element 55 acts on the one hand on the magnet actuator 7 opposite side of the armature plate 15 and on the other hand on the annular extension 29 on the anchor sleeve 27.
  • the second spring element 55 is also preferably designed as a compression spring coil spring.
  • the injector 1 is pressurized with fuel under system pressure. About the fuel inlet 57, the fuel flows into an annular space 59 which surrounds the valve piece 39. Via an inlet throttle 61, the fuel flows from the annular space 59 into a control chamber 63 in the valve piece 39.
  • the control chamber 63 is delimited by a valve piston 65, which is guided in the valve piece. Fuel can flow out of the control chamber 63 via an outlet throttle 67.
  • the outlet throttle 67 can be closed or released by the control valve 5.
  • the magnetic actuator 7 is energized. It forms a magnetic field. Due to the magnetic field, the armature plate 15 is attracted by the magnetic actuator 7. The armature 13 moves in the direction of the magnetic actuator 7. The magnetic force generated by the magnetic actuator 7 is greater than the spring force of the first spring element 45. At the same time the movement of the armature 13 is supported by the second spring element 55. As a result of the movement of the armature 13, the volume in the control chamber 43 initially increases. As a result, the pressure in the control chamber 43 decreases. The compressive force acting on the anchor bolt 19 decreases. At the same time, fuel under system pressure acts on the closing element 25 via the outlet throttle 67. This pressure force is sufficient to open the control valve 5.
  • An injection valve member not shown here, opens at least one injection opening in a combustion chamber of an internal combustion engine and the injection process is started.
  • the control valve 5 To end the injection process, the control valve 5 must be closed again. For this purpose, the energization of the magnetic actuator 7 is terminated. The magnetic field which has formed around the coils 9 collapses. By the spring force of the spring element 45, the armature 13 is moved away from the magnetic actuator 7. The movement of the armature 13 is limited by the anchor sleeve 27 by the armature 13 abuts against the anchor sleeve 27. By the movement of the armature 13, the volume in the control chamber 43 is first reduced. The pressure in the control chamber 43 increases. Due to the increasing pressure of the anchor bolt 19 is moved in the direction of the control valve.
  • the closing element 25 is placed in its seat and thus closes the connection from the control chamber 63 via the outlet throttle 67 in a fuel return, not shown here. Due to the closed discharge throttle 67, fuel under system pressure can flow via the inlet throttle 61 into the control chamber 63. The pressure in the control chamber 63 increases again and the valve piston 65 is moved in the direction of the injection valve member. The injection port is closed and the injection process is completed.
  • an extension 69 is formed on the anchor bolt 19 between the closing element 25 and the anchor sleeve 27.
  • To limit the stroke of the anchor bolt 19 proposes with the extension 69 to the anchor sleeve 27.
  • the distance between the extension 69 and the anchor sleeve 27 is preferably selected when the control valve 5 is closed so that it corresponds to the desired stroke.

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

L'invention concerne un injecteur pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne, comprenant un obturateur d'injection qui ouvre ou ferme au moins une ouverture d'injection, sachant que l'obturateur d'injection est asservi par une soupape de commande (5) à actionnement magnétique. La soupape de commande (5) à actionnement magnétique comprend un induit (13) avec une plaque d'induit (15) qui coopère avec un actionneur magnétique (7) comprenant une bobine (9). Un premier élément de ressort (45) est guidé sur la plaque d'induit (15) de telle sorte que, lorsque la bobine (9) n'est pas sous tension, la plaque d'induit (15) est repoussée par la force de ressort de l'élément de ressort (45) pour l'éloigner de la bobine (9).
PCT/EP2007/063408 2007-01-10 2007-12-06 Injecteur pour l'injection de carburant WO2008083882A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710001550 DE102007001550A1 (de) 2007-01-10 2007-01-10 Injektor zum Einspritzen von Kraftstoff
DE102007001550.1 2007-01-10

Publications (1)

Publication Number Publication Date
WO2008083882A1 true WO2008083882A1 (fr) 2008-07-17

Family

ID=39018068

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/063408 WO2008083882A1 (fr) 2007-01-10 2007-12-06 Injecteur pour l'injection de carburant

Country Status (2)

Country Link
DE (1) DE102007001550A1 (fr)
WO (1) WO2008083882A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2988021B1 (fr) * 2012-03-15 2015-01-09 Bosch Gmbh Robert Procede de realisation d'une soupape ainsi qu'outil de matricage d'une calotte dans la broche d'induit d'une soupape
DE102013107060A1 (de) 2013-07-04 2015-01-08 Otto Egelhof Gmbh & Co. Kg Schaltventil zur Regelung eines Massenstroms
CN105971792B (zh) * 2016-05-31 2017-05-24 清华大学 具有改进的衔铁上行限止装置的电控高压喷油器
CN106050500B (zh) * 2016-05-31 2017-05-24 清华大学 具有改进的衔铁装置的电控高压喷油器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052604A1 (de) * 2000-10-24 2002-05-02 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
WO2003006817A2 (fr) * 2001-07-10 2003-01-23 Robert Bosch Gmbh Electrovanne a raccord tournant a douille
EP1316719A2 (fr) * 2001-11-30 2003-06-04 Robert Bosch Gmbh Injecteur comprenant une soupape électromagnétique pour la commande d'une soupape d'injection
EP1359316A2 (fr) * 2002-05-03 2003-11-05 Delphi Technologies, Inc. Système d'injection de carburant
DE10240879A1 (de) * 2002-09-04 2004-03-18 Robert Bosch Gmbh Injektorgeführter Ventilkolben

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052604A1 (de) * 2000-10-24 2002-05-02 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
WO2003006817A2 (fr) * 2001-07-10 2003-01-23 Robert Bosch Gmbh Electrovanne a raccord tournant a douille
EP1316719A2 (fr) * 2001-11-30 2003-06-04 Robert Bosch Gmbh Injecteur comprenant une soupape électromagnétique pour la commande d'une soupape d'injection
EP1359316A2 (fr) * 2002-05-03 2003-11-05 Delphi Technologies, Inc. Système d'injection de carburant
DE10240879A1 (de) * 2002-09-04 2004-03-18 Robert Bosch Gmbh Injektorgeführter Ventilkolben

Also Published As

Publication number Publication date
DE102007001550A1 (de) 2008-07-17

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