EP2025922A2 - Soupape d'injection de carburant pour moteurs à combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs à combustion interne Download PDF

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Publication number
EP2025922A2
EP2025922A2 EP08104675A EP08104675A EP2025922A2 EP 2025922 A2 EP2025922 A2 EP 2025922A2 EP 08104675 A EP08104675 A EP 08104675A EP 08104675 A EP08104675 A EP 08104675A EP 2025922 A2 EP2025922 A2 EP 2025922A2
Authority
EP
European Patent Office
Prior art keywords
actuator
valve
intermediate element
guide element
guide
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
EP08104675A
Other languages
German (de)
English (en)
Other versions
EP2025922A3 (fr
EP2025922B1 (fr
Inventor
Ilona Schwab
Holger Rapp
Andreas Rettich
Markus Rueckle
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 EP2025922A2 publication Critical patent/EP2025922A2/fr
Publication of EP2025922A3 publication Critical patent/EP2025922A3/fr
Application granted granted Critical
Publication of EP2025922B1 publication Critical patent/EP2025922B1/fr
Ceased 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
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • 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
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided

Definitions

  • the invention relates to a fuel injection valve for internal combustion engines, in particular a solenoid valve for common rail injectors (CRI), according to the preamble of claim 1.
  • a fuel injection valve for internal combustion engines in particular a solenoid valve for common rail injectors (CRI), according to the preamble of claim 1.
  • CRI common rail injectors
  • EP 1 612 403 A1 Injectors for high-speed, self-igniting internal combustion engines which inject the fuel directly into a combustion chamber of an internal combustion engine.
  • the influence on the armature stroke is particularly large. These include those solenoid valves in which the upper stroke stop is formed on the magnet. Due to the rail pressure, the situation occurs that the valve seat changes its axial position relative to the holding body, whereas the position of the upper stroke stop remains unchanged. Overall, this means that the armature stroke decreases with increasing rail pressure.
  • the object of the invention is to show a fuel injection valve, in particular a solenoid valve, in which the armature stroke little changes even at high rail pressure and in particular remains substantially unchanged.
  • a fuel injection valve according to the preamble of claim 1, characterized in that between the actuator and the guide element, a preferably rigid intermediate element is arranged so that a mechanical hold-down force acting on the actuator is introduced via the intermediate element in the guide element, or conversely, when the guide element exerts a force under the influence of the rail pressure, this force acts on the actuator via the intermediate element.
  • a mechanical hold-down force acting on the actuator is introduced via the intermediate element in the guide element, or conversely, when the guide element exerts a force under the influence of the rail pressure, this force acts on the actuator via the intermediate element.
  • One aspect of the invention is the fact that it is now possible to apply a force to the guide element or the guide pin of the valve in order to counteract an extension of the guide element by the rail pressure. Since the intermediate element is essentially rigid, that is to say that, unlike a resilient element or a spring, only very slight elastic or plastic deformations are possible, large mechanical forces can also be applied by the actuator or the electromagnet to the guide element.
  • the application of the force to the guide element is made possible in particular by electromagnet and guide element on the same fixed reference element, preferably on the holding body of the valve, supported. If a force is now exerted on the electromagnet, for example by means of a screw element which presses the electromagnet from the reference element in the direction of the guide element, this force also acts on the guide element. Since the guide member is supported against the same rigid reference element, the guide element can not dodge, but absorbs the force. Conversely, the force exerted by the guide element under the effect of the rail pressure is also absorbed by the actuator.
  • Another aspect of the invention is that a precise adjustment of the armature stroke is made possible.
  • the actuator of the solenoid valve so the electromagnet, against the intermediate element, the intermediate element already exerts a pressure against the guide element in the state without rail pressure.
  • the guide element is subject to a-naturally slight elastic deformation that shortens the length of the guide element.
  • the armature stroke can be accurately adjusted. A complicated setting on exactly classified shims can then be omitted or used only for rough presetting.
  • the guide element and the intermediate element can be embodied in various configurations, which will be explained later in the application. However, it should already be noted at this point that the intermediate element can also be designed as part of the guide element or integrally with the guide element.
  • a preferred embodiment of the valve is characterized in that the intermediate element, which is also referred to as an intermediate piece, bears against a narrowed region of a recess in the actuator.
  • the intermediate element which is also referred to as an intermediate piece
  • the intermediate piece bears against a narrowed region of a recess in the actuator.
  • a further preferred embodiment of the valve is characterized in that the narrowed region is designed as a diameter stage.
  • This embodiment is advantageous in terms of manufacturing technology, since a diameter step, that is to say a region which has a different diameter than another region, can be realized in a simple manner. This is especially true for a solenoid valve, which already has a central bore in the magnetic core, which is then carried out only in a section with a larger or smaller diameter.
  • a further preferred embodiment of the valve is characterized in that the intermediate element has a head portion which abuts against at least one end face of the constricted portion.
  • this embodiment offers the advantage that the intermediate element can center with its head section in the recess in the actuator. If the diameter of the head portion corresponds to the diameter of the larger diameter portion of the recess, the central axis of the intermediate element can be well defined, in particular with regard to the actuator. Another advantage is that the valve spring can be supported on the head section.
  • a further preferred embodiment of the valve is characterized in that the head portion has drainage holes. This allows in a simple manner, the fluid connection of the leakage oil chamber with the area above the actuator.
  • a further preferred embodiment of the valve is characterized in that between the guide element and the intermediate element, a parting line is formed, which is based on a direction from the guide element to the actuator below the sealing seat.
  • a parting line is formed, which is based on a direction from the guide element to the actuator below the sealing seat.
  • a further preferred embodiment of the valve is characterized in that the guide element and the intermediate element bear against one another on a respective end face, wherein at least one of the end faces is formed with a drain groove or a part of a drain groove.
  • the drainage groove in the end face of the guide element and / or the drainage groove in the end face of the intermediate element forms the transverse bore. Due to the hold-down force which is introduced by the actuator through the intermediate element in the guide element, the sealing of the drain groove is also carried out. Since the central bore in the guide element is accessible in this embodiment during parts production from both sides, here is the possibility to arrange an outlet throttle in this central bore and so to reduce the dead volume between drain throttle and sealing seat. It should be noted that the parting line can also be arranged further in the direction of the base of the guide element. In this case, the transverse bore is retained, but then it is part of the intermediate element.
  • a further preferred embodiment of the valve is characterized in that between the guide element and the intermediate element and / or between the intermediate element and the actuator, a non-magnetic Ankerhubeinstellelement and / or a non-magnetic Restletttspalteinstellin is arranged. In this way, the desired settings can be made easily and reduce or avoid magnetic leakage flux.
  • a further preferred embodiment of the valve is characterized in that the hold-down force is introduced via an elastic element in the actuator, wherein the elasticity of this element is greater than that of the arrangement of guide element and intermediate element in the region between the sealing seat and support on the actuator.
  • the elastic element can also be designed in one piece with the actuator or the contact element for the actuator in the holding body.
  • a further preferred embodiment of the valve is characterized in that the actuating element is acted upon by means of a valve spring in the direction of the sealing seat with a force and the valve spring is supported on a head portion of the intermediate element and the adjusting element.
  • this embodiment results in a compact design.
  • a further preferred embodiment of the valve is characterized in that central axes of the guide element, the intermediate element and the actuator are aligned with each other. This results in a structurally simple structure, which offers a good symmetrical force distribution.
  • FIG. 1 a fuel injection valve 10 according to the invention with the fuel-supplying components 12 is shown schematically in longitudinal section.
  • the basic mode of operation of such a fuel injection valve 10 is known to the person skilled in the art and will therefore not be explained in detail. More detailed information can be found for example in the cited document and in the application DE 10 2006 027 485 A1 ,
  • the fuel injection valve 10 has a valve needle 14, a control chamber 16, which is operatively connected to the valve needle 14 is a drain channel 18, which is designed to connect the control chamber 16 with a leakage oil chamber 20, and a control valve 22, which is designed to open and close the drain channel 18.
  • the control valve 22 has a guide element 24, also called guide pin on which an adjusting element 26, also called sealing sleeve or armature, is held axially displaceable, wherein the actuating element 26 is acted upon in the direction of a sealing seat 28 with a force.
  • the control valve 22 also has an actuator 30, here an electromagnet, which is designed to lift the actuator 26 from the sealing seat 28 up-related to the figure.
  • FIG. 2 is an enlargement of FIG. 1 shown in the region of the control valve 22.
  • the actuator 30 has a magnetic core 32 with a magnetic coil 34 inserted therein.
  • the actuator 30 has a recess 36, which is formed as a central bore through the magnetic core 32 and has a narrowed portion 38, which is designed here as a diameter stage.
  • an end face 40 is formed, against which a head section 42 of an intermediate element 44 rests.
  • drain holes 46 are introduced, which form a fluid passage between the leakage oil chamber 20 and the area above-related to the figure of the head portion 42.
  • a valve spring 48 At the head portion 42 is a valve spring 48 at one end, while the other end is supported on the actuator 26.
  • the residual air gap which prevents magnetic and hydraulic sticking of the armature is necessary at the upper stroke stop, for example, as a complete or partial coating of the end face of the magnetic core 32 and / or the end face of the actuating element 26 or be realized as a ground step in one or both of said end faces.
  • the intermediate element 44 rests with an end face 52 against an end face 54 of the guide element 24. Between the end faces 52, 54, a parting line 56 is formed, which in this embodiment is above-related to the figure of the sealing seat 28.
  • the drainage channel 18 terminates within the guide element 24 in a transverse bore 58.
  • the central axes 60, 62, 64 of the actuator 30, the intermediate element 44 and the guide element 24 are aligned with each other.
  • the threaded bandage 66 has a magnetic clamping nut 72 and a sleeve 74.
  • the magnetic clamping nut 72 has a first thread 76, which engages in a second thread 78 of a holding body 80.
  • the sleeve 74 seals the leakage oil chamber 20 relative to the holding body 80 with a sealing ring 82.
  • overmolded tabs 84 are arranged, which serve the electrical contacting of the magnetic coil 34.
  • the intermediate element 44 and the guide element 24 can also be made in one piece.
  • the parting line 56 is then so at the lower end of the guide member 24th
  • adjusting elements for the valve spring force are not shown in detail.
  • an adjustment be provided for the valve spring force.
  • it may be in the embodiment according to FIG. 2 around a ring or in the embodiment according to FIG. 3 to act as a sickle disk.
  • the sickle plate is advantageous because the valve spring 48 are pushed over the intermediate element 44 during assembly from above and later but must be supported on the end face. A sickle disk can compensate for the diameter jump here.

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)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20080104675 2007-08-10 2008-07-09 Soupape d'injection de carburant pour moteurs à combustion interne Ceased EP2025922B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710037825 DE102007037825A1 (de) 2007-08-10 2007-08-10 Kraftstoffeinspritzventil für Brennkraftmaschinen

Publications (3)

Publication Number Publication Date
EP2025922A2 true EP2025922A2 (fr) 2009-02-18
EP2025922A3 EP2025922A3 (fr) 2009-04-01
EP2025922B1 EP2025922B1 (fr) 2010-12-22

Family

ID=40076673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080104675 Ceased EP2025922B1 (fr) 2007-08-10 2008-07-09 Soupape d'injection de carburant pour moteurs à combustion interne

Country Status (2)

Country Link
EP (1) EP2025922B1 (fr)
DE (2) DE102007037825A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010105864A1 (fr) * 2009-03-20 2010-09-23 Robert Bosch Gmbh Cale d'espace résiduel
US7891843B2 (en) 2008-11-10 2011-02-22 Hyundai Telecommunication Co., Ltd. LED lighting device
US7950826B2 (en) 2008-10-24 2011-05-31 Hyundai Telecommunication Co., Ltd. Circle type LED lighting flood lamp using nano spreader
US20120216772A1 (en) * 2009-11-10 2012-08-30 Robert Bosch Gmbh Fuel injector
EP2254130A3 (fr) * 2009-05-19 2014-12-10 Robert Bosch GmbH Plaque d'écartement pour l'air résiduel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612403A1 (fr) 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Soupape servo pour controller l'injecteur d'un moteur à combustion interne
DE102006027485A1 (de) 2006-06-14 2007-12-20 Robert Bosch Gmbh Kraftstoffeinspritzventil mit Sicherheitssteuerventil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3802648A1 (de) * 1988-01-29 1989-08-10 Mainz Gmbh Feinmech Werke Elektromagnetisch betaetigtes, hydraulisches schnellschaltventil
DE102006057935A1 (de) * 2006-12-08 2008-06-12 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612403A1 (fr) 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Soupape servo pour controller l'injecteur d'un moteur à combustion interne
DE102006027485A1 (de) 2006-06-14 2007-12-20 Robert Bosch Gmbh Kraftstoffeinspritzventil mit Sicherheitssteuerventil

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7950826B2 (en) 2008-10-24 2011-05-31 Hyundai Telecommunication Co., Ltd. Circle type LED lighting flood lamp using nano spreader
US7891843B2 (en) 2008-11-10 2011-02-22 Hyundai Telecommunication Co., Ltd. LED lighting device
WO2010105864A1 (fr) * 2009-03-20 2010-09-23 Robert Bosch Gmbh Cale d'espace résiduel
CN102362319A (zh) * 2009-03-20 2012-02-22 罗伯特·博世有限公司 剩余气隙盘
CN102362319B (zh) * 2009-03-20 2013-11-20 罗伯特·博世有限公司 剩余气隙盘
EP2254130A3 (fr) * 2009-05-19 2014-12-10 Robert Bosch GmbH Plaque d'écartement pour l'air résiduel
US20120216772A1 (en) * 2009-11-10 2012-08-30 Robert Bosch Gmbh Fuel injector

Also Published As

Publication number Publication date
EP2025922A3 (fr) 2009-04-01
DE102007037825A1 (de) 2009-02-12
DE502008002050D1 (de) 2011-02-03
EP2025922B1 (fr) 2010-12-22

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