EP2148080A1 - Dispositif de ventilation d'injection de carburant - Google Patents

Dispositif de ventilation d'injection de carburant Download PDF

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Publication number
EP2148080A1
EP2148080A1 EP09100299A EP09100299A EP2148080A1 EP 2148080 A1 EP2148080 A1 EP 2148080A1 EP 09100299 A EP09100299 A EP 09100299A EP 09100299 A EP09100299 A EP 09100299A EP 2148080 A1 EP2148080 A1 EP 2148080A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
injection valve
valve device
ring body
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.)
Withdrawn
Application number
EP09100299A
Other languages
German (de)
English (en)
Inventor
Dietmar Uhlmann
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 EP2148080A1 publication Critical patent/EP2148080A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear

Definitions

  • the invention relates to a fuel injection valve device with a control valve, which comprises a valve body.
  • the object of the invention is to simplify the production of a fuel injection valve device with a control valve which comprises a valve body, and / or to extend the life thereof.
  • a fuel injection valve device with a control valve which comprises a valve body, characterized in that the valve body is designed at least in two parts with a closing element and a guide element.
  • the fuel injection valve device is also referred to as a fuel injector.
  • the two-part design of the valve body simplifies manufacturing.
  • the guide member and the closure member may be formed of different materials.
  • the surface texture or the hardness of individual functional surfaces of the closing element and of the guide element can be adapted more easily to the different functions.
  • different valve strokes can be realized in a simple manner.
  • a preferred embodiment of the fuel injection valve device is characterized in that the guide element is designed as a valve pin.
  • the valve pin has substantially the shape of a right circular cylinder and performs a guiding function.
  • valve pin is guided in a guide sleeve movable back and forth.
  • the guide sleeve has substantially the shape of a circular cylinder jacket.
  • the closing element comprises a valve ring body.
  • the valve ring is preferably significantly harder than the valve pin designed to minimize wear on a valve seat.
  • a spring plate is integrated in the valve ring body.
  • a further preferred embodiment of the fuel injection valve device is characterized in that the valve ring body has a circumferential sealing surface.
  • the sealing surface may be curved or cone-shaped and cooperates with a sealing edge to represent a valve seat.
  • a further preferred embodiment of the fuel injection valve device is characterized in that the valve ring body has a circumferential sealing edge.
  • the sealing edge cooperates with a sealing surface to represent a valve seat.
  • a further preferred embodiment of the fuel injection valve device is characterized in that the valve ring body is pressed onto the guide element.
  • a frictional or non-positive connection between the valve ring body and the guide element is created by a press fit.
  • a further preferred embodiment of the fuel injection valve device is characterized in that the guide element has a shoulder has, on which rests the closing element. The paragraph can form a stop when pressing the closing element.
  • a further preferred embodiment of the fuel injection valve device is characterized in that the closing element and the guide element are formed from different materials.
  • the targeted selection of different materials, the two elements can be better adapted to their function in the operation of the fuel injection valve device.
  • a further preferred embodiment of the fuel injection valve device is characterized in that the closing element and the guide element have different hardnesses.
  • the closure member preferably has a greater hardness than the guide member to minimize undesirable wear on the valve seat.
  • a fuel injection valve device 1 is shown in longitudinal section.
  • the fuel injection valve device 1 is also referred to as a fuel injector and serves to inject high-pressure fuel into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injector 1 communicates with a central high-pressure fuel source (also not shown), which is also referred to as a common rail.
  • the fuel injector 1 comprises an injector housing 2 with a holding body 4, a nozzle body 5, a valve plate 6 and a throttle plate 8.
  • a high-pressure inlet channel 10 extends through the injector housing 2 to an injection nozzle 12, from which highly pressurized fuel is injected into the combustion chamber, when a nozzle needle 14 lifts from an associated nozzle needle seat.
  • the opening and / or closing movement of the nozzle needle 14 is controlled by the pressure in a control chamber 15 of a control valve 16.
  • control valve 16 comprises a valve body 18 which can be actuated by an actuator 24 with the interposition of a valve piston 19 and a coupler piston 20.
  • the control valve 16 can be actuated by electromagnetic or piezoelectric actuators.
  • the valve body 18 is in its closed position and can be moved from its closed position into an open position via a punch 22 provided on the end of the coupler piston 20 close to the combustion chamber.
  • control valve 16 comprises a guide sleeve 30 which is held by the biasing force of a valve spring 32 in close contact with the throttle plate 8.
  • the valve spring 32 is arranged together with the guide sleeve 30 and the valve body 18 in a valve chamber 34 which communicates with the control chamber (15 in FIG. 2 ) of the control valve 16 is in communication.
  • control chamber is provided with an inlet channel (not shown), which is preferably equipped with an inlet throttle, with the high-pressure inlet channel (10 in FIG FIG. 2 ) is in communication, both in the control chamber and in the valve chamber high pressure, as long as the valve body 18 is in its closed position.
  • a pressure relief chamber 36 which is bounded in the radial direction by the guide sleeve 30 and in the axial direction of the valve closing body 18 and the throttle plate 8, low pressure, since the pressure relief chamber 36 via a Drain passage 37, which may be equipped with an outlet throttle, with a (not shown) return of the fuel injector 1 is in communication.
  • FIG. 4 is shown by an eruption on the valve body 18 that the valve body 18 is made in two parts.
  • the valve body 18 comprises on the one hand a closing element 40 with a spring plate 41 and a valve ring body 42.
  • the valve ring body 42 is integrally connected to the spring plate 41.
  • the valve spring 32 is clamped between the spring plate 41 and the guide sleeve 30.
  • valve ring body 42 On the valve ring body 42, a curved in the illustrated section sealing surface 44 is formed, which bears sealingly against a sealing edge 45 to form a valve seat.
  • the biasing force of the valve spring 32 of the valve ring body 42 is held in the illustrated closed position.
  • valve ring body 42 When the valve ring body 42 lifts off with its sealing surface 44 from the sealing edge 45, then the valve seat is opened and a connection between the valve chamber 34 and a pressure relief chamber 48 is released. When the valve ring body 42 is in its open position, the pressure in the valve chamber 34 and in the control chamber 15 is released, so that the nozzle needle lifts off the associated nozzle needle seat and fuel is injected into the combustion chamber of the internal combustion engine.
  • the valve ring body 42 is pressed onto a pin 51, which starts from a guide element 54, which constitutes the second part of the valve body 18.
  • the guide element 54 is designed as a valve pin 55 which is integrally connected to the pin 51.
  • a shoulder 56 is formed, which constitutes a stop when pressing the valve ring body 42 on the pin 51.
  • the valve pin has at its combustion chamber near the end of a guide portion 57, with which the valve pin 55 is slidably guided in the guide sleeve 30 in the longitudinal direction.
  • the guide portion 57 has, for example, due to an additional processing, a slightly smaller outer diameter than a connecting portion 58 of the valve pin 55.
  • the connecting portion 58 connects the guide portion 57 of the valve pin 55 integrally with the pin 51 at the combustion chamber remote end of the guide member 54th
  • the valve pin 55 with its guiding function to the guide sleeve 30 can be made in a simple manner, for example by turning.
  • the hardness of the valve pin can be adapted to the guiding function, in particular in the guide section 57.
  • the guide gap between the valve pin 55 and the guide sleeve can be adjusted in a simple manner during manufacture.
  • valve ring body 42 especially on the sealing surface 44, designed to be particularly hard to the wear occurring at the valve seat during operation minimize.
  • the hardness of the valve ring body 42 is preferably adapted to the hardness of the valve plate 5.
  • the hardness of the valve pin 55 can be adapted to the hardness of the guide sleeve 30.
  • the materials of which the valve ring body 42 and the valve pin 55 are formed may vary. Due to the two-part design, different materials and hardnesses of valve pin 55 and valve ring 42 are easy to implement.
  • valve lift of the valve body 18 can be adjusted either via a variable height 61 on the valve pin 55 or via a variable height 62 on the valve ring body 42. Also, the insertion depth or Aufpresstiefe the valve ring body 42 can be varied. The pressing-in or pressing-in of the valve ring body 42 may not take place up to the shoulder 56 on the valve pin 55. In addition, the valve seat geometry, in particular the seat angle and the convexity, can be changed by a simple replacement of the valve ring body 42.

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)
EP09100299A 2008-07-23 2009-05-27 Dispositif de ventilation d'injection de carburant Withdrawn EP2148080A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810040637 DE102008040637A1 (de) 2008-07-23 2008-07-23 Kraftstoffeinspritzventileinrichtung

Publications (1)

Publication Number Publication Date
EP2148080A1 true EP2148080A1 (fr) 2010-01-27

Family

ID=41264282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09100299A Withdrawn EP2148080A1 (fr) 2008-07-23 2009-05-27 Dispositif de ventilation d'injection de carburant

Country Status (3)

Country Link
EP (1) EP2148080A1 (fr)
CN (1) CN101634265A (fr)
DE (1) DE102008040637A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2466108A1 (fr) * 2010-12-20 2012-06-20 Robert Bosch GmbH Soupape d'injection de combustible
EP2354526A3 (fr) * 2010-01-28 2013-07-24 Robert Bosch GmbH Injecteur de carburant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027187A1 (de) 2009-06-25 2010-12-30 Robert Bosch Gmbh Kraftstoffinjektor
DE102012208075A1 (de) * 2012-05-15 2013-11-21 Man Diesel & Turbo Se Injektor für eine Kraftstoffversorgungsanlage einer Brennkraftmaschine sowie Kraftstoffversorgungsanlage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512730C1 (de) * 1995-04-05 1996-08-29 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzanlage für Brennkraftmaschine
EP0851115A1 (fr) * 1996-12-23 1998-07-01 ELASIS SISTEMA RICERCA FIAT NEL MEZZOGIORNO Società Consortile per Azioni Soupape électromagnétique de dosage à obturateur sphérique pour injecteur de combustible
WO1999034111A1 (fr) * 1997-12-23 1999-07-08 Siemens Aktiengesellschaft Soupape d'injection a vanne de controle
DE19949528A1 (de) * 1999-10-14 2001-04-19 Bosch Gmbh Robert Doppelschaltendes Steuerventil für einen Injektor eines Kraftstoffeinspritzsystems für Brennkraftmaschinen mit hydraulischer Verstärkung des Aktors
DE102004061800A1 (de) 2004-12-22 2006-07-06 Robert Bosch Gmbh Injektor eines Kraftstoffeinspritzsystems einer Brennkraftmaschine
DE102006021736A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512730C1 (de) * 1995-04-05 1996-08-29 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzanlage für Brennkraftmaschine
EP0851115A1 (fr) * 1996-12-23 1998-07-01 ELASIS SISTEMA RICERCA FIAT NEL MEZZOGIORNO Società Consortile per Azioni Soupape électromagnétique de dosage à obturateur sphérique pour injecteur de combustible
WO1999034111A1 (fr) * 1997-12-23 1999-07-08 Siemens Aktiengesellschaft Soupape d'injection a vanne de controle
DE19949528A1 (de) * 1999-10-14 2001-04-19 Bosch Gmbh Robert Doppelschaltendes Steuerventil für einen Injektor eines Kraftstoffeinspritzsystems für Brennkraftmaschinen mit hydraulischer Verstärkung des Aktors
DE102004061800A1 (de) 2004-12-22 2006-07-06 Robert Bosch Gmbh Injektor eines Kraftstoffeinspritzsystems einer Brennkraftmaschine
DE102006021736A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354526A3 (fr) * 2010-01-28 2013-07-24 Robert Bosch GmbH Injecteur de carburant
EP2466108A1 (fr) * 2010-12-20 2012-06-20 Robert Bosch GmbH Soupape d'injection de combustible

Also Published As

Publication number Publication date
DE102008040637A1 (de) 2010-01-28
CN101634265A (zh) 2010-01-27

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