EP2984328B1 - Injecteur de carburant pour moteurs a combustion interne - Google Patents

Injecteur de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP2984328B1
EP2984328B1 EP14703854.1A EP14703854A EP2984328B1 EP 2984328 B1 EP2984328 B1 EP 2984328B1 EP 14703854 A EP14703854 A EP 14703854A EP 2984328 B1 EP2984328 B1 EP 2984328B1
Authority
EP
European Patent Office
Prior art keywords
chamber
control valve
control
pressure
throttle
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
EP14703854.1A
Other languages
German (de)
English (en)
Other versions
EP2984328A1 (fr
Inventor
Henning Kreschel
Holger Rapp
Thomas Schwarz
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 EP2984328A1 publication Critical patent/EP2984328A1/fr
Application granted granted Critical
Publication of EP2984328B1 publication Critical patent/EP2984328B1/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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • 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
    • F02M63/0077—Valve seat details
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2547/001—Control chambers formed by movable sleeves
    • 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
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • 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

Definitions

  • the invention relates to a fuel injection valve for internal combustion engines, as it is used for fuel injection into the combustion chamber of an internal combustion engine.
  • Fuel injection valves as they are preferably used for fuel injection directly into the combustion chamber of an internal combustion engine, are known from the prior art.
  • compressed fuel is made available in a rail by means of a high-pressure pump and injected by means of injectors into the respective combustion chambers of an internal combustion engine.
  • the injection is controlled by means of a nozzle needle, which performs a longitudinal movement and thereby opens and closes one or more injection openings. Since it is not useful or not possible to move the nozzle needle directly by an electric actuator, in particular in the injection of fuel under high pressure, hydraulic forces exerted by the compressed fuel on the nozzle needle, used for driving.
  • a control chamber is formed in the fuel injection valve, the pressure of which acts directly or indirectly on the nozzle needle and thereby presses against a nozzle seat, so that the nozzle needle closes the injection openings.
  • the fuel pressure in the control chamber is influenced by means of a control valve, wherein the control chamber is alternately connected to a low-pressure chamber or this connection is interrupted by the control valve.
  • a fuel injection valve which has such a control valve.
  • the control valve is designed here as a so-called 3/2-way valve and controls the connection of the control chamber on the one hand to the high pressure source, from which the compressed fuel is supplied to the injection valve, and on the other hand to a low pressure chamber.
  • the control valve has a control valve member, which can be moved by means of an electrical actuator, such as a magnet or a piezoelectric actuator, within the control valve chamber and thus cooperates with a first control valve seat and a second control valve seat.
  • control valve member If the control valve member is in contact with the first control valve seat, the connection of the control valve chamber to the low-pressure chamber or a leakage connection, which has a connection to a low-pressure region, is closed.
  • the control chamber is connected via an inlet throttle with the high-pressure passage and via an outlet throttle with the control valve chamber.
  • Another example is from the EP 2 019 198 A2 known.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that during the injection process substantially only the amount of fuel that is necessary to reduce the pressure in the control chamber, must be dissipated in the low pressure space. This increases the efficiency of the fuel injection valve while reducing the heat input in the actuator and return system. The fuel consumption of the internal combustion engine is thus reduced.
  • the fuel injection valve to a pressure chamber in which a nozzle needle is arranged longitudinally displaceable, wherein the nozzle needle cooperates by its longitudinal movement with a nozzle seat and thereby opens at least one injection port and closes, wherein the nozzle needle directed by the pressure in a control chamber in the direction of the nozzle seat Closing force experiences.
  • a control valve is provided, through which the pressure in the control chamber is adjustable, wherein the control valve comprises a connectable to the control chamber control valve chamber, in which a control valve member is arranged longitudinally movable.
  • the control valve chamber is connected to the control chamber via an outlet throttle and to the pressure chamber via an inlet throttle.
  • the control valve chamber is connected via a bypass with the control room.
  • the control valve member can open and close the bypass and the inlet throttle.
  • the opening behavior of the nozzle needle can be determined via the design of inlet throttle and bypass, the closing behavior and the design of the outlet throttle.
  • control valve member is designed so that it opens the bypass and the inlet throttle when it rests against a first control valve seat and closes the connection between the control valve chamber and a low-pressure chamber, and when connected to a second control valve seat, the connection between the control valve chamber and opens the low pressure chamber and closes the bypass and the inlet throttle.
  • the second control valve seat is formed on a throttle plate, wherein the outlet throttle, the bypass and the inlet throttle are also formed in the throttle plate.
  • the control valve element Bypass and inlet throttle can be opened and closed directly in a compact and easy-to-manufacture design.
  • a sleeve delimits the control chamber from a high-pressure-carrying pressure chamber and simultaneously guides the nozzle needle during the opening and closing movement. Due to this simple yet reliable design, the nozzle-side openings of the bypass and the inlet throttle can be designed such that the bypass opens into the control chamber and the inlet throttle into the pressure chamber. In addition, for different settings, the volume of the control room can be easily varied.
  • Fig. 1 shows a longitudinal section through a fuel injection valve according to the invention, wherein only the essential areas are shown schematically.
  • Fig. 1 schematically shows a fuel injection valve 11 according to the invention in longitudinal section.
  • the fuel injection valve 11 has a valve body 4 and a nozzle body 8 , which are braced against each other with the interposition of a throttle plate 6 by means of a tensioning device, not shown.
  • a pressure chamber 14 is formed, in which a piston-shaped nozzle needle 10 is arranged longitudinally displaceable.
  • the nozzle needle 10 has at its end facing the combustion chamber on a sealing surface 15 , with which it cooperates with a nozzle seat 13 which is formed at the combustion chamber end of the pressure chamber 14 .
  • nozzle seat 13 From the nozzle seat 13 go from one or more injection ports 12 , which open in installation position of the fuel injection valve 11 directly into a combustion chamber of an internal combustion engine.
  • the nozzle needle 10 is pressed against the nozzle seat 13 by a closing spring 18, which acts on a shoulder 16 and is biased against the throttle plate 6 via a sleeve 22 .
  • the sleeve 22 simultaneously serves to guide the longitudinal movement of the nozzle needle 10 and delimits a control chamber 20 from the pressure chamber 14 .
  • a control valve 30 comprising a control valve chamber 31, a control valve member 34, two control valve seats 37 and 39 and a spring 38th arranged.
  • the control valve member 34 which can be moved via an actuator 41 arranged in a low-pressure chamber 40 is arranged longitudinally displaceable in the control valve chamber 31 and forms at a sealing edge 50 with the valve body 4, a first control valve seat 37 and at a sealing surface 51 with the throttle 6, a second control valve seat 39 off.
  • the throttle plate 6 serves as an abutment for the spring 38, which surrounds the control valve member 34 and this is acted upon by a force in the direction of the low pressure space 40 .
  • the control valve chamber 31 is connected via the outlet throttle 1 to the control chamber 20 and via the inlet throttle 3 to the pressure chamber 14 .
  • the control valve chamber 31 is connected via the bypass 2 with the control chamber 20 .
  • the control valve member 34 can open and close the bypass 2 and the inlet throttle 3 and, on the other hand, the connection of the control valve chamber 31 to the low-pressure chamber 40 .
  • the low-pressure space 40 is without pressure or only at a very low pressure level, so that only very small forces are exerted on the control valve member 34 by it.
  • a high fuel pressure as it also prevails in the high pressure passage 25 .
  • Characterized is the control valve member 34 in contact with the first control valve seat 37.
  • the fuel pressure in the control chamber 20 is exerted on the nozzle seat facing away from end face of the nozzle needle 10 a hydraulic force in the direction of the nozzle seat 13, which presses the nozzle needle 10 against the nozzle seat. 13 Since the nozzle needle 10 is in contact with the nozzle seat 13 , the pressure chamber 14 is sealed against the injection openings 12 , so that no fuel from the pressure chamber 14 can get into the combustion chamber of the internal combustion engine.
  • the fuel flowing from the control chamber 20 via the outlet throttle 1 into the control valve chamber 31 also leads to a pressure drop in the control chamber 20 .
  • the fuel pressure dissipating in the control chamber 20 leads to a reduced hydraulic force on the nozzle seat facing away from the end face of the nozzle needle 10, so that the hydraulic forces acting through the pressure in the pressure chamber 14 on the nozzle needle 10, in particular on parts of the sealing surface 15 , that the nozzle needle 10 lifts off from the nozzle seat 13 and is moved counter to the force of the closing spring 18 in the direction of the valve body 4 .
  • a gap is opened between the sealing surface 15 and the nozzle seat 13 , flows through the fuel from the pressure chamber 14 to the injection openings 12 and is injected through the injection openings 12 in a combustion chamber of the internal combustion engine.
  • control valve member 34 is moved back into abutment against the first control valve seat 37 by means of the actuator 41 .
  • the connection of the control valve chamber 31 with the low-pressure chamber 40 is interrupted.
  • the sealing surface 51 lifts off from the second control valve seat 39 , so that the control valve chamber 31 is connected via the inlet throttle 3 to the high-pressure-carrying pressure chamber 14 .
  • the control valve chamber 31 is in turn connected both via the outlet throttle 1 and now also via the bypass 2 with the control chamber 20 .
  • a high fuel pressure quickly builds up again in control valve chamber 31 and control chamber 20 .

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 (4)

  1. Soupape d'injection de carburant pour moteurs à combustion interne pour injection de carburant à haute pression, comprenant un espace de pression (14) dans lequel une aiguille d'injecteur (10) est disposée de manière déplaçable longitudinalement, l'aiguille d'injecteur (10) coopérant par son déplacement longitudinal avec un siège d'injecteur (13) et de ce fait ouvrant et fermant au moins une ouverture d'injection (12), et l'aiguille d'injecteur (10), sous l'effet de la pression dans un espace de commande (20), subissant une force de fermeture orientée dans la direction du siège d'injecteur (13), et comprenant une soupape de commande (30) réalisée dans un corps de soupape (4), par le biais de laquelle la pression dans l'espace de commande (20) peut être ajustée, la soupape de commande (30) comprenant un espace de soupape de commande (31) pouvant être connecté à l'espace de commande (20), dans lequel un organe de soupape de commande (34) est disposé de manière déplaçable longitudinalement, et comprenant un étranglement d'écoulement de sortie (1) qui relie l'espace de commande (20) à l'espace de soupape de commande (31) et un étranglement d'alimentation (3) qui relie l'espace de pression (14) de manière commutable à l'espace de soupape (31),
    caractérisée en ce que
    l'espace de soupape de commande (31) peut être relié à l'espace de commande (20) par une dérivation (2), l'organe de soupape de commande (34) pouvant ouvrir et fermer la dérivation (2) et l'étranglement d'alimentation (3).
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que l'organe de soupape de commande (34), lors de l'application contre un premier siège de soupape de commande (37), ouvre la dérivation (2) et l'étranglement d'alimentation (3) et ferme la liaison entre l'espace de soupape de commande (31) et un espace basse pression (40), et lors de l'application contre un deuxième siège de soupape de commande (39), ouvre la liaison entre l'espace de soupape de commande (31) et l'espace basse pression (40) et ferme la dérivation (2) et l'étranglement d'alimentation (3) .
  3. Soupape d'injection de carburant selon la revendication 2, caractérisée en ce que le deuxième siège de soupape de commande (39) est réalisé au niveau d'un disque d'étranglement (6) et en ce que l'étranglement d'écoulement de sortie (1), la dérivation (2) et l'étranglement d'alimentation (3) sont réalisés dans le disque d'étranglement (6).
  4. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce qu'une douille (22) limite l'espace de commande (20).
EP14703854.1A 2013-04-11 2014-02-11 Injecteur de carburant pour moteurs a combustion interne Not-in-force EP2984328B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013206383.0A DE102013206383A1 (de) 2013-04-11 2013-04-11 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/EP2014/052642 WO2014166651A1 (fr) 2013-04-11 2014-02-11 Injecteur de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP2984328A1 EP2984328A1 (fr) 2016-02-17
EP2984328B1 true EP2984328B1 (fr) 2018-04-11

Family

ID=50073196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14703854.1A Not-in-force EP2984328B1 (fr) 2013-04-11 2014-02-11 Injecteur de carburant pour moteurs a combustion interne

Country Status (4)

Country Link
EP (1) EP2984328B1 (fr)
CN (1) CN105102804B (fr)
DE (1) DE102013206383A1 (fr)
WO (1) WO2014166651A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106593719A (zh) * 2017-01-18 2017-04-26 哈尔滨工程大学 谐振旁通式电控喷油器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10205970A1 (de) * 2002-02-14 2003-09-04 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10353169A1 (de) * 2003-11-14 2005-06-16 Robert Bosch Gmbh Injektor zur Einspritzung von Kraftstoff in Brennräume von Brennkraftmaschinen, insbesondere piezogesteuerter Common-Rail-Injektor
JP2007205324A (ja) * 2006-02-06 2007-08-16 Denso Corp 燃料噴射弁
DE102006057025A1 (de) * 2006-12-04 2008-06-05 Robert Bosch Gmbh Magnetventil mit Kugelsitz
DE102007034318A1 (de) * 2007-07-24 2009-01-29 Robert Bosch Gmbh Injektor
DE102009000283A1 (de) * 2008-02-04 2009-08-06 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff
DE102008001330A1 (de) 2008-04-23 2009-10-29 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen

Also Published As

Publication number Publication date
WO2014166651A1 (fr) 2014-10-16
CN105102804B (zh) 2018-04-27
CN105102804A (zh) 2015-11-25
EP2984328A1 (fr) 2016-02-17
DE102013206383A1 (de) 2014-10-16

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