WO2013026611A1 - Injecteur pour un fluide doté d'une alimentation en fluide - Google Patents

Injecteur pour un fluide doté d'une alimentation en fluide Download PDF

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Publication number
WO2013026611A1
WO2013026611A1 PCT/EP2012/063201 EP2012063201W WO2013026611A1 WO 2013026611 A1 WO2013026611 A1 WO 2013026611A1 EP 2012063201 W EP2012063201 W EP 2012063201W WO 2013026611 A1 WO2013026611 A1 WO 2013026611A1
Authority
WO
WIPO (PCT)
Prior art keywords
injector
nozzle
feed interface
fluid
nozzle needle
Prior art date
Application number
PCT/EP2012/063201
Other languages
German (de)
English (en)
Inventor
Henning Kreschel
Kai Sutter
Andreas Rau
Andreas Gruenberger
Wilhelm Christ
Alexander VILLMANN
Matthias Horn
Thomas Schwarz
Wolfgang Stoecklein
Thomas Pauer
Stephan Amelang
Lorenz Zerle
Andreas Rettich
Markus Rueckle
Philipp Wachter
Marco Beier
Sven SIAUW
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 WO2013026611A1 publication Critical patent/WO2013026611A1/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
    • 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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/008—Arrangement of fuel passages inside of injectors
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for

Definitions

  • the invention relates to an injector for a fluid, in particular fuel injector, having at least one holding body and a nozzle module with a nozzle body and a nozzle needle and a supply having fluid supply, which is arranged with a pressure chamber in the region of a nozzle needle tip adjacent to at least one of the nozzle needle controlled injection opening is.
  • Such an injector is known from DE 103 46 242 A1.
  • This injector has three modules, namely a connection body, a holding body and a nozzle body, which are interconnected.
  • the fuel will be used! introduced injector injector fuel introduced into the connector body and guided along a profile groove across the holder body to the nozzle body.
  • the profile groove is guided along a recess for receiving an actuator module.
  • This injector which is shown only schematically, likewise in the form of a fuel injector, consists of a holding body and a nozzle body which, when integrally formed, have a lateral connection for supplying high-pressure fuel.
  • the holding body or the nozzle body For mounting an actuator module and a nozzle needle, the holding body or the nozzle body must have at least one opening in order to be able to assemble said components.
  • the holding body and nozzle be made of a high-strength and correspondingly expensive and elaborate material to be machined.
  • the invention has for its object to provide an injector, which is improved in cost-effective production in terms of its performance.
  • the fluid supply and the feed interface are arranged in a region of the injector excluding the holding body.
  • the holding body is thus very specifically excluded from the inclusion of the fluid supply and / or the Zuzhouitesstelle and the holding body is also in turn in an advantageous development not in contact with the preferably high-pressure medium, which is injected by the injector.
  • the holding body may be made of a less high-strength material, whereby cost advantages in terms of the provision of the material and also the processing of the material can be displayed.
  • the holding body is thus initially designed essentially to carry at least one nozzle body for easy mounting to a component, such as a cylinder head of an internal combustion engine.
  • the holding body for example, a channel for electrical control lines for the actuator module and optionally a low-pressure channel for a medium be embedded.
  • the holding body may be made of a less high-strength material, for example aluminum or conventional steel (St 37).
  • the feed interface is arranged in the nozzle body.
  • This embodiment is particularly advantageous since, in particular when the actuator module directly actuates the nozzle needle, a very rigid system is thus created which allows high injection pressures of significantly more than 1 600 bar to be achieved with the injector without the injection result being affected by, for example soft elastically deforming components is falsified.
  • the nozzle body and the nozzle needle are inherently made of a high strength material. The attachment of the feed interface in addition to the nozzle body is only a small cost not or only slightly in appearance emerging overhead in the production of the nozzle module.
  • the feed interface is arranged in a throttle plate, a valve plate or other on the holding body adjacent to the nozzle module arranged body.
  • the corresponding configuration of the injector is based on the corresponding structure of the injector with regard to the control of the nozzle needle to represent a desired injection. It is thus possible, for example, to use an actuator module to control a valve arranged in a valve plate, which controls the movement of the nozzle needle via a throttle plate with different passages with a control chamber which is arranged on the front side of the nozzle needle in the nozzle body.
  • the nozzle needle opens by an axial displacement at least an injection opening in the nozzle needle tip.
  • the injection opening is thus connected to the adjacent and filled with high pressure fluid pressure chamber and through the at least one injection port, the medium is sprayed.
  • the valve is closed again, flows through a throttle channel in the throttle plate again under high pressure medium in the control chamber and causes a now reversed axial movement of the nozzle needle, which is moved with its nozzle needle tip into a seat and the connection of the at least one injection opening with the Pressure chamber interrupts.
  • the fluid supply into the throttle plate, the valve plate and possibly the other body incorporated in extension of the recessed into the nozzle body fluid supply is preferably introduced, for example, into the throttle plate such that it also connects the feed interface, which is also incorporated into the throttle plate, only with the adjacent nozzle body.
  • the feed interface is preferably arranged laterally on the radial circumference of the injector, that is to say concretely on the nozzle body, the throttle plate, the valve plate or a further installed body.
  • the nozzle body can thereby be formed without additional lateral connecting piece. As a result, the production is further simplified.
  • the feed interface is formed as a pressure port, which in turn cooperates in an advantageous embodiment, the thus formed Zuzhouitesstelle with a lanzenformigen supply.
  • the lanceiform Supply line is pressed into the pressure port and establishes a fluid-tight connection between the components.
  • the feed interface penetrates at least one union nut spanning the nozzle module with the holding body. This embodiment ensures that the supply line interacts directly with the nozzle body (or the throttle plate, the valve plate or the other body) and not an additional component in the form of the union nut is included in the high-pressure system.
  • the injector according to the invention is part of a common-rail injection system for, in particular, a self-igniting internal combustion engine operated with diesel fuel.
  • the medium is then diesel fuel which is injected in a controlled manner by the injector designed as a fuel injector into an associated combustion chamber of the internal combustion engine.
  • the control of the injection with, for example, a pilot injection, a main injection and a post-injection with different amounts of fuel and injection times for a good operating and exhaust behavior of the internal combustion engine is particularly advantageous.
  • the fuel pressure can be increased by the inventive injector at least largely cost-neutral with respect to the cost of the injector to well above previous injection pressures of approximately 1 .600 bar lying pressures.
  • Figure 1 is a representation of the inventively designed injector
  • Figure 2 is an enlarged detail view of a nozzle module, a throttle plate and a valve plate adjacent to a holding body of the injector.
  • the injector shown in Figure 1 is designed as a fuel injector for a common rail injection system for mounting on a self-igniting internal combustion engine.
  • the medium diesel fuel is injected into an associated combustion chamber of the internal combustion engine of the fuel injector.
  • the fuel injector is - as stated - part of a common rail injection system, which consists essentially of a tank, a low pressure pump, a high pressure pump with a metering unit, a high pressure accumulator and the fuel injector, said
  • Components are interconnected in the specified order via corresponding lines.
  • the injector has a holding body 1, which may have a recess (not shown in the figure) for receiving an actuator module.
  • the actuator module is formed as a magnet 1 1, wherein the magnet 1 1 is inserted into a valve plate 5 explained later.
  • the magnet 1 1 is provided with control lines for controlling the magnet 1 1, which are led via a channel in the holding body to a terminal attached to the holding body 1 connector 2.
  • a return connection 3 is arranged at the end-side part of the holding body 1, which is connected via a low-pressure channel in the holding body 1 to a low-pressure region 10 (FIG. 2) of a valve 4 of the injector.
  • the valve 4 is arranged in a valve plate 5 and dominates a drain channel 6 with a discharge throttle 7 in a subsequent throttle plate 8.
  • the valve 4 is actuated by the magnet 1 1, which is integrated in the valve plate 5, in the form that when energized state of the magnet 1 1 of this armature 12 is moved away against the force of a spring 13 of the mouth of the drain channel 6 and thus opens a flow connection from the drain channel 6 in the low-pressure region 10.
  • the magnet 1 1 may also be replaced by an actuator module, which is arranged in the holding body 1.
  • the drainage channel 6 in the throttle plate 8 cooperates with a control chamber 14, which is arranged at the front end to a nozzle needle 15 in a nozzle body 16.
  • the control chamber 14 is connected via a feed channel 17 along a guide sleeve 18 for the nozzle needle 15 and a supply throttle 19 in the guide sleeve 18 with a fluid supply guide 20 in the nozzle body 16.
  • the high-pressure fuel supply 20 opens into a feed interface 21 at the radial periphery of the nozzle body 16.
  • the feed interface 21 is designed as a pressure connection.
  • the pressure port cooperates with a lanzformigen supply, which is arranged in the pressure port through a recess 22 in a union nut 23, which in turn clamps the nozzle body 16, including the throttle plate 8 and the valve plate 5 with the holding body 1.
  • the nozzle needle 15 is axially movable in the nozzle body 16 and closes with a nozzle needle tip 24 spray holes 25 in a nozzle body tip 26.
  • the Fluidzunic- tion 20 is connected via a channel 27 with a pressure chamber 28 in the region of the nozzle needle tip 24 and the nozzle body tip 26. If the nozzle needle 15 is moved axially in the direction of the control chamber 14, a flow connection from the pressure chamber 28 to the spray holes 25 is released and fuel is sprayed through the spray holes 25. If the nozzle needle 15 is again moved in reverse, the spray holes 25 are shut off from the flow connection to the pressure chamber 28 and the injection is terminated.

Abstract

L'invention concerne un injecteur pour un fluide, en particulier un injecteur de carburant, présentant au moins un corps de retenue (1) ainsi qu'un module d'injecteur pourvu d'un corps d'injecteur (16) et d'une aiguille d'injecteur (15) ainsi qu'une alimentation en fluide (20) qui présente une interface d'alimentation (21) et qui est disposée avec une chambre de pression (28) dans la région d'une pointe (24) d'aiguille d'injecteur à côté d'au moins une ouverture d'injection (25) contrôlée par l'aiguille d'injecteur (15). L'invention concerne un injecteur qui présente un comportement de fonctionnement amélioré tout en étant économique à fabriquer. Ce but est atteint du fait que l'alimentation en fluide (20) et l'interface d'alimentation (21) sont disposées dans une région de l'injecteur excluant le corps de retenue (1), à savoir dans le corps d'injecteur (16), dans une plaque d'étranglement (8) ou dans une plaque de soupape (5).
PCT/EP2012/063201 2011-08-25 2012-07-06 Injecteur pour un fluide doté d'une alimentation en fluide WO2013026611A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011081534.1 2011-08-25
DE201110081534 DE102011081534A1 (de) 2011-08-25 2011-08-25 Injektor für ein Fluid

Publications (1)

Publication Number Publication Date
WO2013026611A1 true WO2013026611A1 (fr) 2013-02-28

Family

ID=46456630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/063201 WO2013026611A1 (fr) 2011-08-25 2012-07-06 Injecteur pour un fluide doté d'une alimentation en fluide

Country Status (2)

Country Link
DE (1) DE102011081534A1 (fr)
WO (1) WO2013026611A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2653712A1 (fr) * 2012-04-16 2013-10-23 Robert Bosch GmbH Injecteur de carburant avec électrovanne
JP2016528431A (ja) * 2013-07-22 2016-09-15 デルファイ・インターナショナル・オペレーションズ・ルクセンブルク・エス・アー・エール・エル 噴射装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013212231A1 (de) 2013-06-26 2014-12-31 Robert Bosch Gmbh Kraftstoffinjektor für ein Hochdruckeinspritzsystem
DE102015211417A1 (de) 2015-06-22 2016-12-22 Robert Bosch Gmbh Stecker mit verbesserter Herstellbarkeit durch Spritzgießen
DE102016225936A1 (de) * 2016-12-22 2018-06-28 Continental Automotive Gmbh Zweiteiliger Leckageanschluss
DE102019208007A1 (de) 2019-05-31 2020-12-03 Robert Bosch Gmbh Steckverbindung für einen elektrischen Anschluss eines Kraftstoffinjektors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56550A (en) * 1979-06-15 1981-01-07 Katsunobu Kano Injection nozzle for diesel engine
EP1130249A2 (fr) * 2000-02-29 2001-09-05 Rodi Power Systems, Inc. Soupape d'injection de carburant avec actionneur magnetostrictif
DE10346242A1 (de) 2003-10-06 2005-04-21 Bosch Gmbh Robert Injektorkörper für einen Common Rail Injektor
DE102008055131A1 (de) 2008-12-23 2010-07-01 Robert Bosch Gmbh Piezoaktor, Kraftstoff-Injektor mit Piezoaktor sowie Verfahren zum Herstellen eines Piezoaktors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56550A (en) * 1979-06-15 1981-01-07 Katsunobu Kano Injection nozzle for diesel engine
EP1130249A2 (fr) * 2000-02-29 2001-09-05 Rodi Power Systems, Inc. Soupape d'injection de carburant avec actionneur magnetostrictif
DE10346242A1 (de) 2003-10-06 2005-04-21 Bosch Gmbh Robert Injektorkörper für einen Common Rail Injektor
DE102008055131A1 (de) 2008-12-23 2010-07-01 Robert Bosch Gmbh Piezoaktor, Kraftstoff-Injektor mit Piezoaktor sowie Verfahren zum Herstellen eines Piezoaktors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2653712A1 (fr) * 2012-04-16 2013-10-23 Robert Bosch GmbH Injecteur de carburant avec électrovanne
JP2016528431A (ja) * 2013-07-22 2016-09-15 デルファイ・インターナショナル・オペレーションズ・ルクセンブルク・エス・アー・エール・エル 噴射装置
US10458379B2 (en) 2013-07-22 2019-10-29 Delphi Technologies Ip Limited Injector arrangement

Also Published As

Publication number Publication date
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