WO2015106934A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
WO2015106934A1
WO2015106934A1 PCT/EP2014/078997 EP2014078997W WO2015106934A1 WO 2015106934 A1 WO2015106934 A1 WO 2015106934A1 EP 2014078997 W EP2014078997 W EP 2014078997W WO 2015106934 A1 WO2015106934 A1 WO 2015106934A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel injector
fuel
magnetic
needle
nozzle
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.)
Ceased
Application number
PCT/EP2014/078997
Other languages
German (de)
English (en)
Inventor
Armin Schuelke
Walter Fuchs
Olaf Ohlhafer
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 WO2015106934A1 publication Critical patent/WO2015106934A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/08—Fuel-injection apparatus having special means for influencing magnetic flux, e.g. for shielding or guiding magnetic flux
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members

Definitions

  • the present invention is apparent from a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine according to the species according to the preamble of independent claim 1. More specifically, the present invention relates to a fuel injector having a
  • Magnet actuator for direct actuation of a needle body received in a liftable manner in an inner bore of a nozzle body for opening or closing at least one injection opening, wherein the magnetic actuator has an annular magnetic coil with a as a solenoid plunger
  • FIG. 2 it is known in the field of vehicle technology, for example from DE 10 2011 076 663 A1, to use an actuator arrangement for controlling the lifting movement of a nozzle needle 91 of a rail fuel injector 9, which is used to close off
  • Injection openings 92 is biased against this by a compression spring 93.
  • the high-pressure fuel to be injected is led through a supply line 94 to the injection openings, wherein the control takes place directly.
  • the actuator arrangement provided for the direct control of the nozzle needle 91 has two magnetic actuators 95, 96 which are each arranged in a low-pressure region for better control. The arrangement of the magnetic actuators 95, 96 in the low-pressure region, among other things, their load can be reduced.
  • the magnetic actuators 95, 96 In order to transmit a stroke of the magnetic actuators 95, 96 to the nozzle needle 91, they each act together with a nozzle armature 91 arranged flat armature 97, wherein a alternating energization of the two magnetic actuators 95, 96 causes opening and closing of the nozzle needle 91.
  • a nozzle needle 91 By applying the nozzle needle 91 with the spring force of the spring 93 and the application of the flat armature 97 by a further compression spring 98 in the closing direction, it follows that the closing of the nozzle needle 91 causing
  • Magnetic actuator 96 must have a comparatively low power.
  • a hydraulic coupler can also be used to increase the force in the fuel! be provided 9, so that operation of the fuel! njektors 9 with
  • Injection pressures of up to 2500 bar can be implemented.
  • Such fuel injectors are usually designed for a pressure range of 200 to 2500bar, the injector should be able to inject in the entire pressure range during operation.
  • the present invention provides a fuel injector having the features of claim 1.
  • Advantageous developments of the invention are specified in the subclaims.
  • a nozzle body and a holding body are arranged in the clamping nut, wherein the needle body is received in an inner bore of the nozzle body guided hubbeweglich and is actuated directly by the magnetic actuator, and wherein at least one provided in the nozzle body injection port or nozzle on the
  • Lifting movement of the needle body is releasable or closable.
  • the magnetic actuator comprises one for actuating the needle body in the
  • Holding body arranged magnetic body also referred to as the inner pole, an annular magnetic coil which between the nozzle body and the
  • Holding body is arranged, and acting as an actuator anchor plate, which is arranged on the Ankernadelabêt of the needle body and magnetically cooperates with the magnetic coil.
  • the magnetic body is preferably in a central through hole in the holding body or in a central recess in the holding body, which complements the through hole and expanded in diameter, pressed.
  • An amagnetic seal separates the nozzle body from the support body and seals the coil from a space filled with high pressure fuel.
  • the fuel injector has in its interior a
  • Needle body is completely absorbed.
  • the high-pressure fuel in principle surrounds the entire needle body, apart from the portion of the needle body, which is located within the valve seat and therefore is acted upon only by the pressure present in the combustion chamber. Accordingly, it can be said that the needle body is almost completely received in the high-pressure area.
  • the anchor plate is also completely accommodated in the high-pressure region. Fully absorbed in the high-pressure region here means that the respective component is in operation
  • Fuel injector is completely surrounded by the high-pressure fuel.
  • the here presented fuel injector provides a simplified injector, which is provided in principle for a lower and middle pressure range and works in comparison with other known injectors of the prior art without a hydraulic coupler.
  • the nozzle needle section also referred to as the nozzle needle of the needle body 5
  • the armature plate of the magnet actuator also referred to as a magnet armature, which corresponds to a true direct needle control.
  • the anchor plate is preferably fixedly connected to the needle body at the Ankernadelabites mechanically.
  • the fuel injector according to the invention is preferably able, with the stated structure o, to supply fuel with a lower or medium pressure
  • the latter furthermore has a spring element, preferably a spring or spiral spring, which is referred to as a so-called spring element
  • Return spring serves to bias the needle body against opening of the at least one injection port, so to close the injection port at an inactive magnetic actuator.
  • the spring element is preferably arranged between a so-called spring support component and a spring plate fastened to the needle body, also called a spring plate, the spring support component being a component connected to the nozzle body, to which the needle body can move relatively.
  • the spring plate is preferably pressed onto the needle body, more precisely on the Ankernadelab mustard of the needle body.
  • the spring element 5 is preferably completely received in the high-pressure region, ie
  • the needle body is preferably in a central through hole in the
  • the spring support member may also have a central recess coaxial with the throughbore, whereby the spring support member is given a pot shape with a hole in the bottom forming a U-shape in cross-section.
  • the at the Ankernadelabêt of the needle body attached anchor plate can be arranged open in the fuel injector according to the invention in the recess and be guided radially through the inner circumference of the recess, wherein the remainder of the needle body can be further radially guided through the through hole.
  • the spring plate in
  • a keyhole disc be formed, so in the form of a disc with a keyhole-shaped hole, which is made possible in an assembly of the fuel injector, the assembly consisting of
  • Anchor plate, spring support member, spring element and spring plate firmly assembled, the spring element from the needle tip side of the
  • Injection port sealing seat coming, so is mounted from the end of the needle body on the side of the nozzle needle section. It can already be an at least slight bias of the spring element by the
  • this further comprises a separating member in the form of an amagnetic sealing ring, which is arranged between the nozzle body and the holding body, wherein the magnetic coil between the sealing ring and an inner circumference of the clamping nut, ie radially outside of the sealing ring and thus is arranged radially outside of the magnetic body and the anchor plate and radially within the clamping nut.
  • this magnetic separation serves to ensure that the magnetic flux passes through the armature plate into the inner pole, whereby stray fluxes are avoided.
  • the magnetic coil is through the nozzle body, the
  • Spring support member may be kept clamped in abutment on a part of a side surface of the sealing ring between this and a recess provided in the inner periphery of the nozzle body. Accordingly, the spring element is supported on the non-magnetic sealing ring via the spring support component. This is achieved by a movement of the
  • Anchor plate can be moved by means of the magnetic actuator of the needle body together with the spring plate against the biasing force of the spring element, so that the injection port is released.
  • a fuel feed to the at least one injection opening in the interior of the fuel injector centrally over each other in fluid communication
  • Drilled holes in the magnetic body and the anchor plate More precisely, the fuel supply through the through-hole in the holding body, continues into a preferably central bore in the
  • the previously mentioned holding body through-hole represents in the holding body a central inlet bore, which passes through the holding body and serves to feed fuel.
  • the central arrangement of the inlet bore has the advantage that the holding body evenly from
  • Through hole in the spring support member and the outer diameter of the needle body and between the outer diameter of the spring plate and the inner diameter of the inner bore of the nozzle body may preferably be present in each case a gap that allows passage of the fuel.
  • Injection opening may be performed by an external supply past the magnetic body and the armature plate, for example by respective holes in the holding body and the magnetic body, which are in fluid communication with each other, so that the fuel can penetrate into the high-pressure region.
  • the alternative embodiment can also between a
  • Inner bore of the nozzle body preferably be present in each case a gap that allows passage of the fuel.
  • the injector concept according to the invention provides a simplified fuel! without hydraulic coupler, which is intended for operation in the lower and middle pressure range.
  • Injector concept therefore offers the highest degree of component reduction.
  • the magnet body could also be omitted if the better soft magnetic material can be dispensed with, in which case the
  • Holding body would contain the geometry of the magnetic body in one piece.
  • the elimination of the coupler reduces the necessary for complete Entschrosselung the Düsennadeldichtsitz anchor stroke, thereby eliminating a power transmission or Hubuntera, which should be greater in a Tauchankernier principle than in Flachankerieuxen. For this reason, depending on the application and flat anchor concepts for magnetic actuators are conceivable, in which also the non-magnetic sealing ring could be superfluous.
  • Figure 1 is a sectional view of a portion of a fuel injector according to the preferred embodiment of the invention.
  • Figure 2 shows a sectional view of a fuel! Njektors according to the prior art.
  • Embodiment of the invention which serves for injecting a fuel in a combustion chamber, consists essentially of a clamping nut 1 with an inner bore 11, in which a nozzle body 2 and a holding body 3 is inserted with a central through hole 31 which, for example, with the clamping nut 1 through a screw connection can be connected.
  • a screw connection can be implemented, for example, by a (not shown) internal thread on the inner circumference of the inner bore 11 and a (not shown) corresponding external thread on the outer circumference of the holding body 3.
  • Needle body 4 arranged.
  • the liftably guided in the nozzle body 2 needle body 4 is in the preferred embodiment by a
  • Ankernadelabexcellent 41 and a nozzle needle portion 42 is formed.
  • Lifting movement of the needle body 4 serves to release or closing of injection openings 22 through the nozzle needle portion 42 of the needle body 4, which in the nozzle body 2 at the end of an inner bore 21 of the
  • Nozzle body 2 are formed.
  • Nozzle needle portion 42 on the valve seat separates the inner bore 21 of the nozzle body 2 from the combustion chamber.
  • the seat diameter of the nozzle needle portion 42 of the needle body 4 in the nozzle body 2 and the available magnetic force by the magnetic actuator 5 determine the maximum operating pressure of the
  • Inventive fuel injector Therefore, it is advantageous to minimize the nozzle seat diameter and maximize magnetic force for the highest possible pressure range.
  • the magnetic actuator 5 To actuate the nozzle needle portion 42 of the magnetic actuator 5 is provided, which in addition to the magnetic body 51 comprises an annular magnetic coil 52 o, which cooperates with an actuator acting as an anchor plate 53 which is secured to the Ankernadelabêt 41 of the needle body 4.
  • the anchor plate 53 which consists for example of a magnetic material is positively connected by means of a through hole with the Ankernadelabêt 41 of the needle body 4, wherein the Ankernadelabêt 41 5 in the preferred embodiment has a smaller diameter than that
  • the holding body 3 has an annular end face, which is aligned with the nozzle body 2 out.
  • the annular end face is executed in this embodiment o graded radially outward, with such a radial gradation is not a mandatory execution.
  • the holding body 3 forms in this way, together with the inner circumference of the inner bore 11 of the clamping nut 1, an annular groove in which the magnetic coil 52 is partially received.
  • the magnetic coil 52 is in this embodiment further in a radial groove, which is provided on5 an end face of the nozzle body 2, which to the Holding body 3 is aligned.
  • the groove is designed here stepped radially outward, wherein such a radial gradation is also not a mandatory version.
  • the nozzle body 2 forms in this way together with the inner circumference of the inner bore 11 of the clamping nut 1 an annular groove in which the magnetic coil 52 is partially received. To avoid magnetic leakage flux is between the nozzle body 2 and the
  • annular separator arranged in the form of a sealing ring 8 made of a non-magnetic or non-magnetic material.
  • the sealing ring 8 is held clamped between the end face of the nozzle body 2 and the end face of the holding body 3 such that it is surrounded by the inner circumference of the magnetic coil 52 and this is thus arranged in an annular recess 12 through the inner circumference of the inner bore 11 of the clamping nut. 1 , the nozzle body 2, the holding body 3 and an outer periphery of the sealing ring 8 is formed.
  • the annular recess 12 is thus separated in a fluid-tight manner from a high-pressure region 6, which is present in the interior of the fuel injector, so that the magnetic coil 52 is arranged in a dry, non-fuel impregnated region.
  • the magnetic body 51 is in a recess 32 of the holding body. 3
  • a spring element 7 designed as a spiral spring is further provided, which is clamped between a spring support member 71 and a spring plate 72, wherein the spring plate 72 on the
  • Needle body 4 is pressed.
  • the spring support component 71 is held clamped between a shoulder provided on the inner circumference of the inner bore 21 of the nozzle body 2 and the sealing ring 8, wherein a recess 23 in the inner bore 21 of the nozzle body 2 is formed by the shoulder.
  • the spring support member 71 has a through hole 711 for guiding the needle body 4 and a recess 712 for radially guiding the anchor plate 53.
  • the energization of the solenoid coil 52 is achieved via at least one (not shown) electrical line passing through the holding body.
  • the fuel injector shown is characterized by a precise magnetic performance, which can be dispensed with a return.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur de carburant destiné à injecter du carburant dans la chambre de combustion d'un moteur à combustion interne, cet injecteur comprenant un écrou-raccord (1) dans lequel sont disposés un corps de buse (2) et un corps de maintien (3), un corps d'aiguille (4) qui est composé d'une section d'aiguille d'induit (41) et d'une section d'aiguille de buse (42) et dans lequel est guidé le corps de buse (2), un actionneur magnétique (5) logé dans l'écrou-raccord (1) pour actionner directement le corps d'aiguille (4) logé de manière à pouvoir effectuer une course dans un alésage interne (21) du corps de buse (2), la course du corps d'aiguille permettant d'ouvrir ou de fermer au moins un orifice d'injection (22). L'actionneur magnétique (5) comprend un corps magnétique (51) disposé dans le corps de maintien (3), une bobine d'électro-aimant (52) annulaire disposée entre le corps de buse (2) et le corps de maintien (3), et une plaque d'induit (53) qui agit comme actionneur, est disposée contre la section d'aiguille d'induit (41) et coopère avec la bobine d'électro-aimant (52). L'injecteur de carburant selon l'invention comporte en outre une zone de haute pression (6) dans laquelle est entièrement logée au moins la section d'aiguille d'induit (41) du corps d'aiguille (4).
PCT/EP2014/078997 2014-01-17 2014-12-22 Injecteur de carburant Ceased WO2015106934A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014200771.2 2014-01-17
DE102014200771.2A DE102014200771A1 (de) 2014-01-17 2014-01-17 Kraftstoffinjektor

Publications (1)

Publication Number Publication Date
WO2015106934A1 true WO2015106934A1 (fr) 2015-07-23

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ID=52358747

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/078997 Ceased WO2015106934A1 (fr) 2014-01-17 2014-12-22 Injecteur de carburant

Country Status (2)

Country Link
DE (1) DE102014200771A1 (fr)
WO (1) WO2015106934A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3097302B1 (fr) * 2014-01-20 2019-07-03 Robert Bosch GmbH Injecteur de carburant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114278477B (zh) * 2021-11-22 2023-05-12 启东通润润滑液压设备有限公司 一种双油路喷嘴结构及其喷嘴系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010002646A1 (de) * 2010-03-08 2011-09-08 Robert Bosch Gmbh Kraftstoffinjektor
DE102011089354A1 (de) * 2011-12-21 2013-06-27 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102012220856A1 (de) * 2012-06-29 2014-01-02 Robert Bosch Gmbh Kraftstoffinjektor mit Magnetaktor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011076663A1 (de) 2011-05-30 2012-12-06 Robert Bosch Gmbh Kraftstoffinjektor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010002646A1 (de) * 2010-03-08 2011-09-08 Robert Bosch Gmbh Kraftstoffinjektor
DE102011089354A1 (de) * 2011-12-21 2013-06-27 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102012220856A1 (de) * 2012-06-29 2014-01-02 Robert Bosch Gmbh Kraftstoffinjektor mit Magnetaktor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3097302B1 (fr) * 2014-01-20 2019-07-03 Robert Bosch GmbH Injecteur de carburant

Also Published As

Publication number Publication date
DE102014200771A1 (de) 2015-07-23

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