WO2007012433A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
WO2007012433A1
WO2007012433A1 PCT/EP2006/007187 EP2006007187W WO2007012433A1 WO 2007012433 A1 WO2007012433 A1 WO 2007012433A1 EP 2006007187 W EP2006007187 W EP 2006007187W WO 2007012433 A1 WO2007012433 A1 WO 2007012433A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
fuel injector
injector according
bushing
fuel
Prior art date
Application number
PCT/EP2006/007187
Other languages
German (de)
English (en)
Inventor
Ricardo Cadavid-Giraldo
Anton Kerckhoff
Stefan Kleiber
Hans-Joachim Koch
Wolfgang Scheibe
Ralph Wilding
Thomas Ziegler
Original Assignee
L'orange 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 L'orange Gmbh filed Critical L'orange Gmbh
Priority to DE502006003278T priority Critical patent/DE502006003278D1/de
Priority to JP2008523192A priority patent/JP4869345B2/ja
Priority to EP06762739A priority patent/EP1907689B1/fr
Publication of WO2007012433A1 publication Critical patent/WO2007012433A1/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
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • 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
    • 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
    • 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
    • F02M2200/27—Fuel-injection apparatus with filters
    • 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
    • F02M2200/90—Selection of particular materials
    • 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

Definitions

  • the invention relates to a fuel injector for injecting in a fuel storage under high pressure held fuel into the combustion chamber of an internal combustion engine according to the preamble of claim 1.
  • a main channel leads from the injector to the injection nozzle, a second channel branches off at a suitable location from the main channel and leads to a servo valve, with which the control pressure of the control chamber is switched in the sense of opening and closing the nozzle needle.
  • the fuel always contains particles up to a certain size. Therefore, in many known injectors on the input side filters or other construction elements are provided which retain particles above a harmful for the injector size.
  • the control valves provided for controlling the injectors are intended to convert the supplied electrical control signal into a change of the control pressure as quickly as possible, the better the response of the valves, the better.
  • An increase in the switching speed is achieved inter alia by a reduction in the stroke of the valve actuator, which of course means that particles that are larger than the hub, can not pass through the valve gap and pinch in the valve gap and thereby interfere with the function of the valve.
  • the flow resistance increases with a correspondingly increasing deterioration of the hydraulic characteristics of the injector.
  • WO 01/11222 A1 discloses a fuel injector for injecting fuel stored in a fuel reservoir under high pressure into the combustion chamber of an internal combustion engine, comprising an injector housing, a nozzle needle arranged to be longitudinally displaceable in the housing and an injection nozzle which can be optionally opened by the nozzle needle. by the fuel in the combustion chamber of the internal combustion engine can be injected bar contains.
  • a control chamber which cooperates with the nozzle needle in the sense of an optional opening and closing of the injection nozzle and is acted upon by the fuel pressure, is delimited by a bush surrounding the nozzle needle, which is surrounded by the supplied fuel and releases an inlet channel leading to the control chamber. From EP 0957262 A2 and DE 100 37 388 Al each filter arranged in the inlet to the control chamber of a Kraftstoffinj are known per se.
  • the object of the invention is to provide an improved fuel injector of the presumed kind.
  • a fuel injector is to be created which rather, is largely insensitive to foreign body particles contained in the fuel supplied.
  • the object is achieved by a fuel injector with the shopping ⁇ paint of claim 1.
  • the invention provides a fuel injector for internal combustion engines, which has in a nozzle body an axial, flowed through by the fuel bore.
  • the bore receives a nozzle needle in the axially displaceable guided nozzle needle, which has at its one end a seat in the nozzle body, and carries at its other end a seated on the circumference of the nozzle needle, relative to the nozzle needle displaceable sleeve.
  • the sleeve is adjacent, resiliently supported on the nozzle needle, in abutment against an axially adjacent to the nozzle body component of Kraftstoffinj ector a control chamber from which is connected via an inlet channel in the socket with the fuel-flow space on the outside of the socket in conjunction, and the one Having controlled by a control valve drain channel.
  • a filter is provided on the bushing for filtering the fuel flowing through the inlet channel to the control chamber.
  • a significant advantage of the invention is that the control circuit is reliably protected from particles of very small size, while the flow in the main channel to the injection nozzle, which is significantly less sensitive to larger particles, remains substantially unimpaired.
  • the filter is provided on the circumference of the bushing.
  • the filter surrounding the circumference of the sleeve is annular.
  • the filter is designed in the form of the lateral surface of a circular cylinder.
  • the sleeve is formed with two sections with different circumferences and the filter is disposed on the smaller, recessed diameter of the bushing.
  • the bushing in the region of a control-end-side section is retracted to the edge in relation to a section facing away from the control space, and the difference in diameter forms a radial step for the end-face contact of the filter.
  • the recessed diameter forms a filter receiving recess in the form of a circumferential annular groove with two radial steps.
  • a recess receiving the fuel flow passing through the filter is also formed on the bushing within the filter.
  • the recess is formed in the form of a circumferential annular groove.
  • the inlet channel leading to the control chamber contains an inflow throttle limiting the inflow.
  • the inlet channel leading to the control chamber contains an antechamber collecting the inflow.
  • the leading to the control chamber inlet channel is formed in the socket.
  • the supply channel leading to the control chamber is formed in the shaft of the nozzle needle.
  • the filter may be formed by a wire mesh filter or a wire mesh.
  • the filter may be formed by a fabric laminate.
  • the filter may be formed by a sintered material.
  • the filter may be formed by a gap filter.
  • the filter may be formed by a filter with holes, in particular circular, elliptical or polygonal holes.
  • the filter is attached to the socket by welding.
  • the filter is located in the Kraftstoffström injected and thus is self-cleaning.
  • the fuel injector according to the invention will be explained with reference to the drawing.
  • Figure 1 is a partial cross-sectional view of a fuel injector according to a first embodiment of the invention
  • Figure 2 is a view of a detail A of Figure 1 and
  • FIG. 3 shows a variant embodiment in a detail view corresponding to FIG. 2.
  • FIG. 1 shows a part of a fuel injector which is provided for injecting fuel stored under high pressure in a fuel accumulator (common rail), not shown.
  • the fuel injector comprises an injector housing, which is shown only partially, with a nozzle body 7, in which a nozzle needle 6 is arranged to be guided in a longitudinally displaceable manner. This is in cooperation with a provided at its one end seat in the nozzle body 7 an injector 13 for injecting the fuel optionally free.
  • the fuel stored in the fuel reservoir under high pressure is supplied to the tip of the nozzle needle 6 in a ring-shaped surrounding nozzle leading chamber 14 via a in the form of an axially extending in the nozzle body 7 bore 8 high-pressure channel.
  • the nozzle needle 6 is guided longitudinally displaceably in the axial bore 8.
  • the nozzle needle 6 carries at its other end a seated on its periphery, relative to the nozzle needle 6 slidable bushing 1.
  • the bushing 1 is resiliently on the nozzle needle 6 till- supports and abuts in plant against an axially adjacent to the Düsenkör ⁇ per 7 component of Kraftstoffinj injector from a control chamber 10 from which is connected via an inlet channel 2, 9 in the socket 1 with the fuel-flow space on the outside of the socket 1 in conjunction.
  • control chamber 10 is acted upon by the fuel supplied at high pressure and selectively depressurized by means of a control valve not shown in the figure via an outlet throttle 4 in the sense of opening the injector 13.
  • control chamber 10 is bounded circumferentially by the bush 1 surrounding the nozzle needle 6 and tightly against it, which is surrounded by the fuel supplied via the high-pressure bore 8 ,
  • the bush 1 is the leading to the control chamber 10, an inlet throttle 2 containing inlet channel 2, 9 free.
  • a filter 3 for filtering the fuel to be supplied to the control chamber 10 is provided, which is annularly formed surrounding the circumference of the bushing 1 and has the shape of the lateral surface of a circular cylinder.
  • the outer periphery of the sleeve 1 is withdrawn to receive the filter 3.
  • the recessed diameter 11 forms a circumferential annular groove in which the filter 3 is located between two radial stages of the groove.
  • the withdrawn diameter 11 extends on a part of the sleeve to the upper end of the bushing 1, which has the mounting advantage that the filter 3 from above on the bushing 1 until it stops at a lower, formed by the diameter withdrawal, Radial stage can be pushed.
  • the filter 3, preferably a wire mesh, can be formed separately from the socket 1 as a tissue cylinder.
  • the bushing 1 is spot-welded circumferentially with the tissue cylinder.
  • a recess which passes through the filter 3 and receives a fuel flow formed in the form of a circumferential annular groove 12 is provided.
  • the inlet channel leading to the control chamber 10 contains the previously mentioned inflow restrictor 2 delimiting the inflow, and an antechamber 9 collecting the inflow at the transition from the groove 12 to the inflow throttle 2.
  • the inflow throttle 2 opening into the control chamber is directed such that the mouth can not come to lie directly below the outlet throttle 4. Accordingly, the nozzle needle 6 is slightly withdrawn at the upper end in the scope.
  • the leading to the control chamber 10 inlet channel 2, 9 is formed in the socket 1.
  • the supply channel leading to the control chamber 10 may also be formed in the shaft of the nozzle needle 6.
  • the socket 1 would have a corresponding, the access to the inlet channel releasing recess.
  • the filter 3 may be formed by a cylindrical wire mesh or wire mesh having circumferentially and longitudinally extending wires.
  • the longitudinal, ie, extending coaxially to the bushing wires are thicker to ensure sufficient strength. So that the wires can not move, the wire mesh should be sintered.
  • the filter 3 may be formed by a fabric laminate or a sintered material.
  • the filter 3 may be formed by a slit filter or a filter having holes, in particular circular, elliptical or polygonal holes.
  • the filter 3 is self-cleaning. Due to the fuel flowing past in the high-pressure bore 8 on the outside of the filter 3 deposited particles are entrained there and in a manner not harmful to the fuel injector (and also for the internal combustion engine) by injection together with the fuel through the injector 13 into the combustion chamber of the internal combustion engine eliminated. Thus, a maintenance of the filter 3 is not required.

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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un injecteur de carburant pour des moteurs à combustion interne. Cet injecteur comprend un alésage axial (8) traversé par le carburant, qui se trouve dans un corps d'injecteur (7) et qui reçoit une aiguille d'injecteur (6) guidée coulissante en direction axiale dans le corps d'injecteur (7). L'aiguille d'injecteur (6) présente à une extrémité une surface de siège dans le corps d'injecteur et porte à son autre extrémité une douille (1) qui repose sur la périphérie de l'aiguille d'injecteur (6) et qui peut se déplacer par rapport à cette aiguille d'injecteur (6). Cette douille (1), appuyée de manière flexible sur l'aiguille d'injecteur (6), délimite une chambre de commande (10), en appui contre un composant de l'injecteur de carburant qui est adjacent au corps d'injecteur (7) dans la direction axiale. Cette chambre de commande communique avec l'espace entouré de carburant sur la face externe de la douille (1), par l'intermédiaire d'un canal d'alimentation (2, 9) dans la douille (1), et présente un canal d'évacuation qui est commandé par une soupape de commande. Selon cette invention, un filtre (3) est prévu sur la douille (1). Ce filtre est conçu pour filtrer le carburant qui circule par l'intermédiaire du canal d'alimentation (2, 9) jusqu'à la chambre de commande.
PCT/EP2006/007187 2005-07-28 2006-07-21 Injecteur de carburant WO2007012433A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE502006003278T DE502006003278D1 (de) 2005-07-28 2006-07-21 Kraftstoffinjektor
JP2008523192A JP4869345B2 (ja) 2005-07-28 2006-07-21 燃料噴射器
EP06762739A EP1907689B1 (fr) 2005-07-28 2006-07-21 Injecteur de carburant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005035347A DE102005035347B3 (de) 2005-07-28 2005-07-28 Kraftstoffinjektor
DE102005035347.9 2005-07-28

Publications (1)

Publication Number Publication Date
WO2007012433A1 true WO2007012433A1 (fr) 2007-02-01

Family

ID=36709981

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/007187 WO2007012433A1 (fr) 2005-07-28 2006-07-21 Injecteur de carburant

Country Status (6)

Country Link
EP (1) EP1907689B1 (fr)
JP (1) JP4869345B2 (fr)
KR (1) KR101029214B1 (fr)
AT (1) ATE426741T1 (fr)
DE (2) DE102005035347B3 (fr)
WO (1) WO2007012433A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150136088A1 (en) * 2013-11-20 2015-05-21 Stanadyne Corporation Debris Diverter Shield For Fuel Injector

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2092186B1 (fr) * 2006-10-16 2010-01-20 Ganser-Hydromag Ag Soupape d'injection de carburant pour moteurs à combustion interne
DE102007029793A1 (de) 2007-06-27 2008-07-17 L'orange Gmbh Kraftstoffinjektor
DE102008041730A1 (de) * 2008-09-01 2010-03-04 Robert Bosch Gmbh Injektor mit einem vor der Zulaufdrossel angeordneten Partikelfilter
CN101592106B (zh) * 2009-04-24 2013-10-30 靳北彪 发动机用有孔阀片形变燃油喷射器
DE102011016168B4 (de) 2011-04-05 2015-02-12 L'orange Gmbh Kraftstoffinjektor für eine Brennkraftmaschine
DE102011053113B4 (de) 2011-08-30 2017-06-29 L'orange Gmbh Filteranordnung, insbesondere für Kraftstoffinjektoren
DE102011086339A1 (de) * 2011-11-15 2013-05-16 Robert Bosch Gmbh Kraftstoffinjektor, insbesondere Common-Rail-Injektor
EP2940287A1 (fr) * 2014-05-01 2015-11-04 Delphi International Operations Luxembourg S.à r.l. Filtre d'injecteur de carburant
EP2940286A1 (fr) * 2014-05-01 2015-11-04 Delphi International Operations Luxembourg S.à r.l. Filtre d'injecteur de carburant
FR3051229B1 (fr) * 2016-05-13 2021-02-19 Delphi Int Operations Luxembourg Sarl Injecteur de carburant pour moteur a combustion interne
CN106762289A (zh) * 2017-01-18 2017-05-31 哈尔滨工程大学 蓄压孔板式电控喷油器
CN106593722A (zh) * 2017-01-18 2017-04-26 哈尔滨工程大学 一种带有刻沟的谐振孔板式电控喷油器
US10704444B2 (en) 2018-08-21 2020-07-07 Tenneco Automotive Operating Company Inc. Injector fluid filter with upper and lower lip seal
DE102018221604A1 (de) * 2018-12-13 2020-06-18 Robert Bosch Gmbh Kraftstoffinjektor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06173810A (ja) * 1992-12-09 1994-06-21 Nippondenso Co Ltd 燃料噴射装置
EP0957262A2 (fr) 1998-05-13 1999-11-17 LUCAS INDUSTRIES public limited company Injecteur de combustible
WO2001011222A1 (fr) 1999-08-04 2001-02-15 Robert Bosch Gmbh Injecteur a rampe commune
DE10037388A1 (de) 2000-08-01 2002-02-21 Bosch Gmbh Robert Ventilanordnung, insbesondere für ein Kraftstoffeinspritzsystem einer Verbrennungsmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06173810A (ja) * 1992-12-09 1994-06-21 Nippondenso Co Ltd 燃料噴射装置
EP0957262A2 (fr) 1998-05-13 1999-11-17 LUCAS INDUSTRIES public limited company Injecteur de combustible
WO2001011222A1 (fr) 1999-08-04 2001-02-15 Robert Bosch Gmbh Injecteur a rampe commune
DE10037388A1 (de) 2000-08-01 2002-02-21 Bosch Gmbh Robert Ventilanordnung, insbesondere für ein Kraftstoffeinspritzsystem einer Verbrennungsmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150136088A1 (en) * 2013-11-20 2015-05-21 Stanadyne Corporation Debris Diverter Shield For Fuel Injector
EP2876295A1 (fr) * 2013-11-20 2015-05-27 Stanadyne Corporation Injecteur de carburant avec une protection contre les débris
US9644589B2 (en) * 2013-11-20 2017-05-09 Stanadyne Llc Debris diverter shield for fuel injector

Also Published As

Publication number Publication date
ATE426741T1 (de) 2009-04-15
EP1907689B1 (fr) 2009-03-25
KR101029214B1 (ko) 2011-04-12
DE102005035347B3 (de) 2006-08-10
JP2009503325A (ja) 2009-01-29
KR20080034908A (ko) 2008-04-22
DE502006003278D1 (de) 2009-05-07
JP4869345B2 (ja) 2012-02-08
EP1907689A1 (fr) 2008-04-09

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