EP1381771B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1381771B1
EP1381771B1 EP02727225A EP02727225A EP1381771B1 EP 1381771 B1 EP1381771 B1 EP 1381771B1 EP 02727225 A EP02727225 A EP 02727225A EP 02727225 A EP02727225 A EP 02727225A EP 1381771 B1 EP1381771 B1 EP 1381771B1
Authority
EP
European Patent Office
Prior art keywords
sealing ring
fuel injection
injection valve
recess
nozzle 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.)
Expired - Lifetime
Application number
EP02727225A
Other languages
German (de)
English (en)
Other versions
EP1381771A1 (fr
Inventor
Guenther Hohl
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 EP1381771A1 publication Critical patent/EP1381771A1/fr
Application granted granted Critical
Publication of EP1381771B1 publication Critical patent/EP1381771B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting 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
    • 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
    • F02M51/0671—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 the armature having an elongated valve body attached thereto
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • the invention relates to a fuel injection valve according to the preamble of independent claim 1.
  • an electromagnetic fuel injection valve and a suitable attachment structure is known with which for an internal combustion engine with a cylinder injection system, the requirements for the sealing effect, thermal resistance and pressure resistance are met. Particular care is taken in the sealing of the area in the immediate vicinity of the cylinder, in which the electromagnetic fuel injection valve is mounted, as well as on an area further away.
  • a first sealing portion with a first sealing ring which is designed as a corrugated washer, is located at a location close to the cylinder and between the fuel injection valve and the cylinder head.
  • a second sealing portion with a second sealing ring which is also designed as a corrugated washer, positioned at a location which is farther from the cylinder than the first sealing portion.
  • a fuel injection valve for direct injection of fuel into the combustion chamber of a self-igniting internal combustion engine wherein the fuel injection valve has a nozzle body, which is part of a valve housing, and has a sealing ring, the fuel injection valve against a cylinder head of the internal combustion engine seals.
  • the sealing ring is made in two parts, wherein a cylindrical inner sealing element made of plastic is pushed directly onto the nozzle body. On this inner sealing element, an outer ring in the form of a plate spring is attached, which in the deferred state has a steeper angle of attack (Figure 1) and in the tensioned state a much flatter angle of attack ( Figure 2).
  • the ring of a metallic material has two parallel end faces, both of which taper, wherein the oblique, inflow-side end face defines the maximum outer diameter of the ring.
  • the two end faces are externally connected to a likewise conically extending lateral surface, wherein the outer diameter of the ring decreases in the downstream direction.
  • a filter arrangement for a fluid is already known from the document US Pat. No. 3,337,056 A, in which a housing body with an inlet and an outlet can be sealed with differently shaped sealing elements in relation to a housing pot in which a hollow cylindrical filter element is inserted.
  • sealing rings are already provided which have a trapezoidal cross-section with a conically extending outside, wherein in the installed state of the sealing rings assume a substantially rectangular cross-section.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that the sealing ring has an outer conical profile through which the pressure forces during assembly of the equipped with the sealing ring fuel injector can be reduced.
  • the sealing ring on a radial projection over the nozzle body, which increases over the axial length of the sealing ring in the outflow direction.
  • a cylindrical recess on the inner diameter of the sealing ring is formed in the region of the largest projection Ü max , which gives the sealing ring a radial elasticity, whereby the assembly requires significantly lower insertion forces.
  • each formed on the sealing ring and the cylinder head bevel which facilitate the introduction of the fuel injection valve with the mounted sealing ring in a receiving bore of the cylinder head.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is in operative connection with a valve closing body 4, with one on one Valve seat body 5 arranged valve seat surface 6 cooperates to form a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1, which has an injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 'of a magnetic coil 10 and by a sealing ring 34 against the cylinder head of the internal combustion engine not shown in FIG.
  • the sealing ring 34 consists of a preferably coated with Teflon ® material or directly from PTFE, in order to achieve a reliable sealing action.
  • the sealing ring 34 has a conically profiled cross-section, as a result of which a projection 35 of the sealing ring 34 which rises above the nozzle body 2 varies over its axial length. A detailed representation of the sealing ring 34 is shown in the description of FIG. 2.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated by a gap 26 from each other and are based on a connecting member 29 from.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.
  • a second flange 31 is arranged, which serves as a lower anchor stop. He is connected via a weld 33 non-positively with the valve needle 3. Between the armature 20 and the second flange 31, an elastic intermediate ring 32 for damping armature bouncers when closing the fuel injection valve 1 is arranged.
  • the armature 20 and the valve seat body 5 run fuel channels 30a to 30c.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injection valve 1 is sealed by a seal 28 against a distribution line, not shown.
  • the first flange 21 is acted on the valve needle 3 by the return spring 23 counter to its stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing engagement.
  • the armature 20 rests on the intermediate ring 32, which is supported on the second flange 31.
  • this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction.
  • the armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus the valve needle 3 also in the stroke direction with.
  • the valve closing body 4, which is in operative connection with the valve needle 3, lifts off from the valve seat surface 6, as a result of which the fuel conducted via the fuel channels 30a to 30c to the injection opening 7 is hosed down.
  • Fig. 2 shows an excerpted sectional view of the designated in Fig. 1 with II section of the inventively designed fuel injector 1. Matching components are provided with matching reference numerals.
  • the sealing ring 34 is arranged in a groove-shaped, circumferential recess 36 of the nozzle body 2.
  • a ring 37 is provided, which is formed in the recess 36 of the nozzle body 2, protrudes beyond the groove base and engages in a corresponding groove 38 of the sealing ring 34.
  • the sealing ring 34 is conically profiled. This means that the projection 35, which projects radially beyond the nozzle body 2, as already mentioned, varies over the axial length of the sealing ring 34. In this case, the projection 35 is minimal at an inlet-side end face 39 of the sealing ring 34, while the projection 35 is maximum at an outlet-side end face 40 of the sealing ring 34. This is indicated in FIG. 2 by Ü min and Ü max .
  • the sealing ring 34 is provided downstream of the ring 37 with a cylindrical recess 41, whereby the sealing ring 34 is spaced from the groove bottom of the recess 36 in this area, so that it gives the sealing ring 34 a slight radial elasticity.
  • this is advantageous for mounting the sealing ring 34 in the recess 36 of the nozzle body 2, since the diameter of the sealing ring 34 is widened in this area and accordingly the force required to push the sealing ring 34 onto the nozzle body 2 is smaller. Also, the insertion into the recess 36 is simplified.
  • the sealing effect of the inventively designed sealing ring 34 is reliably possible by radial compression. Since the combustion chamber pressure downstream of the sealing ring 34 is greater than the ambient pressure on the inlet side of the sealing ring 34, the sealing ring 34 via a gap 46 between the drain-side end face 40 and the recess 36, which is in communication with the cylindrical recess 41, by the combustion chamber pressure in the radial Widened direction so that the sealing effect is amplified during operation of the fuel injection valve 1.
  • the invention is not limited to the illustrated embodiment and also for other cross-sectional shapes of sealing rings 34 and for any construction of fuel injectors 1, for example, for fuel injectors 1 with connection to a common rail system, applicable.

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)
  • Fuel-Injection Apparatus (AREA)

Claims (7)

  1. Injecteur de carburant (1) pour l'injection directe de carburant, en particulier dans la chambre de combustion d'un moteur à combustion interne à allumage commandé et à compression de mélange, comprenant un boîtier de soupape formé d'un corps d'injecteur (2) et une bague d'étanchéité (34) qui assure une isolation étanche de l'injecteur de carburant (1) par rapport à une culasse (42) du moteur à combustion interne, la bague d'étanchéité (34) étant profilée de manière conique sur l'extérieur et le rayon extérieur de la bague d'étanchéité (34) ainsi qu'une saillie (35) de la bague d'étanchéité (34) dépassant du corps d'injecteur (2) en s'accroissant dans une direction d'écoulement,
    caractérisé en ce que
    la bague d'étanchéité (34) est disposée partiellement dans un évidement (36) du corps d'injecteur (2) et une bague saillante (37), dans l'évidement (36), s'engage dans une rainure (38) de la bague d'étanchéité (34) de telle sorte que la bague d'étanchéité (34) est fixée en direction axiale, et
    la bague d'étanchéité (34) présente en aval de la rainure (38), au niveau de son diamètre intérieur radial, un évidement cylindrique (41).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la saillie (35) est minimale au niveau d'une surface frontale côté arrivée (39) de la bague d'étanchéité (34) et est maximale au niveau d'une surface frontale côté évacuation (40) de la bague d'étanchéité (34).
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la bague d'étanchéité (34), dans la zone de l'évidement cylindrique (41), est située à distance de l'évidement (36) du corps d'injecteur (2).
  4. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    la bague d'étanchéité (34) présente un chanfrein (43) dans la zone de la saillie maximale (Ümax).
  5. Injecteur de carburant selon l'une des revendications 1 à 4,
    caractérisé en ce qu'
    une culasse (42) du moteur à combustion interne présente un chanfrein (44) dans la zone d'une arête (45) d'un alésage de réception pour l'injecteur de carburant (1).
  6. Injecteur de carburant selon la revendication 1 ou 3,
    caractérisé en ce qu'
    entre une surface frontale côté arrivée (40) et l'évidement (36) une fente (46) est en liaison avec l'évidement cylindrique (41).
  7. Injecteur de carburant selon la revendication 6,
    caractérisé en ce que
    la bague d'étanchéité (34) peut être sollicitée par une pression de la chambre de combustion par la fente (46) et l'évidement cylindrique (41).
EP02727225A 2001-03-14 2002-03-14 Soupape d'injection de carburant Expired - Lifetime EP1381771B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10112143 2001-03-14
DE10112143A DE10112143A1 (de) 2001-03-14 2001-03-14 Brennstoffeinspritzventil
PCT/DE2002/000909 WO2002073026A1 (fr) 2001-03-14 2002-03-14 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1381771A1 EP1381771A1 (fr) 2004-01-21
EP1381771B1 true EP1381771B1 (fr) 2007-02-14

Family

ID=7677352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02727225A Expired - Lifetime EP1381771B1 (fr) 2001-03-14 2002-03-14 Soupape d'injection de carburant

Country Status (9)

Country Link
US (1) US6921035B2 (fr)
EP (1) EP1381771B1 (fr)
JP (1) JP2004518873A (fr)
CN (1) CN1459002A (fr)
CZ (1) CZ20023670A3 (fr)
DE (2) DE10112143A1 (fr)
ES (1) ES2280534T3 (fr)
RU (1) RU2003129063A (fr)
WO (1) WO2002073026A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007008292B4 (de) 2007-02-16 2009-08-13 Siemens Ag Vorrichtung und Verfahren zur In-Situ-Gewinnung einer kohlenwasserstoffhaltigen Substanz unter Herabsetzung deren Viskosität aus einer unterirdischen Lagerstätte
DE102007034611A1 (de) * 2007-07-25 2009-01-29 Robert Bosch Gmbh Vorrichtung zur Befestigung von Kraftstoffinjektoren
GB0723785D0 (en) * 2007-12-05 2008-01-16 Delphi Tech Inc Compression sleeve for internal combustion engine components
EP2148082B1 (fr) * 2008-07-24 2011-10-19 Continental Automotive GmbH Arrangement de couplage pour une soupape d'injection et soupape d'injection
JP2011064124A (ja) * 2009-09-17 2011-03-31 Hitachi Automotive Systems Ltd 燃料噴射弁
DE102009045692A1 (de) * 2009-10-14 2011-04-21 Robert Bosch Gmbh Verfahren zur Montage eines Dichtungsrings
JP2013072298A (ja) * 2011-09-27 2013-04-22 Hitachi Automotive Systems Ltd 燃料噴射弁
EP2607679B1 (fr) 2011-12-21 2015-02-25 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
JP5831510B2 (ja) 2012-11-20 2015-12-09 株式会社デンソー 燃料噴射弁および燃料噴射弁の取付方法
JP5910586B2 (ja) 2013-08-23 2016-04-27 株式会社デンソー 燃料噴射弁
CN106584089B (zh) * 2016-12-05 2019-07-26 蚌埠市国乐汽配有限公司 一种机油冷却器连接管密封垫安装方法
DE102017216147A1 (de) 2017-09-13 2019-03-14 Robert Bosch Gmbh Kraftstoffinjektor
DE102017216157A1 (de) 2017-09-13 2019-03-14 Robert Bosch Gmbh Kraftstoffinjektoranordnung und ein Verfahren zum Einführen eines Kraftstoffinjektors in eine Aufnahmeöffnung eines Zylinderkopfs
DE102017216150A1 (de) 2017-09-13 2019-03-14 Robert Bosch Gmbh Kraftstoffinjektor
DE102017216153A1 (de) 2017-09-13 2019-03-14 Robert Bosch Gmbh Kraftstoffinjektor
US11174825B2 (en) * 2019-02-11 2021-11-16 Caterpillar Inc. Seal configuration for fuel injector

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US3337056A (en) * 1963-01-28 1967-08-22 Tecalemit Engineering Fluid filter gaskets
US4938193A (en) * 1987-06-15 1990-07-03 Stanadyne Automotive Corp. Fuel injection nozzle

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US3797835A (en) * 1972-04-21 1974-03-19 Armco Steel Corp High pressure joint and sealing ring therefor
DE2614703C3 (de) 1976-04-06 1981-04-23 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Vorrichtung zur Befestigung einer Kraftstoffeinspritzdüse
DE2824476C2 (de) 1978-06-03 1983-03-17 Bayerische Motoren Werke AG, 8000 München Brennstoffeinspritzdüsenbefestigung an einer Brennkraftmaschine
GB2042652B (en) * 1979-02-21 1983-07-20 Rolls Royce Joint making packing
SU1121479A1 (ru) 1983-06-21 1984-10-30 Центральный Научно-Исследовательский И Конструкторский Институт Топливной Аппаратуры Автотракторных И Стационарных Двигателей Устройство дл установки форсунки
DE4003228A1 (de) * 1990-02-03 1991-08-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
US5544816A (en) * 1994-08-18 1996-08-13 Siemens Automotive L.P. Housing for coil of solenoid-operated fuel injector
JPH08200182A (ja) 1995-01-25 1996-08-06 Zexel Corp 電磁式燃料噴射弁およびその取付け構造
US5692723A (en) * 1995-06-06 1997-12-02 Sagem-Lucas, Inc. Electromagnetically actuated disc-type valve
DE19813020A1 (de) * 1998-03-25 1999-09-30 Bosch Gmbh Robert Brennstoffeinspritzventil
JP3757307B2 (ja) 1998-11-06 2006-03-22 株式会社ケーヒン 燃料噴射装置のスロットルボデー
JP2000220555A (ja) 1999-01-29 2000-08-08 Isuzu Motors Ltd 燃料噴射ノズルの取付構造

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Publication number Priority date Publication date Assignee Title
US3337056A (en) * 1963-01-28 1967-08-22 Tecalemit Engineering Fluid filter gaskets
US4938193A (en) * 1987-06-15 1990-07-03 Stanadyne Automotive Corp. Fuel injection nozzle

Also Published As

Publication number Publication date
DE50209488D1 (de) 2007-03-29
RU2003129063A (ru) 2005-03-27
US6921035B2 (en) 2005-07-26
CN1459002A (zh) 2003-11-26
CZ20023670A3 (en) 2004-05-12
JP2004518873A (ja) 2004-06-24
ES2280534T3 (es) 2007-09-16
EP1381771A1 (fr) 2004-01-21
WO2002073026A1 (fr) 2002-09-19
US20030168534A1 (en) 2003-09-11
DE10112143A1 (de) 2002-09-19

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