EP2396536B1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

Info

Publication number
EP2396536B1
EP2396536B1 EP09774677.0A EP09774677A EP2396536B1 EP 2396536 B1 EP2396536 B1 EP 2396536B1 EP 09774677 A EP09774677 A EP 09774677A EP 2396536 B1 EP2396536 B1 EP 2396536B1
Authority
EP
European Patent Office
Prior art keywords
housing
injection valve
valve
sleeve
plastics encapsulation
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.)
Active
Application number
EP09774677.0A
Other languages
German (de)
English (en)
Other versions
EP2396536A1 (fr
Inventor
Ferdinand Reiter
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 EP2396536A1 publication Critical patent/EP2396536A1/fr
Application granted granted Critical
Publication of EP2396536B1 publication Critical patent/EP2396536B1/fr
Active 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
    • 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
    • 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
    • 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
    • F02M2200/9015—Elastomeric or plastic 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9038—Coatings

Definitions

  • the invention is based on an injection valve for the metered spraying of a fluid, in particular fuel, according to the preamble of claim 1.
  • a known fuel injection valve ( DE 197 44 739 A1 and US 2006/0016418 A1 ) comprises a housing composed of a plurality of parts, a part of which is formed by an inlet port with a fuel inlet and a part of a diameter-stepped sleeve.
  • the tubular inlet nozzle dips into the larger diameter sleeve portion of the sleeve and partially into the smaller diameter sleeve portion of the sleeve and carries on its immersion end a solenoid of a valve needle driving electromagnet, with the valve needle fixedly connected armature in the immersed into the smaller diameter sleeve portion end of the inlet nozzle axially slidably guided.
  • the open end of the smaller diameter sleeve portion is terminated by a valve body to which a valve seat surrounding a valve port is formed. With the valve seat acts formed at the end of the valve needle closing head for releasing and closing the valve opening together.
  • the injection chamber is followed by a spray orifice plate.
  • the region of the inlet nozzle projecting out of the sleeve is enclosed by a plastic extrusion which covers the opening of the larger diameter sleeve portion of the sleeve and terminates at a distance from the inlet end of the inlet nozzle.
  • Kunststoffumspritzung a connector for a solenoid coil of the electromagnet is poured.
  • the fuel injection valve is inserted into a valve seat in the cylinder head of an internal combustion engine and sealed by means of two sealing rings against the wall of the valve seat.
  • a lower sealing ring in a on the discharge side, received lower end of the smaller diameter sleeve portion of the sleeve existing annular groove and pushed an upper sealing ring on the protruding from the plastic extrusion, inlet-side upper end of the inlet nozzle.
  • the upper sealing ring presses after installation of the injector in the valve seat on the annular end face of the plastic extrusion.
  • the injection valve according to the invention with the features of claim 1 has the advantage that the additional sealing of the lower attachment point of the plastic extrusion on the housing of the injection valve, an absolute tightness of the injector is ensured in the long term and in the housing interior, e.g. on the solenoid, no corrosion damage.
  • the injector is thus "water-able", i. Insensitive to immersion in water, mud and the like, as required for off-road and commercial vehicles.
  • the additional sealing of the housing is realized by a lower separation point between the housing and Kunststoffumspritzung cross-sealing sleeve, which presses on the one hand on the plastic encapsulation and on the other hand on the housing.
  • Kunststoffumspritzung cross-sealing sleeve which presses on the one hand on the plastic encapsulation and on the other hand on the housing.
  • the plastic extrusion is provided near its upper end with a circumferential outer groove and inserted into the outer groove, a sealing ring for sealing against the valve seat.
  • FIG. 2 in perspective side view and in Fig. 1 injector shown in section is used for example for injecting fuel into a leading to a combustion chamber of an internal combustion engine intake or directly into the combustion chamber of the engine or for metered spraying of another fluid, for example urea-water solutions in exhaust systems of internal combustion engines in order to reduce in the exhaust contained nitrogen oxides.
  • the injection valve has a housing 11, which is composed of three housing parts, namely from an inlet nozzle 12 with inlet opening 121 for the fluid, a valve tube 13, in which the end of the inlet nozzle 12 is immersed, and a pushed onto the valve tube 13 housing sleeve 14th with two different inner diameter sleeve portions 141 and 142.
  • the sleeve portion 141 with the larger inner diameter encloses a seated on the valve tube 13 magnetic coil 15 of an electromagnet for actuating a valve needle arranged in the interior of the valve tube 13.
  • the valve needle is firmly connected in a known manner with a magnet armature of the electromagnet and pressed under the action of a arranged in the valve tube 13 valve closing spring with a closing head on a valve opening surrounding a valve seat of the injector.
  • the sleeve portion 142 of the housing sleeve 14 with the smaller inner diameter is seated in a form-fitting manner on the valve tube 13.
  • the housing 11 is enclosed by a plastic extrusion 16, from which the housing 11 projects axially with its fluid inlet side, upper housing end and its fluidabspritz purposeen, lower housing end.
  • the fluid inlet side, upper housing end is thereby from an end portion of the inlet nozzle 12 and the fluidabspritz workede, lower housing end of a portion of the sleeve portion 141 with the larger inner diameter and the complete Sleeve portion 142 formed with the smaller inner diameter.
  • a connector 20 is cast, the two plug contacts 21 are connected to the winding of the solenoid coil 15.
  • the injection valve is usually used in valve seats 17, 27, as in Fig. 1 excerpts are indicated.
  • the lower valve seat 17 is a bore in the cylinder head of a combustion cylinder of the internal combustion engine and the upper valve seat 27 a bore in a fuel rail which is fixed to the cylinder head.
  • two sealing rings 18, 19 are provided, of which a lower sealing ring 18 in a housing 11, more precisely in the sleeve portion 142 with the smaller inner diameter, recessed annular groove 26 rests and an upper sealing ring 19 sits on the protruding from the plastic extrusion 16 portion of the inlet nozzle 12.
  • a preferably made of an elastomer sealing sleeve 23 is used in the illustrated embodiment, which on the one hand on the plastic extrusion 16 and on the other hand on the housing 11, more precisely on the sleeve portion 141 of the housing sleeve 14 with the larger inner diameter, presses.
  • the plastic extrusion 16 is provided near its upper end with a circumferential outer groove 24 and in the outer groove 24, a sealing ring 25, e.g. an O-ring, inserted, which presses in the valve seat 17 on the inner wall.
  • This sealing ring 25 is of particular advantage when an installation position of the injector is required, in which possibly the inlet opening 121 of the inlet nozzle 12 is spatially below the injection opening of the injector and thus this area in the operation of the motor vehicle also to an increased extent water, mud and the like . is exposed, or operating conditions occur in which the injector completely immersed in water.

Landscapes

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

Claims (3)

  1. Soupape d'injection pour la pulvérisation dosée d'un fluide, en particulier de carburant, comprenant un boîtier (11) et un surmoulage en plastique (16) entourant le boîtier (11), hors duquel le boîtier (11) fait saillie avec une extrémité de boîtier supérieure du côté de l'alimentation en fluide et une extrémité de boîtier inférieure du côté de la pulvérisation de fluide, caractérisée en ce que la zone de séparation (22) du boîtier (11) et du surmoulage en plastique (16) entourant le surmoulage en plastique (16) à l'extrémité inférieure est étanchéifiée du côté extérieur, la zone de séparation (22) étant saisie par le dessus par un manchon d'étanchéité (23) qui s'applique par pression d'une part sur le surmoulage en plastique (16) et d'autre part sur le boîtier (11).
  2. Soupape d'injection selon la revendication 1, caractérisée en ce que le manchon d'étanchéité (23) est fabriqué en élastomère.
  3. Soupape d'injection selon l'une quelconque des revendications 1 à 2, caractérisée en ce que le surmoulage en plastique (16) est pourvu, à proximité de son extrémité supérieure, d'une rainure extérieure périphérique (24) et en ce qu'une bague d'étanchéité (25) est insérée dans la rainure extérieure (24) pour réaliser l'étanchéité vis-à-vis d'un logement de soupape (17).
EP09774677.0A 2009-02-16 2009-12-14 Soupape d'injection Active EP2396536B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009000872.1A DE102009000872B4 (de) 2009-02-16 2009-02-16 Einspritzventil
PCT/EP2009/067106 WO2010091759A1 (fr) 2009-02-16 2009-12-14 Soupape d'injection

Publications (2)

Publication Number Publication Date
EP2396536A1 EP2396536A1 (fr) 2011-12-21
EP2396536B1 true EP2396536B1 (fr) 2014-04-16

Family

ID=41598039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09774677.0A Active EP2396536B1 (fr) 2009-02-16 2009-12-14 Soupape d'injection

Country Status (6)

Country Link
US (1) US9359987B2 (fr)
EP (1) EP2396536B1 (fr)
JP (1) JP5738202B2 (fr)
CN (1) CN102317614B (fr)
DE (1) DE102009000872B4 (fr)
WO (1) WO2010091759A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011006221B4 (de) 2011-03-28 2022-09-29 Robert Bosch Gmbh Ventil für ein strömendes Medium
DE102011081176A1 (de) * 2011-08-18 2013-02-21 Robert Bosch Gmbh Ventil zum Zumessen eines strömenden Mediums
KR101776335B1 (ko) * 2011-12-09 2017-09-08 현대자동차주식회사 Ｃｎｇ 엔진의 독립 연료분사시스템
DE102013201794A1 (de) 2013-02-05 2014-08-07 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
US9366167B2 (en) * 2013-11-08 2016-06-14 Continental Automotive Systems, Inc. Injector water intrusion seal with blow out volume

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908095C2 (de) * 1979-03-02 1984-02-16 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage für Brennkraftmaschinen
DE19744739A1 (de) 1997-10-10 1999-04-15 Bosch Gmbh Robert Brennstoffeinspritzventil
US6065692A (en) * 1999-06-09 2000-05-23 Siemens Automotive Corporation Valve seat subassembly for fuel injector
JP3712589B2 (ja) 2000-03-31 2005-11-02 愛三工業株式会社 インジェクタの応答性調整方法
US6622752B2 (en) * 2000-06-16 2003-09-23 Bosch Automotive Systems Corporation Pressure relief valve
JP3899937B2 (ja) 2002-01-18 2007-03-28 株式会社デンソー 燃料噴射弁
US7258284B2 (en) * 2003-12-19 2007-08-21 Siemens Vdo Automotive Corporation Fuel injector with a metering assembly having a seat molded to a polymeric support member
JP2006057620A (ja) * 2004-07-20 2006-03-02 Aisan Ind Co Ltd 燃料噴射弁及び燃料噴射弁のシール方法
JP3993594B2 (ja) 2004-09-27 2007-10-17 株式会社ケーヒン 電磁式燃料噴射弁
DE102005037319A1 (de) * 2005-08-04 2007-02-08 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005052255B4 (de) * 2005-11-02 2020-12-17 Robert Bosch Gmbh Brennstoffeinspritzventil
US20080006713A1 (en) * 2006-07-06 2008-01-10 Parish James R Fuel injector having an internally mounted cross-flow nozzle for enhanced compressed natural gas jet spray
DE102006042600A1 (de) 2006-09-11 2008-03-27 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil und Verfahren zur Herstellung eines elektromagnetisch betätigbaren Ventils

Also Published As

Publication number Publication date
US9359987B2 (en) 2016-06-07
DE102009000872A1 (de) 2010-08-19
CN102317614B (zh) 2016-04-27
JP5738202B2 (ja) 2015-06-17
DE102009000872B4 (de) 2018-05-30
WO2010091759A1 (fr) 2010-08-19
JP2012517553A (ja) 2012-08-02
EP2396536A1 (fr) 2011-12-21
CN102317614A (zh) 2012-01-11
US20120037727A1 (en) 2012-02-16

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