EP1658428B8 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1658428B8
EP1658428B8 EP04766521A EP04766521A EP1658428B8 EP 1658428 B8 EP1658428 B8 EP 1658428B8 EP 04766521 A EP04766521 A EP 04766521A EP 04766521 A EP04766521 A EP 04766521A EP 1658428 B8 EP1658428 B8 EP 1658428B8
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
seal
valve according
fuel
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.)
Not-in-force
Application number
EP04766521A
Other languages
German (de)
English (en)
Other versions
EP1658428B1 (fr
EP1658428A1 (fr
Inventor
Gernot Wuerfel
Detlef Nowak
Andreas Mlejnek
Klaus Roessler
Guenter Hoenig
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
Mercedes Benz Group AG
Original Assignee
Robert Bosch GmbH
Daimler AG
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, Daimler AG filed Critical Robert Bosch GmbH
Publication of EP1658428A1 publication Critical patent/EP1658428A1/fr
Publication of EP1658428B1 publication Critical patent/EP1658428B1/fr
Application granted granted Critical
Publication of EP1658428B8 publication Critical patent/EP1658428B8/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M61/14—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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • EP 0 828 075 A1 discloses a fuel injection valve for the direct injection of fuel into the combustion chamber of an internal combustion engine, which has a device for temperature adjustment in this area in order to reduce deposits in the area of the valve tip.
  • the device is designed in the form of a coating of a thermally conductive material on the valve tip.
  • a fuel injection valve for the direct injection of fuel into the combustion chamber of a mixture-compressing, spark-ignition internal combustion engine. It comprises a valve housing formed from a nozzle body and a sealing ring which seals the fuel injector against one Seals the cylinder head of the internal combustion engine.
  • the sealing ring has a convexly curved profile, with two ends of the sealing ring overlapping axially in a step-like manner.
  • a disadvantage of the fuel injector known from DE 101 09 407 AI is in particular the air gap present between the fuel injector and the cylinder head, which allows only a reduced heat transfer. This is disadvantageous for reducing deposits on the valve tip, since the temperature in the area of the spray openings must be as low as possible in order to avoid deposits.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that a seal extending over the entire axial length and provided with a suitable structure is provided between the cylinder head and the nozzle body, which on the one hand has a reliable sealing effect and on the other hand an effective heat dissipation from Nozzle body allows.
  • the seal can also be constructed from several layers, which gives it greater stability and less susceptibility to damage during assembly.
  • a cover plate can be attached to an outflow end of the seal, which fulfills the function of a heat shield.
  • the cover plate can have an opening for the sprayed fuel jets or a plurality of spray openings.
  • the seal is advantageously made of a metallic material with an amorphous structure, as a result of which a smooth surface can be achieved.
  • Fig. 1 shows a schematic. Section through a fuel injection valve according to the prior art
  • FIG. 2 shows a schematic, partially sectioned view of a first exemplary embodiment of a fuel injector according to the invention
  • FIG. 3 shows a schematic, partially sectioned view of a second exemplary embodiment of a fuel injector according to the invention
  • FIG. 4 shows a schematic, partially sectioned view of a third exemplary embodiment of a fuel injector according to the invention
  • FIG. 5 shows a schematic, partially sectional view of a fourth exemplary embodiment of a fuel injector according to the invention
  • Fig. 6 is a schematic, partially sectioned view of a fifth embodiment of a fuel injector according to the invention
  • Fig. 7 is a schematic, partially sectioned view of a sixth embodiment of a fuel injector according to the invention.
  • the fuel injector 1 is in the form of a fuel injector for fuel injection systems of mixed compression, spark-ignited
  • Fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber 2 of an internal combustion engine.
  • the fuel injection valve 1 comprises a nozzle body 3, which is sealed by a sealing ring 4 against a cylinder head 5 of the internal combustion engine.
  • the sealing ring 4 is made, for example, of an elastomer, e.g. B. made of a Teflon-coated material and ensures a sealing effect in the cylinder head 5 by a slightly larger diameter compared to the nozzle body 3.
  • the fuel injector 1 further comprises a housing ⁇ , an electrical plug contact 7 for actuating the fuel injector 1 and a fuel inlet 8, via which the fuel is supplied.
  • the supply of the fuel can take place, for example, by means of a fuel distributor line, not shown.
  • a disadvantage of the sealing rings 4 known from the prior art is in particular the poor heat transfer between the nozzle body 3 and the cylinder head 5 due to an air gap 9 present on the downstream side between the fuel injection valve 1 and the cylinder head 5 to counteract coking of the spray openings, the lowest possible temperature in the area of the valve tip is desirable. This counteracts complete evaporation of the fuel remaining in the region of the valve tip after the injection process. If the fuel remains liquid, the combustion residues and contaminants cannot deposit in the area of the valve tip and are removed during the next injection cycle.
  • the seals 10 described below have in common that they have a corrugated tube design and thus on the one hand offer a good sealing effect and on the other hand offer a sufficiently large contact surface for effective heat transfer between the fuel injection valve 1 and the cylinder head 5.
  • the seals 10 are designed so that they are short and wide when not installed and are compressed somewhat by the installation and thus elongated. This allows a very good fit to be achieved.
  • the seals 10 are made of a highly thermally conductive material such.
  • Exemplary embodiments of fuel injection valves 1 equipped with corresponding seals 10 are described below by way of example. With the exception of the measures according to the invention, the fuel injection valves 1 can be configured similarly to the fuel injection valve 1 shown in FIG. 1.
  • FIG. 2 shows a first exemplary embodiment of a fuel injector 1 designed according to the invention.
  • the seal 10 is designed in the simplest manner in the form of a corrugated tube.
  • the seal 10 is open at both ends and can therefore be installed particularly easily.
  • the seal 10 can be preassembled on the nozzle body 3 of the fuel injection valve 1 and then used together with the latter in the cylinder head 5.
  • the seal 10 is designed in the form of a tubular seal 10 with protuberances 11.
  • the protuberances 11 are approximately semi-circular in section.
  • the advantage of this variant is a somewhat larger contact surface on the nozzle body 3 with an improved thermal conductivity.
  • FIG. 4 shows a third exemplary embodiment of a fuel injection valve 1 designed according to the invention.
  • the seal 10 is designed to be pleated and shaped into a bellows 10.
  • the thermal conductivity and sealing ability correspond approximately to the first exemplary embodiment described in FIG. 2.
  • the seal 10 is constructed from several layers 12 in a sandwich process. This increases in particular the durability of the seal 10, which cannot warp so easily during assembly and is therefore less susceptible to damage.
  • the individual layers 12 can in turn each have a corrugated tube shape and be glued to one another or only connected to one another at their ends.
  • FIG. 6 shows a fifth exemplary embodiment of a fuel injector 1 designed according to the invention.
  • the seal 10 can here in section like that
  • Embodiments can be designed, wherein in Fig. 6
  • Corrugated tube shape was selected, and is additionally provided at a downstream end 13 with a cover plate 14, which has an opening 15 for at least one
  • Combustion chamber 2 has injected fuel jets.
  • Cover plate 14 also has the function of a heat shield and protects the spray openings from the im
  • FIG. 7 shows a sixth exemplary embodiment of a fuel injection valve 1 designed according to the invention.
  • the seal 10 can here as in the embodiment shown in Fig. 6 in section like that
  • Embodiments can be designed, the corrugated tube shape was also selected in Fig. 7.
  • the seal 10 is also at an outflow end 13 with a
  • cover plate 14 in which the spray openings can be incorporated directly.
  • the cover plate 14 also performs the function of a heat shield and protects the downstream end of the
  • Fuel injector 1 before the temperature prevailing in the combustion chamber is not limited to the exemplary embodiments shown and can also be used for other cross-sectional shapes of seals 10 and for any construction of fuel injection valves 1, for example for fuel injection valves 1 with a connection to an intake manifold or a common rail system.
  • the individual features of the different exemplary embodiments can be combined with one another as desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

Soupape d'injection (1) de carburant, en particulier pour l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne à mélange comprimé et à allumage commandé. Ladite soupape comporte un boîtier formé par un corps (3) de buse ainsi qu'un élément d'étanchéité (10) qui étanchéifie la soupape d'injection (1 ) de carburant par rapport à une culasse (5) de cylindre du moteur à combustion interne. L'élément d'étanchéité (10) possède une forme de manchon à section transversale structurée et s'étend sur la longueur axiale du corps (3) de buse.
EP04766521A 2003-08-18 2004-08-18 Soupape d'injection de carburant Not-in-force EP1658428B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10337892A DE10337892A1 (de) 2003-08-18 2003-08-18 Brennstoffeinspritzventil
PCT/EP2004/051820 WO2005019640A1 (fr) 2003-08-18 2004-08-18 Soupape d'injection de carburant

Publications (3)

Publication Number Publication Date
EP1658428A1 EP1658428A1 (fr) 2006-05-24
EP1658428B1 EP1658428B1 (fr) 2007-11-14
EP1658428B8 true EP1658428B8 (fr) 2008-01-23

Family

ID=34201626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04766521A Not-in-force EP1658428B8 (fr) 2003-08-18 2004-08-18 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US7261089B2 (fr)
EP (1) EP1658428B8 (fr)
JP (1) JP4537398B2 (fr)
DE (2) DE10337892A1 (fr)
WO (1) WO2005019640A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10354465B4 (de) * 2003-11-21 2014-07-17 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005006641A1 (de) * 2005-02-14 2006-08-24 Siemens Ag Einspritzventil zum Einspritzen von Kraftstoff und Zylinderkopf
DE102006009094A1 (de) * 2006-02-28 2007-08-30 Bayerische Motoren Werke Ag Dämpfungseinrichtung und Dämpfungselement
US7334571B1 (en) * 2006-08-31 2008-02-26 Gm Global Technology Operations, Inc. Isolation system for high pressure spark ignition direct injection fuel delivery components
FR2906576B1 (fr) * 2006-10-03 2011-03-04 Renault Sas Agencement de refroidissement d'un injecteur comportant un empilement de rondelles.
FR2907854B1 (fr) * 2006-10-25 2008-12-26 Renault Sas Agencement de refroidissement d'un injecteur comportant deux ressorts imbriques l'un dans l'autre
US7406946B1 (en) * 2007-04-02 2008-08-05 Hitachi, Ltd. Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber
US7527038B2 (en) * 2007-04-02 2009-05-05 Hitachi, Ltd Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber
BRPI0807545A2 (pt) * 2007-05-02 2014-06-17 Bosch Gmbh Robert Motor de combustão interna com proteção de vedação para uma válvula de injeção de combustível
US7513242B2 (en) * 2007-05-03 2009-04-07 Cummins Inc. Fuel injector assembly with injector seal retention
JP2010138778A (ja) * 2008-12-11 2010-06-24 Mitsubishi Heavy Ind Ltd 燃料噴射弁の冷却構造
DE102009029088A1 (de) * 2009-09-02 2011-03-03 Robert Bosch Gmbh Kraftstoffeinspritzanordnung mit optimierter Wärmekopplung zwischen Kraftstoffeinspritzeinrichtung und Zylinderkopf
US9382887B2 (en) 2009-09-23 2016-07-05 Cummins Intellectual Property. Inc. Engine component seal assembly and method of sealing a coolant passage from an engine component
US8230838B2 (en) * 2009-09-23 2012-07-31 Cummins Intellectual Properties, Inc. Injector seal assembly and method of sealing a coolant passage from an injector
GB2502283B (en) * 2012-05-21 2018-12-12 Ford Global Tech Llc An engine system and a method of operating a direct injection engine
US20150059322A1 (en) * 2013-08-30 2015-03-05 Continental Automotive Systems, Inc. Liquid cooled reductant delivery unit for automotive selective catalytic reduction systems
US9453486B1 (en) * 2015-03-20 2016-09-27 Continental Automotive Systems, Inc. Gas direct injector with reduced leakage
WO2019072683A1 (fr) * 2017-10-12 2019-04-18 Continental Automotive Gmbh Soupape d'injection de carburant

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB730432A (en) 1952-05-17 1955-05-25 Maschf Augsburg Nuernberg Ag Improvements in and relating to fuel injection internal combustion engines
DE3000061C2 (de) * 1980-01-03 1993-10-14 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
FR2659115B1 (fr) * 1990-03-02 1992-05-15 Procal Joint d'etancheite pour injecteur de moteur a combustion interne.
US5381600A (en) * 1993-10-06 1995-01-17 Ford Motor Company Heat exchanger and method of making the same
JPH1089192A (ja) 1996-09-10 1998-04-07 Toyota Central Res & Dev Lab Inc デポジット低減式燃料噴射弁
US6009856A (en) * 1998-05-27 2000-01-04 Caterpillar Inc. Fuel injector isolation
JP2000145581A (ja) * 1998-11-13 2000-05-26 Sanshin Ind Co Ltd 筒内燃料噴射式エンジン
DE19955896A1 (de) 1999-11-20 2001-05-31 Daimler Chrysler Ag Kraftstoffeinspritzdüse
DE19962968A1 (de) * 1999-12-24 2001-06-28 Bosch Gmbh Robert Ausgleichselement
DE50110145D1 (de) * 2001-01-12 2006-07-27 Ford Global Tech Inc Geraeuschreduzierende Anordnung von Unterlegscheiben unter einer Einspritzduese
DE10109407A1 (de) 2001-02-28 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10329121A1 (de) * 2003-06-27 2005-01-20 Siemens Ag Entlüftungseinrichtung

Also Published As

Publication number Publication date
EP1658428B1 (fr) 2007-11-14
WO2005019640A1 (fr) 2005-03-03
US20070000480A1 (en) 2007-01-04
JP4537398B2 (ja) 2010-09-01
US7261089B2 (en) 2007-08-28
DE10337892A1 (de) 2005-03-17
JP2007502931A (ja) 2007-02-15
EP1658428A1 (fr) 2006-05-24
DE502004005519D1 (de) 2007-12-27

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