EP1690001A1 - Systeme d'injection de carburant - Google Patents

Systeme d'injection de carburant

Info

Publication number
EP1690001A1
EP1690001A1 EP04798143A EP04798143A EP1690001A1 EP 1690001 A1 EP1690001 A1 EP 1690001A1 EP 04798143 A EP04798143 A EP 04798143A EP 04798143 A EP04798143 A EP 04798143A EP 1690001 A1 EP1690001 A1 EP 1690001A1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel injection
injection system
valve
lines
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.)
Granted
Application number
EP04798143A
Other languages
German (de)
English (en)
Other versions
EP1690001B1 (fr
Inventor
Günter Wolff
Bernd Strauss
Hubert Stier
Helga Goller
Stefan NÜSSLEIN
Reinhard Brendel
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 EP1690001A1 publication Critical patent/EP1690001A1/fr
Application granted granted Critical
Publication of EP1690001B1 publication Critical patent/EP1690001B1/fr
Expired - Fee Related 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • 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

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • a fuel injection system with a cylinder head and at least one fuel injector with a piezoelectric actuator is known.
  • a fuel feed line is introduced in the cylinder head, through which fuel flows into the respective fuel injector on the side, below the actuator, at a relatively low pressure (3 to 4 bar). Due to the actuator strokes and the effect of a piston pump integrated in the fuel injection valve in the area on the spray side, the fuel is sprayed into the combustion chamber at a much higher pressure.
  • a disadvantage of this known prior art is that, particularly when this system is used in internal combustion engines with a simple fuel injector and high-pressure injection without an integrated pump, the fuel feed lines arranged outside the cylinder head are very complex manufactured and due to their inevitable flexibility must be calculated very complex. The space requirement, the installation effort and the susceptibility to errors, particularly in relation to external mechanical influences, have increased considerably.
  • the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that the space requirement, the assembly effort and the susceptibility to errors are considerably reduced.
  • the fuel injection system is also very resistant to mechanical external influences.
  • the number of detachable and vulnerable high-pressure connections is greatly reduced.
  • the fuel connection of the fuel injection valve is arranged at the level of the valve needle.
  • the fuel injector can therefore be constructed very simply. In particular, extensive sealing of the actuator space or the actuator can be dispensed with and the fuel injection valve can be made smaller. The space requirement of the fuel injector in the cylinder head is thereby greatly reduced and the stability of the cylinder head is improved.
  • the fuel lines are advantageously connected via at least the valve receiving openings and / or the fuel connections. This allows the Fuel lines are particularly easily connected.
  • the fuel connection has an outer first section and an inner second section, which consists of at least one opening made laterally in the fuel injection valve.
  • the fuel lines are connected via at least two openings in the second section and / or the first section of the fuel connection is in the form of an annular groove. Two fuel lines can thus be connected to one another reliably and easily.
  • a fuel line branch formed from at least two fuel lines arranged one behind the other supplies at least two fuel injection valves with fuel.
  • the fuel lines can be arranged in the cylinder head very easily and in terms of flow technology.
  • the fuel lines of a fuel line branch are arranged coaxially to one another and / or are formed by a common bore.
  • the fuel lines can be arranged in the cylinder head in a particularly simple and fluidly favorable manner.
  • Fig. 1 is a schematic, sectional view of an embodiment of a fuel injection system according to the invention.
  • Fig. 2 shows an embodiment of a cylinder head of a fuel injection system according to the invention.
  • the fuel injection system 1 essentially consists of a fuel injection valve 5, which is suitable as a fuel injection valve 5 for fuel injection systems for mixture-compressing, spark-ignition internal combustion engines for the direct injection of fuel into the combustion chamber of the internal combustion engine, and a cylinder head 10, which is only partially shown, which has fuel lines 11 running in it, which are connected to one another in the cylinder head 10.
  • the fuel injector 5 engages in a cylinder-shaped valve-receiving opening 16 arranged in the cylinder head 10 and tapering towards the combustion chamber (not shown), the fuel-injection valve 5 in this exemplary embodiment protruding through its valve-side opening 16 into the combustion chamber.
  • the fuel injector 5 essentially consists of a round cylindrical housing 3, which is closed by a cover 20 remote from the spray, a nozzle body 14, a piezoelectric actuator 2, for example, and a valve needle 12 on which a valve closing body 13 is formed on the spray side.
  • the cylindrical nozzle body 14 partially engages in the spray-side end of the housing 3.
  • the nozzle body 14 tapers in the exemplary embodiment with a step 23 in the direction of the combustion chamber (not shown) closely surrounds and which is arranged on the inner wall of the nozzle body 14 in a fixed manner.
  • valve seat body 15 which is formed in one piece with the nozzle body 14 and which has a coaxially arranged spray opening 26 on the spray-side.
  • the valve closing body 13 interacts with a valve seat surface 24 formed on the valve seat body 15 to form a sealing seat.
  • the valve closing body 13 of the outwardly opening fuel injection valve 5 is pulled into the sealing seat in the idle state by a return spring 17, which is supported on the nozzle body 14 and engages on the valve needle 12 via a perforated disk-shaped plate element 18. Due to the spring force of the return spring 17, the end of the valve needle 12 remote from the spray is simultaneously held in constant contact with a coupler 4. The actuator 2 is thereby constantly clamped between the coupler 4 and the cover 20.
  • Nozzle body 14 is the nozzle body 14 against the
  • the nozzle body 14 lies on the step 23 a correspondingly shaped shoulder 34 of the valve receiving opening 16, for example with the interposition of a seal, not shown, hermetically sealed.
  • the spray-side part of the nozzle body 15 projecting into the combustion chamber tapers conically into the combustion chamber as far as the spray opening 26 arranged coaxially in the nozzle body 14, through which the valve needle 12 engages with the valve closing body 15.
  • the fuel injection valve 5 has a central axis 19, to which, in this exemplary embodiment, in particular the actuator 2, the return spring 17, the hydraulic coupler 4 and the valve needle 12 are arranged coaxially.
  • An actuator space 31 arranged in the housing 3 and surrounding the actuator 2 is sealed against the entry of fuel by a corrugated bellows 30 radially surrounding the valve needle 12.
  • the corrugated bellows 30 is attached to the valve needle 12 with its end close to the spray, via the flange 21, and with its end remote from the spray in the region of the end of the nozzle body 14 remote from the spray, for example, integrally.
  • the fuel connection 8 is introduced radially in the nozzle body 14 between the spray-side end of the housing 3 and the step 23.
  • the fuel connection 8 is at the same level as the fuel lines 11, the two fuel lines 11 opening into the fuel connection 8.
  • the fuel connection 8 consists in each case of a first section 28 and a second section 29.
  • the first radially outer section 28 has two cylindrical bores lying opposite one another and lying on one axis with the two fuel lines 11, but can also be used as a groove running radially around the nozzle body 14 may be formed.
  • the second section 29, which adjoins the first section 28 inwards, has a smaller flow cross section and two cylindrical openings lying opposite one another and lying on one axis with the fuel lines 11.
  • a filter 9 is arranged in front of the fuel connection 8, which consists, for example, of a narrow mesh or a sieve-like laser-drilled material.
  • the filter 9 is made, for example, of metal and, particularly in the case of a first section 28 designed as an annular groove, is designed as a circumferential ring.
  • the filter 9 keeps harmful particles contained in the fuel away from the fuel injection valve 5, the particles being able to be flushed out of the cylinder head 10, for example, via a return line (not shown) connected to the fuel lines 11.
  • Circumferential annular sealing elements 27 are embedded in the nozzle body 14 between the step 23 and the housing 3 above and below the fuel connection 8.
  • the sealing elements 27 lie hermetically on the inner circumference of the valve receiving opening 16 and prevent leakage of the fuel supplied via the fuel line 11.
  • the part of the nozzle body 14 running above the step 23 does not rest on the inner circumference of the valve receiving opening. Rather, the nozzle body 14 between the two sealing elements 27 has a smaller diameter than the inside diameter of the valve receiving opening 16 between the two sealing elements 27.
  • the two fuel lines 11 shown can also be designed without an annular groove-like configuration of the first section 28 and / or only one opening in the second Section 29 of the fuel connection 8 Replace fuel.
  • valve closing body 13 lifts off the valve seat surface 24 and the fuel supplied via the fuel connections 8 and along the valve needle 12 is sprayed into the combustion chamber (not shown) via the spray opening 26.
  • FIG. 2 schematically shows an embodiment of a cylinder head 10 of a fuel injection system 1 according to the invention.
  • the cylinder head 10 shown is, for example, a component of a reciprocating piston internal combustion engine with three cylinders arranged in series or a V6 cylinder engine with two cylinder heads 10.
  • the cylinder head 10 has three cylinders arranged next to one another at equal intervals Valve receiving openings 16, which correspond to the valve receiving openings 16 shown in FIG. 1.
  • the cylinder head 10 laterally has a connection 7 designed as a high-pressure connection, which is connected, for example, to a high-pressure pump, not shown, via a filter device, not shown.
  • fuel with, for example, 40 to 2000 bar is pressed into the three fuel lines 11 arranged one behind the other and coaxially to one another.
  • the three fuel lines 11 connected in series form a fuel line branch 33.
  • a plurality of fuel line branches 33 can be arranged in parallel with one another in terms of flow technology, for example by means of a connection line (not shown), which likewise runs in the cylinder head 10. Combinations of series and parallel arrangements are also possible.
  • Cylinder head 10 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

L'invention concerne un système d'injection de carburant (1), en particulier pour l'injection directe de carburant dans une chambre de combustion d'un moteur à combustion interne, lequel système comprend une culasse de cylindre (10), dans laquelle des conduits de carburant (11) sont placés, et au moins deux injecteurs de carburant. Ces injecteurs de carburant (5) présentent chacun un actionneur (2) et un pointeau de soupape (12) en liaison active avec cet actionneur (2). Un corps de fermeture (13) de soupape est placé, côté pulvérisation, sur le pointeau de soupape (12), lequel corps de fermeture coopère avec une surface de siège (24) de soupape pour former un siège d'étanchéité. Lesdits au moins deux injecteurs (5) sont placés dans des orifices de réception (16) d'injecteur et les conduits de carburant (11) débouchent dans ces orifices de réception (16) d'injecteur ainsi que dans un raccord (8) de conduit de carburant, placé sur un côté à l'intérieur de l'injecteur de carburant respectif (5). Ces conduits de carburant (11) sont reliés les uns aux autres dans la culasse de cylindre (10).
EP04798143A 2003-11-28 2004-11-03 Systeme d'injection de carburant Expired - Fee Related EP1690001B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10355645A DE10355645A1 (de) 2003-11-28 2003-11-28 Brennstoffeinspritzsystem
PCT/EP2004/052768 WO2005052359A1 (fr) 2003-11-28 2004-11-03 Systeme d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1690001A1 true EP1690001A1 (fr) 2006-08-16
EP1690001B1 EP1690001B1 (fr) 2010-08-11

Family

ID=34625348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04798143A Expired - Fee Related EP1690001B1 (fr) 2003-11-28 2004-11-03 Systeme d'injection de carburant

Country Status (5)

Country Link
US (1) US7581529B2 (fr)
EP (1) EP1690001B1 (fr)
JP (1) JP2006526111A (fr)
DE (2) DE10355645A1 (fr)
WO (1) WO2005052359A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1780406B1 (fr) * 2005-10-25 2011-01-05 CRT Common Rail Technologies AG Injecteur pour un système d'injection de carburant et système d'injection de carburant avec tel injecteur
DE102009002909A1 (de) 2009-05-07 2010-11-18 Robert Bosch Gmbh Einspritzventil für ein Fluid
DE102009026532A1 (de) 2009-05-28 2010-12-02 Robert Bosch Gmbh Einspritzventil für ein Fluid
DE102010005064A1 (de) * 2010-01-20 2011-07-21 Bayerische Motoren Werke Aktiengesellschaft, 80809 Zylinderkopf für eine Brennkraftmaschine
DE102012215777A1 (de) 2012-09-06 2014-03-06 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102013219225A1 (de) * 2013-09-25 2015-03-26 Continental Automotive Gmbh Piezo-Injektor zur Kraftstoff-Direkteinspritzung
US20170335791A1 (en) * 2016-05-23 2017-11-23 Caterpillar Inc. Cylinder Head
GB2559597B (en) * 2017-02-10 2020-02-26 Delphi Tech Ip Ltd Fuel injector

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125078A (en) * 1964-03-17 Fuel supply system
DE826216C (de) 1948-12-31 1951-12-27 E H Karl Maybach Dr Ing Anordnung fuer die Kraftstoffeinspritzung bei Brennkraftmaschinen, insbesondere in Kraftfahrzeugen
AT382429B (de) 1979-09-28 1987-02-25 List Hans Einspritzbrennkraftmaschine
US4485790A (en) * 1982-04-19 1984-12-04 Yanmar Diesel Engine Company Limited Holding construction of a fuel injection valve in an internal combustion engine
JPH01125860A (ja) 1987-11-10 1989-05-18 Nec Corp 不揮発性ランダム・アクセス半導体記憶装置
US5487508A (en) * 1994-03-31 1996-01-30 Caterpillar Inc. Injection rate shaping control ported check stop for a fuel injection nozzle
JP3521555B2 (ja) * 1995-06-30 2004-04-19 日産自動車株式会社 直接噴射型火花点火機関の燃料供給装置
SE510090C2 (sv) 1996-10-11 1999-04-19 Volvo Lastvagnar Ab Långsträckt cylinderhuvud med kaviteter för insprutningsenheter och bränsletillförselanordningar
DE19712921A1 (de) * 1997-03-27 1998-10-01 Bosch Gmbh Robert Brennstoffeinspritzventil mit piezoelektrischem oder magnetostriktivem Aktor
DE19750298A1 (de) 1997-11-13 1999-05-20 Man Nutzfahrzeuge Ag Brennkraftmaschine mit Hochdruckeinspritzsystem
US6807946B2 (en) * 2001-12-25 2004-10-26 Toyota Jidosha Kabushiki Kaisha Fuel supply device for internal combustion engine
US6810546B1 (en) * 2003-08-15 2004-11-02 Alvin J. Smith Internal combustion engine with five port head configuration

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005052359A1 *

Also Published As

Publication number Publication date
DE10355645A1 (de) 2005-07-07
DE502004011530D1 (de) 2010-09-23
EP1690001B1 (fr) 2010-08-11
JP2006526111A (ja) 2006-11-16
WO2005052359A1 (fr) 2005-06-09
US20070131202A1 (en) 2007-06-14
US7581529B2 (en) 2009-09-01

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