EP1690001B1 - Systeme d'injection de carburant - Google Patents

Systeme d'injection de carburant Download PDF

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Publication number
EP1690001B1
EP1690001B1 EP04798143A EP04798143A EP1690001B1 EP 1690001 B1 EP1690001 B1 EP 1690001B1 EP 04798143 A EP04798143 A EP 04798143A EP 04798143 A EP04798143 A EP 04798143A EP 1690001 B1 EP1690001 B1 EP 1690001B1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel injection
lines
injection system
valve
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 - Fee Related
Application number
EP04798143A
Other languages
German (de)
English (en)
Other versions
EP1690001A1 (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

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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 injection valve according to the preamble of claim 1.
  • a fuel injection system with a cylinder head and at least one fuel injection valve with a piezoelectric actuator is known.
  • a fuel supply line is introduced in the cylinder head through which fuel flows in the respective fuel injection valve laterally, below the actuator, at relatively low pressure (3 to 4 bar). Due to the Aktorhübe and the effect of a fuel injection valve in the discharge side area integrated piston pump, the fuel is injected with far higher pressure in the combustion chamber.
  • a cylinder head for an internal combustion engine having a plurality of cylinders mounted in the cylinder head includes a fuel supply system for supplying fuel to the respective cylinders, the cylinder head having a fuel supply line to a supply portion of each injector and a fuel return line for returning excess fuel Fuel is provided by a return section of the fuel injection valves.
  • the supply and return passages each include a pair of longitudinal bores extending between a front end and a rear end of the cylinder head. The holes are arranged such that the valve receiving openings intersect.
  • each injector body is provided with a pair of circumferential grooves, one aligned with the inlet and the other with the outlet.
  • the fuel injection system according to the invention with the characterizing features of claim 1 has the advantage that the space requirements, the installation effort and the error rate is significantly reduced.
  • the fuel injection system is also very resistant to mechanical external influences.
  • the number of solvable and prone high pressure connections greatly reduced.
  • the fuel port of the fuel injection valve is arranged at the level of the valve needle.
  • the fuel injection valve can be constructed very easily. In particular, can be dispensed with an extensive sealing of the actuator chamber and the actuator and the fuel injector are built smaller. The space requirement of the fuel injection valve in the cylinder head is thereby greatly reduced and improves the stability of the cylinder head.
  • the fuel lines are connected via at least the valve receiving openings and / or the fuel connections. This allows the Fuel lines are particularly easy to connect.
  • the fuel port has an outer first portion and an inner second portion consisting of at least one laterally introduced in the fuel injection valve opening.
  • the fuel lines are connected via at least two openings of the second section.
  • the first portion of the fuel port is annular groove-shaped. Two fuel lines can be connected reliably and easily with each other.
  • a fuel line 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 easy and aerodynamically favorable.
  • the fuel lines of a fuel line are arranged coaxially to each other and / or formed by a common bore.
  • the fuel lines can be arranged particularly simple and fluidically favorable in the cylinder head.
  • FIG. 1 shown fuel injection system 1 consists essentially of a fuel injection valve 5, which is suitable as a fuel injection valve 5 for fuel injection systems for Gemischverêtnde, spark-ignited internal combustion engines for direct injection of fuel into the combustion chamber of the internal combustion engine, and a cylinder head 10 only partially shown, extending in it fuel lines 11th has, which communicate with each other in the cylinder head 10.
  • the fuel injection valve 5 consists essentially of a round cylindrical housing 3, which is spray-closed by a cover 20, a nozzle body 14, for example, a piezoelectric actuator 2 and a valve needle 12, on the discharge side, a valve closing body 13 is formed.
  • the cylindrical nozzle body 14 In the discharge-side end of the housing 3, the cylindrical nozzle body 14 partially engages. In the course outside the housing 3 tapers in the direction of the combustion chamber, not shown, the nozzle body 14 in the embodiment with a step 23.
  • the valve needle 12 is axially movable in the nozzle body 14 coaxially disposed and via an annular guide member 32 which the valve needle 12 spray-side of a flange 21st closely surrounds and which is arranged immovably on the inner wall of the nozzle body 14, guided.
  • valve seat body 15 At the discharge end of the nozzle body 14, an integrally formed with the nozzle body 14 valve seat body 15 is arranged, the discharge side has a coaxially arranged injection orifice 26.
  • the valve closing body 13 cooperates with a formed on the valve seat body 15 valve seat surface 24 to a sealing seat.
  • the valve closing body 13 of the outwardly opening fuel injection valve 5 is pulled by a return spring 17, which is supported on the nozzle body 14 and acts on a disk-shaped plate member 18 on the valve needle 12, in the rest state in the sealing seat.
  • a return spring 17 By the spring force of the return spring 17 at the same time Abspritzferne the end of the valve needle 12 is held in constant contact with a coupler 4.
  • the actuator 2 is thereby constantly clamped between the coupler 4 and the lid 20.
  • the nozzle body 14 is sealed against the cylinder head 10 by an annular seal 22.
  • the nozzle body 14 rests with 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 discharge-side, projecting into the combustion chamber, not shown part of the nozzle body 15 tapers conically into the combustion chamber up to the coaxially arranged in the nozzle body 14 spray orifice 26 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 embodiment in particular the actuator 2, the return spring 17, the hydraulic coupler 4 and the valve needle 12 are arranged coaxially.
  • the actuator 2 surrounding actuator chamber 31 is sealed by a valve needle 12 radially surrounding corrugated bellows 30 against an entry of fuel.
  • the corrugated bellows 30 is attached with its end close to the discharge via the flange 21 on the valve needle 12 and with its end remote from spraying in the region of the spray-away end of the nozzle body 14, for example, cohesively.
  • the fuel connection 8 is introduced radially in the nozzle body 14 in the illustrated embodiment.
  • the fuel port 8 is at the same height as the fuel lines 11, wherein the two fuel lines 11 open into the fuel port 8.
  • the fuel port 8 consists of a first portion 28 and a second portion 29.
  • the first radially outer portion 28 has in the invention, two opposing cylindrical bores with the two fuel lines 11 on one axis.
  • the first section 28 can also be designed as a groove that radially surrounds the nozzle body 14.
  • the second section 29, which adjoins the first section 28 inwardly, has a smaller flow cross-section and two cylindrical openings lying opposite one another and having the fuel lines 11 on one axis.
  • a filter 9 is arranged, which consists for example of a narrow mesh or a sieve-like laser-drilled material.
  • the filter 9 is made of metal, for example, and is designed as a peripheral ring, in particular in the case of a first section 28 designed as an annular groove.
  • the filter 9 keeps harmful particles contained in the fuel away from the fuel injection valve 5, wherein the particles can be flushed out of the cylinder head 10 via, for example, a return line connected to the fuel lines 11.
  • circumferential annular sealing elements 27 between the step 23 and the housing 3 are inserted into the nozzle body 14.
  • the sealing elements 27 are hermetically sealed on the inner circumference of the valve receiving opening 16 and prevent leakage of the supplied fuel via the fuel line 11.
  • the part of the nozzle body 14 that extends above the step 23 does not lie 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 inner diameter of the valve receiving opening 16 between the two sealing elements 27. This allows the two fuel lines 11 shown without a ringnutartige training of the first portion 28 and / or only one opening in the second Section 29 of the fuel port 8 replace fuel.
  • valve closing body 13 lifts off from the valve seat surface 24 and the fuel supplied via the fuel connections 8 and along the valve needle 12 is sprayed via the injection opening 26 into the combustion chamber, not shown.
  • Fig. 2 1 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 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 valve receiving openings 16 arranged at equal intervals next to each other that the in Fig. 1 indicated valve receiving openings 16 correspond.
  • the cylinder head 10 has laterally designed as a high-pressure port connection 7, which is connected for example via a filter device, not shown, with a high-pressure pump, not shown.
  • each fuel line 11 is pressed in this manner, with the engine running the motor vehicle, fuel with, for example, 40 to 2000 bar.
  • the three series-connected fuel lines 11 form a fuel line 33.
  • Several fuel line strands 33 may be arranged in other embodiments fluidly parallel to each other, for example by a connecting line, not shown, which also extends in the cylinder head 10. Also, combinations of series and parallel arrangements are possible.

Claims (11)

  1. Système d'injection de carburant (1) pour l'injection directe de carburant dans une chambre de combustion d'un moteur à combustion interne comprenant une culasse (10), dans laquelle sont disposées des conduites de carburant (11), et au moins deux soupape d'injection de carburant (5),
    les au moins deux soupapes d'injection de carburant (5) étant disposées dans des ouvertures de réception de soupape (16) et les conduites de carburant (11) débouchant dans les ouvertures de réception de soupape (16) et ensuite dans un raccord de carburant respectif (8) disposé latéralement dans chaque soupape d'injection de carburant (5), et
    les conduites de carburant (11) étant en liaison les unes avec les autres dans la culasse (10),
    chaque raccord de carburant (8) présentant une première portion radialement extérieure (28) et une deuxième portion intérieure (29) qui se compose d'au moins une ouverture pratiquée latéralement dans la soupape d'injection de carburant (5), la deuxième portion (29) présentant une plus faible section transversale d'écoulement, caractérisé en ce que
    les conduites de carburant (11) sont en liaison par le biais d'au moins deux ouvertures de la deuxième portion (29), lesquelles sont formées par deux alésages cylindriques opposés, situés avec les conduites de carburant (11) sur un axe, et
    en ce que la deuxième portion (29) présente deux ouvertures opposées cylindriques, situées avec les conduites de carburant (11) sur un axe.
  2. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    le raccord de carburant (8) est disposé à la hauteur d'une aiguille de soupape respective (12) de chaque soupape d'injection de carburant (5).
  3. v selon la revendication 1 ou 2,
    caractérisé en ce que
    les conduites de carburant (11) sont en liaison par le biais d'au moins les ouvertures de réception de soupape (16) et les raccords de carburant (8).
  4. Système d'injection de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    la première portion (28) du raccord de carburant (8) est réalisée en forme de rainure annulaire.
  5. Système d'injection de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    les conduites de carburant (11) sont en liaison par le biais d'au moins la première portion (28) d'une soupape d'injection de carburant (5).
  6. Système d'injection de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les conduites de carburant (11) forment au moins un tronçon de conduites de carburant (33) constitué d'au moins deux conduites de carburant montées l'une derrière l'autre dans une technique fluidique, le tronçon de conduites de carburant (33) alimentant au moins deux soupapes d'injection de carburant (5) en carburant.
  7. Système d'injection de carburant selon la revendication 6,
    caractérisé en ce que
    les conduites de carburant (11) d'un tronçon de conduites de carburant (33) sont disposées coaxialement les unes aux autres et/ou sont réalisées par rapport un alésage commun.
  8. Système d'injection de carburant selon la revendication 6 ou 7,
    caractérisé en ce
    qu'au moins deux tronçons de conduites de carburant (33) sont disposés en parallèle dans une technique fluidique.
  9. Système d'injection de carburant selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    le raccord de carburant (8) présente un filtre (9) .
  10. Système d'injection de carburant selon la revendication 9,
    caractérisé en ce que
    le filtre (9) est disposé sous forme annulaire autour de la première portion (28).
  11. Système d'injection de carburant selon la revendication 9 ou 10,
    caractérisé en ce que
    le filtre (9) se compose d'un treillis à mailles ou d'un métal de forme annulaire muni de trous percés au laser.
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 EP1690001A1 (fr) 2006-08-16
EP1690001B1 true 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
DE502006008648D1 (de) * 2005-10-25 2011-02-17 Crt Common Rail Technologies Ag Injektor für eine Kraftstoffeinspritzanlage sowie Kraftstoffeinspritzanlage mit einem solchen Injektor
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10260837A1 (de) * 2001-12-25 2003-07-31 Toyota Motor Co Ltd Brennstoffzuführvorrichtung für eine Brennkraftmaschine

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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
US6810546B1 (en) * 2003-08-15 2004-11-02 Alvin J. Smith Internal combustion engine with five port head configuration

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10260837A1 (de) * 2001-12-25 2003-07-31 Toyota Motor Co Ltd Brennstoffzuführvorrichtung für eine Brennkraftmaschine

Also Published As

Publication number Publication date
JP2006526111A (ja) 2006-11-16
DE10355645A1 (de) 2005-07-07
DE502004011530D1 (de) 2010-09-23
EP1690001A1 (fr) 2006-08-16
WO2005052359A1 (fr) 2005-06-09
US20070131202A1 (en) 2007-06-14
US7581529B2 (en) 2009-09-01

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