EP2052149B1 - Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne - Google Patents

Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne Download PDF

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Publication number
EP2052149B1
EP2052149B1 EP07784620.2A EP07784620A EP2052149B1 EP 2052149 B1 EP2052149 B1 EP 2052149B1 EP 07784620 A EP07784620 A EP 07784620A EP 2052149 B1 EP2052149 B1 EP 2052149B1
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EP
European Patent Office
Prior art keywords
cylinder head
injector
bore
inlet
lance
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
EP07784620.2A
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German (de)
English (en)
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EP2052149A1 (fr
Inventor
Johannes Schnedt
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
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Robert Bosch GmbH
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Publication date
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Publication of EP2052149A1 publication Critical patent/EP2052149A1/fr
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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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating 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
    • 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

Definitions

  • the invention relates to a device for injecting fuel into the combustion chamber of an internal combustion engine with an injector defined in a cylinder head and a plurality of inlet and outlet lines extending through the cylinder head for supplying the injector with media, in particular fuel, coolant and / or lubricant.
  • Such a device is for example the JP 5195906 A refer to.
  • an electronically controlled injector for injecting fuel into the combustion chamber is usually located in the cylinder head.
  • This injector must be supplied with various media such as high pressure fuel, lubricating oil or coolant. Furthermore, leakage quantities occurring must again be led out of the cylinder, as well as the resulting return of lubricating oil or coolant.
  • the injector is not freely accessible from outside the cylinder head, the various supply and discharge to or from the injector must pass through corresponding holes in the cylinder head, and usually for each medium a supply and possibly a drain hole must be provided in the cylinder head , Due to the existing water channels for cooling the cylinder block, however, it is often difficult to provide the necessary holes for the media transport available.
  • US3845748 shows a device for supplying media of an injection injector, wherein the fuel is supplied through a high pressure line, which is located in a bore.
  • the high pressure line is also located in a tubular spacer. The return takes place via an annular channel between the outer surface of the spacer and the inner surface of the bore.
  • the present invention therefore aims to reduce the necessary number of holes in the cylinder head for the transport of media while minimizing the cost of manufacturing and assembly of the injector and the connection of the different inlet and outlet lines to the injector simplify. Furthermore, the reliability should be increased.
  • the injection device is designed such that the supply and discharge lines are guided through a common bore of the cylinder head, wherein at least two supply and discharge lines are formed by concentric tubes.
  • the conversion of engines with conventional injection systems is facilitated to a common-rail injection system, since the cylinder head does not need to be manipulated and no additional holes must be introduced.
  • a single bore for receiving a variety of inlets and outlets, so that usually eliminates the need for further drilling in the cylinder head.
  • at least two of the plurality of inlet and outlet lines are formed by concentric tubes.
  • Another channel for the supply and discharge of media is provided in accordance with a preferred embodiment, characterized in that the cladding tube at a distance from the inner wall of the bore of the Cylinder head is arranged.
  • a further annular channel is formed between the outer wall of the cladding tube and the inner wall of the bore provided in the cylinder head.
  • a further increase in the number of flow channels preferably succeeds in that the annular space between the central tube and the cladding tube is divided to form at least two supply and discharge lines in the circumferential direction. This results in two part-annular channels, wherein additional channels for the transport of media to or from the injector can be created within the annular space by arranging further partitions.
  • the central tube is preferably designed as a high-pressure line for the supply of high-pressure fuel to the injector.
  • the central pipe is the only one to have a circular flow cross-section, so that connection to high-pressure fuel-carrying supply lines or connection to the injector is made considerably easier.
  • the central arrangement of the high pressure line has the advantage that at a fraction of the high pressure line is not necessarily flooded immediately the cylinder head, as well as after such a break further concentric tubes remain, which can lead the high pressure medium accordingly.
  • a particularly safe and compact design results according to a preferred embodiment in that the central tube with the cladding tube forms a lance whose conical end can be pressed against a conical seat of a lance receiving bore of the injector.
  • the conical design of the lance end makes it possible to produce a particularly tight connection of the central tube and in particular the central high-pressure line to the injector.
  • said annular channel preferably opens into an annular stitch in the lance receiving bore of the injector, so that at the same time a tight connection of the central high-pressure line and the high-pressure line annularly surrounding channel succeeds when inserting the lance into the lance receiving bore.
  • a particularly compact design results according to a preferred embodiment in that the bore of the cylinder head extends transversely to the nozzle axis.
  • FIG. 1 schematically the media supply of a Einspritzinjektors according to the prior art and FIGS. 2 and 3 the inventive design of the media supply shows.
  • Fig. 1 schematically shows the media supply of a Einspritzinjektors 1.
  • the injector 1 In the cylinder head 2 to a plurality of holes 3, 4 and 5 are attached. With the help of a high pressure line 6, which is guided in the low pressure return bore 4, the injector 1 is supplied under high pressure fuel. The amount of fuel necessary to control the injection is conveyed via the low-pressure return bore 4 back into the fuel tank (not shown).
  • the injection injector 1 can be additionally supplied with lubricant or coolant.
  • the lubricant / coolant return takes place via a return bore 5 in a lubricant / coolant tank, not shown.
  • the individual media are separated by means of sealing elements 7, which may be formed for example as O-rings.
  • Fig. 2 shows the inventive embodiment of the media supply.
  • the injector 1 is supplied here by a single connection bore 8 in the cylinder head 2, in which a lance 9 is installed.
  • the lance 9 is fixed in a lance receiving bore 16 of the injector 1 and to a bore 23 connected.
  • the lance consists here of a high-pressure line 11 and a coaxially arranged jacket tube 10 whose outer diameter is smaller than the inner diameter of the connection bore 8. This results in a plurality of coaxially arranged annular spaces 12, 13, 14 and 15, in which the required media can be performed , In the central high-pressure bore 12, high-pressure fuel is supplied to the injection injector 1.
  • the necessary for the control of the injection injector 1 part of the fuel is returned via the located between the connecting hole 8 and sheath 10 low-pressure return line 14 in the fuel tank, not shown.
  • the media are sealed against each other by means of sealing elements 19 and 20.
  • the seal 19 defines an annular space 25 from which leads away a schematically indicated line 21. Through the seal 20, a sealing of the annular space created by an annular space 22, wherein a line 24 leads away from this annular space 22.
  • Fig. 3 is a section along the line III-III of Fig. 2 shown enlarged, wherein the partitions 17 and 18 can be seen, which divides the annular space between cladding tube 10 and high pressure line 11 into the channels 13 and 15.

Landscapes

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

Claims (8)

  1. Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne comprenant un injecteur fixé dans une culasse et une pluralité de conduites d'amenée et de sortie s'étendant à travers la culasse pour l'alimentation de l'injecteur en fluides, notamment en carburant, en liquide de refroidissement et/ou en lubrifiant, la pluralité de conduites d'amenée et de sortie étant guidée à travers un alésage commun (8) de la culasse (2), caractérisé en ce qu'au moins deux de la pluralité de conduites d'amenée et de sortie sont formées par des tubes concentriques (10, 11).
  2. Dispositif selon la revendication 1, caractérisé en ce que dans l'alésage (8) de la culasse (2) est disposé un tube central (11) qui est entouré par un tube d'enveloppe concentrique (10) à distance de celui-ci.
  3. Dispositif selon la revendication 2, caractérisé en ce que le tube d'enveloppe (10) est disposé à distance de la paroi interne de l'alésage (8) de la culasse (2).
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que l'espace annulaire entre le tube central (11) et le tube d'enveloppe (10) est divisé dans la direction périphérique pour réaliser au moins deux conduites d'amenée ou de sortie (13, 15).
  5. Dispositif selon la revendication 2, 3 ou 4, caractérisé en ce que le tube central (11) est réalisé sous forme de conduite haute pression pour l'alimentation en carburant haute pression à l'injection (1).
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'alésage (8) de la culasse (2) s'étend transversalement à l'axe de la buse.
  7. Dispositif selon l'une quelconque des revendications 2 à 6, caractérisé en ce que le tube central (11) constitue avec le tube d'enveloppe (10) une lance dont l'extrémité conique peut être pressée contre un siège conique d'un alésage de réception de lance (16) de l'injecteur (1).
  8. Dispositif selon l'une quelconque des revendications 4 à 7, caractérisé en ce que l'espace annulaire débouche dans une entaille annulaire dans l'alésage de réception de lance (16) de l'injecteur (1).
EP07784620.2A 2006-08-17 2007-08-16 Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne Active EP2052149B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT13832006 2006-08-17
PCT/AT2007/000391 WO2008019415A1 (fr) 2006-08-17 2007-08-16 dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2052149A1 EP2052149A1 (fr) 2009-04-29
EP2052149B1 true EP2052149B1 (fr) 2016-01-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07784620.2A Active EP2052149B1 (fr) 2006-08-17 2007-08-16 Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne

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Country Link
EP (1) EP2052149B1 (fr)
WO (1) WO2008019415A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8522752B2 (en) * 2010-09-03 2013-09-03 Caterpillar Inc. Co-axial quill assembly for dual fuel common rail system
FI124086B (fi) * 2011-02-09 2014-03-14 Wärtsilä Finland Oy Putkiliitin ja polttoaineen ruiskutusjärjestelmä
US8683979B2 (en) 2011-02-14 2014-04-01 Caterpillar Inc. Dual fuel common rail system and engine using same
CN114135415B (zh) * 2021-11-30 2023-05-09 中车大连机车车辆有限公司 一种在运行中实时监测气缸盖内部漏水、漏气的方法和结构
JP7495142B2 (ja) 2022-05-09 2024-06-04 株式会社ベスト ブレーキ装置及び引戸

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845748A (en) * 1972-09-29 1974-11-05 Mack Trucks Fuel injection nozzle holder installation
JPH05195906A (ja) * 1992-01-21 1993-08-06 Mazda Motor Corp 内燃機関の燃料通路構造
DE19608572A1 (de) * 1996-03-06 1997-09-11 Bosch Gmbh Robert Kraftstoffzuleitungseinrichtung
GB9727421D0 (en) * 1997-12-30 1998-02-25 Perkins Ltd Apparatus and method for connecting a fuel pressure tube to a fuel injector of an internal combustion engine

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Publication number Publication date
WO2008019415A1 (fr) 2008-02-21
EP2052149A1 (fr) 2009-04-29

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