EP2052149A1 - 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

Info

Publication number
EP2052149A1
EP2052149A1 EP07784620A EP07784620A EP2052149A1 EP 2052149 A1 EP2052149 A1 EP 2052149A1 EP 07784620 A EP07784620 A EP 07784620A EP 07784620 A EP07784620 A EP 07784620A EP 2052149 A1 EP2052149 A1 EP 2052149A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
injector
bore
supply
tube
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
EP07784620A
Other languages
German (de)
English (en)
Other versions
EP2052149B1 (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
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 EP2052149A1 publication Critical patent/EP2052149A1/fr
Application granted granted Critical
Publication of EP2052149B1 publication Critical patent/EP2052149B1/fr
Active 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
    • 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 can be found for example in JP 5195906 A.
  • 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 various supply and discharge lines to and from the injector must pass through corresponding holes in the cylinder head, with an inlet and possibly a drain hole in the cylinder head being normally provided for each medium have to be. Due to the existing water channels for cooling the Zylinderblo ⁇ kes, however, it is often difficult to provide the necessary holes for the media transport available.
  • the present invention therefore aims to reduce the number of bores in the cylinder head necessary for the transport of media while at the same time minimizing the expense of manufacturing and assembling the injector and to connect the various supply and discharge 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 on a common-rail injection system is facilitated because 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 inlets and outlets 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, in the event of a break in the high-pressure line, the cylinder head is not necessarily flooded immediately, since even after such a break further concentric tubes remain which can guide 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.
  • the lance in the free space between the high-pressure line and the concentrically arranged cladding tube has an additional channel, which further transporting Media is used, this 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 shows schematically the media supply of a Einspritzinjektors according to the prior art
  • Fig. 2 and 3 shows the inventive design of the media supply.
  • Fig. 1 shows schematically 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 for controlling the injection is conveyed back into the fuel tank (not shown) via the low-pressure return bore 4.
  • 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 erfindungsunpliliche training of the media supply.
  • the injector 1 is supplied here by a single connection hole 8 in the cylinder head 2 f 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 part of the fuel required for the control of the injection injector 1 is returned to the fuel tank, not shown, via the low-pressure return line 14 located between the connection bore 8 and the jacket tube 10.
  • the low-pressure return line 14 located between the connection bore 8 and the jacket tube 10.
  • 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 is shown enlarged, wherein the partitions 17 and 18 can be seen, which divides the annular space between the cladding tube 10 and the 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)

Abstract

Dans un dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne qui présente un injecteur (1) fixé dans une tête de cylindre (2) et plusieurs conduits d'amenée et d'évacuation qui traversent la tête de cylindre (2) et qui alimentent en fluides l'injecteur (1), en particulier en carburant, en liquide de refroidissement et/ou en lubrifiant, les conduits d'amenée et les conduits d'évacuation sont passés dans un alésage commun (8) de la tête de cylindre (2) et au moins deux conduits d'amenée ou d'évacuation sont formés par des tubes concentriques (10, 11).
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 true EP2052149A1 (fr) 2009-04-29
EP2052149B1 EP2052149B1 (fr) 2016-01-13

Family

ID=38573360

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

Country Status (2)

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

Families Citing this family (4)

* 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

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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008019415A1 *

Also Published As

Publication number Publication date
WO2008019415A1 (fr) 2008-02-21
EP2052149B1 (fr) 2016-01-13

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