EP2679799A1 - Injecteur de carburant, utilisation d'un injecteur de carburant et système d'injection de carburant - Google Patents

Injecteur de carburant, utilisation d'un injecteur de carburant et système d'injection de carburant Download PDF

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Publication number
EP2679799A1
EP2679799A1 EP13167605.8A EP13167605A EP2679799A1 EP 2679799 A1 EP2679799 A1 EP 2679799A1 EP 13167605 A EP13167605 A EP 13167605A EP 2679799 A1 EP2679799 A1 EP 2679799A1
Authority
EP
European Patent Office
Prior art keywords
injector
fuel
supply line
fuel injector
connection
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.)
Withdrawn
Application number
EP13167605.8A
Other languages
German (de)
English (en)
Inventor
Henning Kreschel
Kai Sutter
Andreas Rau
Wilhelm Christ
Alexander VILLMANN
Thomas Schwarz
Wolfgang Stoecklein
Thomas Pauer
Stephan Amelang
Andreas Rettich
Philipp Wachter
Marco Beier
Sven SIAUW
Markus Rueckle
Andreas Gruenberger
Matthias Horn
Lorenz Zerle
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 EP2679799A1 publication Critical patent/EP2679799A1/fr
Withdrawn legal-status Critical Current

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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
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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

Definitions

  • the invention relates to a fuel injector according to the preamble of claim 1. Furthermore, the invention relates to the use of a fuel injector according to the invention and a fuel injection system using a fuel injector according to the invention.
  • a fuel injector according to the preamble of claim 1 is already known from the prior art and serves to supply the combustion chamber of an internal combustion engine with high-pressure fuel.
  • the fuel injector has an injector housing with a high-pressure connection for the fuel.
  • the high pressure port is hydraulically connected by means of a supply bore to a high pressure chamber of the injector housing.
  • the high pressure port is also connected by means of a supply line with a high pressure storage element, usually in the form of a so-called Rails.
  • the connection between the injector and the supply line takes place in the prior art via a connector, the so-called pressure pipe socket, which in turn is bolted to the connecting line.
  • connection element for a fuel injector, which is connected by means of a welded connection to a supply line, which in turn is coupled by means of a screw connection to a high-pressure storage element (rail).
  • the cap-shaped connection element comprises an end face of the fuel injector, wherein a high-pressure connection is formed in the region of the front side.
  • an O-ring is required between the fuel injector and the inner wall of the connection element.
  • the connection element is fastened to the cylinder head of the internal combustion engine via a screw connection.
  • the invention has the object, a fuel injector according to the preamble of claim 1 such that an alternative connection concept of the fuel injector with the supply line for the fuel is made possible, on the one hand the required tightness between the fuel injector and ensures the supply line, and on the other manufacturing technology relatively easy to produce and inexpensive to implement.
  • This object is achieved in a fuel injector with the features of claim 1, characterized in that the material of the injector in the connection area is weldable, and that the supply line is connected by means of a material connection, in particular by means of its weld with the connection area, so that the injector together forms an assembly with the supply line, or that the connection area of the injector is formed together with the supply line as an integral component.
  • connection area of the injector housing together with the supply line either connected by a material connection and forms an assembly in an engine compartment assembly, or that the addressed components already by their Manufacturing process form a single component, so that a subsequent connection between the two elements is not required.
  • both cases can be up the use of additional connections in the form of screw connections between the actual injector housing and the supply line according to the prior art with the disadvantages already mentioned are dispensed with.
  • the supply line with an end face at the connection area, surrounding an opening of the feed bore on the injector, and that the weld formed as preferably radially encircling, closed weld between the connection area and the supply line is.
  • the injector no additional requirements, such as a specially shaped receptacle for the supply line or the like. Rather, it is sufficient if the feed hole ends on the outside of the injector in the form of a simple mouth, the diameter of which is adapted to the inner diameter of the supply line.
  • a tight or pressure-resistant connection is formed after joining the supply line and the injector between the supply line and the high pressure port, which prevents the escape of fuel from the supply line or the fuel injector.
  • the mouth of the supply bore is arranged on an end face of the injector housing facing away from at least one injection opening.
  • the mouth of the feed bore is arranged on a radial peripheral surface of the injector housing which is of essentially cylindrical design. Since this peripheral surface is usually arranged in a receiving opening for the fuel injector in the cylinder head, it is necessary to bend the supply line accordingly, so that it can be arranged within the receiving bore in the cylinder head.
  • Such a solution also has no space disadvantage compared with the connections according to the prior art which are normally used in practice and makes possible a fuel injector that is particularly short in axial design.
  • a fuel injector according to the invention is used in an externally or internally ignited internal combustion engine on the motor vehicle.
  • a motor vehicle usually has in practice a plurality of combustion chambers, for example at least two or four combustion chambers (cylinders), so that additional cost advantages can be achieved by using a plurality of fuel injectors and supply lines according to the invention.
  • the invention also includes a fuel injection system with at least one fuel injector according to the invention, which is connectable via a supply line with a fuel reservoir, wherein the supply line to the fuel injector by means of a material connection, in particular by means of a weld, or connected to the supply line is a one-piece component formed.
  • Such a weld can be produced with the required accuracy to secure the process reliability and the desired quality, preferably with a laser welding device.
  • the supply line is connected to the high-pressure accumulator element by means of a detachable connection.
  • a releasable connection may be formed, for example, in the form of a union nut or the like.
  • the fuel injection system 100 includes, among other injection components, not shown in detail, a high pressure storage element 110 in the form of a so-called rail.
  • the high-pressure accumulator 110 has four connection stubs 111 for coupling one supply line 1 each.
  • the existing metal supply lines 1 are connected to the respective connecting piece 111 via a respective detachable connection 112, preferably in the form of a screw or a union nut connected.
  • Each of the supply lines 1 is connected to a fuel injector 10 according to the invention.
  • the fuel injector 10 is used in a receiving opening 115 of a cylinder head 116 of the internal combustion engine in a known per se and serves to inject fuel into the respective combustion chamber of the internal combustion engine.
  • a first fuel injector 10 according to the invention is shown, which has an injector housing 11.
  • the injector 11 is arranged with respect to the longitudinal axis 12 of the injector 11 up and down movable nozzle needles 15 whose operation or control in a known per se, not essential to the invention and therefore no longer explained manner, for example by means of a piezoelectric actuator or a Magnetaktors he follows.
  • this closes at least one injection opening, which is formed in the injector 11.
  • the nozzle needle 15 is arranged in the injector housing 11 in a high-pressure chamber 17 in which substantially the pressure prevails from the high-pressure accumulator element 110.
  • a drain port 18 can be returned to the control of the movement of the nozzle needle 15 used, not participating in the injection fuel in a return region of the fuel injection system 100.
  • a feed bore in the form of a through-bore 20 is arranged at the level of the high-pressure chamber 17, which opens into a connection region 21 on the outer circumference or the radial peripheral surface of the usually cylindrically shaped injector housing 11.
  • the supply line 1 has a rectilinearly formed first section 2, which is bent over at the level of the connection region 21 by approximately 90 ° and has an end face 3 for connection to the through-hole 20, which has the through-bore 20 surrounds.
  • the diameter of the through hole 20 is adapted to the inner diameter of the supply line 1.
  • the injector housing 11, at least in the connection region 21 and the supply line 1 are formed as an integral component.
  • the supply line 1 is connected to the injector 11 in the region of the connection portion 21 via a material connection, preferably in the form of a welded connection, and thereby form an assembly.
  • the end face 3 of the supply line 1 is located on the outer circumference of the injector housing 11, wherein the bore of the supply line 1 is aligned with the mouth of the through hole 20.
  • a fillet weld seam 23 which is preferably, but not limiting, made using a laser beam welding device.
  • Both the material of the injector 11, and the material of the supply line 1 are preferably made of weldable material, preferably made of steel with alloying components.
  • Fig. 3 is one opposite the Fig. 2 modified embodiment of the invention shown, in which the fuel injector 10a is connected to the supply line 1 in the amount of an intermediate plate 25.
  • the intermediate plate 25 in turn has a through-bore 26, which connects the high-pressure chamber 17 of the injector housing 11 with the connection region 21 on the outer circumference of the injector housing 11.
  • the through-hole 26 is arranged obliquely with respect to the longitudinal axis 12 of the injector housing 11.
  • a third fuel injection valve 10b according to the invention is shown, in which the supply line 1 is arranged on the end face 28, not shown, of the injector housing 11.
  • the supply line 1 is arranged on the end face 28, not shown, of the injector housing 11.
  • the supply line 1 does not project radially beyond the fuel injector 10b in the region of the end face 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP13167605.8A 2012-06-28 2013-05-14 Injecteur de carburant, utilisation d'un injecteur de carburant et système d'injection de carburant Withdrawn EP2679799A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210211148 DE102012211148A1 (de) 2012-06-28 2012-06-28 Kraftstoffinjektor, Verwendung eines Kraftstoffinjektors sowie Krafteinspritzsystem

Publications (1)

Publication Number Publication Date
EP2679799A1 true EP2679799A1 (fr) 2014-01-01

Family

ID=48430511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13167605.8A Withdrawn EP2679799A1 (fr) 2012-06-28 2013-05-14 Injecteur de carburant, utilisation d'un injecteur de carburant et système d'injection de carburant

Country Status (2)

Country Link
EP (1) EP2679799A1 (fr)
DE (1) DE102012211148A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1098887A (en) * 1964-11-11 1968-01-10 Cav Ltd Liquid fuel injection nozzle units for internal combustion engines
WO2002029241A2 (fr) * 2000-10-04 2002-04-11 Siemens Automotive Corporation Systeme d'alimentation en carburant equipe d'un injecteur de carburant a montage interne sur rail d'alimentation en carburant
US20050028789A1 (en) * 2003-08-05 2005-02-10 Siemens Vdo Automotive Corporation Fuel injector including a bent inlet tube
DE102005047352A1 (de) * 2005-10-04 2007-04-05 Robert Bosch Gmbh Hochdruck-Einspritzsystem
EP1967728A1 (fr) 2007-03-08 2008-09-10 Continental Automotive GmbH Dispositif de couplage et agencement d'alimentation en carburant
US20100012091A1 (en) * 2008-07-17 2010-01-21 Robert Bosch Gmbh In-line noise filtering device for fuel system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1098887A (en) * 1964-11-11 1968-01-10 Cav Ltd Liquid fuel injection nozzle units for internal combustion engines
WO2002029241A2 (fr) * 2000-10-04 2002-04-11 Siemens Automotive Corporation Systeme d'alimentation en carburant equipe d'un injecteur de carburant a montage interne sur rail d'alimentation en carburant
US20050028789A1 (en) * 2003-08-05 2005-02-10 Siemens Vdo Automotive Corporation Fuel injector including a bent inlet tube
DE102005047352A1 (de) * 2005-10-04 2007-04-05 Robert Bosch Gmbh Hochdruck-Einspritzsystem
EP1967728A1 (fr) 2007-03-08 2008-09-10 Continental Automotive GmbH Dispositif de couplage et agencement d'alimentation en carburant
US20100012091A1 (en) * 2008-07-17 2010-01-21 Robert Bosch Gmbh In-line noise filtering device for fuel system

Also Published As

Publication number Publication date
DE102012211148A1 (de) 2014-01-02

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