EP2251541B1 - Kraftstoffeinspritzdüse und Kraftstoffeinspritzsystem - Google Patents

Kraftstoffeinspritzdüse und Kraftstoffeinspritzsystem Download PDF

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Publication number
EP2251541B1
EP2251541B1 EP09006360A EP09006360A EP2251541B1 EP 2251541 B1 EP2251541 B1 EP 2251541B1 EP 09006360 A EP09006360 A EP 09006360A EP 09006360 A EP09006360 A EP 09006360A EP 2251541 B1 EP2251541 B1 EP 2251541B1
Authority
EP
European Patent Office
Prior art keywords
fuel injector
cylinder head
fuel
injector
recess
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
EP09006360A
Other languages
English (en)
French (fr)
Other versions
EP2251541A1 (de
Inventor
Ileana Romeo
Matteo Soriani
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to AT09006360T priority Critical patent/ATE535706T1/de
Priority to EP09006360A priority patent/EP2251541B1/de
Publication of EP2251541A1 publication Critical patent/EP2251541A1/de
Application granted granted Critical
Publication of EP2251541B1 publication Critical patent/EP2251541B1/de
Active 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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials
    • 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
    • F02M61/166—Selection of particular materials

Definitions

  • the invention relates to a fuel injector and a fuel-injection system.
  • Fuel injectors are in wide spread use, in particular for internal combustion engines where they may be arranged in order to dose fuel into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine. Fuel can be supplied to the internal combustion engine by the fuel injectors of the fuel-injection system.
  • the fuel injectors can be coupled to the cylinder head of the internal combustion engine in different manners.
  • the coupling of the fuel injectors to the cylinder heads needs to be very precise to get a correct injection angle.
  • a fuel injector according to the preamble of claim 1 and a respective fuel-injection system are disclosed in EP 1 854 993 A1 .
  • WO 03/018997 A1 discloses a compensation element for supporting a fuel injection valve in a cylinder head. It is embodied as an intermediate ring and arranged between a housing of the fuel injection valve and a receiving borehole in the cylinder head.
  • the object of the invention is to create a fuel injector for a cylinder head of a combustion engine which is simply to be manufactured and which facilitates a reliable and precise coupling between the fuel injector and the cylinder head of the combustion engine.
  • the invention is distinguished by the features of claim 1.
  • a retaining element is fixedly coupled to the injector body and is extending radially outward from the injector body in a manner that the retaining element is in interference with the distance element in radial direction.
  • the distance element is a washer with a given thickness.
  • the distance element is of a material comprising a plastic.
  • the distance element is of a material comprising at least one of a polyphenylene sulfide, a polybutylene terephthalate and a polyethylene terephthalate.
  • the retaining element is coupled to the injector body by an interference fit. This has the advantage that no further processing of the injector body is necessary to couple the retaining element to the injector body. Furthermore, a simple stamping process for the retaining element is possible.
  • the invention is distinguished by a fuel-injection system with a cylinder head of an internal combustion engine and a fuel injector according to the first aspect of the invention.
  • the fuel injector is arranged in a recess of the cylinder head.
  • Figure 1 shows an internal combustion engine 22, with an intake air tract 10, a motor block 12, a cylinder head 14 and an exhaust gas tract 16.
  • a combustion chamber 20 is arranged in the motor block 12 .
  • the cylinder head 14 comprises one or more recesses 15 in which at least one fuel injector 18 and at least one sparking plug 19 are arranged.
  • the injector body 26 is at least partially in engagement with the recess 15.
  • An adjustment device 30 is arranged in the recess 15 and enables the adjustment of the fuel injector 18 relative to the cylinder head 14 of the combustion engine 22.
  • the fuel injector 18 ( Figures 2 and 3 ) comprises an injector coupling portion 24 and a valve assembly 27.
  • the injector coupling portion 24 is designed to be coupled to a highpressure fuel chamber of the internal combustion engine 22, the fuel is stored under high pressure, for example, under the pressure of about 200 bar in the case of a gasoline engine or of more than 2,000 bar in the case of a diesel engine.
  • the injector coupling portion 24 is designed to be coupled to an electrical supply to actuate a not shown actuator unit of the fuel injector 18.
  • the fuel injector 18 comprises a valve body 26 with a central longitudinal axis L and a not shown cavity which is axially led through the valve body 26.
  • the fuel injector 18 further comprises a not shown valve needle taken in the cavity of the valve body 26.
  • the adjustment device 30 comprises a ring element 32 and a distance element 34 extending in the direction of the central longitudinal axis L.
  • the ring element 32 has a spherical surface 36 facing the central longitudinal axis L.
  • the spherical surface 36 is designed to be arranged circumferentially over the ring element 32. Due to the spherical surface 36 the fuel injector 18 can be aligned in radial direction relative to the recess 15.
  • the spherical surface 36 of the ring element 32 acts as a centering unit for the fuel injector 18 in the recess 15.
  • the distance element 34 is shaped as a washer and has a given thickness T in axial direction. Depending on the thickness T of the distance element 34 the axial position of the fuel injector 18 relative to the cylinder head 14 can be adjusted.
  • the distance element 34 is of a material which comprises a plastic.
  • a plastic enables a good contact between the distance element 34 and the cylinder head 14. Furthermore, only little adhesion between the distance element 34 and the cylinder head 14 during the lifetime of the fuel injector 18 can be obtained. Therefore, it is possible that the necessary services as for example a disassembling of the fuel injector 18 from the cylinder head 14 can be carried out very simple. Plastics achieve a low noise emission due to a contact between the fuel injector 18 and the cylinder head 14.
  • the distance element 34 is of a material comprising a polyphenylene sulfide (PPS). PPS is a very hard and robust plastic.
  • the distance element 34 is of a material which comprises at least one of a polybutylene terephthalate and a polyethylene terephthalate.
  • the adjustment device 30 has a retaining element 38 which is fixedly coupled to the injector body 26.
  • the retaining element 38 is of a material which comprises a plastic.
  • the retaining element 38 is coupled to the injector body 26 by an interference fit. This has the advantage that no further machining of the valve body 26 is necessary.
  • the retaining element 38 is extending in radial direction from the injector body 26. The maximum radial extension of the retaining element 38 is at least as large as the inner diameter of the distance element 34. By this the retaining element 38 is in radial interference with the distance element 34.
  • the fuel injector 18 shall be removed from the cylinder head 14, the fuel injector 18 with the ring element 32, the distance element 34 and the retaining element 38 can be pulled out from the recess 15 in the cylinder head 14 in a direction opposite to the inserting direction D.
  • the fuel injector 18 can be pulled out from the recess 15 very simple.
  • the retaining element 38 is in radial interference with the distance element 34, the retaining element 38 can come into engagement with the distance element 34 and/or the ring element 32. Therefore, the distance element 34 and the ring element 32 can be moved out from the recess 15.
  • the construction of the adjustment device 30 allows an exact alignment of the fuel injector 18 relative to the cylinder head 14 and a fast and simple disassembly of the fuel injector 18 from the cylinder head 14.

Landscapes

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

Claims (6)

  1. Kraftstoffeinspritzdüse (18), beinhaltend eine mittige Längsachse (L) und verwendbar zur Anordnung in einem Zylinderkopf (14) eines Verbrennungsmotors (22), wobei die Kraftstoffeinspritzdüse (18) einen Einspritzdüsenkörper (26) und eine Einstelleinrichtung (30) aufweist und die Einstelleinrichtung (30) umfasst
    • ein Ringelement, konstruiert zur Anordnung in einer Ausnehmung (15) eines Zylinderkopfes (14) zwischen dem Einspritzdüsenkörper (26) und dem Zylinderkopf (14), um die Einspritzdüse (18) in Bezug auf die Ausnehmung (15) in Radialrichtung auszurichten, dadurch gekennzeichnet dass
    ein Abstandselement (34) zwischen dem Einspritzdüsenkörper (26) und dem Zylinderkopf (14) in der Ausnehmung (15) angeordnet ist, um die Einspritzdüse (18) in Bezug auf den Zylinderkopf (14) in Axialrichtung anzupassen, und dass ein Festhaltelement (38) fest mit dem Einspritzdüsenkörper (26) verbunden ist und sich derart von dem Einspritzdüsenkörper (26) radial nach außen erstreckt, das dass Festhaltelement (38) in Radialrichtung mit dem Abstandselement (34) in Übermaß ist.
  2. Kraftstoffeinspritzdüse (18) gemäß Anspruch 1, wobei das Abstandselement (34) eine Unterlegscheibe mit einer gegebenen Dicke (T) ist.
  3. Kraftstoffeinspritzdüse (18) gemäß Anspruch 1 oder 2, wobei das Abstandselement (34) aus einem einen Kunststoff umfassenden Material ist.
  4. Kraftstoffeinspritzdüse (18) gemäß irgendeinem der vorhergehenden Ansprüche, wobei das Abstandselement (34) aus einem Material umfassend mindestens eines aus einem Polyphenylensulfid, einem Polybutylenterephthalat und einem Polyethylenterephthalat ist.
  5. Kraftstoffeinspritzdüse (18) gemäß irgendeinem der vorhergehenden Ansprüche, wobei das Festhaltelement (38) mit dem Einspritzdüsenkörper (26) durch eine Presspassung verbunden ist.
  6. Kraftstoffeinspritzsystem mit einem Zylinderkopf (14) eines Verbrennungsmotors (22) und einer Kraftstoffeinspritzdüse (18) gemäß irgendeinem der vorhergehenden Ansprüche, wobei die Kraftstoffeinspritzdüse (18) in einer Ausnehmung (15) des Zylinderkopfes (14) angeordnet ist.
EP09006360A 2009-05-11 2009-05-11 Kraftstoffeinspritzdüse und Kraftstoffeinspritzsystem Active EP2251541B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT09006360T ATE535706T1 (de) 2009-05-11 2009-05-11 Kraftstoffeinspritzdüse und kraftstoffeinspritzsystem
EP09006360A EP2251541B1 (de) 2009-05-11 2009-05-11 Kraftstoffeinspritzdüse und Kraftstoffeinspritzsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09006360A EP2251541B1 (de) 2009-05-11 2009-05-11 Kraftstoffeinspritzdüse und Kraftstoffeinspritzsystem

Publications (2)

Publication Number Publication Date
EP2251541A1 EP2251541A1 (de) 2010-11-17
EP2251541B1 true EP2251541B1 (de) 2011-11-30

Family

ID=41347876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09006360A Active EP2251541B1 (de) 2009-05-11 2009-05-11 Kraftstoffeinspritzdüse und Kraftstoffeinspritzsystem

Country Status (2)

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EP (1) EP2251541B1 (de)
AT (1) ATE535706T1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10619612B2 (en) 2014-09-23 2020-04-14 Continental Automotive Gmbh Fuel injection valve and fuel-injection system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2690278B1 (de) * 2012-07-23 2015-12-30 Continental Automotive GmbH Kraftstoffeinspritzdüse und Kraftstoffeinspritzsystem

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10012759A1 (de) * 2000-03-16 2001-09-20 Volkswagen Ag Brennkraftmaschine mit Einspritzventilen
DE10108193A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Befestigungsvorrichtung
DE10140797A1 (de) * 2001-08-20 2003-07-31 Bosch Gmbh Robert Ausgleichselement für ein Brennstoffeinspritzventil
DE102005011574A1 (de) * 2005-03-14 2006-09-21 Robert Bosch Gmbh Zwischenelement für ein Brennstoffeinspritzventil
GB0609519D0 (en) * 2006-05-12 2006-06-21 Delphi Tech Inc Fuel injector
DE102007035714A1 (de) * 2007-07-30 2009-02-05 Robert Bosch Gmbh Brennstoff-Einspritzanlage mit Ausgleichselement
DE102007049357A1 (de) * 2007-10-15 2009-04-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10619612B2 (en) 2014-09-23 2020-04-14 Continental Automotive Gmbh Fuel injection valve and fuel-injection system

Also Published As

Publication number Publication date
ATE535706T1 (de) 2011-12-15
EP2251541A1 (de) 2010-11-17

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