EP3640470A1 - Fluideinspritzanordnung und kombination aus einer feder und einem befestigungselement - Google Patents

Fluideinspritzanordnung und kombination aus einer feder und einem befestigungselement Download PDF

Info

Publication number
EP3640470A1
EP3640470A1 EP18200493.7A EP18200493A EP3640470A1 EP 3640470 A1 EP3640470 A1 EP 3640470A1 EP 18200493 A EP18200493 A EP 18200493A EP 3640470 A1 EP3640470 A1 EP 3640470A1
Authority
EP
European Patent Office
Prior art keywords
spring
injector
section
longitudinal
fluid injection
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.)
Pending
Application number
EP18200493.7A
Other languages
English (en)
French (fr)
Inventor
Matteo Soriani
Lorenzo Del Rio
Andrea Puccini
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.)
Vitesco Technologies 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 EP18200493.7A priority Critical patent/EP3640470A1/de
Publication of EP3640470A1 publication Critical patent/EP3640470A1/de
Pending legal-status Critical Current

Links

Images

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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa

Definitions

  • the present invention relates to a fluid injection assembly, comprising an injector, a fuel cup and a spring, wherein the spring is arranged between a supporting surface of the injector and a supporting surface of the fuel cup.
  • the present invention relates to a combination, in particular for a valve assembly of an internal combustion engine, wherein the combination includes a spring and a fixing element.
  • Injection valve assemblies are in wide spread use, in particular for internal combustion engines where they may be arranged in order to dose a fluid to a cylinder.
  • a high pressure injector needs to be clamped on the cylinder head in order to ensure an appropriate position of its tip (outlet) inside the combustion chamber.
  • the injector in particular if it is an injector for gasoline direct injection (GDI), after its installation on an engine needs to be pushed down on the cavity at the injector seat of a cylinder in order to be maintained in its correct position, even if a counter pressure from the cylinder and if vibration occurs.
  • GDI gasoline direct injection
  • a spring which is arranged between a supporting surface of an injector and a supporting surface of a fuel cup in order to press down the injector to the cylinder head by an elastic force.
  • a fluid injection assembly is known from EP 1 892 408 B1 , where a spring is shown e.g. in Fig. 3 .
  • Such a spring is usually obtained by fine blanking and bending in order to have a leaf spring shape.
  • the spring itself is complicate to manufacture and must be specifically adapted to each individual fluid injection assembly.
  • such known spring requires a considerable installation space and the assembly is difficult.
  • there is a risk that the elastic force is not evenly distributed along the entire circumference so that the risk of a bending force exists.
  • it is intended to provide a fluid injection assembly which can overcome some or all of the above-described disadvantages.
  • the invention suggests that the spring extends along a longitudinal axis of the spring and that the spring comprises a wire wound around the longitudinal axis of the spring between a first longitudinal end of the spring and a second longitudinal end of the spring. Accordingly, the invention suggests to replace the usually used bending spring by a spring of a very different type which enables a number of advantages.
  • the outline of such component (spring) - compared to the known spring - is minimized in terms of diameter and height.
  • the assembly process step of the proposed design is easier compared to the known technology.
  • the force which is provided by the spring is better distributed along the entire circumference at the injector seat which minimizes the risk of a bending force. Furthermore, in the end the costs of the spring and of the fluid injection assembly can be reduced compared to the prior art.
  • the spring has a helicoidal shape and in particular is a standard helicoidal shape spring.
  • a standard helicoidal shape spring preferably may be a spring in accordance to technical standard like for example the ISO standard (ISO is the abbreviation for International Organization for Standardization).
  • the spring is a pressure spring, in particular a cylinder pressure spring.
  • the first longitudinal end of the spring points in a direction towards the supporting surface of the fuel cup and that the second longitudinal end of the spring points in a direction towards the supporting surface of the injector.
  • the spring at its first longitudinal end is supported directly or indirectly at the fuel cup with regard to a first axial direction and that the spring at its second longitudinal end is supported directly or indirectly at the injector with regard to a second axial direction, which is opposite to the first axial direction.
  • the fluid injection assembly comprises a fuel rail and that the fuel cup is a fuel rail cup which is integrally formed at the fuel rail or which is fixed at the fuel rail.
  • the fuel cup may also be denoted as a fuel rail cup or as a rail cup.
  • the fuel cup may be integrally formed at or fixed at a main gallery of the fuel rail.
  • the fuel cup is an injector cup.
  • the fluid injection assembly comprises a fixing element which has a ring section and a sleeve section ex-tending along a longitudinal axis of the fixing element, wherein the ring section is formed at or fixed to the sleeve section between a first longitudinal section of the sleeve section and a second longitudinal section of the sleeve section and wherein the ring section extends from an outside of the sleeve section in a radially outward direction, wherein the fixing element in particular is made of plastic material.
  • the injector comprises an injector tube, wherein the injector tube is inserted into a hollow space within the spring, wherein at the second longitudinal end of the spring an inner diameter of the spring is bigger compared to an outer diameter of the injector tube so that a longitudinal first annular space is provided, and that the first longitudinal section of the sleeve section is inserted into the first annular space, wherein in particular an outer diameter of the first longitudinal section of the sleeve section corresponds to an inner diameter of the spring and wherein in particular an inner diameter of the first longitudinal sleeve section corresponds to an outer diameter of the injector tube.
  • the second longitudinal section of the sleeve section is inserted longitudinally into a longitudinal second annular space which is provided at the injector, wherein in particular an outer diameter of the second longitudinal section of the sleeve section corresponds to an inner diameter of the second annular space and wherein in particular an inner diameter of the second longitudinal section of the sleeve section corresponds to an outer diameter of the injector tube.
  • the ring section has a first supporting surface extending transversely with regard to the longitudinal axis of the fixing element and a second supporting surface ex-tending transversely with regard to the longitudinal axis of the fixing element and facing opposite to the first supporting surface, wherein the second longitudinal end of the spring is supported against the first supporting surface of the ring element and wherein the second supporting surface of the ring element is sup-ported against the supporting surface of the injector.
  • the fluid injection assembly comprises a fuel rail, wherein the fuel cup is integrally formed at the fuel rail or is fixed at the fuel rail, and that the fluid injection assembly comprises a cylinder head, in particular a cylinder head of an internal combustion engine, wherein the cylinder head comprises an opening and an injector seat surrounding the opening, wherein a fluid outlet of the injector is inserted into the opening of the cylinder head, wherein the injector is supported directly or indirectly at the injector seat with regard to the second axial direction and wherein the spring is assembled in an elastically compressed state between the supporting surface of the fuel cup and the supporting surface of the injector.
  • the fuel rail and the fuel cup may be mounted at the internal combustion engine at a predetermined and fixed distance relative to the injector seat of a cylinder.
  • a ring shoulder which has a first annular surface ex-tending at right angles with a longitudinal axis of the injector and facing an outlet of the injector and the annular surface contacts a second annular surface of the injector seat.
  • the injector is an injector which is adapted to be used for gasoline direct injection (GDI).
  • the invention suggests that the spring extends along a longitudinal axis of the spring, wherein the spring comprises a wire wound around the longitudinal axis of the spring between a first longitudinal end of the spring and a second longitudinal end of the spring, and that the fixing element has a ring section and a sleeve section extending along a longitudinal axis of the fixing element, wherein the ring section is formed at or fixed to the sleeve section between a first longitudinal section of the sleeve section and a second longitudinal section of the sleeve section and wherein the ring section ex-tends from an outside of the sleeve section in a radially outward direction.
  • an outer diameter of the first longitudinal section of the sleeve section corresponds to an inner diameter of the spring.
  • an advantage of the present invention is that the injector holding force may be guaranteed e.g. by a standard helicoidal shape spring to be assembled between a fuel cup (in particular a fuel rail cup) and an injector holding surface.
  • a simple fixing element which could also be denoted by the terms mounting element or aligning element, e.g.
  • mounting element or aligning element e.g.
  • a simple plastic component can be mounted in the inner diameter of the modular power group (including the injector and the spring) of the injector.
  • a preferred embodiment of a fluid injection assembly 1 in accordance to the invention is described with regard to Figs. 1 and 2 . It comprises an injector 2, a fuel cup 3 and a spring 4, wherein the spring 4 is mounted between a supporting surface 5 of the injector 2 and a supporting surface 6 of the fuel cup 3. As also shown by the increased details of Figs. 2 and 3 , the spring 4 extends along a longitudinal axis 7 and the spring 4 comprises a wire 8 which is wound around the longitudinal axis 7 between a first longitudinal end of the spring 4 and a second longitudinal end 10 of the spring 4.
  • the spring 4 has a helicoidal shape and is a standard helicoidal shape spring.
  • the fluid injection assembly 1 comprises a fuel rail 11 having a main gallery 12.
  • the fuel cup 3 is integrally formed at the main gallery 12 and is in fluid communication with the main gallery 12 by a via hole 13.
  • the injector 2 is assembled between the fuel rail 3 and a cylinder head 14 of a cylinder as schematically indicated by Fig. 1 .
  • the injector 2 has a fluid inlet 15 which in the opened state of the injector 2 is in internal fluid communication with a fluid outlet 16 of the injector 2.
  • the fuel rail 11 is mounted by means of a screw (not shown in Fig. 1 ) and by additional components 17 in a predetermined fixed distance from the cylinder head 14.
  • the distance is determined so that the adjacent windings of the spring 4 do not contact each other at least when there are no considerable pressure impulses within the cavity of the cylinder. Further, the distance is determined so that the spring 4 is axially compressed in the assembled state which means that the spring 4 is elastically deformed to a certain degree and hence the spring 4 is axially clamped by its elastic spring force between the fuel cup 3 and the injector 2. Accordingly, the injector 2 by means of this elastic spring force is axially pressed down against an annular injector seat 20 which surrounds an opening 21 which is a fuel inlet of the cylinder head 14. From the description and the figures it follows that in the example the spring 4 is a cylinder pressure spring.
  • the injector 2 comprises an injector tube 18 and an injector body 19 wherein the injector body 19 may e.g. be made of a plastic material or the like.
  • the first longitudinal end 9 of the spring 4 points in direction to-wards the supporting surface 6 of the fuel cup 3 and that the second longitudinal end 10 of the spring 4 points in a direction towards the supporting surface 5 of the injector 2.
  • the spring 4 at its first longitudinal end is axially supported directly against the fuel cup 3 with regard to a first axial direction 22 and the spring 4 at its second longitudinal end is axially supported indirectly by an intermediate fixing element 24 at the injector 2 with regard to a second axial direction 23 which is opposite to the first axial direction 22.
  • the fixing element 24 (which could also be denoted by the terms mounting element or aligning element) is integrally formed and comprises a ring section 25 and a sleeve section 26.
  • the sleeve section 26 extends along a longitudinal axis 27 on the fixing element, which - in the assembled state shown in Fig. 3 - corresponds to the longitudinal axis of the spring 4.
  • the ring section 25 is formed at the outside of the sleeve section 26 between a first longitudinal section 28 of the sleeve section 26 and a second longitudinal section 29 of the sleeve section 26 and extends from the outside of the sleeve section 26 in a radially outward direction.
  • the fixing element is made of plastic material.
  • the injector tube is inserted into a hollow space 30 within the spring 4.
  • an inner diameter 31 of the spring is bigger compared to an outer diameter 32 of the injector tube 18 so that a longitudinal first annular space 33 is provided.
  • the first longitudinal section 28 of the sleeve section 26 is inserted into the first annular space 33.
  • the second longitudinal section 29 of the sleeve section 26 is inserted longitudinally into a longitudinal second annular space 34 which is provided at the injector 2.
  • the ring section 25 has a first supporting surface 34 which extends transversely with regard to the longitudinal axis 27 and a second supporting surface 35 also extending transversely with regard to the longitudinal axis 27 and facing opposite to the first supporting surface 34.
  • the second longitudinal end 10 of the spring 4 is directly supported against the first supporting surface 34 and the second supporting surface 35 of the ring element 25 is directly supported against the supporting surface 5 of the injector 2.
  • the components shown by Fig. 3 form part of a preferred embodiment of a combination 35 in accordance to the second aspect of the present application.
  • the outer diameter of the first longitudinal section 28 of the sleeve section corresponds to the inner diameter of the spring 4.
  • the windings of the spring 4 have a unique diameter.
  • this is not necessary.
  • possible effects and advantages reference is made to the above description with regard to the fluid injection assembly 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP18200493.7A 2018-10-15 2018-10-15 Fluideinspritzanordnung und kombination aus einer feder und einem befestigungselement Pending EP3640470A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18200493.7A EP3640470A1 (de) 2018-10-15 2018-10-15 Fluideinspritzanordnung und kombination aus einer feder und einem befestigungselement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18200493.7A EP3640470A1 (de) 2018-10-15 2018-10-15 Fluideinspritzanordnung und kombination aus einer feder und einem befestigungselement

Publications (1)

Publication Number Publication Date
EP3640470A1 true EP3640470A1 (de) 2020-04-22

Family

ID=63862053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18200493.7A Pending EP3640470A1 (de) 2018-10-15 2018-10-15 Fluideinspritzanordnung und kombination aus einer feder und einem befestigungselement

Country Status (1)

Country Link
EP (1) EP3640470A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2776025A1 (fr) * 1998-03-11 1999-09-17 Peugeot Ensemble d'injection de carburant dans un moteur a combustion interne et a injection directe
US6148797A (en) * 1997-12-17 2000-11-21 Robert Bosch Gmbh Mounting device for mounting fuel injection valves
EP2077390A1 (de) * 2008-01-07 2009-07-08 Continental Automotive GmbH Kupplungsanordnung und Verbindungsanordnung
EP1892408B1 (de) 2006-08-21 2009-10-21 Continental Automotive GmbH Injektor, Kraftstoffzulaufbecher sowie Halter
US20100154746A1 (en) * 2008-12-22 2010-06-24 Michael Fischer Fuel-injection device
US20130269646A1 (en) * 2012-04-17 2013-10-17 Robert Bosch Gmbh Device for holding down a valve for metering fuel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6148797A (en) * 1997-12-17 2000-11-21 Robert Bosch Gmbh Mounting device for mounting fuel injection valves
FR2776025A1 (fr) * 1998-03-11 1999-09-17 Peugeot Ensemble d'injection de carburant dans un moteur a combustion interne et a injection directe
EP1892408B1 (de) 2006-08-21 2009-10-21 Continental Automotive GmbH Injektor, Kraftstoffzulaufbecher sowie Halter
EP2077390A1 (de) * 2008-01-07 2009-07-08 Continental Automotive GmbH Kupplungsanordnung und Verbindungsanordnung
US20100154746A1 (en) * 2008-12-22 2010-06-24 Michael Fischer Fuel-injection device
US20130269646A1 (en) * 2012-04-17 2013-10-17 Robert Bosch Gmbh Device for holding down a valve for metering fuel

Similar Documents

Publication Publication Date Title
EP2221469B1 (de) Befestigungselement und Fluidinjektoranordnung
US8215289B2 (en) Fuel-injection device
US20190211789A1 (en) Check Valve, High-Pressure Component, and High-Pressure Fuel Pump
EP1892408A1 (de) Injektor, Kraftstoffzulaufbecher sowie Halter
EP2495427B1 (de) Kupplungsvorrichtung
EP2151572A2 (de) Kraftstoffeinspritzklemme mit oberer Montage
KR20020087491A (ko) 연료 분사 밸브용 밀봉 장치
DE10108467A1 (de) Befestigungsvorrichtung
EP2241745B1 (de) Kupplungsvorrichtung
US7377264B2 (en) Fuel injector
US8353422B2 (en) Fuel delivery module
US6923162B2 (en) Securing sleeve for a fuel injection system
US9803605B2 (en) Fluid injection assembly
EP3640470A1 (de) Fluideinspritzanordnung und kombination aus einer feder und einem befestigungselement
CN107420237B (zh) 用于内燃发动机的燃料输送组件
EP3017192A1 (de) Hochdruckpumpe
DE102014202334A1 (de) Hochdruckpumpe für ein Kraftstoffeinspritzsystem
US9091237B2 (en) Injector for a fluid
EP3274583B1 (de) Steuerventilanordnung
EP1862668A1 (de) Verbinder und Verbundanordnung
CN111271201B (zh) 燃料喷射阀
US10197031B2 (en) Fuel rail assembly
EP1260706B1 (de) Befestigungseinrichtung eines Injektors einer Kraftstoffeinspritzeinrichtung an einer Brennkraftmaschine
CN110546374A (zh) 燃料泵
US9567958B2 (en) Fuel injection system having a fuel-carrying component, a fuel injector and a connecting element

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VITESCO TECHNOLOGIES GMBH

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20201022

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20211022

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VITESCO TECHNOLOGIES GMBH

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230530