EP1544455B1 - Injecteur à combustible - Google Patents

Injecteur à combustible Download PDF

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Publication number
EP1544455B1
EP1544455B1 EP20040105650 EP04105650A EP1544455B1 EP 1544455 B1 EP1544455 B1 EP 1544455B1 EP 20040105650 EP20040105650 EP 20040105650 EP 04105650 A EP04105650 A EP 04105650A EP 1544455 B1 EP1544455 B1 EP 1544455B1
Authority
EP
European Patent Office
Prior art keywords
section
fuel injection
injection valve
elevation
hold
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.)
Not-in-force
Application number
EP20040105650
Other languages
German (de)
English (en)
Other versions
EP1544455A2 (fr
EP1544455A3 (fr
Inventor
Andreas Eckbauer
Bernd Hollerbaum
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 EP1544455A2 publication Critical patent/EP1544455A2/fr
Publication of EP1544455A3 publication Critical patent/EP1544455A3/fr
Application granted granted Critical
Publication of EP1544455B1 publication Critical patent/EP1544455B1/fr
Anticipated expiration legal-status Critical
Not-in-force 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
    • F02M55/02—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
    • 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
    • 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

Definitions

  • the invention relates to a fuel injection system according to the preamble of the main claim.
  • a fuel injection system with a fuel distribution line, a tubular intermediate piece with two annular seals, a sleeve-shaped securing element and a clamping claw known.
  • the fuel distribution line opens via the intermediate piece in the fuel injection valve, wherein the intermediate piece is axially displaceable and thereby an axial clearance is possible.
  • the securing element limits the axial play.
  • the clamping claw presses the fuel injection valve against a cylinder head via a flange formed on the fuel injection valve. The clamping claw is attached separately from the fuel rail to the cylinder head and is supported on this.
  • a disadvantage of the fuel injection valve known from the above document is in particular that the assembly cost is unfavorably high in the assembly of the fuel injection valve with the fuel distribution line. By the high number of necessary for the attachment and fuel supply components and the production costs are increased.
  • the spring clip includes a first portion having a bridge connecting two spaced-apart and S-shaped bent finger portions to span a body portion of the valve.
  • the spring clamp is intended to hold a fuel injector and rail cup together, allowing the fuel injector to push in the direction of the engine head.
  • the spring clamp is biased during installation and applies a spring force ranging from a minimum force to a maximum force when the clamp is compressed.
  • the spring clamp is designed to prevent overload of the injector at the maximum force while being fixed with a maximum elastic load.
  • the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that the assembly of the fuel injection system can be done much easier and the necessary components can be made easier and with less manufacturing effort and are reduced in number.
  • the hold-down section is supported directly on the allocation section.
  • the bias voltage generated by the hold-down portion can be determined very accurately by the position of the allocation portion.
  • the hold-down portion has a receiving opening, which opens out of a survey, wherein the survey is shaped so that the survey at least partially embracing upper portion is positively against the survey joined positively.
  • the hold-down portion can be mounted simplified with respect to a certain angle about the longitudinal axis of the receiving opening and aligned permanently.
  • the survey has a nose and / or is oval shaped.
  • a rotation-proof geometry of the survey can be generated in a simple manner, which also simplifies the installation of the hold-down with the survey.
  • the lower section has spring arms with positioning surfaces.
  • the positioning surfaces advantageously engage in an exact fit in a coding section arranged on the fuel injection valve, wherein the coding section, together with the position of the positioning surfaces, determines the angle of rotation or the installation position of the fuel injection valve with respect to its orientation about the longitudinal axis.
  • An in Fig. 1 illustrated embodiment of the fuel injection system according to the invention is used in particular for elastic hold down a fuel injection valve 3 and for supplying fuel to the fuel injection valve 3 and has an allocation section 1 and a hold-down section 2.
  • the fuel injection valve 3 is supplied with pressurized fuel.
  • the hold-down section 2 the fuel injection valve 3 is biased against an example formed on a cylinder head, not shown bearing surface.
  • the force which acts on the fuel injection valve 3 through the hold-down section 2, for example, is greater than a force acting on the fuel injection valve 3 in a combustion chamber, not shown.
  • the hold-down portion 2 is elastic and can thereby compensate for the occurring axial tolerances. Pressure surges or pressure fluctuations, which act axially, for example, from the combustion chamber, not shown, on the fuel injection valve 3, can be absorbed elastic gentle material, for example, an elastic seal, not shown, reliably seals the combustion chamber in axial play.
  • the allocation portion 1 has a plurality of bores 8 for receiving connecting elements, not shown, wherein the bores 8 are partially formed on the allocation portion 1 formed flanges 7 and extend in the embodiment with their longitudinal axes parallel to the longitudinal axis of a receiving opening 6.
  • the allocation section 1 consists in the embodiment shown of a tubular line section 4 and a connection section 5.
  • the connection section 5 has on its underside 9 a survey 10, from which the receiving opening 6 opens to receive the inflow-side end of the fuel injection valve 3.
  • the mouth of the receiving opening 6 is offset by the elevation 10 of the surrounding bottom 9 and protrudes from the bottom 9 of the connecting portion. 5 out.
  • the elevation 10 is formed, for example, by the formation of a nose 15 or by an oval shape stretched in one direction.
  • the hold-down portion 2 is permanently elastic, for example, made of spring steel and U-shaped.
  • the staple-like shape of the hold-down portion 2 has an upper portion 11 facing the terminal portion 5 and a lower portion 12 opposite the upper portion 11, which is further away from the terminal portion 5 than the upper portion 11.
  • the upper portion 11 bifurcates in two parallel to each other extending upper spring arms 13 and the lower portion 12 forks into two mutually parallel lower spring arms 14.
  • the upper spring arms 13 are each slightly elastically movable away from each other as the lower spring arms 14.
  • the hold-down section 2 is already mounted on the connection section 5, wherein the upper spring arms 13 embrace the survey 10, for example, with a bias voltage.
  • the inner shape of the upper spring arms 13 is adapted to the shape of the elevation 10.
  • the upper spring arms 13 can advantageously act with a bias radially on the elevation 10, whereby the hold-down portion 2 is joined non-positively in the axial direction and radial direction with the survey 10.
  • the hold-down section 2 is pushed radially, for example, for mounting on the survey 10 and deducted for disassembly axially.
  • the lower spring arms 14 have at their sides facing each other positioning surfaces 16.
  • the shape of a lying in the region of the inflow-side end of the fuel injection valve 3 Kodierabitess 19, engages in the lower spring arms 14, is formed so that the fuel injection valve 3 with respect to a rotation angle or more rotational angle about the longitudinal axis of the fuel injection valve 3 is precisely aligned, or can be installed only aligned.
  • the positioning surfaces 16 secure a rotation of the fuel injection valve 3 about its longitudinal axis by positive engagement.
  • the center of the lower spring arms 14 advantageously have a cap 17 through which the lower spring arms 14 are bent away in the middle of the receiving opening 6.
  • Fig. 2 clearly visible surround in this figure, the lower spring arms 14 the inflow-side region of the fuel injection valve 3.
  • the Kodierabites 19 is shaped according to the shape of the two positioning surfaces 16 and is ideally to this exact fit. In this case, the fuel injection valve 3 is secured against rotation about its longitudinal axis.
  • the lower portion 12 In the mounted state of the fuel injection system according to the invention, for example, on a cylinder head, not shown, the lower portion 12 is biased against the fuel injection valve 3 and presses on a fuel injection valve 3 fixed support ring 18, wherein the hold-down portion 2 at the allocation section 1 on the upper portion 11th supported.
  • the support ring 18 and the coding section 19 are made in one piece in the embodiment shown.
  • for vibration damping can be arranged between the upper portion 11 and the bottom 9, not shown permanently elastic intermediate layer.
  • the lower portion 12 is slightly moved during assembly against the upper portion 11, whereby the lower portion 12 elastically biases against the fuel injection valve 3. Through the calotte 17, with the lower portion 12 preferably rests on the support ring 18, it is prevented that radially directed forces acting on the fuel injection valve 3.
  • Fig. 3 shows a possible embodiment of the Kodierabitess 19 of the fuel injection valve 3.
  • the coding section 19 has two tangential to the longitudinal axis 21 of the fuel injection valve 3 and straight incisions 20 which extend parallel to each other in the embodiment.
  • the coding portion 19 may be integral or separate with the fuel injection valve 3, for example, as a sleeve, not shown, which is for example pressed or welded to the fuel injection valve 3 in the desired position.

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. Système d'injection de carburant comprenant au moins une soupape d'injection de carburant (3), une portion de dosage (1) qui présente une portion de raccordement (5) et une portion de conduite (4), avec laquelle du carburant est acheminé à la soupape d'injection de carburant (3), et une portion de maintien vers le bas (2), pour le maintien élastique vers le bas de la soupape d'injection de carburant (3), la portion de maintien vers le bas (2) s'appuyant contre la portion de dosage (1),
    caractérisé en ce que
    la portion de maintien vers le bas (2) est réalisée en forme de U, la portion de maintien vers le bas (2) présentant une portion supérieure (11) orientée vers la portion de raccordement (5) et une portion inférieure (12) opposée à la portion supérieure (11), qui est plus éloignée de la portion de raccordement (5) que la portion supérieure (11), la portion supérieure (11) se divisant en deux bras de ressort supérieurs s'étendant parallèlement l'un à l'autre (13) et la portion inférieure (12) se divisant en deux bras de ressort inférieurs s'étendant parallèlement l'un à l'autre (14) et
    en ce que la portion de dosage (1) présente un rehaussement (10) et une ouverture de réception (6) pour recevoir l'extrémité du côté de l'afflux de la soupape d'injection de carburant (3) débouche hors du rehaussement (10) et
    la portion supérieure (11) vient en prise autour du rehaussement (10).
  2. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    la portion de maintien vers le bas (2) s'appuie directement contre la portion de dosage (1).
  3. Système d'injection de carburant selon la revendication 1,
    caractérisé en ce que
    le rehaussement (10) est formé de telle sorte que la portion supérieure (11) venant en prise radialement au moins partiellement autour du rehaussement (10) est assemblée de manière imperdable au rehaussement (10) par engagement positif.
  4. Système d'injection de carburant selon la revendication 3,
    caractérisé en ce que
    le rehaussement (10) présente un nez (15) et/ou est formé au moins en partie sous forme ovale.
  5. Système d'injection de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    les bras de ressort inférieurs (14) présentent des surfaces de positionnement (16).
  6. Système d'injection de carburant selon la revendication 5,
    caractérisé en ce que
    les surfaces de positionnement (16) viennent en prise par ajustement serré dans une portion de codage (19) de la soupape d'injection de carburant (3), la portion de codage (19) et les surfaces de positionnement (16) définissant l'angle de rotation ou la position de montage de la soupape d'injection de carburant (3) par rapport à son orientation autour de son axe longitudinal (21).
EP20040105650 2003-12-16 2004-11-10 Injecteur à combustible Not-in-force EP1544455B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003158912 DE10358912A1 (de) 2003-12-16 2003-12-16 Brennstoffeinspritzsystem
DE10358912 2003-12-16

Publications (3)

Publication Number Publication Date
EP1544455A2 EP1544455A2 (fr) 2005-06-22
EP1544455A3 EP1544455A3 (fr) 2006-03-15
EP1544455B1 true EP1544455B1 (fr) 2011-02-16

Family

ID=34485406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040105650 Not-in-force EP1544455B1 (fr) 2003-12-16 2004-11-10 Injecteur à combustible

Country Status (2)

Country Link
EP (1) EP1544455B1 (fr)
DE (2) DE10358912A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004048401A1 (de) * 2004-10-01 2006-04-06 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung und Brennstoffeinspritzvorrichtung
DE102010017725B4 (de) 2010-07-05 2018-05-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Einspritzanordnung für eine Brennkraftmaschine eines Kraftfahrzeugs
JP5822272B2 (ja) * 2012-02-27 2015-11-24 株式会社ケーヒン 燃料噴射弁の支持構造
DE102018218711A1 (de) 2018-10-31 2020-04-30 Robert Bosch Gmbh Niederhalter für eine Brennstoffeinspritzvorrichtung
JP7339839B2 (ja) * 2019-10-07 2023-09-06 Ckd株式会社 電磁弁

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19735665A1 (de) 1997-06-25 1999-01-07 Bosch Gmbh Robert Brennstoffeinspritzanlage
US5970953A (en) * 1999-01-12 1999-10-26 Siemens Automotive Corporation High pressure injector clip
DE10152421A1 (de) * 2001-10-24 2003-06-18 Bosch Gmbh Robert Befestigungsvorrichtung
DE10163030B4 (de) * 2001-12-20 2014-10-09 Robert Bosch Gmbh Befestigungsvorrichtung
JP3997946B2 (ja) * 2002-07-26 2007-10-24 株式会社デンソー 燃料供給装置
DE10256668A1 (de) * 2002-12-04 2004-07-29 Robert Bosch Gmbh Stützelement

Also Published As

Publication number Publication date
EP1544455A2 (fr) 2005-06-22
DE502004012192D1 (de) 2011-03-31
DE10358912A1 (de) 2005-09-08
EP1544455A3 (fr) 2006-03-15

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