EP1126161A1 - Dispositif d'injection - Google Patents

Dispositif d'injection Download PDF

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Publication number
EP1126161A1
EP1126161A1 EP01103365A EP01103365A EP1126161A1 EP 1126161 A1 EP1126161 A1 EP 1126161A1 EP 01103365 A EP01103365 A EP 01103365A EP 01103365 A EP01103365 A EP 01103365A EP 1126161 A1 EP1126161 A1 EP 1126161A1
Authority
EP
European Patent Office
Prior art keywords
fuel
injection system
injector body
coupling element
line
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
EP01103365A
Other languages
German (de)
English (en)
Other versions
EP1126161B1 (fr
Inventor
Uwe Dr. Lingener
Jürgen Rink
Klaus Rübling
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1126161A1 publication Critical patent/EP1126161A1/fr
Application granted granted Critical
Publication of EP1126161B1 publication Critical patent/EP1126161B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M55/025—Common 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
    • 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

Definitions

  • the invention relates to an injection system with a fuel accumulator according to the preamble of claim 1.
  • Injection systems with a fuel reservoir are used, for example, in modern diesel injection systems used.
  • From DE 197 39 810 Cl is an injection system for an internal combustion engine known in which a connecting element with a End on the injector and the other end on one Connection point of the fuel tank is screwed. there is the connecting element on the injector in a hole screwed with an internal thread and at the connection point of the Fuel tank attached with a union nut.
  • Component tolerances can include material stresses or Cause difficulties during assembly.
  • the object of the invention is to provide a direct connection between a fuel accumulator and a fuel injector to create when balancing connection tolerances can be.
  • the object of the invention is characterized by the features of the independent Claim resolved.
  • the object of the invention is a fuel accumulator and a fuel injector via a connector connect with each other.
  • the injector body of the fuel injector and the fuel accumulator each encompassed by a coupling element.
  • the two Union elements are on their radial connections connected to each other and include the connecting element.
  • the injector body is connected via the connecting element the fuel storage system via just a few connection points pressure-tight connected, the component tolerances by the connection, which can be easily twisted around several axes can be compensated.
  • connections are Union elements connected by a sleeve-shaped nut, which has two opposing internal threads on its end faces.
  • the figure shows an injection system with a direct connection between a fuel accumulator and a fuel injector.
  • the preferably cylindrical injector body 7 has an inlet 3 on the side, which has a hollow cylindrical Connecting element 13 connected to the fuel accumulator 8 is.
  • the fuel accumulator 8 is hollow cylindrical and points in its hollow cylindrical recess is a distributor line 5 on, which is essentially the entire length of the Fuel storage 8 extends.
  • Several connecting lines, shown in the figure as an example by the connecting line 6, are radially starting from the distribution line 5 in introduced the jacket of the fuel accumulator 8 and break through its outer wall.
  • the connecting element 13 is hollow cylindrical formed, the cylindrical recess represents the connecting line 4, which is the connecting line 6 connects to the inlet 3 of the injector body 7.
  • a hollow cylindrical first coupling element 9 comprises the Fuel reservoir 8 parallel to its longitudinal axis in height the corresponding connecting line 6.
  • a hollow cylindrical first port 1 closes with its one saddle-shaped trained end face flush with the jacket of the first coupling element 9 and is radial to the longitudinal axis of the first coupling element 9 arranged. The cylindrical recesses of the first connection 1 and the first coupling element 9 due to an opening in the jacket of the first coupling element 9 connected to each other.
  • the connecting element 13 In the cylindrical recess of the first connection 1 is the connecting element 13 arranged, and in the cylindrical The recess of the first coupling element 9 is the fuel accumulator 8 arranged.
  • a hollow cylindrical second coupling element 10 comprises the Injector body 7 parallel to its longitudinal axis at the level of Inlet 3.
  • a hollow cylindrical second connection 2 closes with its one saddle-shaped front end flush to the jacket of the second coupling element 10 and is radial arranged to its longitudinal axis.
  • the cylindrical recesses of the second connection 2 and the second coupling element 10 are through an opening in the jacket of the second Coupling element 10 connected to each other.
  • a sleeve-shaped Lanyard hereinafter referred to as double nut 14 preferably has one on each of its inner walls and the second connection 1, 2 associated thread with each other opposite directions of rotation.
  • the two connections move 1 and 2 and thereby also the fuel distributor 8 and the injector body 7 towards each other.
  • the connecting element 13 is thereby axially biased to pressure, its two sealing surfaces 11 and 12 against those assigned to them Mating surfaces on the outer wall of the fuel distributor 8 or of the injector body 7 are pressed.
  • the connecting line 6 and the connecting line 4 and the Lead 3 and the connecting line 4 are through the Surface pressure on the first and second sealing surfaces 11, 12 sealed.
  • the fuel is brought to high pressure by a high pressure pump compressed and via the distribution line 5 to the individual Distributed fuel injectors.
  • the fuel flows via the distribution line 5, the connecting line 6, the connecting line 4, the supply line 3 into the fuel injection valve, by putting the fuel in through injection holes the combustion chamber of an internal combustion engine is injected.
  • the two sealing surfaces 11, 12 are spherical-convex, preferably spherical.
  • the assigned to the sealing surfaces 11, 12 Counter surfaces of the fuel accumulator 8 respectively of the injector body 7 correspond to the sealing surfaces 11, 12 specially shaped and concave.
  • the two sealing surfaces 11, 12 are preferably spherical educated.
  • the center of the spherical surface of the sealing surface 11 meets the center of the spherical surface of the sealing surface 12 on the longitudinal axis of the connecting element 13 in a common Center M together (instantaneous pole) so that the Sealing effect even with components that are slightly shifted towards each other 7,8,13 because of the constant shape of the between the Components 7.13 and 8.13 existing sealing contact surface preserved.
  • the sum of the radii of the spherical surfaces of the two sealing surfaces 11, 12 is thus approximately equal to the length of the Connecting element 13.
  • the fuel accumulator 8 and the injector body 7 are about the connecting element 13 connected to a unit by pushed the first coupling element 9 over the fuel accumulator 8 and the second coupling element 10 over the injector body 7 is pushed.
  • the connecting element 13 is pushed into the respective connections 1, 2 and the double nut 15 screwed over their external thread. Through the screw connection the double nut 14 move the two connections 1, 2 axially towards each other and brace the fuel accumulator 8 and the injector body 7 via the connecting element 13 with each other.
  • the fuel accumulator 8 and the injector body 7 is also slightly rotated about its longitudinal axis or be mounted axially offset, which also with larger component tolerances the tightness of the sealing surfaces 11.12 and the ability to assemble is retained.
  • the cylindrical recesses of the first coupling element 9, of the second coupling element 10 and the two connections 1, 2 point relative to the outer walls of the fuel accumulator 8, of the connecting element 13 and the injector body 7 enough Play so that the fuel accumulator 8 and the injector body 7 rotated axially or mounted offset can be used to compensate for component tolerances.
  • Component tolerances directed axially to the connecting element 13 are due to the elasticity of the fuel accumulator 8 balanced across its longitudinal axis.
  • connection system between the fuel accumulator 8 and the injector body 7 advantageously has a small number of sealing surfaces (two) with a short connecting line 4 between the fuel accumulator 8 and the injector body 7 on. Furthermore, the connection system tolerates advantageously Component tolerances in several spatial directions.
  • One of the end faces of the fuel accumulator 8 can be directly connected to the pump housing of a high pressure pump, so that an advantageous compact unit is created, the component tolerances tolerated.
  • the high pressure pump compresses fuel to high pressure and delivers the fuel via the distribution line 5, the connecting line 6, the connecting line 6 and the inlet 3 to the fuel injector, which uses the fuel as required injected into the combustion chamber of an internal combustion engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP01103365A 2000-02-15 2001-02-13 Dispositif d'injection Expired - Lifetime EP1126161B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000106658 DE10006658B4 (de) 2000-02-15 2000-02-15 Einspritzanlage
DE10006658 2000-02-15

Publications (2)

Publication Number Publication Date
EP1126161A1 true EP1126161A1 (fr) 2001-08-22
EP1126161B1 EP1126161B1 (fr) 2007-05-30

Family

ID=7630957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01103365A Expired - Lifetime EP1126161B1 (fr) 2000-02-15 2001-02-13 Dispositif d'injection

Country Status (2)

Country Link
EP (1) EP1126161B1 (fr)
DE (2) DE10006658B4 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1300584A1 (fr) * 2001-10-04 2003-04-09 Renault S.A. Dispositif d'alimentation en carburant pour moteur à combustion interne
EP1217202B1 (fr) * 2000-12-22 2008-06-25 Renault s.a.s. Procédé et dispositif d'amortissement des ondes de pression dans un système d'injection à rampe commune
US8042519B2 (en) 2009-07-31 2011-10-25 Ford Global Technologies, Llc Common rail fuel system with integrated diverter
CN105917110A (zh) * 2014-01-15 2016-08-31 罗伯特·博世有限公司 具有引导燃料的部件、燃料喷射阀和连接装置的燃料喷射设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005003519A1 (de) * 2005-01-25 2006-08-03 Benteler Automobiltechnik Gmbh Verbindungsanordnung für Rohre
DE102015205170A1 (de) 2015-03-23 2016-09-29 Bayerische Motoren Werke Aktiengesellschaft Kraftstoffeinspritzvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3737505A1 (de) * 1986-11-07 1988-05-11 Lucas Ind Plc Brennstoffeinspritzduese
US5169182A (en) * 1990-05-22 1992-12-08 Usui Kokusai Sangyo Kaisha Ltd. Branch connection in a high pressure fuel rail with gasket
JPH08319921A (ja) * 1995-05-29 1996-12-03 Isuzu Motors Ltd コモンレール式燃料噴射装置
DE19739810C1 (de) 1997-09-10 1998-12-03 Siemens Ag Einspritzsystem für eine Brennkraftmaschine
GB2332927A (en) * 1997-12-30 1999-07-07 Perkins Engines Co Ltd High-pressure fuel supply connector, with leakage provision, for a side-feed fuel injector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19606946C2 (de) * 1996-02-23 1998-02-19 Mtu Friedrichshafen Gmbh Anschlußverbindung einer Kraftstoffhochdruckleitung an eine ortsfeste Anschlußstelle
DE19754132B4 (de) * 1997-12-05 2005-06-23 Man Nutzfahrzeuge Ag Common Rail Einspritzsystem für Brennkraftmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3737505A1 (de) * 1986-11-07 1988-05-11 Lucas Ind Plc Brennstoffeinspritzduese
US5169182A (en) * 1990-05-22 1992-12-08 Usui Kokusai Sangyo Kaisha Ltd. Branch connection in a high pressure fuel rail with gasket
JPH08319921A (ja) * 1995-05-29 1996-12-03 Isuzu Motors Ltd コモンレール式燃料噴射装置
DE19739810C1 (de) 1997-09-10 1998-12-03 Siemens Ag Einspritzsystem für eine Brennkraftmaschine
GB2332927A (en) * 1997-12-30 1999-07-07 Perkins Engines Co Ltd High-pressure fuel supply connector, with leakage provision, for a side-feed fuel injector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 04 30 April 1997 (1997-04-30) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217202B1 (fr) * 2000-12-22 2008-06-25 Renault s.a.s. Procédé et dispositif d'amortissement des ondes de pression dans un système d'injection à rampe commune
EP1300584A1 (fr) * 2001-10-04 2003-04-09 Renault S.A. Dispositif d'alimentation en carburant pour moteur à combustion interne
US8042519B2 (en) 2009-07-31 2011-10-25 Ford Global Technologies, Llc Common rail fuel system with integrated diverter
CN105917110A (zh) * 2014-01-15 2016-08-31 罗伯特·博世有限公司 具有引导燃料的部件、燃料喷射阀和连接装置的燃料喷射设备
CN105917110B (zh) * 2014-01-15 2019-11-29 罗伯特·博世有限公司 具有引导燃料的部件、燃料喷射阀和连接装置的燃料喷射设备

Also Published As

Publication number Publication date
EP1126161B1 (fr) 2007-05-30
DE10006658B4 (de) 2004-08-26
DE10006658A1 (de) 2001-09-06
DE50112538D1 (de) 2007-07-12

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