EP1181445B1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP1181445B1
EP1181445B1 EP01909417A EP01909417A EP1181445B1 EP 1181445 B1 EP1181445 B1 EP 1181445B1 EP 01909417 A EP01909417 A EP 01909417A EP 01909417 A EP01909417 A EP 01909417A EP 1181445 B1 EP1181445 B1 EP 1181445B1
Authority
EP
European Patent Office
Prior art keywords
valve
sealing surface
fuel injection
valve seat
seat
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.)
Expired - Lifetime
Application number
EP01909417A
Other languages
German (de)
English (en)
Other versions
EP1181445A2 (fr
Inventor
Friedrich Boecking
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 EP1181445A2 publication Critical patent/EP1181445A2/fr
Application granted granted Critical
Publication of EP1181445B1 publication Critical patent/EP1181445B1/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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/047—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being formed by deformable nozzle parts, e.g. flexible plates or discs with fuel discharge orifices

Definitions

  • the invention is based on a fuel injection valve for Internal combustion engine according to the preamble of claim 1 out.
  • a fuel injection valve is out of Publication DE 196 08 575 known.
  • At the combustion chamber side End of the valve member is a substantially conical Tip formed. This top is in two sections divided, wherein the peak cone angle of the outer, combustion chamber facing portion larger than that of the inner, the valve member facing portion. Thereby is on the lateral surface of the valve member tip a circumferential Ring edge formed as a sealing surface.
  • the valve member is designed in a blind bore Bore arranged, wherein the combustion chamber facing, closed End is designed as a valve seat, the substantially has a conical shape.
  • the valve seat is at least an injection port is formed, which is the interior of the Valve with lifted from the valve seat valve member with the Combustion chamber connects.
  • Valve member In the closed position of the fuel injection valve comes Valve member with its valve sealing surface on the valve seat for Investment.
  • the cone angle of the valve seat is dimensioned that the valve member substantially only with the annular edge sits on the valve seat. This results on the one hand a good seal of the pressure chamber against the injection openings but on the other hand the problem that it is due to the high Surface pressure over time to deformations on valve member and valve seat comes.
  • the annular edge and / or the valve seat deform, resulting in the effective seat diameter of the valve member changes. This changes also the effective flow area of the fuel injection valve and the size of the exposed areas on the Valve member, which affects the fuel injection history and the injection accuracy adversely affects. This problem is e.g. from the document US Pat. No. 5,890,660 A.
  • valve sealing surface bearing part of Valve member tip formed as a resilient ring collar is, whereby in the closed position of the valve member of the valve sealing surface bearing part after initial line contact flat against the valve seat.
  • the outer edge of the annular collar defines a fixed seat diameter. Due to the increasing contact surface of the valve member At the valve seat is a relatively low surface pressure in Given area of the valve seat, resulting in low wear leads in this area. The seat diameter thus remains constant over the life of the fuel injector.
  • valve sealing surface partially undercut by the annular groove, so that the Ring collar reinforced lip-shaped and the Deformation work of the ring collar is reduced.
  • FIG. 1 shows a longitudinal section through a valve body with valve member
  • Figure 2 is an enlarged section of Figure 1 in the region of the valve seat
  • Figure 3 is an enlarged Section of Figure 2 in the region of the valve sealing surface.
  • FIG. 1 is a longitudinal section through an embodiment of the fuel injection valve according to the invention.
  • a valve body 1 the combustion chamber facing away from the end face in installation position, at least indirectly on one in the Drawing not shown valve holding body to the plant comes has a bore 5 designed as a blind bore.
  • the bottom surface is formed as a valve seat 11 and approximately conical with a cone angle ⁇ , where the Inner diameter of the valve seat 11 to the combustion chamber down.
  • At the valve seat 11 is at least one injection port 13 formed, the bore 5 with the combustion chamber combines.
  • a piston-shaped valve member 7 is arranged, that with a larger diameter, the combustion chamber remote portion is guided in the bore 5 and the to form a pressure shoulder 15 the combustion chamber into a in the smaller diameter valve member shaft 7 'passes.
  • a pressure chamber 17 is formed, the valve member 7 and the pressure shoulder 15 surrounds and to the valve seat 11th enough.
  • the pressure chamber 17 opens in the valve body. 1 trained inlet channel 21, via which the pressure chamber 17 with Fuel can be filled under high pressure.
  • valve member shaft 7 At the combustion chamber end of the valve member shaft 7 'goes in a valve member tip 30 via whose outer circumferential surface approximately is cone-shaped and a valve sealing surface. 9 forms, which cooperates with the valve seat 11.
  • the valve member 7 is not due to the force of one in the drawing illustrated closing spring with the valve sealing surface 9 against the valve seat 11 pressed so that in this closed position the injection port 13 through the valve sealing surface 9 against the pressure chamber 17 is sealed.
  • FIG. 2 shows an enlargement of that shown in FIG Fuel injection valve in the region of the valve seat 11 shown in the closed position.
  • the lateral surface of the valve member tip 30 is divided into two sections, which by a Ring groove 25 are separated from each other.
  • the end of the Valve member 7 forming the first valve member portion 30 a has a conical surface with a cone angle ⁇ on while the second valve member portion 30b, the to the side of the valve member 7 'connects to the annular groove 25, has a frustoconical surface with a cone angle ⁇ .
  • the cone angle ⁇ is greater than the cone angle ⁇ , and the two sections of the valve member tip 30 are formed so that only the lateral surface the second frusto-conical valve member portion 30b the valve sealing surface 9 carries.
  • annular groove 23 is formed, which is the valve sealing surface 9 supporting second valve member portion 30b macinflammatory and preferably designed to be the section Partially undercut 30b. This will make a ring collar 28 formed, which is resilient and so when plant to the valve seat 11 under the action of the closing force deforming the valve seat 11 can adapt.
  • the am Transition of the two valve member sections 30a, 30b of the valve member tip 30 arranged annular groove 25 provides for a better fuel distribution in the volume between the valve member tip 30 and the valve seat 11, if provided, to arrange more than one injection port 13 on the valve seat 11.
  • the annular groove 25 is located upstream of the laxative Injection openings 13.
  • FIG 3 is an enlargement of the valve member 7 in the area the valve sealing surface 9 shown.
  • the lateral surface of the Ring collar 28 has an opening angle ⁇ , which is not is equal, but slightly larger than the cone angle ⁇ of the Valve seat 11.
  • the difference angle ⁇ is dimensioned in this case that the annular collar 28, in the closed position of the valve member 7 by the force of the closing spring against the valve seat 11 is pressed, purely elastic perpendicular to the surface of the valve seat 11 can spring inwards and so flat on Valve seat 11 is present.
  • the springs are supported by that a part of the valve sealing surface 9 through the annular groove 23rd is undercut, so that at the base of the ring collar forms a reduced cross section.
  • the sealing edge 34, the combustion chamber facing away from the edge Valve sealing surface 9 forms, is characterized by this configuration not pressed into the valve seat 11, as the full force the closing spring only after the deformation on the valve seat 11 acts.
  • the diameter of the first contact of the valve member 7 with the valve seat 11 remains unchanged.
  • valve member 7 During the closing movement of the valve member 7 on the valve seat 11 comes to first the sealing edge 34 on the valve seat 11th to the plant. Due to the force of the closing spring, the valve member 7 further pressed on the valve seat 11, so that the Ring collar 28 is pressed inwards until the entire, frusto-conical Valve sealing surface 9 on the valve seat 11 for Plant comes.
  • valve member tip 30 by a ring groove in two Divide valve member sections 30a, 30b may as well be provided that the annular groove 25 is omitted, resulting in by the different cone angle of the two valve member sections 30a, 30b an annular edge at the transition forms.

Landscapes

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

Claims (6)

  1. Injecteur de carburant de moteur à combustion interne comportant un corps d'injecteur (1) muni d'un perçage (5) recevant une aiguille d'injecteur (7) en forme de piston, mobile axialement contre une force de fermeture,
    cette aiguille d'injecteur (7) étant guidée dans un segment du perçage (5) à l'opposé de la chambre de combustion rejoint par une réduction de section, du côté de la chambre de combustion, une tige d'aiguille (7') venant dans la chambre annulaire en forme de chambre de pression (17) entre le perçage (5) et la tige (7') d'aiguille d'injecteur et
    une pointe (30) d'aiguille d'injecteur réalisée à l'extrémité de la tige d'aiguille (7') du côté de la chambre de combustion, cette pointe étant essentiellement conique et son diamètre extérieur allant en diminuant à partir de la tige (7') de l'aiguille d'injecteur, et
    un siège de soupape (11) réalisé à l'extrémité du perçage (5) du côté de la chambre de combustion, ayant une surface essentiellement conique contre laquelle vient en appui la surface-enveloppe de la pointe (30) de l'aiguille d'injecteur comme surface d'étanchéité de soupape (9) lorsque l'aiguille d'injecteur (7) est déplacée dans la direction de la force de fermeture et coupe ainsi de manière étanche au moins un orifice d'éjection (13) vis-à-vis de la chambre de pression (17),
    caractérisé par
    une rainure annulaire périphérique (23) entre la jonction de la tige (7') de l'aiguille d'injecteur vers la pointe (30) de l'aiguille d'injecteur et la surface d'étanchéité de soupape (9) de façon que la partie qui porte la surface d'étanchéité (9) de la pointe (30) de l'aiguille d'injecteur soit élastique et puisse être déformée élastiquement par rapport à la surface conique du siège de soupape (11).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la rainure annulaire (23) réalise au moins en partie une contre-dépouille pour la surface d'étanchéité (9).
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce qu'
    une gorge annulaire (25) est réalisée dans la pointe (30) de l'aiguille d'injecteur, la surface d'étanchéité (9) étant réalisée sur la surface tronconique entre la rainure annulaire (23) et la gorge annulaire (25).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    l'angle au sommet (β) du cône de la surface d'étanchéité de soupape (9) est supérieur à l'angle au sommet (α) du cône du siège d'étanchéité (11).
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    la différence (ϕ) des angles au sommet (α, β) des cônes du siège d'étanchéité (11) et de la surface d'étanchéité de soupape (9) est inférieure à 1°.
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    la différence (ϕ) de l'angle au sommet (α, β) du cône du siège de soupape (11) et de la surface d'étanchéité de soupape (9) est comprise entre 0,25° et 0,75°.
EP01909417A 2000-01-08 2001-01-05 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP1181445B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10000501 2000-01-08
DE10000501A DE10000501A1 (de) 2000-01-08 2000-01-08 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE2001/000003 WO2001051804A2 (fr) 2000-01-08 2001-01-05 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1181445A2 EP1181445A2 (fr) 2002-02-27
EP1181445B1 true EP1181445B1 (fr) 2005-04-06

Family

ID=7626967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01909417A Expired - Lifetime EP1181445B1 (fr) 2000-01-08 2001-01-05 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (6)

Country Link
US (1) US6669117B2 (fr)
EP (1) EP1181445B1 (fr)
JP (1) JP2003519756A (fr)
DE (2) DE10000501A1 (fr)
PL (1) PL350824A1 (fr)
WO (1) WO2001051804A2 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19942370A1 (de) * 1999-09-04 2001-03-22 Bosch Gmbh Robert Einspritzdüse für Brennkraftmaschinen mit einer Ringnut in der Düsennadel
DE10031264A1 (de) * 2000-06-27 2002-01-17 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10031537B4 (de) * 2000-06-28 2009-06-04 Continental Automotive Gmbh Ausbildung eines Einspritzventils zur Verminderung der Sitzbelastung
DE10219608A1 (de) 2002-05-02 2003-11-20 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10246693A1 (de) * 2002-10-07 2004-04-15 Siemens Ag Einspritzvorrichtung zum Einspritzen von Kraftstoff
DE10260975A1 (de) * 2002-12-24 2004-07-08 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10322826A1 (de) * 2003-05-19 2004-12-09 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10344897A1 (de) * 2003-09-26 2005-04-21 Bosch Gmbh Robert Ventil zur Steuerung einer Verbindung in einem Hochdruckflüssigkeitssystem, insbesondere einer Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1522721B1 (fr) * 2003-10-06 2006-05-03 Delphi Technologies, Inc. Buse d'injection
DE10351680A1 (de) * 2003-11-05 2005-06-09 Robert Bosch Gmbh Ventil für eine Kraftstoffeinspritzpumpe
EP1555430B1 (fr) * 2004-01-13 2007-01-03 Delphi Technologies, Inc. Buse d'injection
EP1559903B1 (fr) * 2004-01-28 2008-12-10 Continental Automotive Italy S.p.A. Injecteur de carburant avec aiguille déformable
DE102004059974A1 (de) * 2004-11-23 2006-06-01 Siemens Ag Düsenbaugruppe und Einspritzventil
DE102005037955A1 (de) * 2005-08-11 2007-02-15 Robert Bosch Gmbh Teilentdrosseltes Einspritzventilglied für Kraftstoffinjektoren
US7578450B2 (en) * 2005-08-25 2009-08-25 Caterpillar Inc. Fuel injector with grooved check member
US7360722B2 (en) * 2005-08-25 2008-04-22 Caterpillar Inc. Fuel injector with grooved check member
DE102006052817A1 (de) * 2006-11-09 2008-05-15 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102010040940A1 (de) 2010-09-17 2012-03-22 Robert Bosch Gmbh Düsenbaugruppe für einen Kraftstoffinjektor
JP5708342B2 (ja) * 2011-07-22 2015-04-30 株式会社デンソー 弁装置およびそれを用いた流体制御弁
DE102012204310A1 (de) * 2012-03-19 2013-09-19 Robert Bosch Gmbh Dicht umspritztes Bauelement und Verfahren zum Herstellen eines solchen Bauelements
DE102012211283A1 (de) 2012-06-29 2014-01-02 Robert Bosch Gmbh Leckage- und schlupfreduziertes Ventil

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882068A (ja) * 1981-11-09 1983-05-17 Nissan Motor Co Ltd 燃料噴射ノズル
DE3429471C2 (de) * 1984-08-10 1987-04-30 L'Orange GmbH, 7000 Stuttgart Kraftstoffeinspritzdüse für eine Brennkraftmaschine
GB9012844D0 (en) * 1990-06-08 1990-08-01 Lucas Ind Plc Fuel injection nozzles
GB9425652D0 (en) * 1994-12-20 1995-02-22 Lucas Ind Plc Fuel injection nozzle
DE19536330A1 (de) * 1995-09-29 1997-04-03 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19608575B4 (de) 1996-03-06 2005-10-20 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JP3075201B2 (ja) * 1996-12-20 2000-08-14 株式会社デンソー 燃料噴射弁

Also Published As

Publication number Publication date
WO2001051804A2 (fr) 2001-07-19
US6669117B2 (en) 2003-12-30
EP1181445A2 (fr) 2002-02-27
DE50105813D1 (de) 2005-05-12
PL350824A1 (en) 2003-02-10
DE10000501A1 (de) 2001-07-19
WO2001051804A3 (fr) 2001-12-06
JP2003519756A (ja) 2003-06-24
US20030057298A1 (en) 2003-03-27

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